1 \input texinfo @c -*- texinfo -*-
3 @settitle FFmpeg Documentation
6 @center @titlefont{FFmpeg Documentation}
12 The generic syntax is:
16 ffmpeg [[infile options][@option{-i} @var{infile}]]... @{[outfile options] @var{outfile}@}...
21 @c man begin DESCRIPTION
23 FFmpeg is a very fast video and audio converter. It can also grab from
24 a live audio/video source.
26 The command line interface is designed to be intuitive, in the sense
27 that FFmpeg tries to figure out all parameters that can possibly be
28 derived automatically. You usually only have to specify the target
31 FFmpeg can also convert from any sample rate to any other, and resize
32 video on the fly with a high quality polyphase filter.
34 As a general rule, options are applied to the next specified
35 file. Therefore, order is important, and you can have the same
36 option on the command line multiple times. Each occurrence is
37 then applied to the next input or output file.
39 * To set the video bitrate of the output file to 64kbit/s:
41 ffmpeg -i input.avi -b 64k output.avi
44 * To force the frame rate of the output file to 24 fps:
46 ffmpeg -i input.avi -r 24 output.avi
49 * To force the frame rate of the input file (valid for raw formats only)
50 to 1 fps and the frame rate of the output file to 24 fps:
52 ffmpeg -r 1 -i input.m2v -r 24 output.avi
55 The format option may be needed for raw input files.
57 By default, FFmpeg tries to convert as losslessly as possible: It
58 uses the same audio and video parameters for the outputs as the one
59 specified for the inputs.
61 @c man end DESCRIPTION
66 @include fftools-common-opts.texi
75 @item -i @var{filename}
79 Overwrite output files.
81 @item -t @var{duration}
82 Restrict the transcoded/captured video sequence
83 to the duration specified in seconds.
84 @code{hh:mm:ss[.xxx]} syntax is also supported.
86 @item -fs @var{limit_size}
87 Set the file size limit.
89 @item -ss @var{position}
90 Seek to given time position in seconds.
91 @code{hh:mm:ss[.xxx]} syntax is also supported.
93 @item -itsoffset @var{offset}
94 Set the input time offset in seconds.
95 @code{[-]hh:mm:ss[.xxx]} syntax is also supported.
96 This option affects all the input files that follow it.
97 The offset is added to the timestamps of the input files.
98 Specifying a positive offset means that the corresponding
99 streams are delayed by 'offset' seconds.
101 @item -timestamp @var{time}
102 Set the recording timestamp in the container.
103 The syntax for @var{time} is:
105 now|([(YYYY-MM-DD|YYYYMMDD)[T|t| ]]((HH[:MM[:SS[.m...]]])|(HH[MM[SS[.m...]]]))[Z|z])
107 If the value is "now" it takes the current time.
108 Time is local time unless 'Z' or 'z' is appended, in which case it is
110 If the year-month-day part is not specified it takes the current
113 @item -metadata @var{key}=@var{value}
114 Set a metadata key/value pair.
116 For example, for setting the title in the output file:
118 ffmpeg -i in.avi -metadata title="my title" out.flv
121 @item -v @var{number}
122 Set the logging verbosity level.
124 @item -target @var{type}
125 Specify target file type ("vcd", "svcd", "dvd", "dv", "dv50", "pal-vcd",
126 "ntsc-svcd", ... ). All the format options (bitrate, codecs,
127 buffer sizes) are then set automatically. You can just type:
130 ffmpeg -i myfile.avi -target vcd /tmp/vcd.mpg
133 Nevertheless you can specify additional options as long as you know
134 they do not conflict with the standard, as in:
137 ffmpeg -i myfile.avi -target vcd -bf 2 /tmp/vcd.mpg
140 @item -dframes @var{number}
141 Set the number of data frames to record.
143 @item -scodec @var{codec}
144 Force subtitle codec ('copy' to copy stream).
147 Add a new subtitle stream to the current output stream.
149 @item -slang @var{code}
150 Set the ISO 639 language code (3 letters) of the current subtitle stream.
154 @section Video Options
157 @item -b @var{bitrate}
158 Set the video bitrate in bit/s (default = 200 kb/s).
159 @item -vframes @var{number}
160 Set the number of video frames to record.
162 Set frame rate (Hz value, fraction or abbreviation), (default = 25).
164 Set frame size. The format is @samp{wxh} (ffserver default = 160x128, ffmpeg default = same as source).
165 The following abbreviations are recognized:
227 @item -aspect @var{aspect}
228 Set aspect ratio (4:3, 16:9 or 1.3333, 1.7777).
229 @item -croptop @var{size} (deprecated - use the crop filter instead)
230 Set top crop band size (in pixels).
231 @item -cropbottom @var{size} (deprecated - use the crop filter instead)
232 Set bottom crop band size (in pixels).
233 @item -cropleft @var{size} (deprecated - use the crop filter instead)
234 Set left crop band size (in pixels).
235 @item -cropright @var{size} (deprecated - use the crop filter instead)
236 Set right crop band size (in pixels).
237 @item -padtop @var{size}
238 @item -padbottom @var{size}
239 @item -padleft @var{size}
240 @item -padright @var{size}
241 @item -padcolor @var{hex_color}
242 All the pad options have been removed. Use -vf
243 pad=width:height:x:y:color instead.
245 Disable video recording.
246 @item -bt @var{tolerance}
247 Set video bitrate tolerance (in bits, default 4000k).
248 Has a minimum value of: (target_bitrate/target_framerate).
249 In 1-pass mode, bitrate tolerance specifies how far ratecontrol is
250 willing to deviate from the target average bitrate value. This is
251 not related to min/max bitrate. Lowering tolerance too much has
252 an adverse effect on quality.
253 @item -maxrate @var{bitrate}
254 Set max video bitrate (in bit/s).
255 Requires -bufsize to be set.
256 @item -minrate @var{bitrate}
257 Set min video bitrate (in bit/s).
258 Most useful in setting up a CBR encode:
260 ffmpeg -i myfile.avi -b 4000k -minrate 4000k -maxrate 4000k -bufsize 1835k out.m2v
262 It is of little use elsewise.
263 @item -bufsize @var{size}
264 Set video buffer verifier buffer size (in bits).
265 @item -vcodec @var{codec}
266 Force video codec to @var{codec}. Use the @code{copy} special value to
267 tell that the raw codec data must be copied as is.
269 Use same video quality as source (implies VBR).
272 Select the pass number (1 or 2). It is used to do two-pass
273 video encoding. The statistics of the video are recorded in the first
274 pass into a log file (see also the option -passlogfile),
275 and in the second pass that log file is used to generate the video
276 at the exact requested bitrate.
277 On pass 1, you may just deactivate audio and set output to null,
278 examples for Windows and Unix:
280 ffmpeg -i foo.mov -vcodec libxvid -pass 1 -an -f rawvideo -y NUL
281 ffmpeg -i foo.mov -vcodec libxvid -pass 1 -an -f rawvideo -y /dev/null
284 @item -passlogfile @var{prefix}
285 Set two-pass log file name prefix to @var{prefix}, the default file name
286 prefix is ``ffmpeg2pass''. The complete file name will be
287 @file{PREFIX-N.log}, where N is a number specific to the output
291 Add a new video stream to the current output stream.
293 @item -vlang @var{code}
294 Set the ISO 639 language code (3 letters) of the current video stream.
296 @item -vf @var{filter_graph}
297 @var{filter_graph} is a description of the filter graph to apply to
299 Use the option "-filters" to show all the available filters (including
300 also sources and sinks).
304 @section Advanced Video Options
307 @item -pix_fmt @var{format}
308 Set pixel format. Use 'list' as parameter to show all the supported
310 @item -sws_flags @var{flags}
312 @item -g @var{gop_size}
313 Set the group of pictures size.
315 Use only intra frames.
318 @item -qscale @var{q}
319 Use fixed video quantizer scale (VBR).
321 minimum video quantizer scale (VBR)
323 maximum video quantizer scale (VBR)
325 maximum difference between the quantizer scales (VBR)
326 @item -qblur @var{blur}
327 video quantizer scale blur (VBR) (range 0.0 - 1.0)
328 @item -qcomp @var{compression}
329 video quantizer scale compression (VBR) (default 0.5).
330 Constant of ratecontrol equation. Recommended range for default rc_eq: 0.0-1.0
332 @item -lmin @var{lambda}
333 minimum video lagrange factor (VBR)
334 @item -lmax @var{lambda}
335 max video lagrange factor (VBR)
336 @item -mblmin @var{lambda}
337 minimum macroblock quantizer scale (VBR)
338 @item -mblmax @var{lambda}
339 maximum macroblock quantizer scale (VBR)
341 These four options (lmin, lmax, mblmin, mblmax) use 'lambda' units,
342 but you may use the QP2LAMBDA constant to easily convert from 'q' units:
344 ffmpeg -i src.ext -lmax 21*QP2LAMBDA dst.ext
347 @item -rc_init_cplx @var{complexity}
348 initial complexity for single pass encoding
349 @item -b_qfactor @var{factor}
350 qp factor between P- and B-frames
351 @item -i_qfactor @var{factor}
352 qp factor between P- and I-frames
353 @item -b_qoffset @var{offset}
354 qp offset between P- and B-frames
355 @item -i_qoffset @var{offset}
356 qp offset between P- and I-frames
357 @item -rc_eq @var{equation}
358 Set rate control equation (@pxref{FFmpeg formula
359 evaluator}) (default = @code{tex^qComp}).
360 @item -rc_override @var{override}
361 rate control override for specific intervals
362 @item -me_method @var{method}
363 Set motion estimation method to @var{method}.
364 Available methods are (from lowest to best quality):
367 Try just the (0, 0) vector.
376 exhaustive search (slow and marginally better than epzs)
379 @item -dct_algo @var{algo}
380 Set DCT algorithm to @var{algo}. Available values are:
383 FF_DCT_AUTO (default)
396 @item -idct_algo @var{algo}
397 Set IDCT algorithm to @var{algo}. Available values are:
400 FF_IDCT_AUTO (default)
424 Set error resilience to @var{n}.
427 FF_ER_CAREFUL (default)
433 FF_ER_VERY_AGGRESSIVE
436 @item -ec @var{bit_mask}
437 Set error concealment to @var{bit_mask}. @var{bit_mask} is a bit mask of
438 the following values:
441 FF_EC_GUESS_MVS (default = enabled)
443 FF_EC_DEBLOCK (default = enabled)
446 @item -bf @var{frames}
447 Use 'frames' B-frames (supported for MPEG-1, MPEG-2 and MPEG-4).
448 @item -mbd @var{mode}
452 FF_MB_DECISION_SIMPLE: Use mb_cmp (cannot change it yet in FFmpeg).
454 FF_MB_DECISION_BITS: Choose the one which needs the fewest bits.
456 FF_MB_DECISION_RD: rate distortion
460 Use four motion vector by macroblock (MPEG-4 only).
462 Use data partitioning (MPEG-4 only).
463 @item -bug @var{param}
464 Work around encoder bugs that are not auto-detected.
465 @item -strict @var{strictness}
466 How strictly to follow the standards.
468 Enable Advanced intra coding (h263+).
470 Enable Unlimited Motion Vector (h263+)
473 Deinterlace pictures.
475 Force interlacing support in encoder (MPEG-2 and MPEG-4 only).
476 Use this option if your input file is interlaced and you want
477 to keep the interlaced format for minimum losses.
478 The alternative is to deinterlace the input stream with
479 @option{-deinterlace}, but deinterlacing introduces losses.
481 Calculate PSNR of compressed frames.
483 Dump video coding statistics to @file{vstats_HHMMSS.log}.
484 @item -vstats_file @var{file}
485 Dump video coding statistics to @var{file}.
487 top=1/bottom=0/auto=-1 field first
488 @item -dc @var{precision}
490 @item -vtag @var{fourcc/tag}
491 Force video tag/fourcc.
494 @item -vbsf @var{bitstream_filter}
495 Bitstream filters available are "dump_extra", "remove_extra", "noise", "h264_mp4toannexb", "imxdump", "mjpegadump".
497 ffmpeg -i h264.mp4 -vcodec copy -vbsf h264_mp4toannexb -an out.h264
501 @section Audio Options
504 @item -aframes @var{number}
505 Set the number of audio frames to record.
507 Set the audio sampling frequency (default = 44100 Hz).
508 @item -ab @var{bitrate}
509 Set the audio bitrate in bit/s (default = 64k).
511 Set the audio quality (codec-specific, VBR).
512 @item -ac @var{channels}
513 Set the number of audio channels. For input streams it is set by
514 default to 1, for output streams it is set by default to the same
515 number of audio channels in input. If the input file has audio streams
516 with different channel count, the behaviour is undefined.
518 Disable audio recording.
519 @item -acodec @var{codec}
520 Force audio codec to @var{codec}. Use the @code{copy} special value to
521 specify that the raw codec data must be copied as is.
523 Add a new audio track to the output file. If you want to specify parameters,
524 do so before @code{-newaudio} (@code{-acodec}, @code{-ab}, etc..).
526 Mapping will be done automatically, if the number of output streams is equal to
527 the number of input streams, else it will pick the first one that matches. You
528 can override the mapping using @code{-map} as usual.
532 ffmpeg -i file.mpg -vcodec copy -acodec ac3 -ab 384k test.mpg -acodec mp2 -ab 192k -newaudio
534 @item -alang @var{code}
535 Set the ISO 639 language code (3 letters) of the current audio stream.
538 @section Advanced Audio options:
541 @item -atag @var{fourcc/tag}
542 Force audio tag/fourcc.
543 @item -absf @var{bitstream_filter}
544 Bitstream filters available are "dump_extra", "remove_extra", "noise", "mp3comp", "mp3decomp".
547 @section Subtitle options:
550 @item -scodec @var{codec}
551 Force subtitle codec ('copy' to copy stream).
553 Add a new subtitle stream to the current output stream.
554 @item -slang @var{code}
555 Set the ISO 639 language code (3 letters) of the current subtitle stream.
557 Disable subtitle recording.
558 @item -sbsf @var{bitstream_filter}
559 Bitstream filters available are "mov2textsub", "text2movsub".
561 ffmpeg -i file.mov -an -vn -sbsf mov2textsub -scodec copy -f rawvideo sub.txt
565 @section Audio/Video grab options
568 @item -vc @var{channel}
569 Set video grab channel (DV1394 only).
570 @item -tvstd @var{standard}
571 Set television standard (NTSC, PAL (SECAM)).
573 Synchronize read on input.
576 @section Advanced options
579 @item -map @var{input_stream_id}[:@var{sync_stream_id}]
580 Set stream mapping from input streams to output streams.
581 Just enumerate the input streams in the order you want them in the output.
582 @var{sync_stream_id} if specified sets the input stream to sync
584 @item -map_meta_data @var{outfile}:@var{infile}
585 Set meta data information of @var{outfile} from @var{infile}.
587 Print specific debug info.
589 Show benchmarking information at the end of an encode.
590 Shows CPU time used and maximum memory consumption.
591 Maximum memory consumption is not supported on all systems,
592 it will usually display as 0 if not supported.
594 Dump each input packet.
596 When dumping packets, also dump the payload.
598 Only use bit exact algorithms (for codec testing).
600 Set RTP payload size in bytes.
602 Read input at native frame rate. Mainly used to simulate a grab device.
604 Loop over the input stream. Currently it works only for image
605 streams. This option is used for automatic FFserver testing.
606 @item -loop_output @var{number_of_times}
607 Repeatedly loop output for formats that support looping such as animated GIF
608 (0 will loop the output infinitely).
609 @item -threads @var{count}
611 @item -vsync @var{parameter}
613 0 Each frame is passed with its timestamp from the demuxer to the muxer
614 1 Frames will be duplicated and dropped to achieve exactly the requested
616 2 Frames are passed through with their timestamp or dropped so as to prevent
617 2 frames from having the same timestamp
618 -1 Chooses between 1 and 2 depending on muxer capabilities. This is the default method.
620 With -map you can select from
621 which stream the timestamps should be taken. You can leave either video or
622 audio unchanged and sync the remaining stream(s) to the unchanged one.
623 @item -async @var{samples_per_second}
624 Audio sync method. "Stretches/squeezes" the audio stream to match the timestamps,
625 the parameter is the maximum samples per second by which the audio is changed.
626 -async 1 is a special case where only the start of the audio stream is corrected
627 without any later correction.
629 Copy timestamps from input to output.
631 Finish encoding when the shortest input stream ends.
632 @item -dts_delta_threshold
633 Timestamp discontinuity delta threshold.
634 @item -muxdelay @var{seconds}
635 Set the maximum demux-decode delay.
636 @item -muxpreload @var{seconds}
637 Set the initial demux-decode delay.
638 @item -streamid @var{output-stream-index}:@var{new-value}
639 Assign a new value to a stream's stream-id field in the next output file.
640 All stream-id fields are reset to default for each output file.
642 For example, to set the stream 0 PID to 33 and the stream 1 PID to 36 for
643 an output mpegts file:
645 ffmpeg -i infile -streamid 0:33 -streamid 1:36 out.ts
649 @section Preset files
651 A preset file contains a sequence of @var{option}=@var{value} pairs,
652 one for each line, specifying a sequence of options which would be
653 awkward to specify on the command line. Lines starting with the hash
654 ('#') character are ignored and are used to provide comments. Check
655 the @file{ffpresets} directory in the FFmpeg source tree for examples.
657 Preset files are specified with the @code{vpre}, @code{apre},
658 @code{spre}, and @code{fpre} options. The @code{fpre} option takes the
659 filename of the preset instead of a preset name as input and can be
660 used for any kind of codec. For the @code{vpre}, @code{apre}, and
661 @code{spre} options, the options specified in a preset file are
662 applied to the currently selected codec of the same type as the preset
665 The argument passed to the @code{vpre}, @code{apre}, and @code{spre}
666 preset options identifies the preset file to use according to the
669 First ffmpeg searches for a file named @var{arg}.ffpreset in the
670 directories @file{$FFMPEG_DATADIR} (if set), and @file{$HOME/.ffmpeg}, and in
671 the datadir defined at configuration time (usually @file{PREFIX/share/ffmpeg})
672 in that order. For example, if the argument is @code{libx264-max}, it will
673 search for the file @file{libx264-max.ffpreset}.
675 If no such file is found, then ffmpeg will search for a file named
676 @var{codec_name}-@var{arg}.ffpreset in the above-mentioned
677 directories, where @var{codec_name} is the name of the codec to which
678 the preset file options will be applied. For example, if you select
679 the video codec with @code{-vcodec libx264} and use @code{-vpre max},
680 then it will search for the file @file{libx264-max.ffpreset}.
682 @anchor{FFmpeg formula evaluator}
683 @section FFmpeg formula evaluator
685 When evaluating a rate control string, FFmpeg uses an internal formula
688 The following binary operators are available: @code{+}, @code{-},
689 @code{*}, @code{/}, @code{^}.
691 The following unary operators are available: @code{+}, @code{-},
694 The following statements are available: @code{ld}, @code{st},
697 The following functions are available:
725 The following constants are available:
756 For streaming at very low bitrate application, use a low frame rate
757 and a small GOP size. This is especially true for RealVideo where
758 the Linux player does not seem to be very fast, so it can miss
759 frames. An example is:
762 ffmpeg -g 3 -r 3 -t 10 -b 50k -s qcif -f rv10 /tmp/b.rm
766 The parameter 'q' which is displayed while encoding is the current
767 quantizer. The value 1 indicates that a very good quality could
768 be achieved. The value 31 indicates the worst quality. If q=31 appears
769 too often, it means that the encoder cannot compress enough to meet
770 your bitrate. You must either increase the bitrate, decrease the
771 frame rate or decrease the frame size.
774 If your computer is not fast enough, you can speed up the
775 compression at the expense of the compression ratio. You can use
776 '-me zero' to speed up motion estimation, and '-intra' to disable
777 motion estimation completely (you have only I-frames, which means it
778 is about as good as JPEG compression).
781 To have very low audio bitrates, reduce the sampling frequency
782 (down to 22050 Hz for MPEG audio, 22050 or 11025 for AC-3).
785 To have a constant quality (but a variable bitrate), use the option
786 '-qscale n' when 'n' is between 1 (excellent quality) and 31 (worst
790 When converting video files, you can use the '-sameq' option which
791 uses the same quality factor in the encoder as in the decoder.
792 It allows almost lossless encoding.
798 @c man begin EXAMPLES
800 @section Video and Audio grabbing
802 FFmpeg can grab video and audio from devices given that you specify the input
806 ffmpeg -f oss -i /dev/dsp -f video4linux2 -i /dev/video0 /tmp/out.mpg
809 Note that you must activate the right video source and channel before
810 launching FFmpeg with any TV viewer such as xawtv
811 (@url{http://linux.bytesex.org/xawtv/}) by Gerd Knorr. You also
812 have to set the audio recording levels correctly with a
815 @section X11 grabbing
817 FFmpeg can grab the X11 display.
820 ffmpeg -f x11grab -s cif -r 25 -i :0.0 /tmp/out.mpg
823 0.0 is display.screen number of your X11 server, same as
824 the DISPLAY environment variable.
827 ffmpeg -f x11grab -s cif -r 25 -i :0.0+10,20 /tmp/out.mpg
830 0.0 is display.screen number of your X11 server, same as the DISPLAY environment
831 variable. 10 is the x-offset and 20 the y-offset for the grabbing.
833 @section Video and Audio file format conversion
835 * FFmpeg can use any supported file format and protocol as input:
839 * You can use YUV files as input:
842 ffmpeg -i /tmp/test%d.Y /tmp/out.mpg
845 It will use the files:
847 /tmp/test0.Y, /tmp/test0.U, /tmp/test0.V,
848 /tmp/test1.Y, /tmp/test1.U, /tmp/test1.V, etc...
851 The Y files use twice the resolution of the U and V files. They are
852 raw files, without header. They can be generated by all decent video
853 decoders. You must specify the size of the image with the @option{-s} option
854 if FFmpeg cannot guess it.
856 * You can input from a raw YUV420P file:
859 ffmpeg -i /tmp/test.yuv /tmp/out.avi
862 test.yuv is a file containing raw YUV planar data. Each frame is composed
863 of the Y plane followed by the U and V planes at half vertical and
864 horizontal resolution.
866 * You can output to a raw YUV420P file:
869 ffmpeg -i mydivx.avi hugefile.yuv
872 * You can set several input files and output files:
875 ffmpeg -i /tmp/a.wav -s 640x480 -i /tmp/a.yuv /tmp/a.mpg
878 Converts the audio file a.wav and the raw YUV video file a.yuv
881 * You can also do audio and video conversions at the same time:
884 ffmpeg -i /tmp/a.wav -ar 22050 /tmp/a.mp2
887 Converts a.wav to MPEG audio at 22050 Hz sample rate.
889 * You can encode to several formats at the same time and define a
890 mapping from input stream to output streams:
893 ffmpeg -i /tmp/a.wav -ab 64k /tmp/a.mp2 -ab 128k /tmp/b.mp2 -map 0:0 -map 0:0
896 Converts a.wav to a.mp2 at 64 kbits and to b.mp2 at 128 kbits. '-map
897 file:index' specifies which input stream is used for each output
898 stream, in the order of the definition of output streams.
900 * You can transcode decrypted VOBs:
903 ffmpeg -i snatch_1.vob -f avi -vcodec mpeg4 -b 800k -g 300 -bf 2 -acodec libmp3lame -ab 128k snatch.avi
906 This is a typical DVD ripping example; the input is a VOB file, the
907 output an AVI file with MPEG-4 video and MP3 audio. Note that in this
908 command we use B-frames so the MPEG-4 stream is DivX5 compatible, and
909 GOP size is 300 which means one intra frame every 10 seconds for 29.97fps
910 input video. Furthermore, the audio stream is MP3-encoded so you need
911 to enable LAME support by passing @code{--enable-libmp3lame} to configure.
912 The mapping is particularly useful for DVD transcoding
913 to get the desired audio language.
915 NOTE: To see the supported input formats, use @code{ffmpeg -formats}.
917 * You can extract images from a video, or create a video from many images:
919 For extracting images from a video:
921 ffmpeg -i foo.avi -r 1 -s WxH -f image2 foo-%03d.jpeg
924 This will extract one video frame per second from the video and will
925 output them in files named @file{foo-001.jpeg}, @file{foo-002.jpeg},
926 etc. Images will be rescaled to fit the new WxH values.
928 If you want to extract just a limited number of frames, you can use the
929 above command in combination with the -vframes or -t option, or in
930 combination with -ss to start extracting from a certain point in time.
932 For creating a video from many images:
934 ffmpeg -f image2 -i foo-%03d.jpeg -r 12 -s WxH foo.avi
937 The syntax @code{foo-%03d.jpeg} specifies to use a decimal number
938 composed of three digits padded with zeroes to express the sequence
939 number. It is the same syntax supported by the C printf function, but
940 only formats accepting a normal integer are suitable.
942 * You can put many streams of the same type in the output:
945 ffmpeg -i test1.avi -i test2.avi -vcodec copy -acodec copy -vcodec copy -acodec copy test12.avi -newvideo -newaudio
948 In addition to the first video and audio streams, the resulting
949 output file @file{test12.avi} will contain the second video
950 and the second audio stream found in the input streams list.
952 The @code{-newvideo}, @code{-newaudio} and @code{-newsubtitle}
953 options have to be specified immediately after the name of the output
954 file to which you want to add them.
958 @include outdevs.texi
959 @include protocols.texi
960 @include filters.texi
965 @settitle FFmpeg video converter
968 ffplay(1), ffprobe(1), ffserver(1) and the FFmpeg HTML documentation
972 The FFmpeg developers