ffmpeg | branch: master | Gyan Doshi <ffm...@gyani.pro> | Sun Feb 17 11:46:31 2019 +0530| [a9452fe6dc2ecf5b2249aae6d770655095b4e232] | committer: Gyan Doshi
doc/fftools-common-opts: add example for codec option stream specifiers > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=a9452fe6dc2ecf5b2249aae6d770655095b4e232 --- doc/fftools-common-opts.texi | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/doc/fftools-common-opts.texi b/doc/fftools-common-opts.texi index 43c1f4d2d6..f4820fd293 100644 --- a/doc/fftools-common-opts.texi +++ b/doc/fftools-common-opts.texi @@ -365,7 +365,15 @@ ffmpeg -i input.flac -id3v2_version 3 out.mp3 @end example All codec AVOptions are per-stream, and thus a stream specifier -should be attached to them. +should be attached to them: +@example +ffmpeg -i multichannel.mxf -map 0:v:0 -map 0:a:0 -map 0:a:0 -c:a:0 ac3 -b:a:0 640k -ac:a:1 2 -c:a:1 aac -b:2 128k out.mp4 +@end example + +In the above example, a multichannel audio stream is mapped twice for output. +The first instance is encoded with codec ac3 and bitrate 640k. +The second instance is downmixed to 2 channels and encoded with codec aac. A bitrate of 128k is specified for it using +absolute index of the output stream. Note: the @option{-nooption} syntax cannot be used for boolean AVOptions, use @option{-option 0}/@option{-option 1}. _______________________________________________ ffmpeg-cvslog mailing list ffmpeg-cvslog@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog
