From 8992cb1d0d07edc33d274f6d7924ecdf6f83d994 Mon Sep 17 00:00:00 2001
From: Tim Redfern <tim@eclectronics.org>
Date: Thu, 5 Sep 2013 17:57:22 +0100
Subject: making act segmenter

---
 ffmpeg/libavformat/movenc.c | 4084 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 4084 insertions(+)
 create mode 100644 ffmpeg/libavformat/movenc.c

(limited to 'ffmpeg/libavformat/movenc.c')

diff --git a/ffmpeg/libavformat/movenc.c b/ffmpeg/libavformat/movenc.c
new file mode 100644
index 0000000..42496b5
--- /dev/null
+++ b/ffmpeg/libavformat/movenc.c
@@ -0,0 +1,4084 @@
+/*
+ * MOV, 3GP, MP4 muxer
+ * Copyright (c) 2003 Thomas Raivio
+ * Copyright (c) 2004 Gildas Bazin <gbazin at videolan dot org>
+ * Copyright (c) 2009 Baptiste Coudurier <baptiste dot coudurier at gmail dot com>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "movenc.h"
+#include "avformat.h"
+#include "avio_internal.h"
+#include "riff.h"
+#include "avio.h"
+#include "isom.h"
+#include "avc.h"
+#include "libavcodec/get_bits.h"
+#include "libavcodec/put_bits.h"
+#include "libavcodec/vc1.h"
+#include "internal.h"
+#include "libavutil/avstring.h"
+#include "libavutil/intfloat.h"
+#include "libavutil/mathematics.h"
+#include "libavutil/opt.h"
+#include "libavutil/dict.h"
+#include "rtpenc.h"
+#include "mov_chan.h"
+
+#undef NDEBUG
+#include <assert.h>
+
+static const AVOption options[] = {
+    { "movflags", "MOV muxer flags", offsetof(MOVMuxContext, flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
+    { "rtphint", "Add RTP hint tracks", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_RTP_HINT}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
+    { "moov_size", "maximum moov size so it can be placed at the begin", offsetof(MOVMuxContext, reserved_moov_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, 0 },
+    { "empty_moov", "Make the initial moov atom empty (not supported by QuickTime)", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_EMPTY_MOOV}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
+    { "frag_keyframe", "Fragment at video keyframes", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_FRAG_KEYFRAME}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
+    { "separate_moof", "Write separate moof/mdat atoms for each track", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_SEPARATE_MOOF}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
+    { "frag_custom", "Flush fragments on caller requests", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_FRAG_CUSTOM}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
+    { "isml", "Create a live smooth streaming feed (for pushing to a publishing point)", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_ISML}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
+    { "faststart", "Run a second pass to put the moov at the beginning of the file", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_FASTSTART}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
+    FF_RTP_FLAG_OPTS(MOVMuxContext, rtp_flags),
+    { "skip_iods", "Skip writing iods atom.", offsetof(MOVMuxContext, iods_skip), AV_OPT_TYPE_INT, {.i64 = 1}, 0, 1, AV_OPT_FLAG_ENCODING_PARAM},
+    { "iods_audio_profile", "iods audio profile atom.", offsetof(MOVMuxContext, iods_audio_profile), AV_OPT_TYPE_INT, {.i64 = -1}, -1, 255, AV_OPT_FLAG_ENCODING_PARAM},
+    { "iods_video_profile", "iods video profile atom.", offsetof(MOVMuxContext, iods_video_profile), AV_OPT_TYPE_INT, {.i64 = -1}, -1, 255, AV_OPT_FLAG_ENCODING_PARAM},
+    { "frag_duration", "Maximum fragment duration", offsetof(MOVMuxContext, max_fragment_duration), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM},
+    { "min_frag_duration", "Minimum fragment duration", offsetof(MOVMuxContext, min_fragment_duration), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM},
+    { "frag_size", "Maximum fragment size", offsetof(MOVMuxContext, max_fragment_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM},
+    { "ism_lookahead", "Number of lookahead entries for ISM files", offsetof(MOVMuxContext, ism_lookahead), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM},
+    { "use_editlist", "use edit list", offsetof(MOVMuxContext, use_editlist), AV_OPT_TYPE_INT, {.i64 = -1}, -1, 1, AV_OPT_FLAG_ENCODING_PARAM},
+    { NULL },
+};
+
+#define MOV_CLASS(flavor)\
+static const AVClass flavor ## _muxer_class = {\
+    .class_name = #flavor " muxer",\
+    .item_name  = av_default_item_name,\
+    .option     = options,\
+    .version    = LIBAVUTIL_VERSION_INT,\
+};
+
+//FIXME support 64 bit variant with wide placeholders
+static int64_t update_size(AVIOContext *pb, int64_t pos)
+{
+    int64_t curpos = avio_tell(pb);
+    avio_seek(pb, pos, SEEK_SET);
+    avio_wb32(pb, curpos - pos); /* rewrite size */
+    avio_seek(pb, curpos, SEEK_SET);
+
+    return curpos - pos;
+}
+
+static int supports_edts(MOVMuxContext *mov)
+{
+    // EDTS with fragments is tricky as we dont know the duration when its written
+    return (mov->use_editlist<0 && !(mov->flags & FF_MOV_FLAG_FRAGMENT)) || mov->use_editlist>0;
+}
+
+static int is_co64_required(const MOVTrack *track)
+{
+    int i;
+
+    for (i = 0; i < track->entry; i++) {
+        if (!track->cluster[i].chunkNum)
+            continue;
+        if (track->cluster[i].pos + track->data_offset > UINT32_MAX)
+            return 1;
+    }
+    return 0;
+}
+
+/* Chunk offset atom */
+static int mov_write_stco_tag(AVIOContext *pb, MOVTrack *track)
+{
+    int i;
+    int mode64 = is_co64_required(track); // use 32 bit size variant if possible
+    int64_t pos = avio_tell(pb);
+    avio_wb32(pb, 0); /* size */
+    if (mode64)
+        ffio_wfourcc(pb, "co64");
+    else
+        ffio_wfourcc(pb, "stco");
+    avio_wb32(pb, 0); /* version & flags */
+    avio_wb32(pb, track->chunkCount); /* entry count */
+    for (i=0; i<track->entry; i++) {
+        if(!track->cluster[i].chunkNum)
+            continue;
+        if(mode64 == 1)
+            avio_wb64(pb, track->cluster[i].pos + track->data_offset);
+        else
+            avio_wb32(pb, track->cluster[i].pos + track->data_offset);
+    }
+    return update_size(pb, pos);
+}
+
+/* Sample size atom */
+static int mov_write_stsz_tag(AVIOContext *pb, MOVTrack *track)
+{
+    int equalChunks = 1;
+    int i, j, entries = 0, tst = -1, oldtst = -1;
+
+    int64_t pos = avio_tell(pb);
+    avio_wb32(pb, 0); /* size */
+    ffio_wfourcc(pb, "stsz");
+    avio_wb32(pb, 0); /* version & flags */
+
+    for (i=0; i<track->entry; i++) {
+        tst = track->cluster[i].size/track->cluster[i].entries;
+        if(oldtst != -1 && tst != oldtst) {
+            equalChunks = 0;
+        }
+        oldtst = tst;
+        entries += track->cluster[i].entries;
+    }
+    if (equalChunks && track->entry) {
+        int sSize = track->entry ? track->cluster[0].size/track->cluster[0].entries : 0;
+        sSize = FFMAX(1, sSize); // adpcm mono case could make sSize == 0
+        avio_wb32(pb, sSize); // sample size
+        avio_wb32(pb, entries); // sample count
+    }
+    else {
+        avio_wb32(pb, 0); // sample size
+        avio_wb32(pb, entries); // sample count
+        for (i=0; i<track->entry; i++) {
+            for (j=0; j<track->cluster[i].entries; j++) {
+                avio_wb32(pb, track->cluster[i].size /
+                         track->cluster[i].entries);
+            }
+        }
+    }
+    return update_size(pb, pos);
+}
+
+/* Sample to chunk atom */
+static int mov_write_stsc_tag(AVIOContext *pb, MOVTrack *track)
+{
+    int index = 0, oldval = -1, i;
+    int64_t entryPos, curpos;
+
+    int64_t pos = avio_tell(pb);
+    avio_wb32(pb, 0); /* size */
+    ffio_wfourcc(pb, "stsc");
+    avio_wb32(pb, 0); // version & flags
+    entryPos = avio_tell(pb);
+    avio_wb32(pb, track->chunkCount); // entry count
+    for (i=0; i<track->entry; i++) {
+        if (oldval != track->cluster[i].samples_in_chunk && track->cluster[i].chunkNum)
+        {
+            avio_wb32(pb, track->cluster[i].chunkNum); // first chunk
+            avio_wb32(pb, track->cluster[i].samples_in_chunk); // samples per chunk
+            avio_wb32(pb, 0x1); // sample description index
+            oldval = track->cluster[i].samples_in_chunk;
+            index++;
+        }
+    }
+    curpos = avio_tell(pb);
+    avio_seek(pb, entryPos, SEEK_SET);
+    avio_wb32(pb, index); // rewrite size
+    avio_seek(pb, curpos, SEEK_SET);
+
+    return update_size(pb, pos);
+}
+
+/* Sync sample atom */
+static int mov_write_stss_tag(AVIOContext *pb, MOVTrack *track, uint32_t flag)
+{
+    int64_t curpos, entryPos;
+    int i, index = 0;
+    int64_t pos = avio_tell(pb);
+    avio_wb32(pb, 0); // size
+    ffio_wfourcc(pb, flag == MOV_SYNC_SAMPLE ? "stss" : "stps");
+    avio_wb32(pb, 0); // version & flags
+    entryPos = avio_tell(pb);
+    avio_wb32(pb, track->entry); // entry count
+    for (i=0; i<track->entry; i++) {
+        if (track->cluster[i].flags & flag) {
+            avio_wb32(pb, i+1);
+            index++;
+        }
+    }
+    curpos = avio_tell(pb);
+    avio_seek(pb, entryPos, SEEK_SET);
+    avio_wb32(pb, index); // rewrite size
+    avio_seek(pb, curpos, SEEK_SET);
+    return update_size(pb, pos);
+}
+
+static int mov_write_amr_tag(AVIOContext *pb, MOVTrack *track)
+{
+    avio_wb32(pb, 0x11); /* size */
+    if (track->mode == MODE_MOV) ffio_wfourcc(pb, "samr");
+    else                         ffio_wfourcc(pb, "damr");
+    ffio_wfourcc(pb, "FFMP");
+    avio_w8(pb, 0); /* decoder version */
+
+    avio_wb16(pb, 0x81FF); /* Mode set (all modes for AMR_NB) */
+    avio_w8(pb, 0x00); /* Mode change period (no restriction) */
+    avio_w8(pb, 0x01); /* Frames per sample */
+    return 0x11;
+}
+
+static int mov_write_ac3_tag(AVIOContext *pb, MOVTrack *track)
+{
+    GetBitContext gbc;
+    PutBitContext pbc;
+    uint8_t buf[3];
+    int fscod, bsid, bsmod, acmod, lfeon, frmsizecod;
+
+    if (track->vos_len < 7)
+        return -1;
+
+    avio_wb32(pb, 11);
+    ffio_wfourcc(pb, "dac3");
+
+    init_get_bits(&gbc, track->vos_data + 4, (track->vos_len - 4) * 8);
+    fscod      = get_bits(&gbc, 2);
+    frmsizecod = get_bits(&gbc, 6);
+    bsid       = get_bits(&gbc, 5);
+    bsmod      = get_bits(&gbc, 3);
+    acmod      = get_bits(&gbc, 3);
+    if (acmod == 2) {
+        skip_bits(&gbc, 2); // dsurmod
+    } else {
+        if ((acmod & 1) && acmod != 1)
+            skip_bits(&gbc, 2); // cmixlev
+        if (acmod & 4)
+            skip_bits(&gbc, 2); // surmixlev
+    }
+    lfeon = get_bits1(&gbc);
+
+    init_put_bits(&pbc, buf, sizeof(buf));
+    put_bits(&pbc, 2, fscod);
+    put_bits(&pbc, 5, bsid);
+    put_bits(&pbc, 3, bsmod);
+    put_bits(&pbc, 3, acmod);
+    put_bits(&pbc, 1, lfeon);
+    put_bits(&pbc, 5, frmsizecod>>1); // bit_rate_code
+    put_bits(&pbc, 5, 0); // reserved
+
+    flush_put_bits(&pbc);
+    avio_write(pb, buf, sizeof(buf));
+
+    return 11;
+}
+
+/**
+ * This function writes extradata "as is".
+ * Extradata must be formatted like a valid atom (with size and tag).
+ */
+static int mov_write_extradata_tag(AVIOContext *pb, MOVTrack *track)
+{
+    avio_write(pb, track->enc->extradata, track->enc->extradata_size);
+    return track->enc->extradata_size;
+}
+
+static int mov_write_enda_tag(AVIOContext *pb)
+{
+    avio_wb32(pb, 10);
+    ffio_wfourcc(pb, "enda");
+    avio_wb16(pb, 1); /* little endian */
+    return 10;
+}
+
+static int mov_write_enda_tag_be(AVIOContext *pb)
+{
+  avio_wb32(pb, 10);
+  ffio_wfourcc(pb, "enda");
+  avio_wb16(pb, 0); /* big endian */
+  return 10;
+}
+
+static void put_descr(AVIOContext *pb, int tag, unsigned int size)
+{
+    int i = 3;
+    avio_w8(pb, tag);
+    for(; i>0; i--)
+        avio_w8(pb, (size>>(7*i)) | 0x80);
+    avio_w8(pb, size & 0x7F);
+}
+
+static unsigned compute_avg_bitrate(MOVTrack *track)
+{
+    uint64_t size = 0;
+    int i;
+    if (!track->track_duration)
+        return 0;
+    for (i = 0; i < track->entry; i++)
+        size += track->cluster[i].size;
+    return size * 8 * track->timescale / track->track_duration;
+}
+
+static int mov_write_esds_tag(AVIOContext *pb, MOVTrack *track) // Basic
+{
+    int64_t pos = avio_tell(pb);
+    int decoder_specific_info_len = track->vos_len ? 5 + track->vos_len : 0;
+    unsigned avg_bitrate;
+
+    avio_wb32(pb, 0); // size
+    ffio_wfourcc(pb, "esds");
+    avio_wb32(pb, 0); // Version
+
+    // ES descriptor
+    put_descr(pb, 0x03, 3 + 5+13 + decoder_specific_info_len + 5+1);
+    avio_wb16(pb, track->track_id);
+    avio_w8(pb, 0x00); // flags (= no flags)
+
+    // DecoderConfig descriptor
+    put_descr(pb, 0x04, 13 + decoder_specific_info_len);
+
+    // Object type indication
+    if ((track->enc->codec_id == AV_CODEC_ID_MP2 ||
+         track->enc->codec_id == AV_CODEC_ID_MP3) &&
+        track->enc->sample_rate > 24000)
+        avio_w8(pb, 0x6B); // 11172-3
+    else
+        avio_w8(pb, ff_codec_get_tag(ff_mp4_obj_type, track->enc->codec_id));
+
+    // the following fields is made of 6 bits to identify the streamtype (4 for video, 5 for audio)
+    // plus 1 bit to indicate upstream and 1 bit set to 1 (reserved)
+    if(track->enc->codec_type == AVMEDIA_TYPE_AUDIO)
+        avio_w8(pb, 0x15); // flags (= Audiostream)
+    else
+        avio_w8(pb, 0x11); // flags (= Visualstream)
+
+    avio_wb24(pb, track->enc->rc_buffer_size >> 3); // Buffersize DB
+
+    avg_bitrate = compute_avg_bitrate(track);
+    // maxbitrate (FIXME should be max rate in any 1 sec window)
+    avio_wb32(pb, FFMAX3(track->enc->bit_rate, track->enc->rc_max_rate, avg_bitrate));
+    avio_wb32(pb, avg_bitrate);
+
+    if (track->vos_len) {
+        // DecoderSpecific info descriptor
+        put_descr(pb, 0x05, track->vos_len);
+        avio_write(pb, track->vos_data, track->vos_len);
+    }
+
+    // SL descriptor
+    put_descr(pb, 0x06, 1);
+    avio_w8(pb, 0x02);
+    return update_size(pb, pos);
+}
+
+static int mov_pcm_le_gt16(enum AVCodecID codec_id)
+{
+    return codec_id == AV_CODEC_ID_PCM_S24LE ||
+           codec_id == AV_CODEC_ID_PCM_S32LE ||
+           codec_id == AV_CODEC_ID_PCM_F32LE ||
+           codec_id == AV_CODEC_ID_PCM_F64LE;
+}
+
+static int mov_pcm_be_gt16(enum AVCodecID codec_id)
+{
+    return codec_id == AV_CODEC_ID_PCM_S24BE ||
+           codec_id == AV_CODEC_ID_PCM_S32BE ||
+           codec_id == AV_CODEC_ID_PCM_F32BE ||
+           codec_id == AV_CODEC_ID_PCM_F64BE;
+}
+
+static int mov_write_ms_tag(AVIOContext *pb, MOVTrack *track)
+{
+    int64_t pos = avio_tell(pb);
+    avio_wb32(pb, 0);
+    avio_wl32(pb, track->tag); // store it byteswapped
+    track->enc->codec_tag = av_bswap16(track->tag >> 16);
+    ff_put_wav_header(pb, track->enc);
+    return update_size(pb, pos);
+}
+
+static int mov_write_wfex_tag(AVIOContext *pb, MOVTrack *track)
+{
+    int64_t pos = avio_tell(pb);
+    avio_wb32(pb, 0);
+    ffio_wfourcc(pb, "wfex");
+    ff_put_wav_header(pb, track->enc);
+    return update_size(pb, pos);
+}
+
+static int mov_write_chan_tag(AVIOContext *pb, MOVTrack *track)
+{
+    uint32_t layout_tag, bitmap;
+    int64_t pos = avio_tell(pb);
+
+    layout_tag = ff_mov_get_channel_layout_tag(track->enc->codec_id,
+                                               track->enc->channel_layout,
+                                               &bitmap);
+    if (!layout_tag) {
+        av_log(track->enc, AV_LOG_WARNING, "not writing 'chan' tag due to "
+               "lack of channel information\n");
+        return 0;
+    }
+
+    avio_wb32(pb, 0);           // Size
+    ffio_wfourcc(pb, "chan");   // Type
+    avio_w8(pb, 0);             // Version
+    avio_wb24(pb, 0);           // Flags
+    avio_wb32(pb, layout_tag);  // mChannelLayoutTag
+    avio_wb32(pb, bitmap);      // mChannelBitmap
+    avio_wb32(pb, 0);           // mNumberChannelDescriptions
+
+    return update_size(pb, pos);
+}
+
+static int mov_write_wave_tag(AVIOContext *pb, MOVTrack *track)
+{
+    int64_t pos = avio_tell(pb);
+
+    avio_wb32(pb, 0);     /* size */
+    ffio_wfourcc(pb, "wave");
+
+    if (track->enc->codec_id != AV_CODEC_ID_QDM2) {
+    avio_wb32(pb, 12);    /* size */
+    ffio_wfourcc(pb, "frma");
+    avio_wl32(pb, track->tag);
+    }
+
+    if (track->enc->codec_id == AV_CODEC_ID_AAC) {
+        /* useless atom needed by mplayer, ipod, not needed by quicktime */
+        avio_wb32(pb, 12); /* size */
+        ffio_wfourcc(pb, "mp4a");
+        avio_wb32(pb, 0);
+        mov_write_esds_tag(pb, track);
+    } else if (mov_pcm_le_gt16(track->enc->codec_id))  {
+      mov_write_enda_tag(pb);
+    } else if (mov_pcm_be_gt16(track->enc->codec_id))  {
+      mov_write_enda_tag_be(pb);
+    } else if (track->enc->codec_id == AV_CODEC_ID_AMR_NB) {
+        mov_write_amr_tag(pb, track);
+    } else if (track->enc->codec_id == AV_CODEC_ID_AC3) {
+        mov_write_ac3_tag(pb, track);
+    } else if (track->enc->codec_id == AV_CODEC_ID_ALAC ||
+               track->enc->codec_id == AV_CODEC_ID_QDM2) {
+        mov_write_extradata_tag(pb, track);
+    } else if (track->enc->codec_id == AV_CODEC_ID_ADPCM_MS ||
+               track->enc->codec_id == AV_CODEC_ID_ADPCM_IMA_WAV) {
+        mov_write_ms_tag(pb, track);
+    }
+
+    avio_wb32(pb, 8);     /* size */
+    avio_wb32(pb, 0);     /* null tag */
+
+    return update_size(pb, pos);
+}
+
+static int mov_write_dvc1_structs(MOVTrack *track, uint8_t *buf)
+{
+    uint8_t *unescaped;
+    const uint8_t *start, *next, *end = track->vos_data + track->vos_len;
+    int unescaped_size, seq_found = 0;
+    int level = 0, interlace = 0;
+    int packet_seq   = track->vc1_info.packet_seq;
+    int packet_entry = track->vc1_info.packet_entry;
+    int slices       = track->vc1_info.slices;
+    PutBitContext pbc;
+
+    if (track->start_dts == AV_NOPTS_VALUE) {
+        /* No packets written yet, vc1_info isn't authoritative yet. */
+        /* Assume inline sequence and entry headers. This will be
+         * overwritten at the end if the file is seekable. */
+        packet_seq = packet_entry = 1;
+    }
+
+    unescaped = av_mallocz(track->vos_len + FF_INPUT_BUFFER_PADDING_SIZE);
+    if (!unescaped)
+        return AVERROR(ENOMEM);
+    start = find_next_marker(track->vos_data, end);
+    for (next = start; next < end; start = next) {
+        GetBitContext gb;
+        int size;
+        next = find_next_marker(start + 4, end);
+        size = next - start - 4;
+        if (size <= 0)
+            continue;
+        unescaped_size = vc1_unescape_buffer(start + 4, size, unescaped);
+        init_get_bits(&gb, unescaped, 8 * unescaped_size);
+        if (AV_RB32(start) == VC1_CODE_SEQHDR) {
+            int profile = get_bits(&gb, 2);
+            if (profile != PROFILE_ADVANCED) {
+                av_free(unescaped);
+                return AVERROR(ENOSYS);
+            }
+            seq_found = 1;
+            level = get_bits(&gb, 3);
+            /* chromaformat, frmrtq_postproc, bitrtq_postproc, postprocflag,
+             * width, height */
+            skip_bits_long(&gb, 2 + 3 + 5 + 1 + 2*12);
+            skip_bits(&gb, 1); /* broadcast */
+            interlace = get_bits1(&gb);
+            skip_bits(&gb, 4); /* tfcntrflag, finterpflag, reserved, psf */
+        }
+    }
+    if (!seq_found) {
+        av_free(unescaped);
+        return AVERROR(ENOSYS);
+    }
+
+    init_put_bits(&pbc, buf, 7);
+    /* VC1DecSpecStruc */
+    put_bits(&pbc, 4, 12); /* profile - advanced */
+    put_bits(&pbc, 3, level);
+    put_bits(&pbc, 1, 0); /* reserved */
+    /* VC1AdvDecSpecStruc */
+    put_bits(&pbc, 3, level);
+    put_bits(&pbc, 1, 0); /* cbr */
+    put_bits(&pbc, 6, 0); /* reserved */
+    put_bits(&pbc, 1, !interlace); /* no interlace */
+    put_bits(&pbc, 1, !packet_seq); /* no multiple seq */
+    put_bits(&pbc, 1, !packet_entry); /* no multiple entry */
+    put_bits(&pbc, 1, !slices); /* no slice code */
+    put_bits(&pbc, 1, 0); /* no bframe */
+    put_bits(&pbc, 1, 0); /* reserved */
+    put_bits32(&pbc, track->enc->time_base.den); /* framerate */
+    flush_put_bits(&pbc);
+
+    av_free(unescaped);
+
+    return 0;
+}
+
+static int mov_write_dvc1_tag(AVIOContext *pb, MOVTrack *track)
+{
+    uint8_t buf[7] = { 0 };
+    int ret;
+
+    if ((ret = mov_write_dvc1_structs(track, buf)) < 0)
+        return ret;
+
+    avio_wb32(pb, track->vos_len + 8 + sizeof(buf));
+    ffio_wfourcc(pb, "dvc1");
+    track->vc1_info.struct_offset = avio_tell(pb);
+    avio_write(pb, buf, sizeof(buf));
+    avio_write(pb, track->vos_data, track->vos_len);
+
+    return 0;
+}
+
+static int mov_write_glbl_tag(AVIOContext *pb, MOVTrack *track)
+{
+    avio_wb32(pb, track->vos_len + 8);
+    ffio_wfourcc(pb, "glbl");
+    avio_write(pb, track->vos_data, track->vos_len);
+    return 8 + track->vos_len;
+}
+
+/**
+ * Compute flags for 'lpcm' tag.
+ * See CoreAudioTypes and AudioStreamBasicDescription at Apple.
+ */
+static int mov_get_lpcm_flags(enum AVCodecID codec_id)
+{
+    switch (codec_id) {
+    case AV_CODEC_ID_PCM_F32BE:
+    case AV_CODEC_ID_PCM_F64BE:
+        return 11;
+    case AV_CODEC_ID_PCM_F32LE:
+    case AV_CODEC_ID_PCM_F64LE:
+        return 9;
+    case AV_CODEC_ID_PCM_U8:
+        return 10;
+    case AV_CODEC_ID_PCM_S16BE:
+    case AV_CODEC_ID_PCM_S24BE:
+    case AV_CODEC_ID_PCM_S32BE:
+        return 14;
+    case AV_CODEC_ID_PCM_S8:
+    case AV_CODEC_ID_PCM_S16LE:
+    case AV_CODEC_ID_PCM_S24LE:
+    case AV_CODEC_ID_PCM_S32LE:
+        return 12;
+    default:
+        return 0;
+    }
+}
+
+static int get_cluster_duration(MOVTrack *track, int cluster_idx)
+{
+    int64_t next_dts;
+
+    if (cluster_idx >= track->entry)
+        return 0;
+
+    if (cluster_idx + 1 == track->entry)
+        next_dts = track->track_duration + track->start_dts;
+    else
+        next_dts = track->cluster[cluster_idx + 1].dts;
+
+    return next_dts - track->cluster[cluster_idx].dts;
+}
+
+static int get_samples_per_packet(MOVTrack *track)
+{
+    int i, first_duration;
+
+// return track->enc->frame_size;
+
+    /* use 1 for raw PCM */
+    if (!track->audio_vbr)
+        return 1;
+
+    /* check to see if duration is constant for all clusters */
+    if (!track->entry)
+        return 0;
+    first_duration = get_cluster_duration(track, 0);
+    for (i = 1; i < track->entry; i++) {
+        if (get_cluster_duration(track, i) != first_duration)
+            return 0;
+    }
+    return first_duration;
+}
+
+static int mov_write_audio_tag(AVIOContext *pb, MOVTrack *track)
+{
+    int64_t pos = avio_tell(pb);
+    int version = 0;
+    uint32_t tag = track->tag;
+
+    if (track->mode == MODE_MOV) {
+        if (track->timescale > UINT16_MAX) {
+            if (mov_get_lpcm_flags(track->enc->codec_id))
+                tag = AV_RL32("lpcm");
+            version = 2;
+        } else if (track->audio_vbr || mov_pcm_le_gt16(track->enc->codec_id) ||
+                   mov_pcm_be_gt16(track->enc->codec_id) ||
+                   track->enc->codec_id == AV_CODEC_ID_ADPCM_MS ||
+                   track->enc->codec_id == AV_CODEC_ID_ADPCM_IMA_WAV ||
+                   track->enc->codec_id == AV_CODEC_ID_QDM2) {
+            version = 1;
+        }
+    }
+
+    avio_wb32(pb, 0); /* size */
+    avio_wl32(pb, tag); // store it byteswapped
+    avio_wb32(pb, 0); /* Reserved */
+    avio_wb16(pb, 0); /* Reserved */
+    avio_wb16(pb, 1); /* Data-reference index, XXX  == 1 */
+
+    /* SoundDescription */
+    avio_wb16(pb, version); /* Version */
+    avio_wb16(pb, 0); /* Revision level */
+    avio_wb32(pb, 0); /* Reserved */
+
+    if (version == 2) {
+        avio_wb16(pb, 3);
+        avio_wb16(pb, 16);
+        avio_wb16(pb, 0xfffe);
+        avio_wb16(pb, 0);
+        avio_wb32(pb, 0x00010000);
+        avio_wb32(pb, 72);
+        avio_wb64(pb, av_double2int(track->enc->sample_rate));
+        avio_wb32(pb, track->enc->channels);
+        avio_wb32(pb, 0x7F000000);
+        avio_wb32(pb, av_get_bits_per_sample(track->enc->codec_id));
+        avio_wb32(pb, mov_get_lpcm_flags(track->enc->codec_id));
+        avio_wb32(pb, track->sample_size);
+        avio_wb32(pb, get_samples_per_packet(track));
+    } else {
+        if (track->mode == MODE_MOV) {
+            avio_wb16(pb, track->enc->channels);
+            if (track->enc->codec_id == AV_CODEC_ID_PCM_U8 ||
+                track->enc->codec_id == AV_CODEC_ID_PCM_S8)
+                avio_wb16(pb, 8); /* bits per sample */
+            else
+                avio_wb16(pb, 16);
+            avio_wb16(pb, track->audio_vbr ? -2 : 0); /* compression ID */
+        } else { /* reserved for mp4/3gp */
+            avio_wb16(pb, 2);
+            avio_wb16(pb, 16);
+            avio_wb16(pb, 0);
+        }
+
+        avio_wb16(pb, 0); /* packet size (= 0) */
+        avio_wb16(pb, track->enc->sample_rate <= UINT16_MAX ?
+                      track->enc->sample_rate : 0);
+        avio_wb16(pb, 0); /* Reserved */
+    }
+
+    if(version == 1) { /* SoundDescription V1 extended info */
+        if (mov_pcm_le_gt16(track->enc->codec_id) ||
+            mov_pcm_be_gt16(track->enc->codec_id))
+            avio_wb32(pb, 1); /*  must be 1 for  uncompressed formats */
+        else
+            avio_wb32(pb, track->enc->frame_size); /* Samples per packet */
+        avio_wb32(pb, track->sample_size / track->enc->channels); /* Bytes per packet */
+        avio_wb32(pb, track->sample_size); /* Bytes per frame */
+        avio_wb32(pb, 2); /* Bytes per sample */
+    }
+
+    if(track->mode == MODE_MOV &&
+       (track->enc->codec_id == AV_CODEC_ID_AAC ||
+        track->enc->codec_id == AV_CODEC_ID_AC3 ||
+        track->enc->codec_id == AV_CODEC_ID_AMR_NB ||
+        track->enc->codec_id == AV_CODEC_ID_ALAC ||
+        track->enc->codec_id == AV_CODEC_ID_ADPCM_MS ||
+        track->enc->codec_id == AV_CODEC_ID_ADPCM_IMA_WAV ||
+        track->enc->codec_id == AV_CODEC_ID_QDM2 ||
+        (mov_pcm_le_gt16(track->enc->codec_id) && version==1) ||
+        (mov_pcm_be_gt16(track->enc->codec_id) && version==1)))
+        mov_write_wave_tag(pb, track);
+    else if(track->tag == MKTAG('m','p','4','a'))
+        mov_write_esds_tag(pb, track);
+    else if(track->enc->codec_id == AV_CODEC_ID_AMR_NB)
+        mov_write_amr_tag(pb, track);
+    else if(track->enc->codec_id == AV_CODEC_ID_AC3)
+        mov_write_ac3_tag(pb, track);
+    else if(track->enc->codec_id == AV_CODEC_ID_ALAC)
+        mov_write_extradata_tag(pb, track);
+    else if (track->enc->codec_id == AV_CODEC_ID_WMAPRO)
+        mov_write_wfex_tag(pb, track);
+    else if (track->vos_len > 0)
+        mov_write_glbl_tag(pb, track);
+
+    if (track->mode == MODE_MOV && track->enc->codec_type == AVMEDIA_TYPE_AUDIO)
+        mov_write_chan_tag(pb, track);
+
+    return update_size(pb, pos);
+}
+
+static int mov_write_d263_tag(AVIOContext *pb)
+{
+    avio_wb32(pb, 0xf); /* size */
+    ffio_wfourcc(pb, "d263");
+    ffio_wfourcc(pb, "FFMP");
+    avio_w8(pb, 0); /* decoder version */
+    /* FIXME use AVCodecContext level/profile, when encoder will set values */
+    avio_w8(pb, 0xa); /* level */
+    avio_w8(pb, 0); /* profile */
+    return 0xf;
+}
+
+static int mov_write_avcc_tag(AVIOContext *pb, MOVTrack *track)
+{
+    int64_t pos = avio_tell(pb);
+
+    avio_wb32(pb, 0);
+    ffio_wfourcc(pb, "avcC");
+    ff_isom_write_avcc(pb, track->vos_data, track->vos_len);
+    return update_size(pb, pos);
+}
+
+/* also used by all avid codecs (dv, imx, meridien) and their variants */
+static int mov_write_avid_tag(AVIOContext *pb, MOVTrack *track)
+{
+    int i;
+    avio_wb32(pb, 24); /* size */
+    ffio_wfourcc(pb, "ACLR");
+    ffio_wfourcc(pb, "ACLR");
+    ffio_wfourcc(pb, "0001");
+    avio_wb32(pb, 2); /* yuv range: full 1 / normal 2 */
+    avio_wb32(pb, 0); /* unknown */
+
+    avio_wb32(pb, 24); /* size */
+    ffio_wfourcc(pb, "APRG");
+    ffio_wfourcc(pb, "APRG");
+    ffio_wfourcc(pb, "0001");
+    avio_wb32(pb, 1); /* unknown */
+    avio_wb32(pb, 0); /* unknown */
+
+    avio_wb32(pb, 120); /* size */
+    ffio_wfourcc(pb, "ARES");
+    ffio_wfourcc(pb, "ARES");
+    ffio_wfourcc(pb, "0001");
+    avio_wb32(pb, AV_RB32(track->vos_data + 0x28)); /* dnxhd cid, some id ? */
+    avio_wb32(pb, track->enc->width);
+    /* values below are based on samples created with quicktime and avid codecs */
+    if (track->vos_data[5] & 2) { // interlaced
+        avio_wb32(pb, track->enc->height/2);
+        avio_wb32(pb, 2); /* unknown */
+        avio_wb32(pb, 0); /* unknown */
+        avio_wb32(pb, 4); /* unknown */
+    } else {
+        avio_wb32(pb, track->enc->height);
+        avio_wb32(pb, 1); /* unknown */
+        avio_wb32(pb, 0); /* unknown */
+        if (track->enc->height == 1080)
+            avio_wb32(pb, 5); /* unknown */
+        else
+            avio_wb32(pb, 6); /* unknown */
+    }
+    /* padding */
+    for (i = 0; i < 10; i++)
+        avio_wb64(pb, 0);
+
+    /* extra padding for stsd needed */
+    avio_wb32(pb, 0);
+    return 0;
+}
+
+static int mp4_get_codec_tag(AVFormatContext *s, MOVTrack *track)
+{
+    int tag = track->enc->codec_tag;
+
+    if (!ff_codec_get_tag(ff_mp4_obj_type, track->enc->codec_id))
+        return 0;
+
+    if      (track->enc->codec_id == AV_CODEC_ID_H264)      tag = MKTAG('a','v','c','1');
+    else if (track->enc->codec_id == AV_CODEC_ID_AC3)       tag = MKTAG('a','c','-','3');
+    else if (track->enc->codec_id == AV_CODEC_ID_DIRAC)     tag = MKTAG('d','r','a','c');
+    else if (track->enc->codec_id == AV_CODEC_ID_MOV_TEXT)  tag = MKTAG('t','x','3','g');
+    else if (track->enc->codec_id == AV_CODEC_ID_VC1)       tag = MKTAG('v','c','-','1');
+    else if (track->enc->codec_type == AVMEDIA_TYPE_VIDEO) tag = MKTAG('m','p','4','v');
+    else if (track->enc->codec_type == AVMEDIA_TYPE_AUDIO) tag = MKTAG('m','p','4','a');
+
+    return tag;
+}
+
+static const AVCodecTag codec_ipod_tags[] = {
+    { AV_CODEC_ID_H264,   MKTAG('a','v','c','1') },
+    { AV_CODEC_ID_MPEG4,  MKTAG('m','p','4','v') },
+    { AV_CODEC_ID_AAC,    MKTAG('m','p','4','a') },
+    { AV_CODEC_ID_ALAC,   MKTAG('a','l','a','c') },
+    { AV_CODEC_ID_AC3,    MKTAG('a','c','-','3') },
+    { AV_CODEC_ID_MOV_TEXT, MKTAG('t','x','3','g') },
+    { AV_CODEC_ID_MOV_TEXT, MKTAG('t','e','x','t') },
+    { AV_CODEC_ID_NONE, 0 },
+};
+
+static int ipod_get_codec_tag(AVFormatContext *s, MOVTrack *track)
+{
+    int tag = track->enc->codec_tag;
+
+    // keep original tag for subs, ipod supports both formats
+    if (!(track->enc->codec_type == AVMEDIA_TYPE_SUBTITLE &&
+        (tag == MKTAG('t','x','3','g') ||
+         tag == MKTAG('t','e','x','t'))))
+        tag = ff_codec_get_tag(codec_ipod_tags, track->enc->codec_id);
+
+    if (!av_match_ext(s->filename, "m4a") && !av_match_ext(s->filename, "m4v"))
+        av_log(s, AV_LOG_WARNING, "Warning, extension is not .m4a nor .m4v "
+               "Quicktime/Ipod might not play the file\n");
+
+    return tag;
+}
+
+static int mov_get_dv_codec_tag(AVFormatContext *s, MOVTrack *track)
+{
+    int tag;
+
+    if (track->enc->width == 720) { /* SD */
+        if (track->enc->height == 480) { /* NTSC */
+            if  (track->enc->pix_fmt == AV_PIX_FMT_YUV422P) tag = MKTAG('d','v','5','n');
+            else                                         tag = MKTAG('d','v','c',' ');
+       }else if (track->enc->pix_fmt == AV_PIX_FMT_YUV422P) tag = MKTAG('d','v','5','p');
+        else if (track->enc->pix_fmt == AV_PIX_FMT_YUV420P) tag = MKTAG('d','v','c','p');
+        else                                             tag = MKTAG('d','v','p','p');
+    } else if (track->enc->height == 720) { /* HD 720 line */
+        if  (track->enc->time_base.den == 50)            tag = MKTAG('d','v','h','q');
+        else                                             tag = MKTAG('d','v','h','p');
+    } else if (track->enc->height == 1080) { /* HD 1080 line */
+        if  (track->enc->time_base.den == 25)            tag = MKTAG('d','v','h','5');
+        else                                             tag = MKTAG('d','v','h','6');
+    } else {
+        av_log(s, AV_LOG_ERROR, "unsupported height for dv codec\n");
+        return 0;
+    }
+
+    return tag;
+}
+
+static const struct {
+    enum AVPixelFormat pix_fmt;
+    uint32_t tag;
+    unsigned bps;
+} mov_pix_fmt_tags[] = {
+    { AV_PIX_FMT_YUYV422, MKTAG('y','u','v','2'),  0 },
+    { AV_PIX_FMT_YUYV422, MKTAG('y','u','v','s'),  0 },
+    { AV_PIX_FMT_UYVY422, MKTAG('2','v','u','y'),  0 },
+    { AV_PIX_FMT_RGB555BE,MKTAG('r','a','w',' '), 16 },
+    { AV_PIX_FMT_RGB555LE,MKTAG('L','5','5','5'), 16 },
+    { AV_PIX_FMT_RGB565LE,MKTAG('L','5','6','5'), 16 },
+    { AV_PIX_FMT_RGB565BE,MKTAG('B','5','6','5'), 16 },
+    { AV_PIX_FMT_GRAY16BE,MKTAG('b','1','6','g'), 16 },
+    { AV_PIX_FMT_RGB24,   MKTAG('r','a','w',' '), 24 },
+    { AV_PIX_FMT_BGR24,   MKTAG('2','4','B','G'), 24 },
+    { AV_PIX_FMT_ARGB,    MKTAG('r','a','w',' '), 32 },
+    { AV_PIX_FMT_BGRA,    MKTAG('B','G','R','A'), 32 },
+    { AV_PIX_FMT_RGBA,    MKTAG('R','G','B','A'), 32 },
+    { AV_PIX_FMT_ABGR,    MKTAG('A','B','G','R'), 32 },
+    { AV_PIX_FMT_RGB48BE, MKTAG('b','4','8','r'), 48 },
+};
+
+static int mov_get_rawvideo_codec_tag(AVFormatContext *s, MOVTrack *track)
+{
+    int tag = track->enc->codec_tag;
+    int i;
+
+    for (i = 0; i < FF_ARRAY_ELEMS(mov_pix_fmt_tags); i++) {
+        if (track->enc->pix_fmt == mov_pix_fmt_tags[i].pix_fmt) {
+            tag = mov_pix_fmt_tags[i].tag;
+            track->enc->bits_per_coded_sample = mov_pix_fmt_tags[i].bps;
+            if (track->enc->codec_tag == mov_pix_fmt_tags[i].tag)
+                break;
+        }
+    }
+
+    return tag;
+}
+
+static int mov_get_codec_tag(AVFormatContext *s, MOVTrack *track)
+{
+    int tag = track->enc->codec_tag;
+
+    if (!tag || (track->enc->strict_std_compliance >= FF_COMPLIANCE_NORMAL &&
+                 (track->enc->codec_id == AV_CODEC_ID_DVVIDEO ||
+                  track->enc->codec_id == AV_CODEC_ID_RAWVIDEO ||
+                  track->enc->codec_id == AV_CODEC_ID_H263 ||
+                  av_get_bits_per_sample(track->enc->codec_id)))) { // pcm audio
+        if (track->enc->codec_id == AV_CODEC_ID_DVVIDEO)
+            tag = mov_get_dv_codec_tag(s, track);
+        else if (track->enc->codec_id == AV_CODEC_ID_RAWVIDEO)
+            tag = mov_get_rawvideo_codec_tag(s, track);
+        else if (track->enc->codec_type == AVMEDIA_TYPE_VIDEO) {
+            tag = ff_codec_get_tag(ff_codec_movvideo_tags, track->enc->codec_id);
+            if (!tag) { // if no mac fcc found, try with Microsoft tags
+                tag = ff_codec_get_tag(ff_codec_bmp_tags, track->enc->codec_id);
+                if (tag)
+                    av_log(s, AV_LOG_WARNING, "Using MS style video codec tag, "
+                           "the file may be unplayable!\n");
+            }
+        } else if (track->enc->codec_type == AVMEDIA_TYPE_AUDIO) {
+            tag = ff_codec_get_tag(ff_codec_movaudio_tags, track->enc->codec_id);
+            if (!tag) { // if no mac fcc found, try with Microsoft tags
+                int ms_tag = ff_codec_get_tag(ff_codec_wav_tags, track->enc->codec_id);
+                if (ms_tag) {
+                    tag = MKTAG('m', 's', ((ms_tag >> 8) & 0xff), (ms_tag & 0xff));
+                    av_log(s, AV_LOG_WARNING, "Using MS style audio codec tag, "
+                           "the file may be unplayable!\n");
+                }
+            }
+        } else if (track->enc->codec_type == AVMEDIA_TYPE_SUBTITLE)
+            tag = ff_codec_get_tag(ff_codec_movsubtitle_tags, track->enc->codec_id);
+    }
+
+    return tag;
+}
+
+static const AVCodecTag codec_3gp_tags[] = {
+    { AV_CODEC_ID_H263,   MKTAG('s','2','6','3') },
+    { AV_CODEC_ID_H264,   MKTAG('a','v','c','1') },
+    { AV_CODEC_ID_MPEG4,  MKTAG('m','p','4','v') },
+    { AV_CODEC_ID_AAC,    MKTAG('m','p','4','a') },
+    { AV_CODEC_ID_AMR_NB, MKTAG('s','a','m','r') },
+    { AV_CODEC_ID_AMR_WB, MKTAG('s','a','w','b') },
+    { AV_CODEC_ID_MOV_TEXT, MKTAG('t','x','3','g') },
+    { AV_CODEC_ID_NONE, 0 },
+};
+
+static const AVCodecTag codec_f4v_tags[] = { // XXX: add GIF/PNG/JPEG?
+    { AV_CODEC_ID_MP3,    MKTAG('.','m','p','3') },
+    { AV_CODEC_ID_AAC,    MKTAG('m','p','4','a') },
+    { AV_CODEC_ID_H264,   MKTAG('a','v','c','1') },
+    { AV_CODEC_ID_VP6F,   MKTAG('V','P','6','F') },
+    { AV_CODEC_ID_NONE, 0 },
+};
+
+static int mov_find_codec_tag(AVFormatContext *s, MOVTrack *track)
+{
+    int tag;
+
+    if (track->mode == MODE_MP4 || track->mode == MODE_PSP)
+        tag = mp4_get_codec_tag(s, track);
+    else if (track->mode == MODE_ISM) {
+        tag = mp4_get_codec_tag(s, track);
+        if (!tag && track->enc->codec_id == AV_CODEC_ID_WMAPRO)
+            tag = MKTAG('w', 'm', 'a', ' ');
+    } else if (track->mode == MODE_IPOD)
+        tag = ipod_get_codec_tag(s, track);
+    else if (track->mode & MODE_3GP)
+        tag = ff_codec_get_tag(codec_3gp_tags, track->enc->codec_id);
+    else if (track->mode & MODE_F4V)
+        tag = ff_codec_get_tag(codec_f4v_tags, track->enc->codec_id);
+    else
+        tag = mov_get_codec_tag(s, track);
+
+    return tag;
+}
+
+/** Write uuid atom.
+ * Needed to make file play in iPods running newest firmware
+ * goes after avcC atom in moov.trak.mdia.minf.stbl.stsd.avc1
+ */
+static int mov_write_uuid_tag_ipod(AVIOContext *pb)
+{
+    avio_wb32(pb, 28);
+    ffio_wfourcc(pb, "uuid");
+    avio_wb32(pb, 0x6b6840f2);
+    avio_wb32(pb, 0x5f244fc5);
+    avio_wb32(pb, 0xba39a51b);
+    avio_wb32(pb, 0xcf0323f3);
+    avio_wb32(pb, 0x0);
+    return 28;
+}
+
+static const uint16_t fiel_data[] = {
+    0x0000, 0x0100, 0x0201, 0x0206, 0x0209, 0x020e
+};
+
+static int mov_write_fiel_tag(AVIOContext *pb, MOVTrack *track)
+{
+    unsigned mov_field_order = 0;
+    if (track->enc->field_order < FF_ARRAY_ELEMS(fiel_data))
+        mov_field_order = fiel_data[track->enc->field_order];
+    else
+        return 0;
+    avio_wb32(pb, 10);
+    ffio_wfourcc(pb, "fiel");
+    avio_wb16(pb, mov_field_order);
+    return 10;
+}
+
+static int mov_write_subtitle_tag(AVIOContext *pb, MOVTrack *track)
+{
+    int64_t pos = avio_tell(pb);
+    avio_wb32(pb, 0);    /* size */
+    avio_wl32(pb, track->tag); // store it byteswapped
+    avio_wb32(pb, 0);    /* Reserved */
+    avio_wb16(pb, 0);    /* Reserved */
+    avio_wb16(pb, 1);    /* Data-reference index */
+
+    if (track->enc->extradata_size)
+        avio_write(pb, track->enc->extradata, track->enc->extradata_size);
+
+    return update_size(pb, pos);
+}
+
+static int mov_write_pasp_tag(AVIOContext *pb, MOVTrack *track)
+{
+    AVRational sar;
+    av_reduce(&sar.num, &sar.den, track->enc->sample_aspect_ratio.num,
+              track->enc->sample_aspect_ratio.den, INT_MAX);
+
+    avio_wb32(pb, 16);
+    ffio_wfourcc(pb, "pasp");
+    avio_wb32(pb, sar.num);
+    avio_wb32(pb, sar.den);
+    return 16;
+}
+
+static int mov_write_video_tag(AVIOContext *pb, MOVTrack *track)
+{
+    int64_t pos = avio_tell(pb);
+    char compressor_name[32] = { 0 };
+
+    avio_wb32(pb, 0); /* size */
+    avio_wl32(pb, track->tag); // store it byteswapped
+    avio_wb32(pb, 0); /* Reserved */
+    avio_wb16(pb, 0); /* Reserved */
+    avio_wb16(pb, 1); /* Data-reference index */
+
+    avio_wb16(pb, 0); /* Codec stream version */
+    avio_wb16(pb, 0); /* Codec stream revision (=0) */
+    if (track->mode == MODE_MOV) {
+        ffio_wfourcc(pb, "FFMP"); /* Vendor */
+        if(track->enc->codec_id == AV_CODEC_ID_RAWVIDEO) {
+            avio_wb32(pb, 0); /* Temporal Quality */
+            avio_wb32(pb, 0x400); /* Spatial Quality = lossless*/
+        } else {
+            avio_wb32(pb, 0x200); /* Temporal Quality = normal */
+            avio_wb32(pb, 0x200); /* Spatial Quality = normal */
+        }
+    } else {
+        avio_wb32(pb, 0); /* Reserved */
+        avio_wb32(pb, 0); /* Reserved */
+        avio_wb32(pb, 0); /* Reserved */
+    }
+    avio_wb16(pb, track->enc->width); /* Video width */
+    avio_wb16(pb, track->height); /* Video height */
+    avio_wb32(pb, 0x00480000); /* Horizontal resolution 72dpi */
+    avio_wb32(pb, 0x00480000); /* Vertical resolution 72dpi */
+    avio_wb32(pb, 0); /* Data size (= 0) */
+    avio_wb16(pb, 1); /* Frame count (= 1) */
+
+    /* FIXME not sure, ISO 14496-1 draft where it shall be set to 0 */
+    if (track->mode == MODE_MOV && track->enc->codec && track->enc->codec->name)
+        av_strlcpy(compressor_name,track->enc->codec->name,32);
+    avio_w8(pb, strlen(compressor_name));
+    avio_write(pb, compressor_name, 31);
+
+    if (track->mode == MODE_MOV && track->enc->bits_per_coded_sample)
+        avio_wb16(pb, track->enc->bits_per_coded_sample);
+    else
+        avio_wb16(pb, 0x18); /* Reserved */
+    avio_wb16(pb, 0xffff); /* Reserved */
+    if(track->tag == MKTAG('m','p','4','v'))
+        mov_write_esds_tag(pb, track);
+    else if(track->enc->codec_id == AV_CODEC_ID_H263)
+        mov_write_d263_tag(pb);
+    else if(track->enc->codec_id == AV_CODEC_ID_AVUI ||
+            track->enc->codec_id == AV_CODEC_ID_SVQ3) {
+        mov_write_extradata_tag(pb, track);
+        avio_wb32(pb, 0);
+    } else if(track->enc->codec_id == AV_CODEC_ID_DNXHD)
+        mov_write_avid_tag(pb, track);
+    else if(track->enc->codec_id == AV_CODEC_ID_H264) {
+        mov_write_avcc_tag(pb, track);
+        if(track->mode == MODE_IPOD)
+            mov_write_uuid_tag_ipod(pb);
+    } else if (track->enc->codec_id == AV_CODEC_ID_VC1 && track->vos_len > 0)
+        mov_write_dvc1_tag(pb, track);
+    else if (track->vos_len > 0)
+        mov_write_glbl_tag(pb, track);
+
+    if (track->enc->codec_id != AV_CODEC_ID_H264 &&
+        track->enc->codec_id != AV_CODEC_ID_MPEG4 &&
+        track->enc->codec_id != AV_CODEC_ID_DNXHD)
+        if (track->enc->field_order != AV_FIELD_UNKNOWN)
+            mov_write_fiel_tag(pb, track);
+
+    if (track->enc->sample_aspect_ratio.den && track->enc->sample_aspect_ratio.num &&
+        track->enc->sample_aspect_ratio.den != track->enc->sample_aspect_ratio.num) {
+        mov_write_pasp_tag(pb, track);
+    }
+
+    return update_size(pb, pos);
+}
+
+static int mov_write_tmcd_tag(AVIOContext *pb, MOVTrack *track)
+{
+    int64_t pos = avio_tell(pb);
+    int frame_duration = av_rescale(track->timescale, track->enc->time_base.num, track->enc->time_base.den);
+    int nb_frames = 1.0/av_q2d(track->enc->time_base) + 0.5;
+
+    if (nb_frames > 255) {
+        av_log(NULL, AV_LOG_ERROR, "fps %d is too large\n", nb_frames);
+        return AVERROR(EINVAL);
+    }
+
+    avio_wb32(pb, 0); /* size */
+    ffio_wfourcc(pb, "tmcd");               /* Data format */
+    avio_wb32(pb, 0);                       /* Reserved */
+    avio_wb32(pb, 1);                       /* Data reference index */
+    avio_wb32(pb, 0);                       /* Flags */
+    avio_wb32(pb, track->timecode_flags);   /* Flags (timecode) */
+    avio_wb32(pb, track->timescale);        /* Timescale */
+    avio_wb32(pb, frame_duration);          /* Frame duration */
+    avio_w8(pb, nb_frames);                 /* Number of frames */
+    avio_wb24(pb, 0);                       /* Reserved */
+    /* TODO: source reference string */
+    return update_size(pb, pos);
+}
+
+static int mov_write_rtp_tag(AVIOContext *pb, MOVTrack *track)
+{
+    int64_t pos = avio_tell(pb);
+    avio_wb32(pb, 0); /* size */
+    ffio_wfourcc(pb, "rtp ");
+    avio_wb32(pb, 0); /* Reserved */
+    avio_wb16(pb, 0); /* Reserved */
+    avio_wb16(pb, 1); /* Data-reference index */
+
+    avio_wb16(pb, 1); /* Hint track version */
+    avio_wb16(pb, 1); /* Highest compatible version */
+    avio_wb32(pb, track->max_packet_size); /* Max packet size */
+
+    avio_wb32(pb, 12); /* size */
+    ffio_wfourcc(pb, "tims");
+    avio_wb32(pb, track->timescale);
+
+    return update_size(pb, pos);
+}
+
+static int mov_write_stsd_tag(AVIOContext *pb, MOVTrack *track)
+{
+    int64_t pos = avio_tell(pb);
+    avio_wb32(pb, 0); /* size */
+    ffio_wfourcc(pb, "stsd");
+    avio_wb32(pb, 0); /* version & flags */
+    avio_wb32(pb, 1); /* entry count */
+    if (track->enc->codec_type == AVMEDIA_TYPE_VIDEO)
+        mov_write_video_tag(pb, track);
+    else if (track->enc->codec_type == AVMEDIA_TYPE_AUDIO)
+        mov_write_audio_tag(pb, track);
+    else if (track->enc->codec_type == AVMEDIA_TYPE_SUBTITLE)
+        mov_write_subtitle_tag(pb, track);
+    else if (track->enc->codec_tag == MKTAG('r','t','p',' '))
+        mov_write_rtp_tag(pb, track);
+    else if (track->enc->codec_tag == MKTAG('t','m','c','d'))
+        mov_write_tmcd_tag(pb, track);
+    return update_size(pb, pos);
+}
+
+static int mov_write_ctts_tag(AVIOContext *pb, MOVTrack *track)
+{
+    MOVStts *ctts_entries;
+    uint32_t entries = 0;
+    uint32_t atom_size;
+    int i;
+
+    ctts_entries = av_malloc((track->entry + 1) * sizeof(*ctts_entries)); /* worst case */
+    ctts_entries[0].count = 1;
+    ctts_entries[0].duration = track->cluster[0].cts;
+    for (i=1; i<track->entry; i++) {
+        if (track->cluster[i].cts == ctts_entries[entries].duration) {
+            ctts_entries[entries].count++; /* compress */
+        } else {
+            entries++;
+            ctts_entries[entries].duration = track->cluster[i].cts;
+            ctts_entries[entries].count = 1;
+        }
+    }
+    entries++; /* last one */
+    atom_size = 16 + (entries * 8);
+    avio_wb32(pb, atom_size); /* size */
+    ffio_wfourcc(pb, "ctts");
+    avio_wb32(pb, 0); /* version & flags */
+    avio_wb32(pb, entries); /* entry count */
+    for (i=0; i<entries; i++) {
+        avio_wb32(pb, ctts_entries[i].count);
+        avio_wb32(pb, ctts_entries[i].duration);
+    }
+    av_free(ctts_entries);
+    return atom_size;
+}
+
+/* Time to sample atom */
+static int mov_write_stts_tag(AVIOContext *pb, MOVTrack *track)
+{
+    MOVStts *stts_entries;
+    uint32_t entries = -1;
+    uint32_t atom_size;
+    int i;
+
+    if (track->enc->codec_type == AVMEDIA_TYPE_AUDIO && !track->audio_vbr) {
+        stts_entries = av_malloc(sizeof(*stts_entries)); /* one entry */
+        stts_entries[0].count = track->sample_count;
+        stts_entries[0].duration = 1;
+        entries = 1;
+    } else {
+        stts_entries = track->entry ?
+                       av_malloc(track->entry * sizeof(*stts_entries)) : /* worst case */
+                       NULL;
+        for (i=0; i<track->entry; i++) {
+            int duration = get_cluster_duration(track, i);
+            if (i && duration == stts_entries[entries].duration) {
+                stts_entries[entries].count++; /* compress */
+            } else {
+                entries++;
+                stts_entries[entries].duration = duration;
+                stts_entries[entries].count = 1;
+            }
+        }
+        entries++; /* last one */
+    }
+    atom_size = 16 + (entries * 8);
+    avio_wb32(pb, atom_size); /* size */
+    ffio_wfourcc(pb, "stts");
+    avio_wb32(pb, 0); /* version & flags */
+    avio_wb32(pb, entries); /* entry count */
+    for (i=0; i<entries; i++) {
+        avio_wb32(pb, stts_entries[i].count);
+        avio_wb32(pb, stts_entries[i].duration);
+    }
+    av_free(stts_entries);
+    return atom_size;
+}
+
+static int mov_write_dref_tag(AVIOContext *pb)
+{
+    avio_wb32(pb, 28); /* size */
+    ffio_wfourcc(pb, "dref");
+    avio_wb32(pb, 0); /* version & flags */
+    avio_wb32(pb, 1); /* entry count */
+
+    avio_wb32(pb, 0xc); /* size */
+    //FIXME add the alis and rsrc atom
+    ffio_wfourcc(pb, "url ");
+    avio_wb32(pb, 1); /* version & flags */
+
+    return 28;
+}
+
+static int mov_write_stbl_tag(AVIOContext *pb, MOVTrack *track)
+{
+    int64_t pos = avio_tell(pb);
+    avio_wb32(pb, 0); /* size */
+    ffio_wfourcc(pb, "stbl");
+    mov_write_stsd_tag(pb, track);
+    mov_write_stts_tag(pb, track);
+    if ((track->enc->codec_type == AVMEDIA_TYPE_VIDEO ||
+         track->enc->codec_tag == MKTAG('r','t','p',' ')) &&
+        track->has_keyframes && track->has_keyframes < track->entry)
+        mov_write_stss_tag(pb, track, MOV_SYNC_SAMPLE);
+    if (track->mode == MODE_MOV && track->flags & MOV_TRACK_STPS)
+        mov_write_stss_tag(pb, track, MOV_PARTIAL_SYNC_SAMPLE);
+    if (track->enc->codec_type == AVMEDIA_TYPE_VIDEO &&
+        track->flags & MOV_TRACK_CTTS)
+        mov_write_ctts_tag(pb, track);
+    mov_write_stsc_tag(pb, track);
+    mov_write_stsz_tag(pb, track);
+    mov_write_stco_tag(pb, track);
+    return update_size(pb, pos);
+}
+
+static int mov_write_dinf_tag(AVIOContext *pb)
+{
+    int64_t pos = avio_tell(pb);
+    avio_wb32(pb, 0); /* size */
+    ffio_wfourcc(pb, "dinf");
+    mov_write_dref_tag(pb);
+    return update_size(pb, pos);
+}
+
+static int mov_write_nmhd_tag(AVIOContext *pb)
+{
+    avio_wb32(pb, 12);
+    ffio_wfourcc(pb, "nmhd");
+    avio_wb32(pb, 0);
+    return 12;
+}
+
+static int mov_write_tcmi_tag(AVIOContext *pb, MOVTrack *track)
+{
+    int64_t pos = avio_tell(pb);
+    const char *font = "Lucida Grande";
+    avio_wb32(pb, 0);                   /* size */
+    ffio_wfourcc(pb, "tcmi");           /* timecode media information atom */
+    avio_wb32(pb, 0);                   /* version & flags */
+    avio_wb16(pb, 0);                   /* text font */
+    avio_wb16(pb, 0);                   /* text face */
+    avio_wb16(pb, 12);                  /* text size */
+    avio_wb16(pb, 0);                   /* (unknown, not in the QT specs...) */
+    avio_wb16(pb, 0x0000);              /* text color (red) */
+    avio_wb16(pb, 0x0000);              /* text color (green) */
+    avio_wb16(pb, 0x0000);              /* text color (blue) */
+    avio_wb16(pb, 0xffff);              /* background color (red) */
+    avio_wb16(pb, 0xffff);              /* background color (green) */
+    avio_wb16(pb, 0xffff);              /* background color (blue) */
+    avio_w8(pb, strlen(font));          /* font len (part of the pascal string) */
+    avio_write(pb, font, strlen(font)); /* font name */
+    return update_size(pb, pos);
+}
+
+static int mov_write_gmhd_tag(AVIOContext *pb, MOVTrack *track)
+{
+    int64_t pos = avio_tell(pb);
+    avio_wb32(pb, 0);      /* size */
+    ffio_wfourcc(pb, "gmhd");
+    avio_wb32(pb, 0x18);   /* gmin size */
+    ffio_wfourcc(pb, "gmin");/* generic media info */
+    avio_wb32(pb, 0);      /* version & flags */
+    avio_wb16(pb, 0x40);   /* graphics mode = */
+    avio_wb16(pb, 0x8000); /* opColor (r?) */
+    avio_wb16(pb, 0x8000); /* opColor (g?) */
+    avio_wb16(pb, 0x8000); /* opColor (b?) */
+    avio_wb16(pb, 0);      /* balance */
+    avio_wb16(pb, 0);      /* reserved */
+
+    /*
+     * This special text atom is required for
+     * Apple Quicktime chapters. The contents
+     * don't appear to be documented, so the
+     * bytes are copied verbatim.
+     */
+    if (track->tag != MKTAG('c','6','0','8')) {
+    avio_wb32(pb, 0x2C);   /* size */
+    ffio_wfourcc(pb, "text");
+    avio_wb16(pb, 0x01);
+    avio_wb32(pb, 0x00);
+    avio_wb32(pb, 0x00);
+    avio_wb32(pb, 0x00);
+    avio_wb32(pb, 0x01);
+    avio_wb32(pb, 0x00);
+    avio_wb32(pb, 0x00);
+    avio_wb32(pb, 0x00);
+    avio_wb32(pb, 0x00004000);
+    avio_wb16(pb, 0x0000);
+    }
+
+    if (track->enc->codec_tag == MKTAG('t','m','c','d')) {
+        int64_t tmcd_pos = avio_tell(pb);
+        avio_wb32(pb, 0); /* size */
+        ffio_wfourcc(pb, "tmcd");
+        mov_write_tcmi_tag(pb, track);
+        update_size(pb, tmcd_pos);
+    }
+    return update_size(pb, pos);
+}
+
+static int mov_write_smhd_tag(AVIOContext *pb)
+{
+    avio_wb32(pb, 16); /* size */
+    ffio_wfourcc(pb, "smhd");
+    avio_wb32(pb, 0); /* version & flags */
+    avio_wb16(pb, 0); /* reserved (balance, normally = 0) */
+    avio_wb16(pb, 0); /* reserved */
+    return 16;
+}
+
+static int mov_write_vmhd_tag(AVIOContext *pb)
+{
+    avio_wb32(pb, 0x14); /* size (always 0x14) */
+    ffio_wfourcc(pb, "vmhd");
+    avio_wb32(pb, 0x01); /* version & flags */
+    avio_wb64(pb, 0); /* reserved (graphics mode = copy) */
+    return 0x14;
+}
+
+static int mov_write_hdlr_tag(AVIOContext *pb, MOVTrack *track)
+{
+    const char *hdlr, *descr = NULL, *hdlr_type = NULL;
+    int64_t pos = avio_tell(pb);
+
+    if (!track) { /* no media --> data handler */
+        hdlr = "dhlr";
+        hdlr_type = "url ";
+        descr = "DataHandler";
+    } else {
+        hdlr = (track->mode == MODE_MOV) ? "mhlr" : "\0\0\0\0";
+        if (track->enc->codec_type == AVMEDIA_TYPE_VIDEO) {
+            hdlr_type = "vide";
+            descr = "VideoHandler";
+        } else if (track->enc->codec_type == AVMEDIA_TYPE_AUDIO) {
+            hdlr_type = "soun";
+            descr = "SoundHandler";
+        } else if (track->enc->codec_type == AVMEDIA_TYPE_SUBTITLE) {
+            if (track->tag == MKTAG('c','6','0','8')) {
+                hdlr_type = "clcp";
+                descr = "ClosedCaptionHandler";
+            } else {
+            if (track->tag == MKTAG('t','x','3','g')) hdlr_type = "sbtl";
+            else                                      hdlr_type = "text";
+            descr = "SubtitleHandler";
+            }
+        } else if (track->enc->codec_tag == MKTAG('t','m','c','d')) {
+            hdlr_type = "tmcd";
+            descr = "TimeCodeHandler";
+        } else if (track->enc->codec_tag == MKTAG('r','t','p',' ')) {
+            hdlr_type = "hint";
+            descr = "HintHandler";
+        } else {
+            hdlr = "dhlr";
+            hdlr_type = "url ";
+            descr = "DataHandler";
+        }
+    }
+
+    avio_wb32(pb, 0); /* size */
+    ffio_wfourcc(pb, "hdlr");
+    avio_wb32(pb, 0); /* Version & flags */
+    avio_write(pb, hdlr, 4); /* handler */
+    ffio_wfourcc(pb, hdlr_type); /* handler type */
+    avio_wb32(pb ,0); /* reserved */
+    avio_wb32(pb ,0); /* reserved */
+    avio_wb32(pb ,0); /* reserved */
+    if (!track || track->mode == MODE_MOV)
+        avio_w8(pb, strlen(descr)); /* pascal string */
+    avio_write(pb, descr, strlen(descr)); /* handler description */
+    if (track && track->mode != MODE_MOV)
+        avio_w8(pb, 0); /* c string */
+    return update_size(pb, pos);
+}
+
+static int mov_write_hmhd_tag(AVIOContext *pb)
+{
+    /* This atom must be present, but leaving the values at zero
+     * seems harmless. */
+    avio_wb32(pb, 28); /* size */
+    ffio_wfourcc(pb, "hmhd");
+    avio_wb32(pb, 0); /* version, flags */
+    avio_wb16(pb, 0); /* maxPDUsize */
+    avio_wb16(pb, 0); /* avgPDUsize */
+    avio_wb32(pb, 0); /* maxbitrate */
+    avio_wb32(pb, 0); /* avgbitrate */
+    avio_wb32(pb, 0); /* reserved */
+    return 28;
+}
+
+static int mov_write_minf_tag(AVIOContext *pb, MOVTrack *track)
+{
+    int64_t pos = avio_tell(pb);
+    avio_wb32(pb, 0); /* size */
+    ffio_wfourcc(pb, "minf");
+    if(track->enc->codec_type == AVMEDIA_TYPE_VIDEO)
+        mov_write_vmhd_tag(pb);
+    else if (track->enc->codec_type == AVMEDIA_TYPE_AUDIO)
+        mov_write_smhd_tag(pb);
+    else if (track->enc->codec_type == AVMEDIA_TYPE_SUBTITLE) {
+        if (track->tag == MKTAG('t','e','x','t') || track->tag == MKTAG('c','6','0','8')) {
+            mov_write_gmhd_tag(pb, track);
+        } else {
+            mov_write_nmhd_tag(pb);
+        }
+    } else if (track->tag == MKTAG('t','m','c','d')) {
+        mov_write_gmhd_tag(pb, track);
+    } else if (track->tag == MKTAG('r','t','p',' ')) {
+        mov_write_hmhd_tag(pb);
+    }
+    if (track->mode == MODE_MOV) /* FIXME: Why do it for MODE_MOV only ? */
+        mov_write_hdlr_tag(pb, NULL);
+    mov_write_dinf_tag(pb);
+    mov_write_stbl_tag(pb, track);
+    return update_size(pb, pos);
+}
+
+static int mov_write_mdhd_tag(AVIOContext *pb, MOVTrack *track)
+{
+    int version = track->track_duration < INT32_MAX ? 0 : 1;
+
+    if (track->mode == MODE_ISM)
+        version = 1;
+
+    (version == 1) ? avio_wb32(pb, 44) : avio_wb32(pb, 32); /* size */
+    ffio_wfourcc(pb, "mdhd");
+    avio_w8(pb, version);
+    avio_wb24(pb, 0); /* flags */
+    if (version == 1) {
+        avio_wb64(pb, track->time);
+        avio_wb64(pb, track->time);
+    } else {
+        avio_wb32(pb, track->time); /* creation time */
+        avio_wb32(pb, track->time); /* modification time */
+    }
+    avio_wb32(pb, track->timescale); /* time scale (sample rate for audio) */
+    if (!track->entry)
+        (version == 1) ? avio_wb64(pb, UINT64_C(0xffffffffffffffff)) : avio_wb32(pb, 0xffffffff);
+    else
+        (version == 1) ? avio_wb64(pb, track->track_duration) : avio_wb32(pb, track->track_duration); /* duration */
+    avio_wb16(pb, track->language); /* language */
+    avio_wb16(pb, 0); /* reserved (quality) */
+
+    if(version!=0 && track->mode == MODE_MOV){
+        av_log(NULL, AV_LOG_ERROR,
+            "FATAL error, file duration too long for timebase, this file will not be\n"
+            "playable with quicktime. Choose a different timebase or a different\n"
+            "container format\n");
+    }
+
+    return 32;
+}
+
+static int mov_write_mdia_tag(AVIOContext *pb, MOVTrack *track)
+{
+    int64_t pos = avio_tell(pb);
+    avio_wb32(pb, 0); /* size */
+    ffio_wfourcc(pb, "mdia");
+    mov_write_mdhd_tag(pb, track);
+    mov_write_hdlr_tag(pb, track);
+    mov_write_minf_tag(pb, track);
+    return update_size(pb, pos);
+}
+
+/* transformation matrix
+     |a  b  u|
+     |c  d  v|
+     |tx ty w| */
+static void write_matrix(AVIOContext *pb, int16_t a, int16_t b, int16_t c,
+                         int16_t d, int16_t tx, int16_t ty)
+{
+    avio_wb32(pb, a << 16);  /* 16.16 format */
+    avio_wb32(pb, b << 16);  /* 16.16 format */
+    avio_wb32(pb, 0);        /* u in 2.30 format */
+    avio_wb32(pb, c << 16);  /* 16.16 format */
+    avio_wb32(pb, d << 16);  /* 16.16 format */
+    avio_wb32(pb, 0);        /* v in 2.30 format */
+    avio_wb32(pb, tx << 16); /* 16.16 format */
+    avio_wb32(pb, ty << 16); /* 16.16 format */
+    avio_wb32(pb, 1 << 30);  /* w in 2.30 format */
+}
+
+static int mov_write_tkhd_tag(AVIOContext *pb, MOVTrack *track, AVStream *st)
+{
+    int64_t duration = av_rescale_rnd(track->track_duration, MOV_TIMESCALE,
+                                      track->timescale, AV_ROUND_UP);
+    int version = duration < INT32_MAX ? 0 : 1;
+    int rotation = 0;
+
+    if (track->mode == MODE_ISM)
+        version = 1;
+
+    (version == 1) ? avio_wb32(pb, 104) : avio_wb32(pb, 92); /* size */
+    ffio_wfourcc(pb, "tkhd");
+    avio_w8(pb, version);
+    avio_wb24(pb, track->secondary ? 0x2 : 0xf); /* flags (first track enabled) */
+    if (version == 1) {
+        avio_wb64(pb, track->time);
+        avio_wb64(pb, track->time);
+    } else {
+        avio_wb32(pb, track->time); /* creation time */
+        avio_wb32(pb, track->time); /* modification time */
+    }
+    avio_wb32(pb, track->track_id); /* track-id */
+    avio_wb32(pb, 0); /* reserved */
+    if (!track->entry)
+        (version == 1) ? avio_wb64(pb, UINT64_C(0xffffffffffffffff)) : avio_wb32(pb, 0xffffffff);
+    else
+        (version == 1) ? avio_wb64(pb, duration) : avio_wb32(pb, duration);
+
+    avio_wb32(pb, 0); /* reserved */
+    avio_wb32(pb, 0); /* reserved */
+    avio_wb16(pb, 0); /* layer */
+    avio_wb16(pb, st ? st->codec->codec_type : 0); /* alternate group) */
+    /* Volume, only for audio */
+    if(track->enc->codec_type == AVMEDIA_TYPE_AUDIO)
+        avio_wb16(pb, 0x0100);
+    else
+        avio_wb16(pb, 0);
+    avio_wb16(pb, 0); /* reserved */
+
+    /* Matrix structure */
+    if (st && st->metadata) {
+        AVDictionaryEntry *rot = av_dict_get(st->metadata, "rotate", NULL, 0);
+        rotation = (rot && rot->value) ? atoi(rot->value) : 0;
+    }
+    if (rotation == 90) {
+        write_matrix(pb,  0,  1, -1,  0, track->enc->height, 0);
+    } else if (rotation == 180) {
+        write_matrix(pb, -1,  0,  0, -1, track->enc->width, track->enc->height);
+    } else if (rotation == 270) {
+        write_matrix(pb,  0, -1,  1,  0, 0, track->enc->width);
+    } else {
+        write_matrix(pb,  1,  0,  0,  1, 0, 0);
+    }
+    /* Track width and height, for visual only */
+    if(st && (track->enc->codec_type == AVMEDIA_TYPE_VIDEO ||
+              track->enc->codec_type == AVMEDIA_TYPE_SUBTITLE)) {
+        if(track->mode == MODE_MOV) {
+            avio_wb32(pb, track->enc->width << 16);
+            avio_wb32(pb, track->height << 16);
+        } else {
+            double sample_aspect_ratio = av_q2d(st->sample_aspect_ratio);
+            if(!sample_aspect_ratio || track->height != track->enc->height)
+                sample_aspect_ratio = 1;
+            avio_wb32(pb, sample_aspect_ratio * track->enc->width*0x10000);
+            avio_wb32(pb, track->height*0x10000);
+        }
+    }
+    else {
+        avio_wb32(pb, 0);
+        avio_wb32(pb, 0);
+    }
+    return 0x5c;
+}
+
+static int mov_write_tapt_tag(AVIOContext *pb, MOVTrack *track)
+{
+    int32_t width = av_rescale(track->enc->sample_aspect_ratio.num, track->enc->width,
+                               track->enc->sample_aspect_ratio.den);
+
+    int64_t pos = avio_tell(pb);
+
+    avio_wb32(pb, 0); /* size */
+    ffio_wfourcc(pb, "tapt");
+
+    avio_wb32(pb, 20);
+    ffio_wfourcc(pb, "clef");
+    avio_wb32(pb, 0);
+    avio_wb32(pb, width << 16);
+    avio_wb32(pb, track->enc->height << 16);
+
+    avio_wb32(pb, 20);
+    ffio_wfourcc(pb, "prof");
+    avio_wb32(pb, 0);
+    avio_wb32(pb, width << 16);
+    avio_wb32(pb, track->enc->height << 16);
+
+    avio_wb32(pb, 20);
+    ffio_wfourcc(pb, "enof");
+    avio_wb32(pb, 0);
+    avio_wb32(pb, track->enc->width << 16);
+    avio_wb32(pb, track->enc->height << 16);
+
+    return update_size(pb, pos);
+}
+
+// This box seems important for the psp playback ... without it the movie seems to hang
+static int mov_write_edts_tag(AVIOContext *pb, MOVTrack *track)
+{
+    int64_t duration = av_rescale_rnd(track->track_duration, MOV_TIMESCALE,
+                                      track->timescale, AV_ROUND_UP);
+    int version = duration < INT32_MAX ? 0 : 1;
+    int entry_size, entry_count, size;
+    int64_t delay, start_ct = track->cluster[0].cts;
+    delay = av_rescale_rnd(track->cluster[0].dts + start_ct, MOV_TIMESCALE,
+                           track->timescale, AV_ROUND_DOWN);
+    version |= delay < INT32_MAX ? 0 : 1;
+
+    entry_size = (version == 1) ? 20 : 12;
+    entry_count = 1 + (delay > 0);
+    size = 24 + entry_count * entry_size;
+
+    /* write the atom data */
+    avio_wb32(pb, size);
+    ffio_wfourcc(pb, "edts");
+    avio_wb32(pb, size - 8);
+    ffio_wfourcc(pb, "elst");
+    avio_w8(pb, version);
+    avio_wb24(pb, 0); /* flags */
+
+    avio_wb32(pb, entry_count);
+    if (delay > 0) { /* add an empty edit to delay presentation */
+        if (version == 1) {
+            avio_wb64(pb, delay);
+            avio_wb64(pb, -1);
+        } else {
+            avio_wb32(pb, delay);
+            avio_wb32(pb, -1);
+        }
+        avio_wb32(pb, 0x00010000);
+    } else {
+        av_assert0(av_rescale_rnd(track->cluster[0].dts, MOV_TIMESCALE, track->timescale, AV_ROUND_DOWN) <= 0);
+        start_ct  = -FFMIN(track->cluster[0].dts, 0); //FFMIN needed due to rounding
+        duration += delay;
+    }
+
+    /* duration */
+    if (version == 1) {
+        avio_wb64(pb, duration);
+        avio_wb64(pb, start_ct);
+    } else {
+        avio_wb32(pb, duration);
+        avio_wb32(pb, start_ct);
+    }
+    avio_wb32(pb, 0x00010000);
+    return size;
+}
+
+static int mov_write_tref_tag(AVIOContext *pb, MOVTrack *track)
+{
+    avio_wb32(pb, 20);   // size
+    ffio_wfourcc(pb, "tref");
+    avio_wb32(pb, 12);   // size (subatom)
+    avio_wl32(pb, track->tref_tag);
+    avio_wb32(pb, track->tref_id);
+    return 20;
+}
+
+// goes at the end of each track!  ... Critical for PSP playback ("Incompatible data" without it)
+static int mov_write_uuid_tag_psp(AVIOContext *pb, MOVTrack *mov)
+{
+    avio_wb32(pb, 0x34); /* size ... reports as 28 in mp4box! */
+    ffio_wfourcc(pb, "uuid");
+    ffio_wfourcc(pb, "USMT");
+    avio_wb32(pb, 0x21d24fce);
+    avio_wb32(pb, 0xbb88695c);
+    avio_wb32(pb, 0xfac9c740);
+    avio_wb32(pb, 0x1c);     // another size here!
+    ffio_wfourcc(pb, "MTDT");
+    avio_wb32(pb, 0x00010012);
+    avio_wb32(pb, 0x0a);
+    avio_wb32(pb, 0x55c40000);
+    avio_wb32(pb, 0x1);
+    avio_wb32(pb, 0x0);
+    return 0x34;
+}
+
+static int mov_write_udta_sdp(AVIOContext *pb, MOVTrack *track)
+{
+
+    AVFormatContext *ctx = track->rtp_ctx;
+    char buf[1000] = "";
+    int len;
+
+    ff_sdp_write_media(buf, sizeof(buf), ctx->streams[0], track->src_track,
+                       NULL, NULL, 0, 0, ctx);
+    av_strlcatf(buf, sizeof(buf), "a=control:streamid=%d\r\n", track->track_id);
+    len = strlen(buf);
+
+    avio_wb32(pb, len + 24);
+    ffio_wfourcc(pb, "udta");
+    avio_wb32(pb, len + 16);
+    ffio_wfourcc(pb, "hnti");
+    avio_wb32(pb, len + 8);
+    ffio_wfourcc(pb, "sdp ");
+    avio_write(pb, buf, len);
+    return len + 24;
+}
+
+static int mov_write_trak_tag(AVIOContext *pb, MOVMuxContext *mov,
+                              MOVTrack *track, AVStream *st)
+{
+    int64_t pos = avio_tell(pb);
+    avio_wb32(pb, 0); /* size */
+    ffio_wfourcc(pb, "trak");
+    mov_write_tkhd_tag(pb, track, st);
+    if (supports_edts(mov))
+        mov_write_edts_tag(pb, track);  // PSP Movies and several other cases require edts box
+    if (track->tref_tag)
+        mov_write_tref_tag(pb, track);
+    mov_write_mdia_tag(pb, track);
+    if (track->mode == MODE_PSP)
+        mov_write_uuid_tag_psp(pb,track);  // PSP Movies require this uuid box
+    if (track->tag == MKTAG('r','t','p',' '))
+        mov_write_udta_sdp(pb, track);
+    if (track->enc->codec_type == AVMEDIA_TYPE_VIDEO && track->mode == MODE_MOV) {
+        double sample_aspect_ratio = av_q2d(st->sample_aspect_ratio);
+        if (st->sample_aspect_ratio.num && 1.0 != sample_aspect_ratio)
+            mov_write_tapt_tag(pb, track);
+    };
+    return update_size(pb, pos);
+}
+
+static int mov_write_iods_tag(AVIOContext *pb, MOVMuxContext *mov)
+{
+    int i, has_audio = 0, has_video = 0;
+    int64_t pos = avio_tell(pb);
+    int audio_profile = mov->iods_audio_profile;
+    int video_profile = mov->iods_video_profile;
+    for (i = 0; i < mov->nb_streams; i++) {
+        if(mov->tracks[i].entry > 0) {
+            has_audio |= mov->tracks[i].enc->codec_type == AVMEDIA_TYPE_AUDIO;
+            has_video |= mov->tracks[i].enc->codec_type == AVMEDIA_TYPE_VIDEO;
+        }
+    }
+    if (audio_profile < 0)
+        audio_profile = 0xFF - has_audio;
+    if (video_profile < 0)
+        video_profile = 0xFF - has_video;
+    avio_wb32(pb, 0x0); /* size */
+    ffio_wfourcc(pb, "iods");
+    avio_wb32(pb, 0);    /* version & flags */
+    put_descr(pb, 0x10, 7);
+    avio_wb16(pb, 0x004f);
+    avio_w8(pb, 0xff);
+    avio_w8(pb, 0xff);
+    avio_w8(pb, audio_profile);
+    avio_w8(pb, video_profile);
+    avio_w8(pb, 0xff);
+    return update_size(pb, pos);
+}
+
+static int mov_write_trex_tag(AVIOContext *pb, MOVTrack *track)
+{
+    avio_wb32(pb, 0x20); /* size */
+    ffio_wfourcc(pb, "trex");
+    avio_wb32(pb, 0);   /* version & flags */
+    avio_wb32(pb, track->track_id); /* track ID */
+    avio_wb32(pb, 1);   /* default sample description index */
+    avio_wb32(pb, 0);   /* default sample duration */
+    avio_wb32(pb, 0);   /* default sample size */
+    avio_wb32(pb, 0);   /* default sample flags */
+    return 0;
+}
+
+static int mov_write_mvex_tag(AVIOContext *pb, MOVMuxContext *mov)
+{
+    int64_t pos = avio_tell(pb);
+    int i;
+    avio_wb32(pb, 0x0); /* size */
+    ffio_wfourcc(pb, "mvex");
+    for (i = 0; i < mov->nb_streams; i++)
+        mov_write_trex_tag(pb, &mov->tracks[i]);
+    return update_size(pb, pos);
+}
+
+static int mov_write_mvhd_tag(AVIOContext *pb, MOVMuxContext *mov)
+{
+    int max_track_id = 1, i;
+    int64_t max_track_len_temp, max_track_len = 0;
+    int version;
+
+    for (i=0; i<mov->nb_streams; i++) {
+        if(mov->tracks[i].entry > 0) {
+            max_track_len_temp = av_rescale_rnd(mov->tracks[i].track_duration,
+                                                MOV_TIMESCALE,
+                                                mov->tracks[i].timescale,
+                                                AV_ROUND_UP);
+            if (max_track_len < max_track_len_temp)
+                max_track_len = max_track_len_temp;
+            if (max_track_id < mov->tracks[i].track_id)
+                max_track_id = mov->tracks[i].track_id;
+        }
+    }
+
+    version = max_track_len < UINT32_MAX ? 0 : 1;
+    (version == 1) ? avio_wb32(pb, 120) : avio_wb32(pb, 108); /* size */
+    ffio_wfourcc(pb, "mvhd");
+    avio_w8(pb, version);
+    avio_wb24(pb, 0); /* flags */
+    if (version == 1) {
+        avio_wb64(pb, mov->time);
+        avio_wb64(pb, mov->time);
+    } else {
+        avio_wb32(pb, mov->time); /* creation time */
+        avio_wb32(pb, mov->time); /* modification time */
+    }
+    avio_wb32(pb, MOV_TIMESCALE);
+    (version == 1) ? avio_wb64(pb, max_track_len) : avio_wb32(pb, max_track_len); /* duration of longest track */
+
+    avio_wb32(pb, 0x00010000); /* reserved (preferred rate) 1.0 = normal */
+    avio_wb16(pb, 0x0100); /* reserved (preferred volume) 1.0 = normal */
+    avio_wb16(pb, 0); /* reserved */
+    avio_wb32(pb, 0); /* reserved */
+    avio_wb32(pb, 0); /* reserved */
+
+    /* Matrix structure */
+    write_matrix(pb, 1, 0, 0, 1, 0, 0);
+
+    avio_wb32(pb, 0); /* reserved (preview time) */
+    avio_wb32(pb, 0); /* reserved (preview duration) */
+    avio_wb32(pb, 0); /* reserved (poster time) */
+    avio_wb32(pb, 0); /* reserved (selection time) */
+    avio_wb32(pb, 0); /* reserved (selection duration) */
+    avio_wb32(pb, 0); /* reserved (current time) */
+    avio_wb32(pb, max_track_id + 1); /* Next track id */
+    return 0x6c;
+}
+
+static int mov_write_itunes_hdlr_tag(AVIOContext *pb, MOVMuxContext *mov,
+                                     AVFormatContext *s)
+{
+    avio_wb32(pb, 33); /* size */
+    ffio_wfourcc(pb, "hdlr");
+    avio_wb32(pb, 0);
+    avio_wb32(pb, 0);
+    ffio_wfourcc(pb, "mdir");
+    ffio_wfourcc(pb, "appl");
+    avio_wb32(pb, 0);
+    avio_wb32(pb, 0);
+    avio_w8(pb, 0);
+    return 33;
+}
+
+/* helper function to write a data tag with the specified string as data */
+static int mov_write_string_data_tag(AVIOContext *pb, const char *data, int lang, int long_style)
+{
+    if(long_style){
+        int size = 16 + strlen(data);
+        avio_wb32(pb, size); /* size */
+        ffio_wfourcc(pb, "data");
+        avio_wb32(pb, 1);
+        avio_wb32(pb, 0);
+        avio_write(pb, data, strlen(data));
+        return size;
+    }else{
+        if (!lang)
+            lang = ff_mov_iso639_to_lang("und", 1);
+        avio_wb16(pb, strlen(data)); /* string length */
+        avio_wb16(pb, lang);
+        avio_write(pb, data, strlen(data));
+        return strlen(data) + 4;
+    }
+}
+
+static int mov_write_string_tag(AVIOContext *pb, const char *name, const char *value, int lang, int long_style){
+    int size = 0;
+    if (value && value[0]) {
+        int64_t pos = avio_tell(pb);
+        avio_wb32(pb, 0); /* size */
+        ffio_wfourcc(pb, name);
+        mov_write_string_data_tag(pb, value, lang, long_style);
+        size = update_size(pb, pos);
+    }
+    return size;
+}
+
+static int mov_write_string_metadata(AVFormatContext *s, AVIOContext *pb,
+                                     const char *name, const char *tag,
+                                     int long_style)
+{
+    int l, lang = 0, len, len2;
+    AVDictionaryEntry *t, *t2 = NULL;
+    char tag2[16];
+
+    if (!(t = av_dict_get(s->metadata, tag, NULL, 0)))
+        return 0;
+
+    len = strlen(t->key);
+    snprintf(tag2, sizeof(tag2), "%s-", tag);
+    while ((t2 = av_dict_get(s->metadata, tag2, t2, AV_DICT_IGNORE_SUFFIX))) {
+        len2 = strlen(t2->key);
+        if (len2 == len+4 && !strcmp(t->value, t2->value)
+            && (l=ff_mov_iso639_to_lang(&t2->key[len2-3], 1)) >= 0) {
+            lang = l;
+            break;
+        }
+    }
+    return mov_write_string_tag(pb, name, t->value, lang, long_style);
+}
+
+/* iTunes bpm number */
+static int mov_write_tmpo_tag(AVIOContext *pb, AVFormatContext *s)
+{
+    AVDictionaryEntry *t = av_dict_get(s->metadata, "tmpo", NULL, 0);
+    int size = 0, tmpo = t ? atoi(t->value) : 0;
+    if (tmpo) {
+        size = 26;
+        avio_wb32(pb, size);
+        ffio_wfourcc(pb, "tmpo");
+        avio_wb32(pb, size-8); /* size */
+        ffio_wfourcc(pb, "data");
+        avio_wb32(pb, 0x15);  //type specifier
+        avio_wb32(pb, 0);
+        avio_wb16(pb, tmpo);        // data
+    }
+    return size;
+}
+
+/* iTunes track number */
+static int mov_write_trkn_tag(AVIOContext *pb, MOVMuxContext *mov,
+                              AVFormatContext *s)
+{
+    AVDictionaryEntry *t = av_dict_get(s->metadata, "track", NULL, 0);
+    int size = 0, track = t ? atoi(t->value) : 0;
+    if (track) {
+        avio_wb32(pb, 32); /* size */
+        ffio_wfourcc(pb, "trkn");
+            avio_wb32(pb, 24); /* size */
+            ffio_wfourcc(pb, "data");
+            avio_wb32(pb, 0);        // 8 bytes empty
+            avio_wb32(pb, 0);
+            avio_wb16(pb, 0);        // empty
+            avio_wb16(pb, track);    // track number
+            avio_wb16(pb, 0);        // total track number
+            avio_wb16(pb, 0);        // empty
+        size = 32;
+    }
+    return size;
+}
+
+static int mov_write_int8_metadata(AVFormatContext *s, AVIOContext *pb,
+                                   const char *name, const char *tag,
+                                   int len)
+{
+    AVDictionaryEntry *t = NULL;
+    uint8_t num;
+
+    if (!(t = av_dict_get(s->metadata, tag, NULL, 0)))
+        return 0;
+    num = atoi(t->value);
+
+    avio_wb32(pb, len+8);
+    ffio_wfourcc(pb, name);
+    if (len==4) avio_wb32(pb, num);
+    else        avio_w8 (pb, num);
+    return len+8;
+}
+
+/* iTunes meta data list */
+static int mov_write_ilst_tag(AVIOContext *pb, MOVMuxContext *mov,
+                              AVFormatContext *s)
+{
+    int64_t pos = avio_tell(pb);
+    avio_wb32(pb, 0); /* size */
+    ffio_wfourcc(pb, "ilst");
+    mov_write_string_metadata(s, pb, "\251nam", "title"    , 1);
+    mov_write_string_metadata(s, pb, "\251ART", "artist"   , 1);
+    mov_write_string_metadata(s, pb, "aART", "album_artist", 1);
+    mov_write_string_metadata(s, pb, "\251wrt", "composer" , 1);
+    mov_write_string_metadata(s, pb, "\251alb", "album"    , 1);
+    mov_write_string_metadata(s, pb, "\251day", "date"     , 1);
+    mov_write_string_tag(pb, "\251too", LIBAVFORMAT_IDENT, 0, 1);
+    mov_write_string_metadata(s, pb, "\251cmt", "comment"  , 1);
+    mov_write_string_metadata(s, pb, "\251gen", "genre"    , 1);
+    mov_write_string_metadata(s, pb, "\251cpy", "copyright", 1);
+    mov_write_string_metadata(s, pb, "\251grp", "grouping" , 1);
+    mov_write_string_metadata(s, pb, "\251lyr", "lyrics"   , 1);
+    mov_write_string_metadata(s, pb, "desc",    "description",1);
+    mov_write_string_metadata(s, pb, "ldes",    "synopsis" , 1);
+    mov_write_string_metadata(s, pb, "tvsh",    "show"     , 1);
+    mov_write_string_metadata(s, pb, "tven",    "episode_id",1);
+    mov_write_string_metadata(s, pb, "tvnn",    "network"  , 1);
+    mov_write_int8_metadata  (s, pb, "tves",    "episode_sort",4);
+    mov_write_int8_metadata  (s, pb, "tvsn",    "season_number",4);
+    mov_write_int8_metadata  (s, pb, "stik",    "media_type",1);
+    mov_write_int8_metadata  (s, pb, "hdvd",    "hd_video",  1);
+    mov_write_int8_metadata  (s, pb, "pgap",    "gapless_playback",1);
+    mov_write_trkn_tag(pb, mov, s);
+    mov_write_tmpo_tag(pb, s);
+    return update_size(pb, pos);
+}
+
+/* iTunes meta data tag */
+static int mov_write_meta_tag(AVIOContext *pb, MOVMuxContext *mov,
+                              AVFormatContext *s)
+{
+    int size = 0;
+    int64_t pos = avio_tell(pb);
+    avio_wb32(pb, 0); /* size */
+    ffio_wfourcc(pb, "meta");
+    avio_wb32(pb, 0);
+    mov_write_itunes_hdlr_tag(pb, mov, s);
+    mov_write_ilst_tag(pb, mov, s);
+    size = update_size(pb, pos);
+    return size;
+}
+
+static int utf8len(const uint8_t *b)
+{
+    int len=0;
+    int val;
+    while(*b){
+        GET_UTF8(val, *b++, return -1;)
+        len++;
+    }
+    return len;
+}
+
+static int ascii_to_wc(AVIOContext *pb, const uint8_t *b)
+{
+    int val;
+    while(*b){
+        GET_UTF8(val, *b++, return -1;)
+        avio_wb16(pb, val);
+    }
+    avio_wb16(pb, 0x00);
+    return 0;
+}
+
+static uint16_t language_code(const char *str)
+{
+    return (((str[0]-0x60) & 0x1F) << 10) + (((str[1]-0x60) & 0x1F) << 5) + ((str[2]-0x60) & 0x1F);
+}
+
+static int mov_write_3gp_udta_tag(AVIOContext *pb, AVFormatContext *s,
+                                  const char *tag, const char *str)
+{
+    int64_t pos = avio_tell(pb);
+    AVDictionaryEntry *t = av_dict_get(s->metadata, str, NULL, 0);
+    if (!t || !utf8len(t->value))
+        return 0;
+    avio_wb32(pb, 0);   /* size */
+    ffio_wfourcc(pb, tag); /* type */
+    avio_wb32(pb, 0);   /* version + flags */
+    if (!strcmp(tag, "yrrc"))
+        avio_wb16(pb, atoi(t->value));
+    else {
+        avio_wb16(pb, language_code("eng")); /* language */
+        avio_write(pb, t->value, strlen(t->value)+1); /* UTF8 string value */
+        if (!strcmp(tag, "albm") &&
+            (t = av_dict_get(s->metadata, "track", NULL, 0)))
+            avio_w8(pb, atoi(t->value));
+    }
+    return update_size(pb, pos);
+}
+
+static int mov_write_chpl_tag(AVIOContext *pb, AVFormatContext *s)
+{
+    int64_t pos = avio_tell(pb);
+    int i, nb_chapters = FFMIN(s->nb_chapters, 255);
+
+    avio_wb32(pb, 0);            // size
+    ffio_wfourcc(pb, "chpl");
+    avio_wb32(pb, 0x01000000);   // version + flags
+    avio_wb32(pb, 0);            // unknown
+    avio_w8(pb, nb_chapters);
+
+    for (i = 0; i < nb_chapters; i++) {
+        AVChapter *c = s->chapters[i];
+        AVDictionaryEntry *t;
+        avio_wb64(pb, av_rescale_q(c->start, c->time_base, (AVRational){1,10000000}));
+
+        if ((t = av_dict_get(c->metadata, "title", NULL, 0))) {
+            int len = FFMIN(strlen(t->value), 255);
+            avio_w8(pb, len);
+            avio_write(pb, t->value, len);
+        } else
+            avio_w8(pb, 0);
+    }
+    return update_size(pb, pos);
+}
+
+static int mov_write_udta_tag(AVIOContext *pb, MOVMuxContext *mov,
+                              AVFormatContext *s)
+{
+    AVIOContext *pb_buf;
+    int i, ret, size;
+    uint8_t *buf;
+
+    for (i = 0; i < s->nb_streams; i++)
+        if (mov->tracks[i].enc->flags & CODEC_FLAG_BITEXACT) {
+            return 0;
+        }
+
+    ret = avio_open_dyn_buf(&pb_buf);
+    if(ret < 0)
+        return ret;
+
+    if (mov->mode & MODE_3GP) {
+        mov_write_3gp_udta_tag(pb_buf, s, "perf", "artist");
+        mov_write_3gp_udta_tag(pb_buf, s, "titl", "title");
+        mov_write_3gp_udta_tag(pb_buf, s, "auth", "author");
+        mov_write_3gp_udta_tag(pb_buf, s, "gnre", "genre");
+        mov_write_3gp_udta_tag(pb_buf, s, "dscp", "comment");
+        mov_write_3gp_udta_tag(pb_buf, s, "albm", "album");
+        mov_write_3gp_udta_tag(pb_buf, s, "cprt", "copyright");
+        mov_write_3gp_udta_tag(pb_buf, s, "yrrc", "date");
+    } else if (mov->mode == MODE_MOV) { // the title field breaks gtkpod with mp4 and my suspicion is that stuff is not valid in mp4
+        mov_write_string_metadata(s, pb_buf, "\251ART", "artist"     , 0);
+        mov_write_string_metadata(s, pb_buf, "\251nam", "title"      , 0);
+        mov_write_string_metadata(s, pb_buf, "\251aut", "author"     , 0);
+        mov_write_string_metadata(s, pb_buf, "\251alb", "album"      , 0);
+        mov_write_string_metadata(s, pb_buf, "\251day", "date"       , 0);
+        mov_write_string_metadata(s, pb_buf, "\251swr", "encoder"    , 0);
+        // currently ignored by mov.c
+        mov_write_string_metadata(s, pb_buf, "\251des", "comment"    , 0);
+        // add support for libquicktime, this atom is also actually read by mov.c
+        mov_write_string_metadata(s, pb_buf, "\251cmt", "comment"    , 0);
+        mov_write_string_metadata(s, pb_buf, "\251gen", "genre"      , 0);
+        mov_write_string_metadata(s, pb_buf, "\251cpy", "copyright"  , 0);
+    } else {
+        /* iTunes meta data */
+        mov_write_meta_tag(pb_buf, mov, s);
+    }
+
+    if (s->nb_chapters)
+        mov_write_chpl_tag(pb_buf, s);
+
+    if ((size = avio_close_dyn_buf(pb_buf, &buf)) > 0) {
+        avio_wb32(pb, size+8);
+        ffio_wfourcc(pb, "udta");
+        avio_write(pb, buf, size);
+    }
+    av_free(buf);
+
+    return 0;
+}
+
+static void mov_write_psp_udta_tag(AVIOContext *pb,
+                                  const char *str, const char *lang, int type)
+{
+    int len = utf8len(str)+1;
+    if(len<=0)
+        return;
+    avio_wb16(pb, len*2+10);            /* size */
+    avio_wb32(pb, type);                /* type */
+    avio_wb16(pb, language_code(lang)); /* language */
+    avio_wb16(pb, 0x01);                /* ? */
+    ascii_to_wc(pb, str);
+}
+
+static int mov_write_uuidusmt_tag(AVIOContext *pb, AVFormatContext *s)
+{
+    AVDictionaryEntry *title = av_dict_get(s->metadata, "title", NULL, 0);
+    int64_t pos, pos2;
+
+    if (title) {
+        pos = avio_tell(pb);
+        avio_wb32(pb, 0); /* size placeholder*/
+        ffio_wfourcc(pb, "uuid");
+        ffio_wfourcc(pb, "USMT");
+        avio_wb32(pb, 0x21d24fce); /* 96 bit UUID */
+        avio_wb32(pb, 0xbb88695c);
+        avio_wb32(pb, 0xfac9c740);
+
+        pos2 = avio_tell(pb);
+        avio_wb32(pb, 0); /* size placeholder*/
+        ffio_wfourcc(pb, "MTDT");
+        avio_wb16(pb, 4);
+
+        // ?
+        avio_wb16(pb, 0x0C);                 /* size */
+        avio_wb32(pb, 0x0B);                 /* type */
+        avio_wb16(pb, language_code("und")); /* language */
+        avio_wb16(pb, 0x0);                  /* ? */
+        avio_wb16(pb, 0x021C);               /* data */
+
+        mov_write_psp_udta_tag(pb, LIBAVCODEC_IDENT,      "eng", 0x04);
+        mov_write_psp_udta_tag(pb, title->value,          "eng", 0x01);
+        mov_write_psp_udta_tag(pb, "2006/04/01 11:11:11", "und", 0x03);
+
+        update_size(pb, pos2);
+        return update_size(pb, pos);
+    }
+
+    return 0;
+}
+
+static void build_chunks(MOVTrack *trk)
+{
+    int i;
+    MOVIentry *chunk= &trk->cluster[0];
+    uint64_t chunkSize = chunk->size;
+    chunk->chunkNum= 1;
+    if (trk->chunkCount)
+        return;
+    trk->chunkCount= 1;
+    for(i=1; i<trk->entry; i++){
+        if(chunk->pos + chunkSize == trk->cluster[i].pos &&
+            chunkSize + trk->cluster[i].size < (1<<20)){
+            chunkSize             += trk->cluster[i].size;
+            chunk->samples_in_chunk += trk->cluster[i].entries;
+        }else{
+            trk->cluster[i].chunkNum = chunk->chunkNum+1;
+            chunk=&trk->cluster[i];
+            chunkSize = chunk->size;
+            trk->chunkCount++;
+        }
+    }
+}
+
+static int mov_write_moov_tag(AVIOContext *pb, MOVMuxContext *mov,
+                              AVFormatContext *s)
+{
+    int i;
+    int64_t pos = avio_tell(pb);
+    int not_first[AVMEDIA_TYPE_NB]={0};
+    avio_wb32(pb, 0); /* size placeholder*/
+    ffio_wfourcc(pb, "moov");
+
+    for (i=0; i<mov->nb_streams; i++) {
+        if (mov->tracks[i].entry <= 0 && !(mov->flags & FF_MOV_FLAG_FRAGMENT))
+            continue;
+
+        mov->tracks[i].time = mov->time;
+        mov->tracks[i].track_id = i+1;
+
+        if (mov->tracks[i].entry)
+            build_chunks(&mov->tracks[i]);
+    }
+
+    if (mov->chapter_track)
+        for (i=0; i<s->nb_streams; i++) {
+            mov->tracks[i].tref_tag = MKTAG('c','h','a','p');
+            mov->tracks[i].tref_id = mov->tracks[mov->chapter_track].track_id;
+        }
+    for (i = 0; i < mov->nb_streams; i++) {
+        if (mov->tracks[i].tag == MKTAG('r','t','p',' ')) {
+            mov->tracks[i].tref_tag = MKTAG('h','i','n','t');
+            mov->tracks[i].tref_id =
+                mov->tracks[mov->tracks[i].src_track].track_id;
+        }
+    }
+    for (i = 0; i < mov->nb_streams; i++) {
+        if (mov->tracks[i].tag == MKTAG('t','m','c','d')) {
+            int src_trk = mov->tracks[i].src_track;
+            mov->tracks[src_trk].tref_tag = mov->tracks[i].tag;
+            mov->tracks[src_trk].tref_id  = mov->tracks[i].track_id;
+            mov->tracks[i].track_duration = mov->tracks[src_trk].track_duration;
+        }
+    }
+
+    mov_write_mvhd_tag(pb, mov);
+    if (mov->mode != MODE_MOV && !mov->iods_skip)
+        mov_write_iods_tag(pb, mov);
+    for (i=0; i<mov->nb_streams; i++) {
+        if (mov->tracks[i].entry > 0 || mov->flags & FF_MOV_FLAG_FRAGMENT) {
+            if(i < s->nb_streams){
+                int codec_type= s->streams[i]->codec->codec_type;
+                if(codec_type==AVMEDIA_TYPE_AUDIO || codec_type==AVMEDIA_TYPE_SUBTITLE){
+                    mov->tracks[i].secondary= not_first[codec_type];
+                    not_first[codec_type]= 1;
+                }
+            }
+            mov_write_trak_tag(pb, mov, &(mov->tracks[i]), i < s->nb_streams ? s->streams[i] : NULL);
+        }
+    }
+    if (mov->flags & FF_MOV_FLAG_FRAGMENT)
+        mov_write_mvex_tag(pb, mov); /* QuickTime requires trak to precede this */
+
+    if (mov->mode == MODE_PSP)
+        mov_write_uuidusmt_tag(pb, s);
+    else
+        mov_write_udta_tag(pb, mov, s);
+
+    return update_size(pb, pos);
+}
+
+static void param_write_int(AVIOContext *pb, const char *name, int value)
+{
+    avio_printf(pb, "<param name=\"%s\" value=\"%d\" valuetype=\"data\"/>\n", name, value);
+}
+
+static void param_write_string(AVIOContext *pb, const char *name, const char *value)
+{
+    avio_printf(pb, "<param name=\"%s\" value=\"%s\" valuetype=\"data\"/>\n", name, value);
+}
+
+static void param_write_hex(AVIOContext *pb, const char *name, const uint8_t *value, int len)
+{
+    char buf[150];
+    len = FFMIN(sizeof(buf)/2 - 1, len);
+    ff_data_to_hex(buf, value, len, 0);
+    buf[2*len] = '\0';
+    avio_printf(pb, "<param name=\"%s\" value=\"%s\" valuetype=\"data\"/>\n", name, buf);
+}
+
+static int mov_write_isml_manifest(AVIOContext *pb, MOVMuxContext *mov)
+{
+    int64_t pos = avio_tell(pb);
+    int i;
+    const uint8_t uuid[] = {
+        0xa5, 0xd4, 0x0b, 0x30, 0xe8, 0x14, 0x11, 0xdd,
+        0xba, 0x2f, 0x08, 0x00, 0x20, 0x0c, 0x9a, 0x66
+    };
+
+    avio_wb32(pb, 0);
+    ffio_wfourcc(pb, "uuid");
+    avio_write(pb, uuid, sizeof(uuid));
+    avio_wb32(pb, 0);
+
+    avio_printf(pb, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
+    avio_printf(pb, "<smil xmlns=\"http://www.w3.org/2001/SMIL20/Language\">\n");
+    avio_printf(pb, "<head>\n");
+    avio_printf(pb, "<meta name=\"creator\" content=\"%s\" />\n",
+                    LIBAVFORMAT_IDENT);
+    avio_printf(pb, "</head>\n");
+    avio_printf(pb, "<body>\n");
+    avio_printf(pb, "<switch>\n");
+    for (i = 0; i < mov->nb_streams; i++) {
+        MOVTrack *track = &mov->tracks[i];
+        const char *type;
+        /* track->track_id is initialized in write_moov, and thus isn't known
+         * here yet */
+        int track_id = i + 1;
+
+        if (track->enc->codec_type == AVMEDIA_TYPE_VIDEO) {
+            type = "video";
+        } else if (track->enc->codec_type == AVMEDIA_TYPE_AUDIO) {
+            type = "audio";
+        } else {
+            continue;
+        }
+        avio_printf(pb, "<%s systemBitrate=\"%d\">\n", type,
+                                                       track->enc->bit_rate);
+        param_write_int(pb, "systemBitrate", track->enc->bit_rate);
+        param_write_int(pb, "trackID", track_id);
+        if (track->enc->codec_type == AVMEDIA_TYPE_VIDEO) {
+            if (track->enc->codec_id == AV_CODEC_ID_H264) {
+                uint8_t *ptr;
+                int size = track->enc->extradata_size;
+                if (!ff_avc_write_annexb_extradata(track->enc->extradata, &ptr,
+                                                   &size)) {
+                    param_write_hex(pb, "CodecPrivateData",
+                                    ptr ? ptr : track->enc->extradata,
+                                    size);
+                    av_free(ptr);
+                }
+                param_write_string(pb, "FourCC", "H264");
+            } else if (track->enc->codec_id == AV_CODEC_ID_VC1) {
+                param_write_string(pb, "FourCC", "WVC1");
+                param_write_hex(pb, "CodecPrivateData", track->enc->extradata,
+                                track->enc->extradata_size);
+            }
+            param_write_int(pb, "MaxWidth", track->enc->width);
+            param_write_int(pb, "MaxHeight", track->enc->height);
+            param_write_int(pb, "DisplayWidth", track->enc->width);
+            param_write_int(pb, "DisplayHeight", track->enc->height);
+        } else {
+            if (track->enc->codec_id == AV_CODEC_ID_AAC) {
+                param_write_string(pb, "FourCC", "AACL");
+            } else if (track->enc->codec_id == AV_CODEC_ID_WMAPRO) {
+                param_write_string(pb, "FourCC", "WMAP");
+            }
+            param_write_hex(pb, "CodecPrivateData", track->enc->extradata,
+                            track->enc->extradata_size);
+            param_write_int(pb, "AudioTag", ff_codec_get_tag(ff_codec_wav_tags,
+                                                track->enc->codec_id));
+            param_write_int(pb, "Channels", track->enc->channels);
+            param_write_int(pb, "SamplingRate", track->enc->sample_rate);
+            param_write_int(pb, "BitsPerSample", 16);
+            param_write_int(pb, "PacketSize", track->enc->block_align ?
+                                              track->enc->block_align : 4);
+        }
+        avio_printf(pb, "</%s>\n", type);
+    }
+    avio_printf(pb, "</switch>\n");
+    avio_printf(pb, "</body>\n");
+    avio_printf(pb, "</smil>\n");
+
+    return update_size(pb, pos);
+}
+
+static int mov_write_mfhd_tag(AVIOContext *pb, MOVMuxContext *mov)
+{
+    avio_wb32(pb, 16);
+    ffio_wfourcc(pb, "mfhd");
+    avio_wb32(pb, 0);
+    avio_wb32(pb, mov->fragments);
+    return 0;
+}
+
+static int mov_write_tfhd_tag(AVIOContext *pb, MOVTrack *track,
+                              int64_t moof_offset)
+{
+    int64_t pos = avio_tell(pb);
+    uint32_t flags = MOV_TFHD_DEFAULT_SIZE | MOV_TFHD_DEFAULT_DURATION |
+                     MOV_TFHD_BASE_DATA_OFFSET;
+    if (!track->entry) {
+        flags |= MOV_TFHD_DURATION_IS_EMPTY;
+    } else {
+        flags |= MOV_TFHD_DEFAULT_FLAGS;
+    }
+
+    /* Don't set a default sample size, the silverlight player refuses
+     * to play files with that set. Don't set a default sample duration,
+     * WMP freaks out if it is set. */
+    if (track->mode == MODE_ISM)
+        flags &= ~(MOV_TFHD_DEFAULT_SIZE | MOV_TFHD_DEFAULT_DURATION);
+
+    avio_wb32(pb, 0); /* size placeholder */
+    ffio_wfourcc(pb, "tfhd");
+    avio_w8(pb, 0); /* version */
+    avio_wb24(pb, flags);
+
+    avio_wb32(pb, track->track_id); /* track-id */
+    if (flags & MOV_TFHD_BASE_DATA_OFFSET)
+        avio_wb64(pb, moof_offset);
+    if (flags & MOV_TFHD_DEFAULT_DURATION) {
+        track->default_duration = get_cluster_duration(track, 0);
+        avio_wb32(pb, track->default_duration);
+    }
+    if (flags & MOV_TFHD_DEFAULT_SIZE) {
+        track->default_size = track->entry ? track->cluster[0].size : 1;
+        avio_wb32(pb, track->default_size);
+    } else
+        track->default_size = -1;
+
+    if (flags & MOV_TFHD_DEFAULT_FLAGS) {
+        track->default_sample_flags =
+            track->enc->codec_type == AVMEDIA_TYPE_VIDEO ?
+            (MOV_FRAG_SAMPLE_FLAG_DEPENDS_YES | MOV_FRAG_SAMPLE_FLAG_IS_NON_SYNC) :
+            MOV_FRAG_SAMPLE_FLAG_DEPENDS_NO;
+        avio_wb32(pb, track->default_sample_flags);
+    }
+
+    return update_size(pb, pos);
+}
+
+static uint32_t get_sample_flags(MOVTrack *track, MOVIentry *entry)
+{
+    return entry->flags & MOV_SYNC_SAMPLE ? MOV_FRAG_SAMPLE_FLAG_DEPENDS_NO :
+           (MOV_FRAG_SAMPLE_FLAG_DEPENDS_YES | MOV_FRAG_SAMPLE_FLAG_IS_NON_SYNC);
+}
+
+static int mov_write_trun_tag(AVIOContext *pb, MOVTrack *track)
+{
+    int64_t pos = avio_tell(pb);
+    uint32_t flags = MOV_TRUN_DATA_OFFSET;
+    int i;
+
+    for (i = 0; i < track->entry; i++) {
+        if (get_cluster_duration(track, i) != track->default_duration)
+            flags |= MOV_TRUN_SAMPLE_DURATION;
+        if (track->cluster[i].size != track->default_size)
+            flags |= MOV_TRUN_SAMPLE_SIZE;
+        if (i > 0 && get_sample_flags(track, &track->cluster[i]) != track->default_sample_flags)
+            flags |= MOV_TRUN_SAMPLE_FLAGS;
+    }
+    if (!(flags & MOV_TRUN_SAMPLE_FLAGS))
+        flags |= MOV_TRUN_FIRST_SAMPLE_FLAGS;
+    if (track->flags & MOV_TRACK_CTTS)
+        flags |= MOV_TRUN_SAMPLE_CTS;
+
+    avio_wb32(pb, 0); /* size placeholder */
+    ffio_wfourcc(pb, "trun");
+    avio_w8(pb, 0); /* version */
+    avio_wb24(pb, flags);
+
+    avio_wb32(pb, track->entry); /* sample count */
+    track->moof_size_offset = avio_tell(pb);
+    avio_wb32(pb, 0); /* data offset */
+    if (flags & MOV_TRUN_FIRST_SAMPLE_FLAGS)
+        avio_wb32(pb, get_sample_flags(track, &track->cluster[0]));
+
+    for (i = 0; i < track->entry; i++) {
+        if (flags & MOV_TRUN_SAMPLE_DURATION)
+            avio_wb32(pb, get_cluster_duration(track, i));
+        if (flags & MOV_TRUN_SAMPLE_SIZE)
+            avio_wb32(pb, track->cluster[i].size);
+        if (flags & MOV_TRUN_SAMPLE_FLAGS)
+            avio_wb32(pb, get_sample_flags(track, &track->cluster[i]));
+        if (flags & MOV_TRUN_SAMPLE_CTS)
+            avio_wb32(pb, track->cluster[i].cts);
+    }
+
+    return update_size(pb, pos);
+}
+
+static int mov_write_tfxd_tag(AVIOContext *pb, MOVTrack *track)
+{
+    int64_t pos = avio_tell(pb);
+    const uint8_t uuid[] = {
+        0x6d, 0x1d, 0x9b, 0x05, 0x42, 0xd5, 0x44, 0xe6,
+        0x80, 0xe2, 0x14, 0x1d, 0xaf, 0xf7, 0x57, 0xb2
+    };
+
+    avio_wb32(pb, 0); /* size placeholder */
+    ffio_wfourcc(pb, "uuid");
+    avio_write(pb, uuid, sizeof(uuid));
+    avio_w8(pb, 1);
+    avio_wb24(pb, 0);
+    avio_wb64(pb, track->frag_start);
+    avio_wb64(pb, track->start_dts + track->track_duration -
+                  track->cluster[0].dts);
+
+    return update_size(pb, pos);
+}
+
+static int mov_write_tfrf_tag(AVIOContext *pb, MOVMuxContext *mov,
+                              MOVTrack *track, int entry)
+{
+    int n = track->nb_frag_info - 1 - entry, i;
+    int size = 8 + 16 + 4 + 1 + 16*n;
+    const uint8_t uuid[] = {
+        0xd4, 0x80, 0x7e, 0xf2, 0xca, 0x39, 0x46, 0x95,
+        0x8e, 0x54, 0x26, 0xcb, 0x9e, 0x46, 0xa7, 0x9f
+    };
+
+    if (entry < 0)
+        return 0;
+
+    avio_seek(pb, track->frag_info[entry].tfrf_offset, SEEK_SET);
+    avio_wb32(pb, size);
+    ffio_wfourcc(pb, "uuid");
+    avio_write(pb, uuid, sizeof(uuid));
+    avio_w8(pb, 1);
+    avio_wb24(pb, 0);
+    avio_w8(pb, n);
+    for (i = 0; i < n; i++) {
+        int index = entry + 1 + i;
+        avio_wb64(pb, track->frag_info[index].time);
+        avio_wb64(pb, track->frag_info[index].duration);
+    }
+    if (n < mov->ism_lookahead) {
+        int free_size = 16*(mov->ism_lookahead - n);
+        avio_wb32(pb, free_size);
+        ffio_wfourcc(pb, "free");
+        for (i = 0; i < free_size - 8; i++)
+            avio_w8(pb, 0);
+    }
+
+    return 0;
+}
+
+static int mov_write_tfrf_tags(AVIOContext *pb, MOVMuxContext *mov,
+                               MOVTrack *track)
+{
+    int64_t pos = avio_tell(pb);
+    int i;
+    for (i = 0; i < mov->ism_lookahead; i++) {
+        /* Update the tfrf tag for the last ism_lookahead fragments,
+         * nb_frag_info - 1 is the next fragment to be written. */
+        mov_write_tfrf_tag(pb, mov, track, track->nb_frag_info - 2 - i);
+    }
+    avio_seek(pb, pos, SEEK_SET);
+    return 0;
+}
+
+static int mov_write_traf_tag(AVIOContext *pb, MOVMuxContext *mov,
+                              MOVTrack *track, int64_t moof_offset)
+{
+    int64_t pos = avio_tell(pb);
+    avio_wb32(pb, 0); /* size placeholder */
+    ffio_wfourcc(pb, "traf");
+
+    mov_write_tfhd_tag(pb, track, moof_offset);
+    mov_write_trun_tag(pb, track);
+    if (mov->mode == MODE_ISM) {
+        mov_write_tfxd_tag(pb, track);
+
+        if (mov->ism_lookahead) {
+            int i, size = 16 + 4 + 1 + 16*mov->ism_lookahead;
+
+            track->tfrf_offset = avio_tell(pb);
+            avio_wb32(pb, 8 + size);
+            ffio_wfourcc(pb, "free");
+            for (i = 0; i < size; i++)
+                avio_w8(pb, 0);
+        }
+    }
+
+    return update_size(pb, pos);
+}
+
+static int mov_write_moof_tag(AVIOContext *pb, MOVMuxContext *mov, int tracks)
+{
+    int64_t pos = avio_tell(pb), end;
+    int i, moof_size;
+
+    avio_wb32(pb, 0); /* size placeholder */
+    ffio_wfourcc(pb, "moof");
+
+    mov_write_mfhd_tag(pb, mov);
+    for (i = 0; i < mov->nb_streams; i++) {
+        MOVTrack *track = &mov->tracks[i];
+        if (tracks >= 0 && i != tracks)
+            continue;
+        if (!track->entry)
+            continue;
+        mov_write_traf_tag(pb, mov, track, pos);
+    }
+
+    end = avio_tell(pb);
+    moof_size = end - pos;
+    for (i = 0; i < mov->nb_streams; i++) {
+        MOVTrack *track = &mov->tracks[i];
+        if (tracks >= 0 && i != tracks)
+            continue;
+        if (!track->entry)
+            continue;
+        avio_seek(pb, mov->tracks[i].moof_size_offset, SEEK_SET);
+        avio_wb32(pb, moof_size + 8 + mov->tracks[i].data_offset);
+    }
+    avio_seek(pb, end, SEEK_SET);
+
+    return update_size(pb, pos);
+}
+
+static int mov_write_tfra_tag(AVIOContext *pb, MOVTrack *track)
+{
+    int64_t pos = avio_tell(pb);
+    int i;
+
+    avio_wb32(pb, 0); /* size placeholder */
+    ffio_wfourcc(pb, "tfra");
+    avio_w8(pb, 1); /* version */
+    avio_wb24(pb, 0);
+
+    avio_wb32(pb, track->track_id);
+    avio_wb32(pb, 0); /* length of traf/trun/sample num */
+    avio_wb32(pb, track->nb_frag_info);
+    for (i = 0; i < track->nb_frag_info; i++) {
+        avio_wb64(pb, track->frag_info[i].time);
+        avio_wb64(pb, track->frag_info[i].offset);
+        avio_w8(pb, 1); /* traf number */
+        avio_w8(pb, 1); /* trun number */
+        avio_w8(pb, 1); /* sample number */
+    }
+
+    return update_size(pb, pos);
+}
+
+static int mov_write_mfra_tag(AVIOContext *pb, MOVMuxContext *mov)
+{
+    int64_t pos = avio_tell(pb);
+    int i;
+
+    avio_wb32(pb, 0); /* size placeholder */
+    ffio_wfourcc(pb, "mfra");
+    /* An empty mfra atom is enough to indicate to the publishing point that
+     * the stream has ended. */
+    if (mov->flags & FF_MOV_FLAG_ISML)
+        return update_size(pb, pos);
+
+    for (i = 0; i < mov->nb_streams; i++) {
+        MOVTrack *track = &mov->tracks[i];
+        if (track->nb_frag_info)
+            mov_write_tfra_tag(pb, track);
+    }
+
+    avio_wb32(pb, 16);
+    ffio_wfourcc(pb, "mfro");
+    avio_wb32(pb, 0); /* version + flags */
+    avio_wb32(pb, avio_tell(pb) + 4 - pos);
+
+    return update_size(pb, pos);
+}
+
+static int mov_write_mdat_tag(AVIOContext *pb, MOVMuxContext *mov)
+{
+    avio_wb32(pb, 8);    // placeholder for extended size field (64 bit)
+    ffio_wfourcc(pb, mov->mode == MODE_MOV ? "wide" : "free");
+
+    mov->mdat_pos = avio_tell(pb);
+    avio_wb32(pb, 0); /* size placeholder*/
+    ffio_wfourcc(pb, "mdat");
+    return 0;
+}
+
+/* TODO: This needs to be more general */
+static int mov_write_ftyp_tag(AVIOContext *pb, AVFormatContext *s)
+{
+    MOVMuxContext *mov = s->priv_data;
+    int64_t pos = avio_tell(pb);
+    int has_h264 = 0, has_video = 0;
+    int minor = 0x200;
+    int i;
+
+    for (i = 0; i < s->nb_streams; i++) {
+        AVStream *st = s->streams[i];
+        if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
+            has_video = 1;
+        if (st->codec->codec_id == AV_CODEC_ID_H264)
+            has_h264 = 1;
+    }
+
+    avio_wb32(pb, 0); /* size */
+    ffio_wfourcc(pb, "ftyp");
+
+    if (mov->mode == MODE_3GP) {
+        ffio_wfourcc(pb, has_h264 ? "3gp6"  : "3gp4");
+        minor =     has_h264 ?   0x100 :   0x200;
+    } else if (mov->mode & MODE_3G2) {
+        ffio_wfourcc(pb, has_h264 ? "3g2b"  : "3g2a");
+        minor =     has_h264 ? 0x20000 : 0x10000;
+    }else if (mov->mode == MODE_PSP)
+        ffio_wfourcc(pb, "MSNV");
+    else if (mov->mode == MODE_MP4)
+        ffio_wfourcc(pb, "isom");
+    else if (mov->mode == MODE_IPOD)
+        ffio_wfourcc(pb, has_video ? "M4V ":"M4A ");
+    else if (mov->mode == MODE_ISM)
+        ffio_wfourcc(pb, "isml");
+    else if (mov->mode == MODE_F4V)
+        ffio_wfourcc(pb, "f4v ");
+    else
+        ffio_wfourcc(pb, "qt  ");
+
+    avio_wb32(pb, minor);
+
+    if(mov->mode == MODE_MOV)
+        ffio_wfourcc(pb, "qt  ");
+    else if (mov->mode == MODE_ISM) {
+        ffio_wfourcc(pb, "piff");
+        ffio_wfourcc(pb, "iso2");
+    } else {
+        ffio_wfourcc(pb, "isom");
+        ffio_wfourcc(pb, "iso2");
+        if(has_h264)
+            ffio_wfourcc(pb, "avc1");
+    }
+
+    if (mov->mode == MODE_3GP)
+        ffio_wfourcc(pb, has_h264 ? "3gp6":"3gp4");
+    else if (mov->mode & MODE_3G2)
+        ffio_wfourcc(pb, has_h264 ? "3g2b":"3g2a");
+    else if (mov->mode == MODE_PSP)
+        ffio_wfourcc(pb, "MSNV");
+    else if (mov->mode == MODE_MP4)
+        ffio_wfourcc(pb, "mp41");
+    return update_size(pb, pos);
+}
+
+static void mov_write_uuidprof_tag(AVIOContext *pb, AVFormatContext *s)
+{
+    AVCodecContext *video_codec = s->streams[0]->codec;
+    AVCodecContext *audio_codec = s->streams[1]->codec;
+    int audio_rate = audio_codec->sample_rate;
+    int frame_rate = ((video_codec->time_base.den) * (0x10000))/ (video_codec->time_base.num);
+    int audio_kbitrate = audio_codec->bit_rate / 1000;
+    int video_kbitrate = FFMIN(video_codec->bit_rate / 1000, 800 - audio_kbitrate);
+
+    avio_wb32(pb, 0x94); /* size */
+    ffio_wfourcc(pb, "uuid");
+    ffio_wfourcc(pb, "PROF");
+
+    avio_wb32(pb, 0x21d24fce); /* 96 bit UUID */
+    avio_wb32(pb, 0xbb88695c);
+    avio_wb32(pb, 0xfac9c740);
+
+    avio_wb32(pb, 0x0);  /* ? */
+    avio_wb32(pb, 0x3);  /* 3 sections ? */
+
+    avio_wb32(pb, 0x14); /* size */
+    ffio_wfourcc(pb, "FPRF");
+    avio_wb32(pb, 0x0);  /* ? */
+    avio_wb32(pb, 0x0);  /* ? */
+    avio_wb32(pb, 0x0);  /* ? */
+
+    avio_wb32(pb, 0x2c);  /* size */
+    ffio_wfourcc(pb, "APRF");/* audio */
+    avio_wb32(pb, 0x0);
+    avio_wb32(pb, 0x2);   /* TrackID */
+    ffio_wfourcc(pb, "mp4a");
+    avio_wb32(pb, 0x20f);
+    avio_wb32(pb, 0x0);
+    avio_wb32(pb, audio_kbitrate);
+    avio_wb32(pb, audio_kbitrate);
+    avio_wb32(pb, audio_rate);
+    avio_wb32(pb, audio_codec->channels);
+
+    avio_wb32(pb, 0x34);  /* size */
+    ffio_wfourcc(pb, "VPRF");   /* video */
+    avio_wb32(pb, 0x0);
+    avio_wb32(pb, 0x1);    /* TrackID */
+    if (video_codec->codec_id == AV_CODEC_ID_H264) {
+        ffio_wfourcc(pb, "avc1");
+        avio_wb16(pb, 0x014D);
+        avio_wb16(pb, 0x0015);
+    } else {
+        ffio_wfourcc(pb, "mp4v");
+        avio_wb16(pb, 0x0000);
+        avio_wb16(pb, 0x0103);
+    }
+    avio_wb32(pb, 0x0);
+    avio_wb32(pb, video_kbitrate);
+    avio_wb32(pb, video_kbitrate);
+    avio_wb32(pb, frame_rate);
+    avio_wb32(pb, frame_rate);
+    avio_wb16(pb, video_codec->width);
+    avio_wb16(pb, video_codec->height);
+    avio_wb32(pb, 0x010001); /* ? */
+}
+
+static int mov_parse_mpeg2_frame(AVPacket *pkt, uint32_t *flags)
+{
+    uint32_t c = -1;
+    int i, closed_gop = 0;
+
+    for (i = 0; i < pkt->size - 4; i++) {
+        c = (c<<8) + pkt->data[i];
+        if (c == 0x1b8) { // gop
+            closed_gop = pkt->data[i+4]>>6 & 0x01;
+        } else if (c == 0x100) { // pic
+            int temp_ref = (pkt->data[i+1]<<2) | (pkt->data[i+2]>>6);
+            if (!temp_ref || closed_gop) // I picture is not reordered
+                *flags = MOV_SYNC_SAMPLE;
+            else
+                *flags = MOV_PARTIAL_SYNC_SAMPLE;
+            break;
+        }
+    }
+    return 0;
+}
+
+static void mov_parse_vc1_frame(AVPacket *pkt, MOVTrack *trk, int fragment)
+{
+    const uint8_t *start, *next, *end = pkt->data + pkt->size;
+    int seq = 0, entry = 0;
+    int key = pkt->flags & AV_PKT_FLAG_KEY;
+    start = find_next_marker(pkt->data, end);
+    for (next = start; next < end; start = next) {
+        next = find_next_marker(start + 4, end);
+        switch (AV_RB32(start)) {
+        case VC1_CODE_SEQHDR:
+            seq = 1;
+            break;
+        case VC1_CODE_ENTRYPOINT:
+            entry = 1;
+            break;
+        case VC1_CODE_SLICE:
+            trk->vc1_info.slices = 1;
+            break;
+        }
+    }
+    if (!trk->entry && !fragment) {
+        /* First packet in first fragment */
+        trk->vc1_info.first_packet_seq   = seq;
+        trk->vc1_info.first_packet_entry = entry;
+    } else if ((seq && !trk->vc1_info.packet_seq) ||
+               (entry && !trk->vc1_info.packet_entry)) {
+        int i;
+        for (i = 0; i < trk->entry; i++)
+            trk->cluster[i].flags &= ~MOV_SYNC_SAMPLE;
+        trk->has_keyframes = 0;
+        if (seq)
+            trk->vc1_info.packet_seq = 1;
+        if (entry)
+            trk->vc1_info.packet_entry = 1;
+        if (!fragment) {
+            /* First fragment */
+            if ((!seq   || trk->vc1_info.first_packet_seq) &&
+                (!entry || trk->vc1_info.first_packet_entry)) {
+                /* First packet had the same headers as this one, readd the
+                 * sync sample flag. */
+                trk->cluster[0].flags |= MOV_SYNC_SAMPLE;
+                trk->has_keyframes = 1;
+            }
+        }
+    }
+    if (trk->vc1_info.packet_seq && trk->vc1_info.packet_entry)
+        key = seq && entry;
+    else if (trk->vc1_info.packet_seq)
+        key = seq;
+    else if (trk->vc1_info.packet_entry)
+        key = entry;
+    if (key) {
+        trk->cluster[trk->entry].flags |= MOV_SYNC_SAMPLE;
+        trk->has_keyframes++;
+    }
+}
+
+static int get_moov_size(AVFormatContext *s)
+{
+    int ret;
+    uint8_t *buf;
+    AVIOContext *moov_buf;
+    MOVMuxContext *mov = s->priv_data;
+
+    if ((ret = avio_open_dyn_buf(&moov_buf)) < 0)
+        return ret;
+    mov_write_moov_tag(moov_buf, mov, s);
+    ret = avio_close_dyn_buf(moov_buf, &buf);
+    av_free(buf);
+    return ret;
+}
+
+static int mov_flush_fragment(AVFormatContext *s)
+{
+    MOVMuxContext *mov = s->priv_data;
+    int i, first_track = -1;
+    int64_t mdat_size = 0;
+
+    if (!(mov->flags & FF_MOV_FLAG_FRAGMENT))
+        return 0;
+
+    if (!(mov->flags & FF_MOV_FLAG_EMPTY_MOOV) && mov->fragments == 0) {
+        int64_t pos = avio_tell(s->pb);
+        uint8_t *buf;
+        int buf_size, moov_size;
+
+        for (i = 0; i < mov->nb_streams; i++)
+            if (!mov->tracks[i].entry)
+                break;
+        /* Don't write the initial moov unless all tracks have data */
+        if (i < mov->nb_streams)
+            return 0;
+
+        moov_size = get_moov_size(s);
+        for (i = 0; i < mov->nb_streams; i++)
+            mov->tracks[i].data_offset = pos + moov_size + 8;
+
+        mov_write_moov_tag(s->pb, mov, s);
+
+        buf_size = avio_close_dyn_buf(mov->mdat_buf, &buf);
+        mov->mdat_buf = NULL;
+        avio_wb32(s->pb, buf_size + 8);
+        ffio_wfourcc(s->pb, "mdat");
+        avio_write(s->pb, buf, buf_size);
+        av_free(buf);
+
+        mov->fragments++;
+        mov->mdat_size = 0;
+        for (i = 0; i < mov->nb_streams; i++) {
+            if (mov->tracks[i].entry)
+                mov->tracks[i].frag_start += mov->tracks[i].start_dts +
+                                             mov->tracks[i].track_duration -
+                                             mov->tracks[i].cluster[0].dts;
+            mov->tracks[i].entry = 0;
+        }
+        avio_flush(s->pb);
+        return 0;
+    }
+
+    for (i = 0; i < mov->nb_streams; i++) {
+        MOVTrack *track = &mov->tracks[i];
+        if (mov->flags & FF_MOV_FLAG_SEPARATE_MOOF)
+            track->data_offset = 0;
+        else
+            track->data_offset = mdat_size;
+        if (!track->mdat_buf)
+            continue;
+        mdat_size += avio_tell(track->mdat_buf);
+        if (first_track < 0)
+            first_track = i;
+    }
+
+    if (!mdat_size)
+        return 0;
+
+    for (i = 0; i < mov->nb_streams; i++) {
+        MOVTrack *track = &mov->tracks[i];
+        int buf_size, write_moof = 1, moof_tracks = -1;
+        uint8_t *buf;
+        int64_t duration = 0;
+
+        if (track->entry)
+            duration = track->start_dts + track->track_duration -
+                       track->cluster[0].dts;
+        if (mov->flags & FF_MOV_FLAG_SEPARATE_MOOF) {
+            if (!track->mdat_buf)
+                continue;
+            mdat_size = avio_tell(track->mdat_buf);
+            moof_tracks = i;
+        } else {
+            write_moof = i == first_track;
+        }
+
+        if (write_moof) {
+            MOVFragmentInfo *info;
+            avio_flush(s->pb);
+            track->nb_frag_info++;
+            track->frag_info = av_realloc(track->frag_info,
+                                          sizeof(*track->frag_info) *
+                                          track->nb_frag_info);
+            info = &track->frag_info[track->nb_frag_info - 1];
+            info->offset   = avio_tell(s->pb);
+            info->time     = mov->tracks[i].frag_start;
+            info->duration = duration;
+            mov_write_tfrf_tags(s->pb, mov, track);
+
+            mov_write_moof_tag(s->pb, mov, moof_tracks);
+            info->tfrf_offset = track->tfrf_offset;
+            mov->fragments++;
+
+            avio_wb32(s->pb, mdat_size + 8);
+            ffio_wfourcc(s->pb, "mdat");
+        }
+
+        if (track->entry)
+            track->frag_start += duration;
+        track->entry = 0;
+        if (!track->mdat_buf)
+            continue;
+        buf_size = avio_close_dyn_buf(track->mdat_buf, &buf);
+        track->mdat_buf = NULL;
+
+        avio_write(s->pb, buf, buf_size);
+        av_free(buf);
+    }
+
+    mov->mdat_size = 0;
+
+    avio_flush(s->pb);
+    return 0;
+}
+
+int ff_mov_write_packet(AVFormatContext *s, AVPacket *pkt)
+{
+    MOVMuxContext *mov = s->priv_data;
+    AVIOContext *pb = s->pb;
+    MOVTrack *trk = &mov->tracks[pkt->stream_index];
+    AVCodecContext *enc = trk->enc;
+    unsigned int samples_in_chunk = 0;
+    int size= pkt->size;
+    uint8_t *reformatted_data = NULL;
+
+    if (mov->flags & FF_MOV_FLAG_FRAGMENT) {
+        int ret;
+        if (mov->fragments > 0) {
+            if (!trk->mdat_buf) {
+                if ((ret = avio_open_dyn_buf(&trk->mdat_buf)) < 0)
+                    return ret;
+            }
+            pb = trk->mdat_buf;
+        } else {
+            if (!mov->mdat_buf) {
+                if ((ret = avio_open_dyn_buf(&mov->mdat_buf)) < 0)
+                    return ret;
+            }
+            pb = mov->mdat_buf;
+        }
+    }
+
+    if (enc->codec_id == AV_CODEC_ID_AMR_NB) {
+        /* We must find out how many AMR blocks there are in one packet */
+        static uint16_t packed_size[16] =
+            {13, 14, 16, 18, 20, 21, 27, 32, 6, 0, 0, 0, 0, 0, 0, 1};
+        int len = 0;
+
+        while (len < size && samples_in_chunk < 100) {
+            len += packed_size[(pkt->data[len] >> 3) & 0x0F];
+            samples_in_chunk++;
+        }
+        if (samples_in_chunk > 1) {
+            av_log(s, AV_LOG_ERROR, "fatal error, input is not a single packet, implement a AVParser for it\n");
+            return -1;
+        }
+    } else if (enc->codec_id == AV_CODEC_ID_ADPCM_MS ||
+               enc->codec_id == AV_CODEC_ID_ADPCM_IMA_WAV) {
+        samples_in_chunk = enc->frame_size;
+    } else if (trk->sample_size)
+        samples_in_chunk = size / trk->sample_size;
+    else
+        samples_in_chunk = 1;
+
+    /* copy extradata if it exists */
+    if (trk->vos_len == 0 && enc->extradata_size > 0) {
+        trk->vos_len = enc->extradata_size;
+        trk->vos_data = av_malloc(trk->vos_len);
+        memcpy(trk->vos_data, enc->extradata, trk->vos_len);
+    }
+
+    if (enc->codec_id == AV_CODEC_ID_H264 && trk->vos_len > 0 && *(uint8_t *)trk->vos_data != 1) {
+        /* from x264 or from bytestream h264 */
+        /* nal reformating needed */
+        if (trk->hint_track >= 0 && trk->hint_track < mov->nb_streams) {
+            ff_avc_parse_nal_units_buf(pkt->data, &reformatted_data,
+                                       &size);
+            avio_write(pb, reformatted_data, size);
+        } else {
+            size = ff_avc_parse_nal_units(pb, pkt->data, pkt->size);
+        }
+    } else if (enc->codec_id == AV_CODEC_ID_AAC && pkt->size > 2 &&
+               (AV_RB16(pkt->data) & 0xfff0) == 0xfff0) {
+        av_log(s, AV_LOG_ERROR, "malformated aac bitstream, use -absf aac_adtstoasc\n");
+        return -1;
+    } else {
+        avio_write(pb, pkt->data, size);
+    }
+
+    if ((enc->codec_id == AV_CODEC_ID_DNXHD ||
+         enc->codec_id == AV_CODEC_ID_AC3) && !trk->vos_len) {
+        /* copy frame to create needed atoms */
+        trk->vos_len = size;
+        trk->vos_data = av_malloc(size);
+        if (!trk->vos_data)
+            return AVERROR(ENOMEM);
+        memcpy(trk->vos_data, pkt->data, size);
+    }
+
+    if (!(trk->entry % MOV_INDEX_CLUSTER_SIZE)) {
+        trk->cluster = av_realloc_f(trk->cluster, sizeof(*trk->cluster), (trk->entry + MOV_INDEX_CLUSTER_SIZE));
+        if (!trk->cluster)
+            return -1;
+    }
+
+    trk->cluster[trk->entry].pos = avio_tell(pb) - size;
+    trk->cluster[trk->entry].samples_in_chunk = samples_in_chunk;
+    trk->cluster[trk->entry].chunkNum = 0;
+    trk->cluster[trk->entry].size = size;
+    trk->cluster[trk->entry].entries = samples_in_chunk;
+    trk->cluster[trk->entry].dts = pkt->dts;
+    if (!trk->entry && trk->start_dts != AV_NOPTS_VALUE) {
+        /* First packet of a new fragment. We already wrote the duration
+         * of the last packet of the previous fragment based on track_duration,
+         * which might not exactly match our dts. Therefore adjust the dts
+         * of this packet to be what the previous packets duration implies. */
+        trk->cluster[trk->entry].dts = trk->start_dts + trk->track_duration;
+    }
+    if (!trk->entry && trk->start_dts == AV_NOPTS_VALUE && !supports_edts(mov)) {
+        trk->cluster[trk->entry].dts = trk->start_dts = 0;
+    }
+    if (trk->start_dts == AV_NOPTS_VALUE)
+        trk->start_dts = pkt->dts;
+    trk->track_duration = pkt->dts - trk->start_dts + pkt->duration;
+    trk->last_sample_is_subtitle_end = 0;
+
+    if (pkt->pts == AV_NOPTS_VALUE) {
+        av_log(s, AV_LOG_WARNING, "pts has no value\n");
+        pkt->pts = pkt->dts;
+    }
+    if (pkt->dts != pkt->pts)
+        trk->flags |= MOV_TRACK_CTTS;
+    trk->cluster[trk->entry].cts = pkt->pts - pkt->dts;
+    trk->cluster[trk->entry].flags = 0;
+    if (enc->codec_id == AV_CODEC_ID_VC1) {
+        mov_parse_vc1_frame(pkt, trk, mov->fragments);
+    } else if (pkt->flags & AV_PKT_FLAG_KEY) {
+        if (mov->mode == MODE_MOV && enc->codec_id == AV_CODEC_ID_MPEG2VIDEO &&
+            trk->entry > 0) { // force sync sample for the first key frame
+            mov_parse_mpeg2_frame(pkt, &trk->cluster[trk->entry].flags);
+            if (trk->cluster[trk->entry].flags & MOV_PARTIAL_SYNC_SAMPLE)
+                trk->flags |= MOV_TRACK_STPS;
+        } else {
+            trk->cluster[trk->entry].flags = MOV_SYNC_SAMPLE;
+        }
+        if (trk->cluster[trk->entry].flags & MOV_SYNC_SAMPLE)
+            trk->has_keyframes++;
+    }
+    trk->entry++;
+    trk->sample_count += samples_in_chunk;
+    mov->mdat_size += size;
+
+    avio_flush(pb);
+
+    if (trk->hint_track >= 0 && trk->hint_track < mov->nb_streams)
+        ff_mov_add_hinted_packet(s, pkt, trk->hint_track, trk->entry,
+                                 reformatted_data, size);
+    av_free(reformatted_data);
+    return 0;
+}
+
+static int mov_write_single_packet(AVFormatContext *s, AVPacket *pkt)
+{
+        MOVMuxContext *mov = s->priv_data;
+        MOVTrack *trk = &mov->tracks[pkt->stream_index];
+        AVCodecContext *enc = trk->enc;
+        int64_t frag_duration = 0;
+        int size = pkt->size;
+
+        if (!pkt->size) return 0; /* Discard 0 sized packets */
+
+        if (trk->entry && pkt->stream_index < s->nb_streams)
+            frag_duration = av_rescale_q(pkt->dts - trk->cluster[0].dts,
+                                         s->streams[pkt->stream_index]->time_base,
+                                         AV_TIME_BASE_Q);
+        if ((mov->max_fragment_duration &&
+             frag_duration >= mov->max_fragment_duration) ||
+             (mov->max_fragment_size && mov->mdat_size + size >= mov->max_fragment_size) ||
+             (mov->flags & FF_MOV_FLAG_FRAG_KEYFRAME &&
+              enc->codec_type == AVMEDIA_TYPE_VIDEO &&
+              trk->entry && pkt->flags & AV_PKT_FLAG_KEY)) {
+            if (frag_duration >= mov->min_fragment_duration)
+                mov_flush_fragment(s);
+        }
+
+        return ff_mov_write_packet(s, pkt);
+}
+
+static int mov_write_subtitle_end_packet(AVFormatContext *s,
+                                         int stream_index,
+                                         int64_t dts) {
+    AVPacket end;
+    uint8_t data[2] = {0};
+    int ret;
+
+    av_init_packet(&end);
+    end.size = sizeof(data);
+    end.data = data;
+    end.pts = dts;
+    end.dts = dts;
+    end.duration = 0;
+    end.stream_index = stream_index;
+
+    ret = mov_write_single_packet(s, &end);
+    av_free_packet(&end);
+
+    return ret;
+}
+
+static int mov_write_packet(AVFormatContext *s, AVPacket *pkt)
+{
+    if (!pkt) {
+        mov_flush_fragment(s);
+        return 1;
+    } else {
+        int i;
+        MOVMuxContext *mov = s->priv_data;
+
+        if (!pkt->size) return 0; /* Discard 0 sized packets */
+
+        /*
+         * Subtitles require special handling.
+         *
+         * 1) For full complaince, every track must have a sample at
+         * dts == 0, which is rarely true for subtitles. So, as soon
+         * as we see any packet with dts > 0, write an empty subtitle
+         * at dts == 0 for any subtitle track with no samples in it.
+         *
+         * 2) For each subtitle track, check if the current packet's
+         * dts is past the duration of the last subtitle sample. If
+         * so, we now need to write an end sample for that subtitle.
+         *
+         * This must be done conditionally to allow for subtitles that
+         * immediately replace each other, in which case an end sample
+         * is not needed, and is, in fact, actively harmful.
+         *
+         * 3) See mov_write_trailer for how the final end sample is
+         * handled.
+         */
+        for (i = 0; i < mov->nb_streams; i++) {
+            MOVTrack *trk = &mov->tracks[i];
+            int ret;
+
+            if (trk->enc->codec_id == AV_CODEC_ID_MOV_TEXT &&
+                trk->track_duration < pkt->dts &&
+                (trk->entry == 0 || !trk->last_sample_is_subtitle_end)) {
+                ret = mov_write_subtitle_end_packet(s, i, trk->track_duration);
+                if (ret < 0) return ret;
+                trk->last_sample_is_subtitle_end = 1;
+            }
+        }
+
+        return mov_write_single_packet(s, pkt);
+    }
+}
+
+// QuickTime chapters involve an additional text track with the chapter names
+// as samples, and a tref pointing from the other tracks to the chapter one.
+static void mov_create_chapter_track(AVFormatContext *s, int tracknum)
+{
+    AVIOContext *pb;
+
+    MOVMuxContext *mov = s->priv_data;
+    MOVTrack *track = &mov->tracks[tracknum];
+    AVPacket pkt = { .stream_index = tracknum, .flags = AV_PKT_FLAG_KEY };
+    int i, len;
+
+    track->mode = mov->mode;
+    track->tag = MKTAG('t','e','x','t');
+    track->timescale = MOV_TIMESCALE;
+    track->enc = avcodec_alloc_context3(NULL);
+    track->enc->codec_type = AVMEDIA_TYPE_SUBTITLE;
+
+    if (avio_open_dyn_buf(&pb) >= 0) {
+        int size;
+        uint8_t *buf;
+
+        /* Stub header (usually for Quicktime chapter track) */
+        // TextSampleEntry
+        avio_wb32(pb, 0x01); // displayFlags
+        avio_w8(pb, 0x00);   // horizontal justification
+        avio_w8(pb, 0x00);   // vertical justification
+        avio_w8(pb, 0x00);   // bgColourRed
+        avio_w8(pb, 0x00);   // bgColourGreen
+        avio_w8(pb, 0x00);   // bgColourBlue
+        avio_w8(pb, 0x00);   // bgColourAlpha
+        // BoxRecord
+        avio_wb16(pb, 0x00); // defTextBoxTop
+        avio_wb16(pb, 0x00); // defTextBoxLeft
+        avio_wb16(pb, 0x00); // defTextBoxBottom
+        avio_wb16(pb, 0x00); // defTextBoxRight
+        // StyleRecord
+        avio_wb16(pb, 0x00); // startChar
+        avio_wb16(pb, 0x00); // endChar
+        avio_wb16(pb, 0x01); // fontID
+        avio_w8(pb, 0x00);   // fontStyleFlags
+        avio_w8(pb, 0x00);   // fontSize
+        avio_w8(pb, 0x00);   // fgColourRed
+        avio_w8(pb, 0x00);   // fgColourGreen
+        avio_w8(pb, 0x00);   // fgColourBlue
+        avio_w8(pb, 0x00);   // fgColourAlpha
+        // FontTableBox
+        avio_wb32(pb, 0x0D); // box size
+        ffio_wfourcc(pb, "ftab"); // box atom name
+        avio_wb16(pb, 0x01); // entry count
+        // FontRecord
+        avio_wb16(pb, 0x01); // font ID
+        avio_w8(pb, 0x00);   // font name length
+
+        if ((size = avio_close_dyn_buf(pb, &buf)) > 0) {
+            track->enc->extradata = buf;
+            track->enc->extradata_size = size;
+        } else {
+            av_free(&buf);
+        }
+    }
+
+    for (i = 0; i < s->nb_chapters; i++) {
+        AVChapter *c = s->chapters[i];
+        AVDictionaryEntry *t;
+
+        int64_t end = av_rescale_q(c->end, c->time_base, (AVRational){1,MOV_TIMESCALE});
+        pkt.pts = pkt.dts = av_rescale_q(c->start, c->time_base, (AVRational){1,MOV_TIMESCALE});
+        pkt.duration = end - pkt.dts;
+
+        if ((t = av_dict_get(c->metadata, "title", NULL, 0))) {
+            len = strlen(t->value);
+            pkt.size = len+2;
+            pkt.data = av_malloc(pkt.size);
+            AV_WB16(pkt.data, len);
+            memcpy(pkt.data+2, t->value, len);
+            ff_mov_write_packet(s, &pkt);
+            av_freep(&pkt.data);
+        }
+    }
+}
+
+static int mov_create_timecode_track(AVFormatContext *s, int index, int src_index, const char *tcstr)
+{
+    int ret;
+    MOVMuxContext *mov  = s->priv_data;
+    MOVTrack *track     = &mov->tracks[index];
+    AVStream *src_st    = s->streams[src_index];
+    AVTimecode tc;
+    AVPacket pkt    = {.stream_index = index, .flags = AV_PKT_FLAG_KEY, .size = 4};
+    AVRational rate = {src_st->codec->time_base.den, src_st->codec->time_base.num};
+
+    /* if the codec time base makes no sense, try to fallback on stream frame rate */
+    if (av_timecode_check_frame_rate(rate) < 0) {
+        av_log(s, AV_LOG_DEBUG, "timecode: tbc=%d/%d invalid, fallback on %d/%d\n",
+               rate.num, rate.den, src_st->avg_frame_rate.num, src_st->avg_frame_rate.den);
+        rate = src_st->avg_frame_rate;
+    }
+
+    /* compute the frame number */
+    ret = av_timecode_init_from_string(&tc, rate, tcstr, s);
+    if (ret < 0)
+        return ret;
+
+    /* tmcd track based on video stream */
+    track->mode      = mov->mode;
+    track->tag       = MKTAG('t','m','c','d');
+    track->src_track = src_index;
+    track->timescale = mov->tracks[src_index].timescale;
+    if (tc.flags & AV_TIMECODE_FLAG_DROPFRAME)
+        track->timecode_flags |= MOV_TIMECODE_FLAG_DROPFRAME;
+
+    /* encode context: tmcd data stream */
+    track->enc = avcodec_alloc_context3(NULL);
+    track->enc->codec_type = AVMEDIA_TYPE_DATA;
+    track->enc->codec_tag  = track->tag;
+    track->enc->time_base  = src_st->codec->time_base;
+
+    /* the tmcd track just contains one packet with the frame number */
+    pkt.data = av_malloc(pkt.size);
+    AV_WB32(pkt.data, tc.start);
+    ret = ff_mov_write_packet(s, &pkt);
+    av_free(pkt.data);
+    return ret;
+}
+
+static int mov_write_header(AVFormatContext *s)
+{
+    AVIOContext *pb = s->pb;
+    MOVMuxContext *mov = s->priv_data;
+    AVDictionaryEntry *t, *global_tcr = av_dict_get(s->metadata, "timecode", NULL, 0);
+    int i, hint_track = 0, tmcd_track = 0;
+
+    /* Set the FRAGMENT flag if any of the fragmentation methods are
+     * enabled. */
+    if (mov->max_fragment_duration || mov->max_fragment_size ||
+        mov->flags & (FF_MOV_FLAG_EMPTY_MOOV |
+                      FF_MOV_FLAG_FRAG_KEYFRAME |
+                      FF_MOV_FLAG_FRAG_CUSTOM))
+        mov->flags |= FF_MOV_FLAG_FRAGMENT;
+
+    /* faststart: moov at the beginning of the file, if supported */
+    if (mov->flags & FF_MOV_FLAG_FASTSTART) {
+        if (mov->flags & FF_MOV_FLAG_FRAGMENT)
+            mov->flags &= ~FF_MOV_FLAG_FASTSTART;
+        else
+            mov->reserved_moov_size = -1;
+    }
+
+    if (!supports_edts(mov) && s->avoid_negative_ts < 0) {
+        s->avoid_negative_ts = 1;
+    }
+
+    /* Non-seekable output is ok if using fragmentation. If ism_lookahead
+     * is enabled, we don't support non-seekable output at all. */
+    if (!s->pb->seekable &&
+        ((!(mov->flags & FF_MOV_FLAG_FRAGMENT) &&
+          !(s->oformat && !strcmp(s->oformat->name, "ismv")))
+         || mov->ism_lookahead)) {
+        av_log(s, AV_LOG_ERROR, "muxer does not support non seekable output\n");
+        return -1;
+    }
+
+    /* Default mode == MP4 */
+    mov->mode = MODE_MP4;
+
+    if (s->oformat != NULL) {
+        if (!strcmp("3gp", s->oformat->name)) mov->mode = MODE_3GP;
+        else if (!strcmp("3g2", s->oformat->name)) mov->mode = MODE_3GP|MODE_3G2;
+        else if (!strcmp("mov", s->oformat->name)) mov->mode = MODE_MOV;
+        else if (!strcmp("psp", s->oformat->name)) mov->mode = MODE_PSP;
+        else if (!strcmp("ipod",s->oformat->name)) mov->mode = MODE_IPOD;
+        else if (!strcmp("ismv",s->oformat->name)) mov->mode = MODE_ISM;
+        else if (!strcmp("f4v", s->oformat->name)) mov->mode = MODE_F4V;
+
+        mov_write_ftyp_tag(pb,s);
+        if (mov->mode == MODE_PSP) {
+            if (s->nb_streams != 2) {
+                av_log(s, AV_LOG_ERROR, "PSP mode need one video and one audio stream\n");
+                return -1;
+            }
+            mov_write_uuidprof_tag(pb,s);
+        }
+    }
+
+    mov->nb_streams = s->nb_streams;
+    if (mov->mode & (MODE_MOV|MODE_IPOD) && s->nb_chapters)
+        mov->chapter_track = mov->nb_streams++;
+
+    if (mov->flags & FF_MOV_FLAG_RTP_HINT) {
+        /* Add hint tracks for each audio and video stream */
+        hint_track = mov->nb_streams;
+        for (i = 0; i < s->nb_streams; i++) {
+            AVStream *st = s->streams[i];
+            if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
+                st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
+                mov->nb_streams++;
+            }
+        }
+    }
+
+    if (mov->mode == MODE_MOV) {
+        tmcd_track = mov->nb_streams;
+
+        /* +1 tmcd track for each video stream with a timecode */
+        for (i = 0; i < s->nb_streams; i++) {
+            AVStream *st = s->streams[i];
+            if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
+                (global_tcr || av_dict_get(st->metadata, "timecode", NULL, 0)))
+                mov->nb_meta_tmcd++;
+        }
+
+        /* check if there is already a tmcd track to remux */
+        if (mov->nb_meta_tmcd) {
+            for (i = 0; i < s->nb_streams; i++) {
+                AVStream *st = s->streams[i];
+                if (st->codec->codec_tag == MKTAG('t','m','c','d')) {
+                    av_log(s, AV_LOG_WARNING, "You requested a copy of the original timecode track "
+                           "so timecode metadata are now ignored\n");
+                    mov->nb_meta_tmcd = 0;
+                }
+            }
+        }
+
+        mov->nb_streams += mov->nb_meta_tmcd;
+    }
+
+    mov->tracks = av_mallocz(mov->nb_streams*sizeof(*mov->tracks));
+    if (!mov->tracks)
+        return AVERROR(ENOMEM);
+
+    for(i=0; i<s->nb_streams; i++){
+        AVStream *st= s->streams[i];
+        MOVTrack *track= &mov->tracks[i];
+        AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL,0);
+
+        track->enc = st->codec;
+        track->language = ff_mov_iso639_to_lang(lang?lang->value:"und", mov->mode!=MODE_MOV);
+        if (track->language < 0)
+            track->language = 0;
+        track->mode = mov->mode;
+        track->tag = mov_find_codec_tag(s, track);
+        if (!track->tag) {
+            av_log(s, AV_LOG_ERROR, "track %d: could not find tag, "
+                   "codec not currently supported in container\n", i);
+            goto error;
+        }
+        /* If hinting of this track is enabled by a later hint track,
+         * this is updated. */
+        track->hint_track = -1;
+        track->start_dts = AV_NOPTS_VALUE;
+        if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO){
+            if (track->tag == MKTAG('m','x','3','p') || track->tag == MKTAG('m','x','3','n') ||
+                track->tag == MKTAG('m','x','4','p') || track->tag == MKTAG('m','x','4','n') ||
+                track->tag == MKTAG('m','x','5','p') || track->tag == MKTAG('m','x','5','n')) {
+                if (st->codec->width != 720 || (st->codec->height != 608 && st->codec->height != 512)) {
+                    av_log(s, AV_LOG_ERROR, "D-10/IMX must use 720x608 or 720x512 video resolution\n");
+                    goto error;
+                }
+                track->height = track->tag>>24 == 'n' ? 486 : 576;
+            }
+            track->timescale = st->codec->time_base.den;
+            while(track->timescale < 10000)
+                track->timescale *= 2;
+            if (track->mode == MODE_MOV && track->timescale > 100000)
+                av_log(s, AV_LOG_WARNING,
+                       "WARNING codec timebase is very high. If duration is too long,\n"
+                       "file may not be playable by quicktime. Specify a shorter timebase\n"
+                       "or choose different container.\n");
+        }else if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO){
+            track->timescale = st->codec->sample_rate;
+            if(!st->codec->frame_size && !av_get_bits_per_sample(st->codec->codec_id)) {
+                av_log(s, AV_LOG_WARNING, "track %d: codec frame size is not set\n", i);
+                track->audio_vbr = 1;
+            }else if(st->codec->codec_id == AV_CODEC_ID_ADPCM_MS ||
+                     st->codec->codec_id == AV_CODEC_ID_ADPCM_IMA_WAV ||
+                     st->codec->codec_id == AV_CODEC_ID_ILBC){
+                if (!st->codec->block_align) {
+                    av_log(s, AV_LOG_ERROR, "track %d: codec block align is not set for adpcm\n", i);
+                    goto error;
+                }
+                track->sample_size = st->codec->block_align;
+            }else if(st->codec->frame_size > 1){ /* assume compressed audio */
+                track->audio_vbr = 1;
+            }else{
+                track->sample_size = (av_get_bits_per_sample(st->codec->codec_id) >> 3) * st->codec->channels;
+            }
+            if (track->mode != MODE_MOV &&
+                track->enc->codec_id == AV_CODEC_ID_MP3 && track->timescale < 16000) {
+                av_log(s, AV_LOG_ERROR, "track %d: muxing mp3 at %dhz is not supported\n",
+                       i, track->enc->sample_rate);
+                goto error;
+            }
+        }else if(st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE){
+            track->timescale = st->codec->time_base.den;
+        }else{
+            track->timescale = MOV_TIMESCALE;
+        }
+        if (!track->height)
+            track->height = st->codec->height;
+        /* The ism specific timescale isn't mandatory, but is assumed by
+         * some tools, such as mp4split. */
+        if (mov->mode == MODE_ISM)
+            track->timescale = 10000000;
+
+        avpriv_set_pts_info(st, 64, 1, track->timescale);
+
+        /* copy extradata if it exists */
+        if (st->codec->extradata_size) {
+            track->vos_len  = st->codec->extradata_size;
+            track->vos_data = av_malloc(track->vos_len);
+            memcpy(track->vos_data, st->codec->extradata, track->vos_len);
+        }
+    }
+
+    if (mov->mode == MODE_ISM) {
+        /* If no fragmentation options have been set, set a default. */
+        if (!(mov->flags & (FF_MOV_FLAG_FRAG_KEYFRAME |
+                            FF_MOV_FLAG_FRAG_CUSTOM)) &&
+            !mov->max_fragment_duration && !mov->max_fragment_size)
+            mov->max_fragment_duration = 5000000;
+        mov->flags |= FF_MOV_FLAG_EMPTY_MOOV | FF_MOV_FLAG_SEPARATE_MOOF |
+                      FF_MOV_FLAG_FRAGMENT;
+    }
+
+    if(mov->reserved_moov_size){
+        mov->reserved_moov_pos= avio_tell(pb);
+        if (mov->reserved_moov_size > 0)
+            avio_skip(pb, mov->reserved_moov_size);
+    }
+
+    if (!(mov->flags & FF_MOV_FLAG_FRAGMENT))
+        mov_write_mdat_tag(pb, mov);
+
+    if (t = av_dict_get(s->metadata, "creation_time", NULL, 0))
+        mov->time = ff_iso8601_to_unix_time(t->value);
+    if (mov->time)
+        mov->time += 0x7C25B080; // 1970 based -> 1904 based
+
+    if (mov->chapter_track)
+        mov_create_chapter_track(s, mov->chapter_track);
+
+    if (mov->flags & FF_MOV_FLAG_RTP_HINT) {
+        /* Initialize the hint tracks for each audio and video stream */
+        for (i = 0; i < s->nb_streams; i++) {
+            AVStream *st = s->streams[i];
+            if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
+                st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
+                ff_mov_init_hinting(s, hint_track, i);
+                hint_track++;
+            }
+        }
+    }
+
+    if (mov->nb_meta_tmcd) {
+        /* Initialize the tmcd tracks */
+        for (i = 0; i < s->nb_streams; i++) {
+            AVStream *st = s->streams[i];
+            t = global_tcr;
+
+            if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
+                if (!t)
+                    t = av_dict_get(st->metadata, "timecode", NULL, 0);
+                if (!t)
+                    continue;
+                if (mov_create_timecode_track(s, tmcd_track, i, t->value) < 0)
+                    goto error;
+                tmcd_track++;
+            }
+        }
+    }
+
+    avio_flush(pb);
+
+    if (mov->flags & FF_MOV_FLAG_ISML)
+        mov_write_isml_manifest(pb, mov);
+
+    if (mov->flags & FF_MOV_FLAG_EMPTY_MOOV) {
+        mov_write_moov_tag(pb, mov, s);
+        mov->fragments++;
+    }
+
+    return 0;
+ error:
+    av_freep(&mov->tracks);
+    return -1;
+}
+
+/**
+ * This function gets the moov size if moved to the top of the file: the chunk
+ * offset table can switch between stco (32-bit entries) to co64 (64-bit
+ * entries) when the moov is moved to the top, so the size of the moov would
+ * change. It also updates the chunk offset tables.
+ */
+static int compute_moov_size(AVFormatContext *s)
+{
+    int i, moov_size, moov_size2;
+    MOVMuxContext *mov = s->priv_data;
+
+    moov_size = get_moov_size(s);
+    if (moov_size < 0)
+        return moov_size;
+
+    for (i = 0; i < mov->nb_streams; i++)
+        mov->tracks[i].data_offset += moov_size;
+
+    moov_size2 = get_moov_size(s);
+    if (moov_size2 < 0)
+        return moov_size2;
+
+    /* if the size changed, we just switched from stco to co64 and needs to
+     * update the offsets */
+    if (moov_size2 != moov_size)
+        for (i = 0; i < mov->nb_streams; i++)
+            mov->tracks[i].data_offset += moov_size2 - moov_size;
+
+    return moov_size2;
+}
+
+static int shift_data(AVFormatContext *s)
+{
+    int ret = 0, moov_size;
+    MOVMuxContext *mov = s->priv_data;
+    int64_t pos, pos_end = avio_tell(s->pb);
+    uint8_t *buf, *read_buf[2];
+    int read_buf_id = 0;
+    int read_size[2];
+    AVIOContext *read_pb;
+
+    moov_size = compute_moov_size(s);
+    if (moov_size < 0)
+        return moov_size;
+
+    buf = av_malloc(moov_size * 2);
+    if (!buf)
+        return AVERROR(ENOMEM);
+    read_buf[0] = buf;
+    read_buf[1] = buf + moov_size;
+
+    /* Shift the data: the AVIO context of the output can only be used for
+     * writing, so we re-open the same output, but for reading. It also avoids
+     * a read/seek/write/seek back and forth. */
+    avio_flush(s->pb);
+    ret = avio_open(&read_pb, s->filename, AVIO_FLAG_READ);
+    if (ret < 0) {
+        av_log(s, AV_LOG_ERROR, "Unable to re-open %s output file for "
+               "the second pass (faststart)\n", s->filename);
+        goto end;
+    }
+
+    /* mark the end of the shift to up to the last data we wrote, and get ready
+     * for writing */
+    pos_end = avio_tell(s->pb);
+    avio_seek(s->pb, mov->reserved_moov_pos + moov_size, SEEK_SET);
+
+    /* start reading at where the new moov will be placed */
+    avio_seek(read_pb, mov->reserved_moov_pos, SEEK_SET);
+    pos = avio_tell(read_pb);
+
+#define READ_BLOCK do {                                                             \
+    read_size[read_buf_id] = avio_read(read_pb, read_buf[read_buf_id], moov_size);  \
+    read_buf_id ^= 1;                                                               \
+} while (0)
+
+    /* shift data by chunk of at most moov_size */
+    READ_BLOCK;
+    do {
+        int n;
+        READ_BLOCK;
+        n = read_size[read_buf_id];
+        if (n <= 0)
+            break;
+        avio_write(s->pb, read_buf[read_buf_id], n);
+        pos += n;
+    } while (pos < pos_end);
+    avio_close(read_pb);
+
+end:
+    av_free(buf);
+    return ret;
+}
+
+static int mov_write_trailer(AVFormatContext *s)
+{
+    MOVMuxContext *mov = s->priv_data;
+    AVIOContext *pb = s->pb;
+    int64_t moov_pos;
+    int res = 0;
+    int i;
+
+    /*
+     * Before actually writing the trailer, make sure that there are no
+     * dangling subtitles, that need a terminating sample.
+     */
+    for (i = 0; i < mov->nb_streams; i++) {
+        MOVTrack *trk = &mov->tracks[i];
+        if (trk->enc->codec_id == AV_CODEC_ID_MOV_TEXT &&
+            !trk->last_sample_is_subtitle_end) {
+            mov_write_subtitle_end_packet(s, i, trk->track_duration);
+            trk->last_sample_is_subtitle_end = 1;
+        }
+    }
+
+    moov_pos = avio_tell(pb);
+
+    if (!(mov->flags & FF_MOV_FLAG_FRAGMENT)) {
+        /* Write size of mdat tag */
+        if (mov->mdat_size + 8 <= UINT32_MAX) {
+            avio_seek(pb, mov->mdat_pos, SEEK_SET);
+            avio_wb32(pb, mov->mdat_size + 8);
+        } else {
+            /* overwrite 'wide' placeholder atom */
+            avio_seek(pb, mov->mdat_pos - 8, SEEK_SET);
+            /* special value: real atom size will be 64 bit value after
+             * tag field */
+            avio_wb32(pb, 1);
+            ffio_wfourcc(pb, "mdat");
+            avio_wb64(pb, mov->mdat_size + 16);
+        }
+        avio_seek(pb, mov->reserved_moov_size > 0 ? mov->reserved_moov_pos : moov_pos, SEEK_SET);
+
+        if (mov->reserved_moov_size == -1) {
+            av_log(s, AV_LOG_INFO, "Starting second pass: moving header on top of the file\n");
+            res = shift_data(s);
+            if (res == 0) {
+                avio_seek(s->pb, mov->reserved_moov_pos, SEEK_SET);
+                mov_write_moov_tag(pb, mov, s);
+            }
+        } else if (mov->reserved_moov_size > 0) {
+            int64_t size;
+            mov_write_moov_tag(pb, mov, s);
+            size = mov->reserved_moov_size - (avio_tell(pb) - mov->reserved_moov_pos);
+            if(size < 8){
+                av_log(s, AV_LOG_ERROR, "reserved_moov_size is too small, needed %"PRId64" additional\n", 8-size);
+                return -1;
+            }
+            avio_wb32(pb, size);
+            ffio_wfourcc(pb, "free");
+            for(i=0; i<size; i++)
+                avio_w8(pb, 0);
+            avio_seek(pb, moov_pos, SEEK_SET);
+        } else {
+            mov_write_moov_tag(pb, mov, s);
+        }
+    } else {
+        mov_flush_fragment(s);
+        mov_write_mfra_tag(pb, mov);
+    }
+
+    if (mov->chapter_track)
+        av_freep(&mov->tracks[mov->chapter_track].enc);
+
+    for (i=0; i<mov->nb_streams; i++) {
+        if (mov->tracks[i].tag == MKTAG('r','t','p',' '))
+            ff_mov_close_hinting(&mov->tracks[i]);
+        else if (mov->tracks[i].tag == MKTAG('t','m','c','d') && mov->nb_meta_tmcd)
+            av_freep(&mov->tracks[i].enc);
+        if (mov->flags & FF_MOV_FLAG_FRAGMENT &&
+            mov->tracks[i].vc1_info.struct_offset && s->pb->seekable) {
+            int64_t off = avio_tell(pb);
+            uint8_t buf[7];
+            if (mov_write_dvc1_structs(&mov->tracks[i], buf) >= 0) {
+                avio_seek(pb, mov->tracks[i].vc1_info.struct_offset, SEEK_SET);
+                avio_write(pb, buf, 7);
+                avio_seek(pb, off, SEEK_SET);
+            }
+        }
+        av_freep(&mov->tracks[i].cluster);
+        av_freep(&mov->tracks[i].frag_info);
+
+        if (mov->tracks[i].vos_len)
+            av_free(mov->tracks[i].vos_data);
+
+    }
+
+    av_freep(&mov->tracks);
+
+    return res;
+}
+
+#if CONFIG_MOV_MUXER
+MOV_CLASS(mov)
+AVOutputFormat ff_mov_muxer = {
+    .name              = "mov",
+    .long_name         = NULL_IF_CONFIG_SMALL("QuickTime / MOV"),
+    .extensions        = "mov",
+    .priv_data_size    = sizeof(MOVMuxContext),
+    .audio_codec       = AV_CODEC_ID_AAC,
+    .video_codec       = CONFIG_LIBX264_ENCODER ?
+                         AV_CODEC_ID_H264 : AV_CODEC_ID_MPEG4,
+    .write_header      = mov_write_header,
+    .write_packet      = mov_write_packet,
+    .write_trailer     = mov_write_trailer,
+    .flags             = AVFMT_GLOBALHEADER | AVFMT_ALLOW_FLUSH,
+    .codec_tag         = (const AVCodecTag* const []){
+        ff_codec_movvideo_tags, ff_codec_movaudio_tags, 0
+    },
+    .priv_class        = &mov_muxer_class,
+};
+#endif
+#if CONFIG_TGP_MUXER
+MOV_CLASS(tgp)
+AVOutputFormat ff_tgp_muxer = {
+    .name              = "3gp",
+    .long_name         = NULL_IF_CONFIG_SMALL("3GP (3GPP file format)"),
+    .extensions        = "3gp",
+    .priv_data_size    = sizeof(MOVMuxContext),
+    .audio_codec       = AV_CODEC_ID_AMR_NB,
+    .video_codec       = AV_CODEC_ID_H263,
+    .write_header      = mov_write_header,
+    .write_packet      = mov_write_packet,
+    .write_trailer     = mov_write_trailer,
+    .flags             = AVFMT_GLOBALHEADER | AVFMT_ALLOW_FLUSH,
+    .codec_tag         = (const AVCodecTag* const []){ codec_3gp_tags, 0 },
+    .priv_class        = &tgp_muxer_class,
+};
+#endif
+#if CONFIG_MP4_MUXER
+MOV_CLASS(mp4)
+AVOutputFormat ff_mp4_muxer = {
+    .name              = "mp4",
+    .long_name         = NULL_IF_CONFIG_SMALL("MP4 (MPEG-4 Part 14)"),
+    .mime_type         = "application/mp4",
+    .extensions        = "mp4",
+    .priv_data_size    = sizeof(MOVMuxContext),
+    .audio_codec       = AV_CODEC_ID_AAC,
+    .video_codec       = CONFIG_LIBX264_ENCODER ?
+                         AV_CODEC_ID_H264 : AV_CODEC_ID_MPEG4,
+    .write_header      = mov_write_header,
+    .write_packet      = mov_write_packet,
+    .write_trailer     = mov_write_trailer,
+    .flags             = AVFMT_GLOBALHEADER | AVFMT_ALLOW_FLUSH,
+    .codec_tag         = (const AVCodecTag* const []){ ff_mp4_obj_type, 0 },
+    .priv_class        = &mp4_muxer_class,
+};
+#endif
+#if CONFIG_PSP_MUXER
+MOV_CLASS(psp)
+AVOutputFormat ff_psp_muxer = {
+    .name              = "psp",
+    .long_name         = NULL_IF_CONFIG_SMALL("PSP MP4 (MPEG-4 Part 14)"),
+    .extensions        = "mp4,psp",
+    .priv_data_size    = sizeof(MOVMuxContext),
+    .audio_codec       = AV_CODEC_ID_AAC,
+    .video_codec       = CONFIG_LIBX264_ENCODER ?
+                         AV_CODEC_ID_H264 : AV_CODEC_ID_MPEG4,
+    .write_header      = mov_write_header,
+    .write_packet      = mov_write_packet,
+    .write_trailer     = mov_write_trailer,
+    .flags             = AVFMT_GLOBALHEADER | AVFMT_ALLOW_FLUSH,
+    .codec_tag         = (const AVCodecTag* const []){ ff_mp4_obj_type, 0 },
+    .priv_class        = &psp_muxer_class,
+};
+#endif
+#if CONFIG_TG2_MUXER
+MOV_CLASS(tg2)
+AVOutputFormat ff_tg2_muxer = {
+    .name              = "3g2",
+    .long_name         = NULL_IF_CONFIG_SMALL("3GP2 (3GPP2 file format)"),
+    .extensions        = "3g2",
+    .priv_data_size    = sizeof(MOVMuxContext),
+    .audio_codec       = AV_CODEC_ID_AMR_NB,
+    .video_codec       = AV_CODEC_ID_H263,
+    .write_header      = mov_write_header,
+    .write_packet      = mov_write_packet,
+    .write_trailer     = mov_write_trailer,
+    .flags             = AVFMT_GLOBALHEADER | AVFMT_ALLOW_FLUSH,
+    .codec_tag         = (const AVCodecTag* const []){ codec_3gp_tags, 0 },
+    .priv_class        = &tg2_muxer_class,
+};
+#endif
+#if CONFIG_IPOD_MUXER
+MOV_CLASS(ipod)
+AVOutputFormat ff_ipod_muxer = {
+    .name              = "ipod",
+    .long_name         = NULL_IF_CONFIG_SMALL("iPod H.264 MP4 (MPEG-4 Part 14)"),
+    .mime_type         = "application/mp4",
+    .extensions        = "m4v,m4a",
+    .priv_data_size    = sizeof(MOVMuxContext),
+    .audio_codec       = AV_CODEC_ID_AAC,
+    .video_codec       = AV_CODEC_ID_H264,
+    .write_header      = mov_write_header,
+    .write_packet      = mov_write_packet,
+    .write_trailer     = mov_write_trailer,
+    .flags             = AVFMT_GLOBALHEADER | AVFMT_ALLOW_FLUSH,
+    .codec_tag         = (const AVCodecTag* const []){ codec_ipod_tags, 0 },
+    .priv_class        = &ipod_muxer_class,
+};
+#endif
+#if CONFIG_ISMV_MUXER
+MOV_CLASS(ismv)
+AVOutputFormat ff_ismv_muxer = {
+    .name              = "ismv",
+    .long_name         = NULL_IF_CONFIG_SMALL("ISMV/ISMA (Smooth Streaming)"),
+    .mime_type         = "application/mp4",
+    .extensions        = "ismv,isma",
+    .priv_data_size    = sizeof(MOVMuxContext),
+    .audio_codec       = AV_CODEC_ID_AAC,
+    .video_codec       = AV_CODEC_ID_H264,
+    .write_header      = mov_write_header,
+    .write_packet      = mov_write_packet,
+    .write_trailer     = mov_write_trailer,
+    .flags             = AVFMT_GLOBALHEADER | AVFMT_ALLOW_FLUSH,
+    .codec_tag         = (const AVCodecTag* const []){ ff_mp4_obj_type, 0 },
+    .priv_class        = &ismv_muxer_class,
+};
+#endif
+#if CONFIG_F4V_MUXER
+MOV_CLASS(f4v)
+AVOutputFormat ff_f4v_muxer = {
+    .name              = "f4v",
+    .long_name         = NULL_IF_CONFIG_SMALL("F4V Adobe Flash Video"),
+    .mime_type         = "application/f4v",
+    .extensions        = "f4v",
+    .priv_data_size    = sizeof(MOVMuxContext),
+    .audio_codec       = AV_CODEC_ID_AAC,
+    .video_codec       = AV_CODEC_ID_H264,
+    .write_header      = mov_write_header,
+    .write_packet      = mov_write_packet,
+    .write_trailer     = mov_write_trailer,
+    .flags             = AVFMT_GLOBALHEADER | AVFMT_ALLOW_FLUSH,
+    .codec_tag         = (const AVCodecTag* const []){ codec_f4v_tags, 0 },
+    .priv_class        = &f4v_muxer_class,
+};
+#endif
-- 
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