diff options
Diffstat (limited to 'ffmpeg1/libavformat/flvenc.c')
| -rw-r--r-- | ffmpeg1/libavformat/flvenc.c | 591 |
1 files changed, 591 insertions, 0 deletions
diff --git a/ffmpeg1/libavformat/flvenc.c b/ffmpeg1/libavformat/flvenc.c new file mode 100644 index 0000000..502da0f --- /dev/null +++ b/ffmpeg1/libavformat/flvenc.c @@ -0,0 +1,591 @@ +/* + * FLV muxer + * Copyright (c) 2003 The FFmpeg Project + * + * 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 "libavutil/intreadwrite.h" +#include "libavutil/dict.h" +#include "libavutil/intfloat.h" +#include "libavutil/avassert.h" +#include "avc.h" +#include "avformat.h" +#include "flv.h" +#include "internal.h" +#include "metadata.h" + + +static const AVCodecTag flv_video_codec_ids[] = { + { AV_CODEC_ID_FLV1, FLV_CODECID_H263 }, + { AV_CODEC_ID_H263, FLV_CODECID_REALH263 }, + { AV_CODEC_ID_MPEG4, FLV_CODECID_MPEG4 }, + { AV_CODEC_ID_FLASHSV, FLV_CODECID_SCREEN }, + { AV_CODEC_ID_FLASHSV2, FLV_CODECID_SCREEN2 }, + { AV_CODEC_ID_VP6F, FLV_CODECID_VP6 }, + { AV_CODEC_ID_VP6, FLV_CODECID_VP6 }, + { AV_CODEC_ID_VP6A, FLV_CODECID_VP6A }, + { AV_CODEC_ID_H264, FLV_CODECID_H264 }, + { AV_CODEC_ID_NONE, 0 } +}; + +static const AVCodecTag flv_audio_codec_ids[] = { + { AV_CODEC_ID_MP3, FLV_CODECID_MP3 >> FLV_AUDIO_CODECID_OFFSET }, + { AV_CODEC_ID_PCM_U8, FLV_CODECID_PCM >> FLV_AUDIO_CODECID_OFFSET }, + { AV_CODEC_ID_PCM_S16BE, FLV_CODECID_PCM >> FLV_AUDIO_CODECID_OFFSET }, + { AV_CODEC_ID_PCM_S16LE, FLV_CODECID_PCM_LE >> FLV_AUDIO_CODECID_OFFSET }, + { AV_CODEC_ID_ADPCM_SWF, FLV_CODECID_ADPCM >> FLV_AUDIO_CODECID_OFFSET }, + { AV_CODEC_ID_AAC, FLV_CODECID_AAC >> FLV_AUDIO_CODECID_OFFSET }, + { AV_CODEC_ID_NELLYMOSER, FLV_CODECID_NELLYMOSER >> FLV_AUDIO_CODECID_OFFSET }, + { AV_CODEC_ID_PCM_MULAW, FLV_CODECID_PCM_MULAW >> FLV_AUDIO_CODECID_OFFSET }, + { AV_CODEC_ID_PCM_ALAW, FLV_CODECID_PCM_ALAW >> FLV_AUDIO_CODECID_OFFSET }, + { AV_CODEC_ID_SPEEX, FLV_CODECID_SPEEX >> FLV_AUDIO_CODECID_OFFSET }, + { AV_CODEC_ID_NONE, 0 } +}; + +typedef struct FLVContext { + int reserved; + int64_t duration_offset; + int64_t filesize_offset; + int64_t duration; + int64_t delay; ///< first dts delay (needed for AVC & Speex) +} FLVContext; + +typedef struct FLVStreamContext { + int64_t last_ts; ///< last timestamp for each stream +} FLVStreamContext; + +static int get_audio_flags(AVFormatContext *s, AVCodecContext *enc) +{ + int flags = (enc->bits_per_coded_sample == 16) ? FLV_SAMPLESSIZE_16BIT + : FLV_SAMPLESSIZE_8BIT; + + if (enc->codec_id == AV_CODEC_ID_AAC) // specs force these parameters + return FLV_CODECID_AAC | FLV_SAMPLERATE_44100HZ | + FLV_SAMPLESSIZE_16BIT | FLV_STEREO; + else if (enc->codec_id == AV_CODEC_ID_SPEEX) { + if (enc->sample_rate != 16000) { + av_log(s, AV_LOG_ERROR, + "FLV only supports wideband (16kHz) Speex audio\n"); + return AVERROR(EINVAL); + } + if (enc->channels != 1) { + av_log(s, AV_LOG_ERROR, "FLV only supports mono Speex audio\n"); + return AVERROR(EINVAL); + } + return FLV_CODECID_SPEEX | FLV_SAMPLERATE_11025HZ | FLV_SAMPLESSIZE_16BIT; + } else { + switch (enc->sample_rate) { + case 44100: + flags |= FLV_SAMPLERATE_44100HZ; + break; + case 22050: + flags |= FLV_SAMPLERATE_22050HZ; + break; + case 11025: + flags |= FLV_SAMPLERATE_11025HZ; + break; + case 16000: // nellymoser only + case 8000: // nellymoser only + case 5512: // not MP3 + if (enc->codec_id != AV_CODEC_ID_MP3) { + flags |= FLV_SAMPLERATE_SPECIAL; + break; + } + default: + av_log(s, AV_LOG_ERROR, + "FLV does not support sample rate %d, " + "choose from (44100, 22050, 11025)\n", enc->sample_rate); + return AVERROR(EINVAL); + } + } + + if (enc->channels > 1) + flags |= FLV_STEREO; + + switch (enc->codec_id) { + case AV_CODEC_ID_MP3: + flags |= FLV_CODECID_MP3 | FLV_SAMPLESSIZE_16BIT; + break; + case AV_CODEC_ID_PCM_U8: + flags |= FLV_CODECID_PCM | FLV_SAMPLESSIZE_8BIT; + break; + case AV_CODEC_ID_PCM_S16BE: + flags |= FLV_CODECID_PCM | FLV_SAMPLESSIZE_16BIT; + break; + case AV_CODEC_ID_PCM_S16LE: + flags |= FLV_CODECID_PCM_LE | FLV_SAMPLESSIZE_16BIT; + break; + case AV_CODEC_ID_ADPCM_SWF: + flags |= FLV_CODECID_ADPCM | FLV_SAMPLESSIZE_16BIT; + break; + case AV_CODEC_ID_NELLYMOSER: + if (enc->sample_rate == 8000) + flags |= FLV_CODECID_NELLYMOSER_8KHZ_MONO | FLV_SAMPLESSIZE_16BIT; + else if (enc->sample_rate == 16000) + flags |= FLV_CODECID_NELLYMOSER_16KHZ_MONO | FLV_SAMPLESSIZE_16BIT; + else + flags |= FLV_CODECID_NELLYMOSER | FLV_SAMPLESSIZE_16BIT; + break; + case AV_CODEC_ID_PCM_MULAW: + flags = FLV_CODECID_PCM_MULAW | FLV_SAMPLERATE_SPECIAL | FLV_SAMPLESSIZE_16BIT; + break; + case AV_CODEC_ID_PCM_ALAW: + flags = FLV_CODECID_PCM_ALAW | FLV_SAMPLERATE_SPECIAL | FLV_SAMPLESSIZE_16BIT; + break; + case 0: + flags |= enc->codec_tag << 4; + break; + default: + av_log(s, AV_LOG_ERROR, "Audio codec '%s' not compatible with FLV\n", + avcodec_get_name(enc->codec_id)); + return AVERROR(EINVAL); + } + + return flags; +} + +static void put_amf_string(AVIOContext *pb, const char *str) +{ + size_t len = strlen(str); + avio_wb16(pb, len); + avio_write(pb, str, len); +} + +static void put_avc_eos_tag(AVIOContext *pb, unsigned ts) +{ + avio_w8(pb, FLV_TAG_TYPE_VIDEO); + avio_wb24(pb, 5); /* Tag Data Size */ + avio_wb24(pb, ts); /* lower 24 bits of timestamp in ms */ + avio_w8(pb, (ts >> 24) & 0x7F); /* MSB of ts in ms */ + avio_wb24(pb, 0); /* StreamId = 0 */ + avio_w8(pb, 23); /* ub[4] FrameType = 1, ub[4] CodecId = 7 */ + avio_w8(pb, 2); /* AVC end of sequence */ + avio_wb24(pb, 0); /* Always 0 for AVC EOS. */ + avio_wb32(pb, 16); /* Size of FLV tag */ +} + +static void put_amf_double(AVIOContext *pb, double d) +{ + avio_w8(pb, AMF_DATA_TYPE_NUMBER); + avio_wb64(pb, av_double2int(d)); +} + +static void put_amf_bool(AVIOContext *pb, int b) +{ + avio_w8(pb, AMF_DATA_TYPE_BOOL); + avio_w8(pb, !!b); +} + +static int flv_write_header(AVFormatContext *s) +{ + AVIOContext *pb = s->pb; + FLVContext *flv = s->priv_data; + AVCodecContext *audio_enc = NULL, *video_enc = NULL, *data_enc = NULL; + int i, metadata_count = 0; + double framerate = 0.0; + int64_t metadata_size_pos, data_size, metadata_count_pos; + AVDictionaryEntry *tag = NULL; + + for (i = 0; i < s->nb_streams; i++) { + AVCodecContext *enc = s->streams[i]->codec; + FLVStreamContext *sc; + switch (enc->codec_type) { + case AVMEDIA_TYPE_VIDEO: + if (s->streams[i]->avg_frame_rate.den && + s->streams[i]->avg_frame_rate.num) { + framerate = av_q2d(s->streams[i]->avg_frame_rate); + } else { + framerate = 1 / av_q2d(s->streams[i]->codec->time_base); + } + video_enc = enc; + if (enc->codec_tag == 0) { + av_log(s, AV_LOG_ERROR, "Video codec '%s' for stream %d is not compatible with FLV\n", + avcodec_get_name(enc->codec_id), i); + return AVERROR(EINVAL); + } + break; + case AVMEDIA_TYPE_AUDIO: + audio_enc = enc; + if (get_audio_flags(s, enc) < 0) + return AVERROR_INVALIDDATA; + break; + case AVMEDIA_TYPE_DATA: + if (enc->codec_id != AV_CODEC_ID_TEXT) { + av_log(s, AV_LOG_ERROR, "Data codec '%s' for stream %d is not compatible with FLV\n", + avcodec_get_name(enc->codec_id), i); + return AVERROR_INVALIDDATA; + } + data_enc = enc; + break; + default: + av_log(s, AV_LOG_ERROR, "Codec type '%s' for stream %d is not compatible with FLV\n", + av_get_media_type_string(enc->codec_type), i); + return AVERROR(EINVAL); + } + avpriv_set_pts_info(s->streams[i], 32, 1, 1000); /* 32 bit pts in ms */ + + sc = av_mallocz(sizeof(FLVStreamContext)); + if (!sc) + return AVERROR(ENOMEM); + s->streams[i]->priv_data = sc; + sc->last_ts = -1; + } + + flv->delay = AV_NOPTS_VALUE; + + avio_write(pb, "FLV", 3); + avio_w8(pb, 1); + avio_w8(pb, FLV_HEADER_FLAG_HASAUDIO * !!audio_enc + + FLV_HEADER_FLAG_HASVIDEO * !!video_enc); + avio_wb32(pb, 9); + avio_wb32(pb, 0); + + for (i = 0; i < s->nb_streams; i++) + if (s->streams[i]->codec->codec_tag == 5) { + avio_w8(pb, 8); // message type + avio_wb24(pb, 0); // include flags + avio_wb24(pb, 0); // time stamp + avio_wb32(pb, 0); // reserved + avio_wb32(pb, 11); // size + flv->reserved = 5; + } + + /* write meta_tag */ + avio_w8(pb, 18); // tag type META + metadata_size_pos = avio_tell(pb); + avio_wb24(pb, 0); // size of data part (sum of all parts below) + avio_wb24(pb, 0); // timestamp + avio_wb32(pb, 0); // reserved + + /* now data of data_size size */ + + /* first event name as a string */ + avio_w8(pb, AMF_DATA_TYPE_STRING); + put_amf_string(pb, "onMetaData"); // 12 bytes + + /* mixed array (hash) with size and string/type/data tuples */ + avio_w8(pb, AMF_DATA_TYPE_MIXEDARRAY); + metadata_count_pos = avio_tell(pb); + metadata_count = 5 * !!video_enc + + 5 * !!audio_enc + + 1 * !!data_enc + + 2; // +2 for duration and file size + + avio_wb32(pb, metadata_count); + + put_amf_string(pb, "duration"); + flv->duration_offset= avio_tell(pb); + + // fill in the guessed duration, it'll be corrected later if incorrect + put_amf_double(pb, s->duration / AV_TIME_BASE); + + if (video_enc) { + put_amf_string(pb, "width"); + put_amf_double(pb, video_enc->width); + + put_amf_string(pb, "height"); + put_amf_double(pb, video_enc->height); + + put_amf_string(pb, "videodatarate"); + put_amf_double(pb, video_enc->bit_rate / 1024.0); + + put_amf_string(pb, "framerate"); + put_amf_double(pb, framerate); + + put_amf_string(pb, "videocodecid"); + put_amf_double(pb, video_enc->codec_tag); + } + + if (audio_enc) { + put_amf_string(pb, "audiodatarate"); + put_amf_double(pb, audio_enc->bit_rate / 1024.0); + + put_amf_string(pb, "audiosamplerate"); + put_amf_double(pb, audio_enc->sample_rate); + + put_amf_string(pb, "audiosamplesize"); + put_amf_double(pb, audio_enc->codec_id == AV_CODEC_ID_PCM_U8 ? 8 : 16); + + put_amf_string(pb, "stereo"); + put_amf_bool(pb, audio_enc->channels == 2); + + put_amf_string(pb, "audiocodecid"); + put_amf_double(pb, audio_enc->codec_tag); + } + + if (data_enc) { + put_amf_string(pb, "datastream"); + put_amf_double(pb, 0.0); + } + + while ((tag = av_dict_get(s->metadata, "", tag, AV_DICT_IGNORE_SUFFIX))) { + if( !strcmp(tag->key, "width") + ||!strcmp(tag->key, "height") + ||!strcmp(tag->key, "videodatarate") + ||!strcmp(tag->key, "framerate") + ||!strcmp(tag->key, "videocodecid") + ||!strcmp(tag->key, "audiodatarate") + ||!strcmp(tag->key, "audiosamplerate") + ||!strcmp(tag->key, "audiosamplesize") + ||!strcmp(tag->key, "stereo") + ||!strcmp(tag->key, "audiocodecid") + ||!strcmp(tag->key, "duration") + ||!strcmp(tag->key, "onMetaData") + ){ + av_log(s, AV_LOG_DEBUG, "Ignoring metadata for %s\n", tag->key); + continue; + } + put_amf_string(pb, tag->key); + avio_w8(pb, AMF_DATA_TYPE_STRING); + put_amf_string(pb, tag->value); + metadata_count++; + } + + put_amf_string(pb, "filesize"); + flv->filesize_offset = avio_tell(pb); + put_amf_double(pb, 0); // delayed write + + put_amf_string(pb, ""); + avio_w8(pb, AMF_END_OF_OBJECT); + + /* write total size of tag */ + data_size = avio_tell(pb) - metadata_size_pos - 10; + + avio_seek(pb, metadata_count_pos, SEEK_SET); + avio_wb32(pb, metadata_count); + + avio_seek(pb, metadata_size_pos, SEEK_SET); + avio_wb24(pb, data_size); + avio_skip(pb, data_size + 10 - 3); + avio_wb32(pb, data_size + 11); + + for (i = 0; i < s->nb_streams; i++) { + AVCodecContext *enc = s->streams[i]->codec; + if (enc->codec_id == AV_CODEC_ID_AAC || enc->codec_id == AV_CODEC_ID_H264 || enc->codec_id == AV_CODEC_ID_MPEG4) { + int64_t pos; + avio_w8(pb, enc->codec_type == AVMEDIA_TYPE_VIDEO ? + FLV_TAG_TYPE_VIDEO : FLV_TAG_TYPE_AUDIO); + avio_wb24(pb, 0); // size patched later + avio_wb24(pb, 0); // ts + avio_w8(pb, 0); // ts ext + avio_wb24(pb, 0); // streamid + pos = avio_tell(pb); + if (enc->codec_id == AV_CODEC_ID_AAC) { + avio_w8(pb, get_audio_flags(s, enc)); + avio_w8(pb, 0); // AAC sequence header + avio_write(pb, enc->extradata, enc->extradata_size); + } else { + avio_w8(pb, enc->codec_tag | FLV_FRAME_KEY); // flags + avio_w8(pb, 0); // AVC sequence header + avio_wb24(pb, 0); // composition time + ff_isom_write_avcc(pb, enc->extradata, enc->extradata_size); + } + data_size = avio_tell(pb) - pos; + avio_seek(pb, -data_size - 10, SEEK_CUR); + avio_wb24(pb, data_size); + avio_skip(pb, data_size + 10 - 3); + avio_wb32(pb, data_size + 11); // previous tag size + } + } + + return 0; +} + +static int flv_write_trailer(AVFormatContext *s) +{ + int64_t file_size; + + AVIOContext *pb = s->pb; + FLVContext *flv = s->priv_data; + int i; + + /* Add EOS tag */ + for (i = 0; i < s->nb_streams; i++) { + AVCodecContext *enc = s->streams[i]->codec; + FLVStreamContext *sc = s->streams[i]->priv_data; + if (enc->codec_type == AVMEDIA_TYPE_VIDEO && + (enc->codec_id == AV_CODEC_ID_H264 || enc->codec_id == AV_CODEC_ID_MPEG4)) + put_avc_eos_tag(pb, sc->last_ts); + } + + file_size = avio_tell(pb); + + /* update information */ + if (avio_seek(pb, flv->duration_offset, SEEK_SET) < 0) + av_log(s, AV_LOG_WARNING, "Failed to update header with correct duration.\n"); + else + put_amf_double(pb, flv->duration / (double)1000); + if (avio_seek(pb, flv->filesize_offset, SEEK_SET) < 0) + av_log(s, AV_LOG_WARNING, "Failed to update header with correct filesize.\n"); + else + put_amf_double(pb, file_size); + + avio_seek(pb, file_size, SEEK_SET); + return 0; +} + +static int flv_write_packet(AVFormatContext *s, AVPacket *pkt) +{ + AVIOContext *pb = s->pb; + AVCodecContext *enc = s->streams[pkt->stream_index]->codec; + FLVContext *flv = s->priv_data; + FLVStreamContext *sc = s->streams[pkt->stream_index]->priv_data; + unsigned ts; + int size = pkt->size; + uint8_t *data = NULL; + int flags = -1, flags_size, ret; + + if (enc->codec_id == AV_CODEC_ID_VP6 || enc->codec_id == AV_CODEC_ID_VP6F || + enc->codec_id == AV_CODEC_ID_VP6A || enc->codec_id == AV_CODEC_ID_AAC) + flags_size = 2; + else if (enc->codec_id == AV_CODEC_ID_H264 || enc->codec_id == AV_CODEC_ID_MPEG4) + flags_size = 5; + else + flags_size = 1; + + switch (enc->codec_type) { + case AVMEDIA_TYPE_VIDEO: + avio_w8(pb, FLV_TAG_TYPE_VIDEO); + + flags = enc->codec_tag; + if (flags == 0) { + av_log(s, AV_LOG_ERROR, + "Video codec '%s' is not compatible with FLV\n", + avcodec_get_name(enc->codec_id)); + return AVERROR(EINVAL); + } + + flags |= pkt->flags & AV_PKT_FLAG_KEY ? FLV_FRAME_KEY : FLV_FRAME_INTER; + break; + case AVMEDIA_TYPE_AUDIO: + flags = get_audio_flags(s, enc); + + av_assert0(size); + + avio_w8(pb, FLV_TAG_TYPE_AUDIO); + break; + case AVMEDIA_TYPE_DATA: + avio_w8(pb, FLV_TAG_TYPE_META); + break; + default: + return AVERROR(EINVAL); + } + + if (enc->codec_id == AV_CODEC_ID_H264 || enc->codec_id == AV_CODEC_ID_MPEG4) { + /* check if extradata looks like mp4 formated */ + if (enc->extradata_size > 0 && *(uint8_t*)enc->extradata != 1) + if ((ret = ff_avc_parse_nal_units_buf(pkt->data, &data, &size)) < 0) + return ret; + } else if (enc->codec_id == AV_CODEC_ID_AAC && pkt->size > 2 && + (AV_RB16(pkt->data) & 0xfff0) == 0xfff0) { + av_log(s, AV_LOG_ERROR, "Malformed AAC bitstream detected: " + "use audio bitstream filter 'aac_adtstoasc' to fix it " + "('-bsf:a aac_adtstoasc' option with ffmpeg)\n"); + return AVERROR_INVALIDDATA; + } + + if (flv->delay == AV_NOPTS_VALUE) + flv->delay = -pkt->dts; + + if (pkt->dts < -flv->delay) { + av_log(s, AV_LOG_WARNING, + "Packets are not in the proper order with respect to DTS\n"); + return AVERROR(EINVAL); + } + + ts = pkt->dts + flv->delay; // add delay to force positive dts + + /* check Speex packet duration */ + if (enc->codec_id == AV_CODEC_ID_SPEEX && ts - sc->last_ts > 160) + av_log(s, AV_LOG_WARNING, "Warning: Speex stream has more than " + "8 frames per packet. Adobe Flash " + "Player cannot handle this!\n"); + + if (sc->last_ts < ts) + sc->last_ts = ts; + + avio_wb24(pb, size + flags_size); + avio_wb24(pb, ts); + avio_w8(pb, (ts >> 24) & 0x7F); // timestamps are 32 bits _signed_ + avio_wb24(pb, flv->reserved); + + if (enc->codec_type == AVMEDIA_TYPE_DATA) { + int data_size; + int metadata_size_pos = avio_tell(pb); + avio_w8(pb, AMF_DATA_TYPE_STRING); + put_amf_string(pb, "onTextData"); + avio_w8(pb, AMF_DATA_TYPE_MIXEDARRAY); + avio_wb32(pb, 2); + put_amf_string(pb, "type"); + avio_w8(pb, AMF_DATA_TYPE_STRING); + put_amf_string(pb, "Text"); + put_amf_string(pb, "text"); + avio_w8(pb, AMF_DATA_TYPE_STRING); + put_amf_string(pb, pkt->data); + put_amf_string(pb, ""); + avio_w8(pb, AMF_END_OF_OBJECT); + /* write total size of tag */ + data_size = avio_tell(pb) - metadata_size_pos; + avio_seek(pb, metadata_size_pos - 10, SEEK_SET); + avio_wb24(pb, data_size); + avio_seek(pb, data_size + 10 - 3, SEEK_CUR); + avio_wb32(pb, data_size + 11); + } else { + av_assert1(flags>=0); + avio_w8(pb,flags); + if (enc->codec_id == AV_CODEC_ID_VP6) + avio_w8(pb,0); + if (enc->codec_id == AV_CODEC_ID_VP6F || enc->codec_id == AV_CODEC_ID_VP6A) + avio_w8(pb, enc->extradata_size ? enc->extradata[0] : 0); + else if (enc->codec_id == AV_CODEC_ID_AAC) + avio_w8(pb,1); // AAC raw + else if (enc->codec_id == AV_CODEC_ID_H264 || enc->codec_id == AV_CODEC_ID_MPEG4) { + avio_w8(pb,1); // AVC NALU + avio_wb24(pb,pkt->pts - pkt->dts); + } + + avio_write(pb, data ? data : pkt->data, size); + + avio_wb32(pb, size + flags_size + 11); // previous tag size + flv->duration = FFMAX(flv->duration, + pkt->pts + flv->delay + pkt->duration); + } + + avio_flush(pb); + av_free(data); + + return pb->error; +} + +AVOutputFormat ff_flv_muxer = { + .name = "flv", + .long_name = NULL_IF_CONFIG_SMALL("FLV (Flash Video)"), + .mime_type = "video/x-flv", + .extensions = "flv", + .priv_data_size = sizeof(FLVContext), + .audio_codec = CONFIG_LIBMP3LAME ? AV_CODEC_ID_MP3 : AV_CODEC_ID_ADPCM_SWF, + .video_codec = AV_CODEC_ID_FLV1, + .write_header = flv_write_header, + .write_packet = flv_write_packet, + .write_trailer = flv_write_trailer, + .codec_tag = (const AVCodecTag* const []) { + flv_video_codec_ids, flv_audio_codec_ids, 0 + }, + .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS | + AVFMT_TS_NONSTRICT, +}; |