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-\input texinfo @c -*- texinfo -*-
-
-@settitle ffmpeg Documentation
-@titlepage
-@center @titlefont{ffmpeg Documentation}
-@end titlepage
-
-@top
-
-@contents
-
-@chapter Synopsis
-
-The generic syntax is:
-
-@example
-@c man begin SYNOPSIS
-ffmpeg [[infile options][@option{-i} @var{infile}]]... @{[outfile options] @var{outfile}@}...
-@c man end
-@end example
-
-@chapter Description
-@c man begin DESCRIPTION
-
-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.
-
-The command line interface is designed to be intuitive, in the sense
-that ffmpeg tries to figure out all parameters that can possibly be
-derived automatically. You usually only have to specify the target
-bitrate you want.
-
-As a general rule, options are applied to the next specified
-file. Therefore, order is important, and you can have the same
-option on the command line multiple times. Each occurrence is
-then applied to the next input or output file.
-
-@itemize
-@item
-To set the video bitrate of the output file to 64kbit/s:
-@example
-ffmpeg -i input.avi -b 64k output.avi
-@end example
-
-@item
-To force the frame rate of the output file to 24 fps:
-@example
-ffmpeg -i input.avi -r 24 output.avi
-@end example
-
-@item
-To force the frame rate of the input file (valid for raw formats only)
-to 1 fps and the frame rate of the output file to 24 fps:
-@example
-ffmpeg -r 1 -i input.m2v -r 24 output.avi
-@end example
-@end itemize
-
-The format option may be needed for raw input files.
-
-By default ffmpeg tries to convert as losslessly as possible: It
-uses the same audio and video parameters for the outputs as the one
-specified for the inputs.
-
-@c man end DESCRIPTION
-
-@chapter Options
-@c man begin OPTIONS
-
-@include avtools-common-opts.texi
-
-@section Main options
-
-@table @option
-
-@item -f @var{fmt}
-Force format.
-
-@item -i @var{filename}
-input file name
-
-@item -y
-Overwrite output files.
-
-@item -t @var{duration}
-Restrict the transcoded/captured video sequence
-to the duration specified in seconds.
-@code{hh:mm:ss[.xxx]} syntax is also supported.
-
-@item -fs @var{limit_size}
-Set the file size limit.
-
-@item -ss @var{position}
-Seek to given time position in seconds.
-@code{hh:mm:ss[.xxx]} syntax is also supported.
-
-@item -itsoffset @var{offset}
-Set the input time offset in seconds.
-@code{[-]hh:mm:ss[.xxx]} syntax is also supported.
-This option affects all the input files that follow it.
-The offset is added to the timestamps of the input files.
-Specifying a positive offset means that the corresponding
-streams are delayed by 'offset' seconds.
-
-@item -timestamp @var{time}
-Set the recording timestamp in the container.
-The syntax for @var{time} is:
-@example
-now|([(YYYY-MM-DD|YYYYMMDD)[T|t| ]]((HH[:MM[:SS[.m...]]])|(HH[MM[SS[.m...]]]))[Z|z])
-@end example
-If the value is "now" it takes the current time.
-Time is local time unless 'Z' or 'z' is appended, in which case it is
-interpreted as UTC.
-If the year-month-day part is not specified it takes the current
-year-month-day.
-
-@item -metadata @var{key}=@var{value}
-Set a metadata key/value pair.
-
-For example, for setting the title in the output file:
-@example
-ffmpeg -i in.avi -metadata title="my title" out.flv
-@end example
-
-@item -v @var{number}
-Set the logging verbosity level.
-
-@item -target @var{type}
-Specify target file type ("vcd", "svcd", "dvd", "dv", "dv50", "pal-vcd",
-"ntsc-svcd", ... ). All the format options (bitrate, codecs,
-buffer sizes) are then set automatically. You can just type:
-
-@example
-ffmpeg -i myfile.avi -target vcd /tmp/vcd.mpg
-@end example
-
-Nevertheless you can specify additional options as long as you know
-they do not conflict with the standard, as in:
-
-@example
-ffmpeg -i myfile.avi -target vcd -bf 2 /tmp/vcd.mpg
-@end example
-
-@item -dframes @var{number}
-Set the number of data frames to record.
-
-@item -scodec @var{codec}
-Force subtitle codec ('copy' to copy stream).
-
-@item -newsubtitle
-Add a new subtitle stream to the current output stream.
-
-@item -slang @var{code}
-Set the ISO 639 language code (3 letters) of the current subtitle stream.
-
-@end table
-
-@section Video Options
-
-@table @option
-@item -vframes @var{number}
-Set the number of video frames to record.
-@item -r @var{fps}
-Set frame rate (Hz value, fraction or abbreviation), (default = 25).
-@item -s @var{size}
-Set frame size. The format is @samp{wxh} (avserver default = 160x128, ffmpeg default = same as source).
-The following abbreviations are recognized:
-@table @samp
-@item sqcif
-128x96
-@item qcif
-176x144
-@item cif
-352x288
-@item 4cif
-704x576
-@item 16cif
-1408x1152
-@item qqvga
-160x120
-@item qvga
-320x240
-@item vga
-640x480
-@item svga
-800x600
-@item xga
-1024x768
-@item uxga
-1600x1200
-@item qxga
-2048x1536
-@item sxga
-1280x1024
-@item qsxga
-2560x2048
-@item hsxga
-5120x4096
-@item wvga
-852x480
-@item wxga
-1366x768
-@item wsxga
-1600x1024
-@item wuxga
-1920x1200
-@item woxga
-2560x1600
-@item wqsxga
-3200x2048
-@item wquxga
-3840x2400
-@item whsxga
-6400x4096
-@item whuxga
-7680x4800
-@item cga
-320x200
-@item ega
-640x350
-@item hd480
-852x480
-@item hd720
-1280x720
-@item hd1080
-1920x1080
-@end table
-
-@item -aspect @var{aspect}
-Set the video display aspect ratio specified by @var{aspect}.
-
-@var{aspect} can be a floating point number string, or a string of the
-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.
-
-@item -croptop @var{size}
-@item -cropbottom @var{size}
-@item -cropleft @var{size}
-@item -cropright @var{size}
-All the crop options have been removed. Use -vf
-crop=width:height:x:y instead.
-
-@item -padtop @var{size}
-@item -padbottom @var{size}
-@item -padleft @var{size}
-@item -padright @var{size}
-@item -padcolor @var{hex_color}
-All the pad options have been removed. Use -vf
-pad=width:height:x:y:color instead.
-@item -vn
-Disable video recording.
-@item -bt @var{tolerance}
-Set video bitrate tolerance (in bits, default 4000k).
-Has a minimum value of: (target_bitrate/target_framerate).
-In 1-pass mode, bitrate tolerance specifies how far ratecontrol is
-willing to deviate from the target average bitrate value. This is
-not related to min/max bitrate. Lowering tolerance too much has
-an adverse effect on quality.
-@item -maxrate @var{bitrate}
-Set max video bitrate (in bit/s).
-Requires -bufsize to be set.
-@item -minrate @var{bitrate}
-Set min video bitrate (in bit/s).
-Most useful in setting up a CBR encode:
-@example
-ffmpeg -i myfile.avi -b 4000k -minrate 4000k -maxrate 4000k -bufsize 1835k out.m2v
-@end example
-It is of little use elsewise.
-@item -bufsize @var{size}
-Set video buffer verifier buffer size (in bits).
-@item -vcodec @var{codec}
-Force video codec to @var{codec}. Use the @code{copy} special value to
-tell that the raw codec data must be copied as is.
-@item -sameq
-Use same quantizer as source (implies VBR).
-
-@item -pass @var{n}
-Select the pass number (1 or 2). It is used to do two-pass
-video encoding. The statistics of the video are recorded in the first
-pass into a log file (see also the option -passlogfile),
-and in the second pass that log file is used to generate the video
-at the exact requested bitrate.
-On pass 1, you may just deactivate audio and set output to null,
-examples for Windows and Unix:
-@example
-ffmpeg -i foo.mov -vcodec libxvid -pass 1 -an -f rawvideo -y NUL
-ffmpeg -i foo.mov -vcodec libxvid -pass 1 -an -f rawvideo -y /dev/null
-@end example
-
-@item -passlogfile @var{prefix}
-Set two-pass log file name prefix to @var{prefix}, the default file name
-prefix is ``ffmpeg2pass''. The complete file name will be
-@file{PREFIX-N.log}, where N is a number specific to the output
-stream.
-
-@item -newvideo
-Add a new video stream to the current output stream.
-
-@item -vlang @var{code}
-Set the ISO 639 language code (3 letters) of the current video stream.
-
-@item -vf @var{filter_graph}
-@var{filter_graph} is a description of the filter graph to apply to
-the input video.
-Use the option "-filters" to show all the available filters (including
-also sources and sinks).
-
-@end table
-
-@section Advanced Video Options
-
-@table @option
-@item -pix_fmt @var{format}
-Set pixel format. Use 'list' as parameter to show all the supported
-pixel formats.
-@item -sws_flags @var{flags}
-Set SwScaler flags.
-@item -g @var{gop_size}
-Set the group of pictures size.
-@item -intra
-Use only intra frames.
-@item -vdt @var{n}
-Discard threshold.
-@item -qscale @var{q}
-Use fixed video quantizer scale (VBR).
-@item -qmin @var{q}
-minimum video quantizer scale (VBR)
-@item -qmax @var{q}
-maximum video quantizer scale (VBR)
-@item -qdiff @var{q}
-maximum difference between the quantizer scales (VBR)
-@item -qblur @var{blur}
-video quantizer scale blur (VBR) (range 0.0 - 1.0)
-@item -qcomp @var{compression}
-video quantizer scale compression (VBR) (default 0.5).
-Constant of ratecontrol equation. Recommended range for default rc_eq: 0.0-1.0
-
-@item -lmin @var{lambda}
-minimum video lagrange factor (VBR)
-@item -lmax @var{lambda}
-max video lagrange factor (VBR)
-@item -mblmin @var{lambda}
-minimum macroblock quantizer scale (VBR)
-@item -mblmax @var{lambda}
-maximum macroblock quantizer scale (VBR)
-
-These four options (lmin, lmax, mblmin, mblmax) use 'lambda' units,
-but you may use the QP2LAMBDA constant to easily convert from 'q' units:
-@example
-ffmpeg -i src.ext -lmax 21*QP2LAMBDA dst.ext
-@end example
-
-@item -rc_init_cplx @var{complexity}
-initial complexity for single pass encoding
-@item -b_qfactor @var{factor}
-qp factor between P- and B-frames
-@item -i_qfactor @var{factor}
-qp factor between P- and I-frames
-@item -b_qoffset @var{offset}
-qp offset between P- and B-frames
-@item -i_qoffset @var{offset}
-qp offset between P- and I-frames
-@item -rc_eq @var{equation}
-Set rate control equation (see section "Expression Evaluation")
-(default = @code{tex^qComp}).
-
-When computing the rate control equation expression, besides the
-standard functions defined in the section "Expression Evaluation", the
-following functions are available:
-@table @var
-@item bits2qp(bits)
-@item qp2bits(qp)
-@end table
-
-and the following constants are available:
-@table @var
-@item iTex
-@item pTex
-@item tex
-@item mv
-@item fCode
-@item iCount
-@item mcVar
-@item var
-@item isI
-@item isP
-@item isB
-@item avgQP
-@item qComp
-@item avgIITex
-@item avgPITex
-@item avgPPTex
-@item avgBPTex
-@item avgTex
-@end table
-
-@item -rc_override @var{override}
-rate control override for specific intervals
-@item -me_method @var{method}
-Set motion estimation method to @var{method}.
-Available methods are (from lowest to best quality):
-@table @samp
-@item zero
-Try just the (0, 0) vector.
-@item phods
-@item log
-@item x1
-@item hex
-@item umh
-@item epzs
-(default method)
-@item full
-exhaustive search (slow and marginally better than epzs)
-@end table
-
-@item -dct_algo @var{algo}
-Set DCT algorithm to @var{algo}. Available values are:
-@table @samp
-@item 0
-FF_DCT_AUTO (default)
-@item 1
-FF_DCT_FASTINT
-@item 2
-FF_DCT_INT
-@item 3
-FF_DCT_MMX
-@item 4
-FF_DCT_MLIB
-@item 5
-FF_DCT_ALTIVEC
-@end table
-
-@item -idct_algo @var{algo}
-Set IDCT algorithm to @var{algo}. Available values are:
-@table @samp
-@item 0
-FF_IDCT_AUTO (default)
-@item 1
-FF_IDCT_INT
-@item 2
-FF_IDCT_SIMPLE
-@item 3
-FF_IDCT_SIMPLEMMX
-@item 4
-FF_IDCT_LIBMPEG2MMX
-@item 5
-FF_IDCT_PS2
-@item 6
-FF_IDCT_MLIB
-@item 7
-FF_IDCT_ARM
-@item 8
-FF_IDCT_ALTIVEC
-@item 9
-FF_IDCT_SH4
-@item 10
-FF_IDCT_SIMPLEARM
-@end table
-
-@item -er @var{n}
-Set error resilience to @var{n}.
-@table @samp
-@item 1
-FF_ER_CAREFUL (default)
-@item 2
-FF_ER_COMPLIANT
-@item 3
-FF_ER_AGGRESSIVE
-@item 4
-FF_ER_EXPLODE
-@end table
-
-@item -ec @var{bit_mask}
-Set error concealment to @var{bit_mask}. @var{bit_mask} is a bit mask of
-the following values:
-@table @samp
-@item 1
-FF_EC_GUESS_MVS (default = enabled)
-@item 2
-FF_EC_DEBLOCK (default = enabled)
-@end table
-
-@item -bf @var{frames}
-Use 'frames' B-frames (supported for MPEG-1, MPEG-2 and MPEG-4).
-@item -mbd @var{mode}
-macroblock decision
-@table @samp
-@item 0
-FF_MB_DECISION_SIMPLE: Use mb_cmp (cannot change it yet in ffmpeg).
-@item 1
-FF_MB_DECISION_BITS: Choose the one which needs the fewest bits.
-@item 2
-FF_MB_DECISION_RD: rate distortion
-@end table
-
-@item -4mv
-Use four motion vector by macroblock (MPEG-4 only).
-@item -part
-Use data partitioning (MPEG-4 only).
-@item -bug @var{param}
-Work around encoder bugs that are not auto-detected.
-@item -strict @var{strictness}
-How strictly to follow the standards.
-@item -aic
-Enable Advanced intra coding (h263+).
-@item -umv
-Enable Unlimited Motion Vector (h263+)
-
-@item -deinterlace
-Deinterlace pictures.
-@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
-to keep the interlaced format for minimum losses.
-The alternative is to deinterlace the input stream with
-@option{-deinterlace}, but deinterlacing introduces losses.
-@item -psnr
-Calculate PSNR of compressed frames.
-@item -vstats
-Dump video coding statistics to @file{vstats_HHMMSS.log}.
-@item -vstats_file @var{file}
-Dump video coding statistics to @var{file}.
-@item -top @var{n}
-top=1/bottom=0/auto=-1 field first
-@item -dc @var{precision}
-Intra_dc_precision.
-@item -vtag @var{fourcc/tag}
-Force video tag/fourcc.
-@item -qphist
-Show QP histogram.
-@item -vbsf @var{bitstream_filter}
-Bitstream filters available are "dump_extra", "remove_extra", "noise", "h264_mp4toannexb", "imxdump", "mjpegadump", "mjpeg2jpeg".
-@example
-ffmpeg -i h264.mp4 -vcodec copy -vbsf h264_mp4toannexb -an out.h264
-@end example
-@item -force_key_frames @var{time}[,@var{time}...]
-Force key frames at the specified timestamps, more precisely at the first
-frames after each specified time.
-This option can be useful to ensure that a seek point is present at a
-chapter mark or any other designated place in the output file.
-The timestamps must be specified in ascending order.
-@end table
-
-@section Audio Options
-
-@table @option
-@item -aframes @var{number}
-Set the number of audio frames to record.
-@item -ar @var{freq}
-Set the audio sampling frequency. For output streams it is set by
-default to the frequency of the corresponding input stream. For input
-streams this option only makes sense for audio grabbing devices and raw
-demuxers and is mapped to the corresponding demuxer options.
-@item -aq @var{q}
-Set the audio quality (codec-specific, VBR).
-@item -ac @var{channels}
-Set the number of audio channels. For output streams it is set by
-default to the number of input audio channels. For input streams
-this option only makes sense for audio grabbing devices and raw demuxers
-and is mapped to the corresponding demuxer options.
-@item -an
-Disable audio recording.
-@item -acodec @var{codec}
-Force audio codec to @var{codec}. Use the @code{copy} special value to
-specify that the raw codec data must be copied as is.
-@item -newaudio
-Add a new audio track to the output file. If you want to specify parameters,
-do so before @code{-newaudio} (@code{-acodec}, @code{-ab}, etc..).
-
-Mapping will be done automatically, if the number of output streams is equal to
-the number of input streams, else it will pick the first one that matches. You
-can override the mapping using @code{-map} as usual.
-
-Example:
-@example
-ffmpeg -i file.mpg -vcodec copy -acodec ac3 -ab 384k test.mpg -acodec mp2 -ab 192k -newaudio
-@end example
-@item -alang @var{code}
-Set the ISO 639 language code (3 letters) of the current audio stream.
-@end table
-
-@section Advanced Audio options:
-
-@table @option
-@item -atag @var{fourcc/tag}
-Force audio tag/fourcc.
-@item -audio_service_type @var{type}
-Set the type of service that the audio stream contains.
-@table @option
-@item ma
-Main Audio Service (default)
-@item ef
-Effects
-@item vi
-Visually Impaired
-@item hi
-Hearing Impaired
-@item di
-Dialogue
-@item co
-Commentary
-@item em
-Emergency
-@item vo
-Voice Over
-@item ka
-Karaoke
-@end table
-@item -absf @var{bitstream_filter}
-Bitstream filters available are "dump_extra", "remove_extra", "noise", "mp3comp", "mp3decomp".
-@end table
-
-@section Subtitle options:
-
-@table @option
-@item -scodec @var{codec}
-Force subtitle codec ('copy' to copy stream).
-@item -newsubtitle
-Add a new subtitle stream to the current output stream.
-@item -slang @var{code}
-Set the ISO 639 language code (3 letters) of the current subtitle stream.
-@item -sn
-Disable subtitle recording.
-@item -sbsf @var{bitstream_filter}
-Bitstream filters available are "mov2textsub", "text2movsub".
-@example
-ffmpeg -i file.mov -an -vn -sbsf mov2textsub -scodec copy -f rawvideo sub.txt
-@end example
-@end table
-
-@section Audio/Video grab options
-
-@table @option
-@item -vc @var{channel}
-Set video grab channel (DV1394 only).
-@item -tvstd @var{standard}
-Set television standard (NTSC, PAL (SECAM)).
-@item -isync
-Synchronize read on input.
-@end table
-
-@section Advanced options
-
-@table @option
-@item -map @var{input_file_id}.@var{input_stream_id}[:@var{sync_file_id}.@var{sync_stream_id}]
-
-Designate an input stream as a source for the output file. Each input
-stream is identified by the input file index @var{input_file_id} and
-the input stream index @var{input_stream_id} within the input
-file. Both indexes start at 0. If specified,
-@var{sync_file_id}.@var{sync_stream_id} sets which input stream
-is used as a presentation sync reference.
-
-The @code{-map} options must be specified just after the output file.
-If any @code{-map} options are used, the number of @code{-map} options
-on the command line must match the number of streams in the output
-file. The first @code{-map} option on the command line specifies the
-source for output stream 0, the second @code{-map} option specifies
-the source for output stream 1, etc.
-
-For example, if you have two audio streams in the first input file,
-these streams are identified by "0.0" and "0.1". You can use
-@code{-map} to select which stream to place in an output file. For
-example:
-@example
-ffmpeg -i INPUT out.wav -map 0.1
-@end example
-will map the input stream in @file{INPUT} identified by "0.1" to
-the (single) output stream in @file{out.wav}.
-
-For example, to select the stream with index 2 from input file
-@file{a.mov} (specified by the identifier "0.2"), and stream with
-index 6 from input @file{b.mov} (specified by the identifier "1.6"),
-and copy them to the output file @file{out.mov}:
-@example
-ffmpeg -i a.mov -i b.mov -vcodec copy -acodec copy out.mov -map 0.2 -map 1.6
-@end example
-
-To add more streams to the output file, you can use the
-@code{-newaudio}, @code{-newvideo}, @code{-newsubtitle} options.
-
-@item -map_meta_data @var{outfile}[,@var{metadata}]:@var{infile}[,@var{metadata}]
-Deprecated, use @var{-map_metadata} instead.
-
-@item -map_metadata @var{outfile}[,@var{metadata}]:@var{infile}[,@var{metadata}]
-Set metadata information of @var{outfile} from @var{infile}. Note that those
-are file indices (zero-based), not filenames.
-Optional @var{metadata} parameters specify, which metadata to copy - (g)lobal
-(i.e. metadata that applies to the whole file), per-(s)tream, per-(c)hapter or
-per-(p)rogram. All metadata specifiers other than global must be followed by the
-stream/chapter/program number. If metadata specifier is omitted, it defaults to
-global.
-
-By default, global metadata is copied from the first input file to all output files,
-per-stream and per-chapter metadata is copied along with streams/chapters. These
-default mappings are disabled by creating any mapping of the relevant type. A negative
-file index can be used to create a dummy mapping that just disables automatic copying.
-
-For example to copy metadata from the first stream of the input file to global metadata
-of the output file:
-@example
-ffmpeg -i in.ogg -map_metadata 0:0,s0 out.mp3
-@end example
-@item -map_chapters @var{outfile}:@var{infile}
-Copy chapters from @var{infile} to @var{outfile}. If no chapter mapping is specified,
-then chapters are copied from the first input file with at least one chapter to all
-output files. Use a negative file index to disable any chapter copying.
-@item -debug
-Print specific debug info.
-@item -benchmark
-Show benchmarking information at the end of an encode.
-Shows CPU time used and maximum memory consumption.
-Maximum memory consumption is not supported on all systems,
-it will usually display as 0 if not supported.
-@item -dump
-Dump each input packet.
-@item -hex
-When dumping packets, also dump the payload.
-@item -bitexact
-Only use bit exact algorithms (for codec testing).
-@item -ps @var{size}
-Set RTP payload size in bytes.
-@item -re
-Read input at native frame rate. Mainly used to simulate a grab device.
-@item -loop_input
-Loop over the input stream. Currently it works only for image
-streams. This option is used for automatic AVserver testing.
-This option is deprecated, use -loop.
-@item -loop_output @var{number_of_times}
-Repeatedly loop output for formats that support looping such as animated GIF
-(0 will loop the output infinitely).
-This option is deprecated, use -loop.
-@item -threads @var{count}
-Thread count.
-@item -vsync @var{parameter}
-Video sync method.
-
-@table @option
-@item 0
-Each frame is passed with its timestamp from the demuxer to the muxer.
-@item 1
-Frames will be duplicated and dropped to achieve exactly the requested
-constant framerate.
-@item 2
-Frames are passed through with their timestamp or dropped so as to
-prevent 2 frames from having the same timestamp.
-@item -1
-Chooses between 1 and 2 depending on muxer capabilities. This is the
-default method.
-@end table
-
-With -map you can select from which stream the timestamps should be
-taken. You can leave either video or audio unchanged and sync the
-remaining stream(s) to the unchanged one.
-
-@item -async @var{samples_per_second}
-Audio sync method. "Stretches/squeezes" the audio stream to match the timestamps,
-the parameter is the maximum samples per second by which the audio is changed.
--async 1 is a special case where only the start of the audio stream is corrected
-without any later correction.
-@item -copyts
-Copy timestamps from input to output.
-@item -copytb
-Copy input stream time base from input to output when stream copying.
-@item -shortest
-Finish encoding when the shortest input stream ends.
-@item -dts_delta_threshold
-Timestamp discontinuity delta threshold.
-@item -muxdelay @var{seconds}
-Set the maximum demux-decode delay.
-@item -muxpreload @var{seconds}
-Set the initial demux-decode delay.
-@item -streamid @var{output-stream-index}:@var{new-value}
-Assign a new stream-id value to an output stream. This option should be
-specified prior to the output filename to which it applies.
-For the situation where multiple output files exist, a streamid
-may be reassigned to a different value.
-
-For example, to set the stream 0 PID to 33 and the stream 1 PID to 36 for
-an output mpegts file:
-@example
-ffmpeg -i infile -streamid 0:33 -streamid 1:36 out.ts
-@end example
-@end table
-
-@section Preset files
-
-A preset file contains a sequence of @var{option}=@var{value} pairs,
-one for each line, specifying a sequence of options which would be
-awkward to specify on the command line. Lines starting with the hash
-('#') character are ignored and are used to provide comments. Check
-the @file{presets} directory in the Libav source tree for examples.
-
-Preset files are specified with the @code{vpre}, @code{apre},
-@code{spre}, and @code{fpre} options. The @code{fpre} option takes the
-filename of the preset instead of a preset name as input and can be
-used for any kind of codec. For the @code{vpre}, @code{apre}, and
-@code{spre} options, the options specified in a preset file are
-applied to the currently selected codec of the same type as the preset
-option.
-
-The argument passed to the @code{vpre}, @code{apre}, and @code{spre}
-preset options identifies the preset file to use according to the
-following rules:
-
-First ffmpeg searches for a file named @var{arg}.ffpreset in the
-directories @file{$AVCONV_DATADIR} (if set), and @file{$HOME/.avconv}, and in
-the datadir defined at configuration time (usually @file{PREFIX/share/avconv})
-in that order. For example, if the argument is @code{libx264-max}, it will
-search for the file @file{libx264-max.ffpreset}.
-
-If no such file is found, then ffmpeg will search for a file named
-@var{codec_name}-@var{arg}.ffpreset in the above-mentioned
-directories, where @var{codec_name} is the name of the codec to which
-the preset file options will be applied. For example, if you select
-the video codec with @code{-vcodec libx264} and use @code{-vpre max},
-then it will search for the file @file{libx264-max.ffpreset}.
-@c man end
-
-@chapter Tips
-@c man begin TIPS
-
-@itemize
-@item
-For streaming at very low bitrate application, 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:
-
-@example
-ffmpeg -g 3 -r 3 -t 10 -b 50k -s qcif -f rv10 /tmp/b.rm
-@end example
-
-@item
-The parameter 'q' which is displayed while encoding is the current
-quantizer. The value 1 indicates that a very good quality could
-be achieved. The value 31 indicates the worst quality. If q=31 appears
-too often, it means that the encoder cannot compress enough to meet
-your bitrate. You must either increase the bitrate, decrease the
-frame rate or decrease the frame size.
-
-@item
-If your computer is not fast enough, you can speed up the
-compression at the expense of the compression ratio. You can use
-'-me zero' to speed up motion estimation, and '-intra' to disable
-motion estimation completely (you have only I-frames, which means it
-is about as good as JPEG compression).
-
-@item
-To have very low audio bitrates, reduce the sampling frequency
-(down to 22050 Hz for MPEG audio, 22050 or 11025 for AC-3).
-
-@item
-To have a constant quality (but a variable bitrate), use the option
-'-qscale n' when 'n' is between 1 (excellent quality) and 31 (worst
-quality).
-
-@item
-When converting video files, you can use the '-sameq' option which
-uses the same quality factor in the encoder as in the decoder.
-It allows almost lossless encoding.
-
-@end itemize
-@c man end TIPS
-
-@chapter Examples
-@c man begin EXAMPLES
-
-@section Video and Audio grabbing
-
-If you specify the input format and device then ffmpeg can grab video
-and audio directly.
-
-@example
-ffmpeg -f oss -i /dev/dsp -f video4linux2 -i /dev/video0 /tmp/out.mpg
-@end example
-
-Note that you must activate the right video source and channel before
-launching ffmpeg with any TV viewer such as
-@uref{http://linux.bytesex.org/xawtv/, xawtv} by Gerd Knorr. You also
-have to set the audio recording levels correctly with a
-standard mixer.
-
-@section X11 grabbing
-
-Grab the X11 display with ffmpeg via
-
-@example
-ffmpeg -f x11grab -s cif -r 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
-@end example
-
-10 is the x-offset and 20 the y-offset for the grabbing.
-
-@example
-ffmpeg -f x11grab -follow_mouse centered -s cif -r 25 -i :0.0 /tmp/out.mpg
-@end example
-
-The grabbing region follows the mouse pointer, which stays at the center of
-region.
-
-@example
-ffmpeg -f x11grab -follow_mouse 100 -s cif -r 25 -i :0.0 /tmp/out.mpg
-@end example
-
-Only follows when mouse pointer reaches within 100 pixels to the edge of
-region.
-
-@example
-ffmpeg -f x11grab -show_region 1 -s cif -r 25 -i :0.0+10,20 /tmp/out.mpg
-@end example
-
-The grabbing region will be indicated on screen.
-
-@example
-ffmpeg -f x11grab -follow_mouse centered -show_region 1 -s cif -r 25 -i :0.0 /tmp/out.mpg
-@end example
-
-The grabbing region indication will follow the mouse pointer.
-
-
-@section Video and Audio file format conversion
-
-Any supported file format and protocol can serve as input to ffmpeg:
-
-Examples:
-@itemize
-@item
-You can use YUV files as input:
-
-@example
-ffmpeg -i /tmp/test%d.Y /tmp/out.mpg
-@end example
-
-It will use the files:
-@example
-/tmp/test0.Y, /tmp/test0.U, /tmp/test0.V,
-/tmp/test1.Y, /tmp/test1.U, /tmp/test1.V, etc...
-@end example
-
-The Y files use twice the resolution of the U and V files. They are
-raw files, without header. They can be generated by all decent video
-decoders. You must specify the size of the image with the @option{-s} option
-if ffmpeg cannot guess it.
-
-@item
-You can input from a raw YUV420P file:
-
-@example
-ffmpeg -i /tmp/test.yuv /tmp/out.avi
-@end example
-
-test.yuv is a file containing raw YUV planar data. Each frame is composed
-of the Y plane followed by the U and V planes at half vertical and
-horizontal resolution.
-
-@item
-You can output to a raw YUV420P file:
-
-@example
-ffmpeg -i mydivx.avi hugefile.yuv
-@end example
-
-@item
-You can set several input files and output files:
-
-@example
-ffmpeg -i /tmp/a.wav -s 640x480 -i /tmp/a.yuv /tmp/a.mpg
-@end example
-
-Converts the audio file a.wav and the raw YUV video file a.yuv
-to MPEG file a.mpg.
-
-@item
-You can also do audio and video conversions at the same time:
-
-@example
-ffmpeg -i /tmp/a.wav -ar 22050 /tmp/a.mp2
-@end example
-
-Converts a.wav to MPEG audio at 22050 Hz sample rate.
-
-@item
-You can encode to several formats at the same time and define a
-mapping from input stream to output streams:
-
-@example
-ffmpeg -i /tmp/a.wav -ab 64k /tmp/a.mp2 -ab 128k /tmp/b.mp2 -map 0:0 -map 0:0
-@end example
-
-Converts a.wav to a.mp2 at 64 kbits and to b.mp2 at 128 kbits. '-map
-file:index' specifies which input stream is used for each output
-stream, in the order of the definition of output streams.
-
-@item
-You can transcode decrypted VOBs:
-
-@example
-ffmpeg -i snatch_1.vob -f avi -vcodec mpeg4 -b 800k -g 300 -bf 2 -acodec libmp3lame -ab 128k snatch.avi
-@end example
-
-This is a typical DVD ripping example; the input is a VOB file, the
-output an AVI file with MPEG-4 video and MP3 audio. Note that in this
-command we use B-frames so the MPEG-4 stream is DivX5 compatible, and
-GOP size is 300 which means one intra frame every 10 seconds for 29.97fps
-input video. Furthermore, the audio stream is MP3-encoded so you need
-to enable LAME support by passing @code{--enable-libmp3lame} to configure.
-The mapping is particularly useful for DVD transcoding
-to get the desired audio language.
-
-NOTE: To see the supported input formats, use @code{ffmpeg -formats}.
-
-@item
-You can extract images from a video, or create a video from many images:
-
-For extracting images from a video:
-@example
-ffmpeg -i foo.avi -r 1 -s WxH -f image2 foo-%03d.jpeg
-@end example
-
-This will extract one video frame per second from the video and will
-output them in files named @file{foo-001.jpeg}, @file{foo-002.jpeg},
-etc. Images will be rescaled to fit the new WxH values.
-
-If you want to extract just a limited number of frames, you can use the
-above command in combination with the -vframes or -t option, or in
-combination with -ss to start extracting from a certain point in time.
-
-For creating a video from many images:
-@example
-ffmpeg -f image2 -i foo-%03d.jpeg -r 12 -s WxH foo.avi
-@end example
-
-The syntax @code{foo-%03d.jpeg} specifies to use a decimal number
-composed of three digits padded with zeroes to express the sequence
-number. It is the same syntax supported by the C printf function, but
-only formats accepting a normal integer are suitable.
-
-@item
-You can put many streams of the same type in the output:
-
-@example
-ffmpeg -i test1.avi -i test2.avi -vcodec copy -acodec copy -vcodec copy -acodec copy test12.avi -newvideo -newaudio
-@end example
-
-In addition to the first video and audio streams, the resulting
-output file @file{test12.avi} will contain the second video
-and the second audio stream found in the input streams list.
-
-The @code{-newvideo}, @code{-newaudio} and @code{-newsubtitle}
-options have to be specified immediately after the name of the output
-file to which you want to add them.
-
-@end itemize
-@c man end EXAMPLES
-
-@include eval.texi
-@include encoders.texi
-@include demuxers.texi
-@include muxers.texi
-@include indevs.texi
-@include outdevs.texi
-@include protocols.texi
-@include bitstream_filters.texi
-@include filters.texi
-@include metadata.texi
-
-@ignore
-
-@setfilename ffmpeg
-@settitle ffmpeg video converter
-
-@c man begin SEEALSO
-avplay(1), avprobe(1), avserver(1) and the Libav HTML documentation
-@c man end
-
-@c man begin AUTHORS
-The Libav developers
-@c man end
-
-@end ignore
-
-@bye