basic type mechanism working

1 files changed, 168 insertions, 56 deletions

diff --git a/ffmpeg/doc/ffmpeg.texi b/ffmpeg/doc/ffmpeg.texi
index ca5d652..0a930ce 100644
--- a/ffmpeg/doc/ffmpeg.texi
+++ b/ffmpeg/doc/ffmpeg.texi
@@ -16,26 +16,26 @@ ffmpeg [@var{global_options}] @{[@var{input_file_options}] -i @file{input_file}@
 @chapter Description
 @c man begin DESCRIPTION
 
-ffmpeg is a very fast video and audio converter that can also grab from
+@command{ffmpeg} is a very fast video and audio converter that can also grab from
 a live audio/video source. It can also convert between arbitrary sample
 rates and resize video on the fly with a high quality polyphase filter.
 
-ffmpeg reads from an arbitrary number of input "files" (which can be regular
+@command{ffmpeg} reads from an arbitrary number of input "files" (which can be regular
 files, pipes, network streams, grabbing devices, etc.), specified by the
 @code{-i} option, and writes to an arbitrary number of output "files", which are
 specified by a plain output filename. Anything found on the command line which
 cannot be interpreted as an option is considered to be an output filename.
 
-Each input or output file can in principle contain any number of streams of
-different types (video/audio/subtitle/attachment/data). Allowed number and/or
-types of streams can be limited by the container format. Selecting, which
-streams from which inputs go into output, is done either automatically or with
-the @code{-map} option (see the Stream selection chapter).
+Each input or output file can, in principle, contain any number of streams of
+different types (video/audio/subtitle/attachment/data). The allowed number and/or
+types of streams may be limited by the container format. Selecting which
+streams from which inputs will go into which output is either done automatically
+or with the @code{-map} option (see the Stream selection chapter).
 
 To refer to input files in options, you must use their indices (0-based). E.g.
-the first input file is @code{0}, the second is @code{1} etc. Similarly, streams
+the first input file is @code{0}, the second is @code{1}, etc. Similarly, streams
 within a file are referred to by their indices. E.g. @code{2:3} refers to the
-fourth stream in the third input file. See also the Stream specifiers chapter.
+fourth stream in the third input file. Also see the Stream specifiers chapter.
 
 As a general rule, options are applied to the next specified
 file. Therefore, order is important, and you can have the same
@@ -50,7 +50,7 @@ options apply ONLY to the next input or output file and are reset between files.
 
 @itemize
 @item
-To set the video bitrate of the output file to 64kbit/s:
+To set the video bitrate of the output file to 64 kbit/s:
 @example
 ffmpeg -i input.avi -b:v 64k -bufsize 64k output.avi
 @end example
@@ -96,14 +96,14 @@ tracking lowest timestamp on any active input stream.
 Encoded packets are then passed to the decoder (unless streamcopy is selected
 for the stream, see further for a description). The decoder produces
 uncompressed frames (raw video/PCM audio/...) which can be processed further by
-filtering (see next section). After filtering the frames are passed to the
-encoder, which encodes them and outputs encoded packets again. Finally those are
+filtering (see next section). After filtering, the frames are passed to the
+encoder, which encodes them and outputs encoded packets. Finally those are
 passed to the muxer, which writes the encoded packets to the output file.
 
 @section Filtering
 Before encoding, @command{ffmpeg} can process raw audio and video frames using
 filters from the libavfilter library. Several chained filters form a filter
-graph.  @command{ffmpeg} distinguishes between two types of filtergraphs -
+graph. @command{ffmpeg} distinguishes between two types of filtergraphs:
 simple and complex.
 
 @subsection Simple filtergraphs
@@ -139,7 +139,7 @@ only sets timestamps and otherwise passes the frames unchanged.
 
 @subsection Complex filtergraphs
 Complex filtergraphs are those which cannot be described as simply a linear
-processing chain applied to one stream. This is the case e.g. when the graph has
+processing chain applied to one stream. This is the case, for example, when the graph has
 more than one input and/or output, or when output stream type is different from
 input. They can be represented with the following diagram:
 
@@ -164,7 +164,7 @@ input. They can be represented with the following diagram:
 @end example
 
 Complex filtergraphs are configured with the @option{-filter_complex} option.
-Note that this option is global, since a complex filtergraph by its nature
+Note that this option is global, since a complex filtergraph, by its nature,
 cannot be unambiguously associated with a single stream or file.
 
 The @option{-lavfi} option is equivalent to @option{-filter_complex}.
@@ -178,7 +178,7 @@ Stream copy is a mode selected by supplying the @code{copy} parameter to the
 @option{-codec} option. It makes @command{ffmpeg} omit the decoding and encoding
 step for the specified stream, so it does only demuxing and muxing. It is useful
 for changing the container format or modifying container-level metadata. The
-diagram above will in this case simplify to this:
+diagram above will, in this case, simplify to this:
 
 @example
  _______              ______________            ________
@@ -190,7 +190,7 @@ diagram above will in this case simplify to this:
 @end example
 
 Since there is no decoding or encoding, it is very fast and there is no quality
-loss. However it might not work in some cases because of many factors. Applying
+loss. However, it might not work in some cases because of many factors. Applying
 filters is obviously also impossible, since filters work on uncompressed data.
 
 @c man end DETAILED DESCRIPTION
@@ -198,14 +198,14 @@ filters is obviously also impossible, since filters work on uncompressed data.
 @chapter Stream selection
 @c man begin STREAM SELECTION
 
-By default ffmpeg includes only one stream of each type (video, audio, subtitle)
+By default, @command{ffmpeg} includes only one stream of each type (video, audio, subtitle)
 present in the input files and adds them to each output file.  It picks the
-"best" of each based upon the following criteria; for video it is the stream
-with the highest resolution, for audio the stream with the most channels, for
-subtitle it's the first subtitle stream. In the case where several streams of
-the same type rate equally, the lowest numbered stream is chosen.
+"best" of each based upon the following criteria: for video, it is the stream
+with the highest resolution, for audio, it is the stream with the most channels, for
+subtitles, it is the first subtitle stream. In the case where several streams of
+the same type rate equally, the stream with the lowest index is chosen.
 
-You can disable some of those defaults by using @code{-vn/-an/-sn} options. For
+You can disable some of those defaults by using the @code{-vn/-an/-sn} options. For
 full manual control, use the @code{-map} option, which disables the defaults just
 described.
 
@@ -214,7 +214,7 @@ described.
 @chapter Options
 @c man begin OPTIONS
 
-@include avtools-common-opts.texi
+@include fftools-common-opts.texi
 
 @section Main options
 
@@ -222,7 +222,7 @@ described.
 
 @item -f @var{fmt} (@emph{input/output})
 Force input or output file format. The format is normally auto detected for input
-files and guessed from file extension for output files, so this option is not
+files and guessed from the file extension for output files, so this option is not
 needed in most cases.
 
 @item -i @var{filename} (@emph{input})
@@ -232,7 +232,8 @@ input file name
 Overwrite output files without asking.
 
 @item -n (@emph{global})
-Do not overwrite output files but exit if file exists.
+Do not overwrite output files, and exit immediately if a specified
+output file already exists.
 
 @item -c[:@var{stream_specifier}] @var{codec} (@emph{input/output,per-stream})
 @itemx -codec[:@var{stream_specifier}] @var{codec} (@emph{input/output,per-stream})
@@ -271,9 +272,15 @@ Set the file size limit, expressed in bytes.
 
 @item -ss @var{position} (@emph{input/output})
 When used as an input option (before @code{-i}), seeks in this input file to
-@var{position}. When used as an output option (before an output filename),
-decodes but discards input until the timestamps reach @var{position}. This is
-slower, but more accurate.
+@var{position}. Note the in most formats it is not possible to seek exactly, so
+@command{ffmpeg} will seek to the closest seek point before @var{position}.
+When transcoding and @option{-accurate_seek} is enabled (the default), this
+extra segment between the seek point and @var{position} will be decoded and
+discarded. When doing stream copy or when @option{-noaccurate_seek} is used, it
+will be preserved.
+
+When used as an output option (before an output filename), decodes but discards
+input until the timestamps reach @var{position}.
 
 @var{position} may be either in seconds or in @code{hh:mm:ss[.xxx]} form.
 
@@ -341,23 +348,33 @@ Stop writing to the stream after @var{framecount} frames.
 
 @item -q[:@var{stream_specifier}] @var{q} (@emph{output,per-stream})
 @itemx -qscale[:@var{stream_specifier}] @var{q} (@emph{output,per-stream})
-Use fixed quality scale (VBR). The meaning of @var{q} is
+Use fixed quality scale (VBR). The meaning of @var{q}/@var{qscale} is
 codec-dependent.
+If @var{qscale} is used without a @var{stream_specifier} then it applies only
+to the video stream, this is to maintain compatibility with previous behavior
+and as specifying the same codec specific value to 2 different codecs that is
+audio and video generally is not what is intended when no stream_specifier is
+used.
 
 @anchor{filter_option}
-@item -filter[:@var{stream_specifier}] @var{filter_graph} (@emph{output,per-stream})
-Create the filter graph specified by @var{filter_graph} and use it to
+@item -filter[:@var{stream_specifier}] @var{filtergraph} (@emph{output,per-stream})
+Create the filtergraph specified by @var{filtergraph} and use it to
 filter the stream.
 
-@var{filter_graph} is a description of the filter graph to apply to
+@var{filtergraph} is a description of the filtergraph to apply to
 the stream, and must have a single input and a single output of the
-same type of the stream. In the filter graph, the input is associated
+same type of the stream. In the filtergraph, the input is associated
 to the label @code{in}, and the output to the label @code{out}. See
 the ffmpeg-filters manual for more information about the filtergraph
 syntax.
 
 See the @ref{filter_complex_option,,-filter_complex option} if you
-want to create filter graphs with multiple inputs and/or outputs.
+want to create filtergraphs with multiple inputs and/or outputs.
+
+@item -filter_script[:@var{stream_specifier}] @var{filename} (@emph{output,per-stream})
+This option is similar to @option{-filter}, the only difference is that its
+argument is the name of the file from which a filtergraph description is to be
+read.
 
 @item -pre[:@var{stream_specifier}] @var{preset_name} (@emph{output,per-stream})
 Specify the preset for matching stream(s).
@@ -462,6 +479,10 @@ form @var{num}:@var{den}, where @var{num} and @var{den} are the
 numerator and denominator of the aspect ratio. For example "4:3",
 "16:9", "1.3333", and "1.7777" are valid argument values.
 
+If used together with @option{-vcodec copy}, it will affect the aspect ratio
+stored at container level, but not the aspect ratio stored in encoded
+frames, if it exists.
+
 @item -vn (@emph{output})
 Disable video recording.
 
@@ -490,8 +511,8 @@ stream
 @item -vlang @var{code}
 Set the ISO 639 language code (3 letters) of the current video stream.
 
-@item -vf @var{filter_graph} (@emph{output})
-Create the filter graph specified by @var{filter_graph} and use it to
+@item -vf @var{filtergraph} (@emph{output})
+Create the filtergraph specified by @var{filtergraph} and use it to
 filter the stream.
 
 This is an alias for @code{-filter:v}, see the @ref{filter_option,,-filter option}.
@@ -507,7 +528,7 @@ If the selected pixel format can not be selected, ffmpeg will print a
 warning and select the best pixel format supported by the encoder.
 If @var{pix_fmt} is prefixed by a @code{+}, ffmpeg will exit with an error
 if the requested pixel format can not be selected, and automatic conversions
-inside filter graphs are disabled.
+inside filtergraphs are disabled.
 If @var{pix_fmt} is a single @code{+}, ffmpeg selects the same pixel format
 as the input (or graph output) and automatic conversions are disabled.
 
@@ -522,10 +543,6 @@ list separated with slashes. Two first values are the beginning and
 end frame numbers, last one is quantizer to use if positive, or quality
 factor if negative.
 
-@item -deinterlace
-Deinterlace pictures.
-This option is deprecated since the deinterlacing is very low quality.
-Use the yadif filter with @code{-filter:v yadif}.
 @item -ilme
 Force interlacing support in encoder (MPEG-2 and MPEG-4 only).
 Use this option if your input file is interlaced and you want
@@ -604,6 +621,42 @@ would be more efficient.
 @item -copyinkf[:@var{stream_specifier}] (@emph{output,per-stream})
 When doing stream copy, copy also non-key frames found at the
 beginning.
+
+@item -hwaccel[:@var{stream_specifier}] @var{hwaccel} (@emph{input,per-stream})
+Use hardware acceleration to decode the matching stream(s). The allowed values
+of @var{hwaccel} are:
+@table @option
+@item none
+Do not use any hardware acceleration (the default).
+
+@item auto
+Automatically select the hardware acceleration method.
+
+@item vdpau
+Use VDPAU (Video Decode and Presentation API for Unix) hardware acceleration.
+@end table
+
+This option has no effect if the selected hwaccel is not available or not
+supported by the chosen decoder.
+
+Note that most acceleration methods are intended for playback and will not be
+faster than software decoding on modern CPUs. Additionally, @command{ffmpeg}
+will usually need to copy the decoded frames from the GPU memory into the system
+memory, resulting in further performance loss. This option is thus mainly
+useful for testing.
+
+@item -hwaccel_device[:@var{stream_specifier}] @var{hwaccel_device} (@emph{input,per-stream})
+Select a device to use for hardware acceleration.
+
+This option only makes sense when the @option{-hwaccel} option is also
+specified. Its exact meaning depends on the specific hardware acceleration
+method chosen.
+
+@table @option
+@item vdpau
+For VDPAU, this option specifies the X11 display/screen to use. If this option
+is not specified, the value of the @var{DISPLAY} environment variable is used
+@end table
 @end table
 
 @section Audio Options
@@ -631,8 +684,8 @@ Set the audio codec. This is an alias for @code{-codec:a}.
 Set the audio sample format. Use @code{-sample_fmts} to get a list
 of supported sample formats.
 
-@item -af @var{filter_graph} (@emph{output})
-Create the filter graph specified by @var{filter_graph} and use it to
+@item -af @var{filtergraph} (@emph{output})
+Create the filtergraph specified by @var{filtergraph} and use it to
 filter the stream.
 
 This is an alias for @code{-filter:a}, see the @ref{filter_option,,-filter option}.
@@ -865,13 +918,12 @@ Dump each input packet to stderr.
 When dumping packets, also dump the payload.
 @item -re (@emph{input})
 Read input at native frame rate. Mainly used to simulate a grab device.
+or live input stream (e.g. when reading from a file). Should not be used
+with actual grab devices or live input streams (where it can cause packet
+loss).
 By default @command{ffmpeg} attempts to read the input(s) as fast as possible.
 This option will slow down the reading of the input(s) to the native frame rate
-of the input(s). It is useful for real-time output (e.g. live streaming). If
-your input(s) is coming from some other live streaming source (through HTTP or
-UDP for example) the server might already be in real-time, thus the option will
-likely not be required. On the other hand, this is meaningful if your input(s)
-is a file you are trying to push in real-time.
+of the input(s). It is useful for real-time output (e.g. live streaming).
 @item -loop_input
 Loop over the input stream. Currently it works only for image
 streams. This option is used for automatic FFserver testing.
@@ -890,7 +942,7 @@ Newly added values will have to be specified as strings always.
 Each frame is passed with its timestamp from the demuxer to the muxer.
 @item 1, cfr
 Frames will be duplicated and dropped to achieve exactly the requested
-constant framerate.
+constant frame rate.
 @item 2, vfr
 Frames are passed through with their timestamp or dropped so as to
 prevent 2 frames from having the same timestamp.
@@ -999,10 +1051,10 @@ ffmpeg -i input.mpg -timecode 01:02:03.04 -r 30000/1001 -s ntsc output.mpg
 
 @anchor{filter_complex_option}
 @item -filter_complex @var{filtergraph} (@emph{global})
-Define a complex filter graph, i.e. one with arbitrary number of inputs and/or
+Define a complex filtergraph, i.e. one with arbitrary number of inputs and/or
 outputs. For simple graphs -- those with one input and one output of the same
 type -- see the @option{-filter} options. @var{filtergraph} is a description of
-the filter graph, as described in the ``Filtergraph syntax'' section of the
+the filtergraph, as described in the ``Filtergraph syntax'' section of the
 ffmpeg-filters manual.
 
 Input link labels must refer to input streams using the
@@ -1046,9 +1098,30 @@ ffmpeg -filter_complex 'color=c=red' -t 5 out.mkv
 @end example
 
 @item -lavfi @var{filtergraph} (@emph{global})
-Define a complex filter graph, i.e. one with arbitrary number of inputs and/or
+Define a complex filtergraph, i.e. one with arbitrary number of inputs and/or
 outputs. Equivalent to @option{-filter_complex}.
 
+@item -filter_complex_script @var{filename} (@emph{global})
+This option is similar to @option{-filter_complex}, the only difference is that
+its argument is the name of the file from which a complex filtergraph
+description is to be read.
+
+@item -accurate_seek (@emph{input})
+This option enables or disables accurate seeking in input files with the
+@option{-ss} option. It is enabled by default, so seeking is accurate when
+transcoding. Use @option{-noaccurate_seek} to disable it, which may be useful
+e.g. when copying some streams and transcoding the others.
+
+@item -override_ffserver (@emph{global})
+Overrides the input specifications from @command{ffserver}. Using this
+option you can map any input stream to @command{ffserver} and control
+many aspects of the encoding from @command{ffmpeg}. Without this
+option @command{ffmpeg} will transmit to @command{ffserver} what is
+requested by @command{ffserver}.
+
+The option is intended for cases where features are needed that cannot be
+specified to @command{ffserver} but can be to @command{ffmpeg}.
+
 @end table
 
 As a special exception, you can use a bitmap subtitle stream as input: it
@@ -1106,7 +1179,7 @@ then it will search for the file @file{libvpx-1080p.ffpreset}.
 
 @itemize
 @item
-For streaming at very low bitrate application, use a low frame rate
+For streaming at very low bitrates, use a low frame rate
 and a small GOP size. This is especially true for RealVideo where
 the Linux player does not seem to be very fast, so it can miss
 frames. An example is:
@@ -1185,14 +1258,14 @@ standard mixer.
 Grab the X11 display with ffmpeg via
 
 @example
-ffmpeg -f x11grab -s cif -r 25 -i :0.0 /tmp/out.mpg
+ffmpeg -f x11grab -video_size cif -framerate 25 -i :0.0 /tmp/out.mpg
 @end example
 
 0.0 is display.screen number of your X11 server, same as
 the DISPLAY environment variable.
 
 @example
-ffmpeg -f x11grab -s cif -r 25 -i :0.0+10,20 /tmp/out.mpg
+ffmpeg -f x11grab -video_size cif -framerate 25 -i :0.0+10,20 /tmp/out.mpg
 @end example
 
 0.0 is display.screen number of your X11 server, same as the DISPLAY environment
@@ -1351,9 +1424,42 @@ ffmpeg -i src.ext -lmax 21*QP2LAMBDA dst.ext
 @end itemize
 @c man end EXAMPLES
 
+@include config.texi
+@ifset config-all
+@ifset config-avutil
+@include utils.texi
+@end ifset
+@ifset config-avcodec
+@include codecs.texi
+@include bitstream_filters.texi
+@end ifset
+@ifset config-avformat
+@include formats.texi
+@include protocols.texi
+@end ifset
+@ifset config-avdevice
+@include devices.texi
+@end ifset
+@ifset config-swresample
+@include resampler.texi
+@end ifset
+@ifset config-swscale
+@include scaler.texi
+@end ifset
+@ifset config-avfilter
+@include filters.texi
+@end ifset
+@end ifset
+
 @chapter See Also
 
 @ifhtml
+@ifset config-all
+@url{ffmpeg.html,ffmpeg}
+@end ifset
+@ifset config-not-all
+@url{ffmpeg-all.html,ffmpeg-all},
+@end ifset
 @url{ffplay.html,ffplay}, @url{ffprobe.html,ffprobe}, @url{ffserver.html,ffserver},
 @url{ffmpeg-utils.html,ffmpeg-utils},
 @url{ffmpeg-scaler.html,ffmpeg-scaler},
@@ -1367,6 +1473,12 @@ ffmpeg -i src.ext -lmax 21*QP2LAMBDA dst.ext
 @end ifhtml
 
 @ifnothtml
+@ifset config-all
+ffmpeg(1),
+@end ifset
+@ifset config-not-all
+ffmpeg-all(1),
+@end ifset
 ffplay(1), ffprobe(1), ffserver(1),
 ffmpeg-utils(1), ffmpeg-scaler(1), ffmpeg-resampler(1),
 ffmpeg-codecs(1), ffmpeg-bitstream-filters(1), ffmpeg-formats(1),