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| author | Paul B Mahol <onemda@gmail.com> | 2018-03-20 18:02:26 +0100 |
|---|---|---|
| committer | Paul B Mahol <onemda@gmail.com> | 2018-03-23 10:11:19 +0100 |
| commit | 4e1307c0f76d015941a1217bcd44a20f25e04fad (patch) | |
| tree | 85d536d3c70992dbe230ea075edcc6c4e0a6ea88 /doc | |
| parent | abf35afb6f70f2b1fdf99ce48112ad314bd8ca0f (diff) | |
avfilter/af_channelsplit: add channels option
So user can pick which channels to extract.
Signed-off-by: Paul B Mahol <onemda@gmail.com>
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/filters.texi | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/doc/filters.texi b/doc/filters.texi index d6ea56b851..870c50441b 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -2208,8 +2208,17 @@ It accepts the following parameters: @table @option @item channel_layout The channel layout of the input stream. The default is "stereo". +@item channels +A channel layout describing the channels to be extracted as separate output streams +or "all" to extract each input channel as a separate stream. The default is "all". + +Choosing channels not present in channel layout in the input will result in an error. @end table +@subsection Examples + +@itemize +@item For example, assuming a stereo input MP3 file, @example ffmpeg -i in.mp3 -filter_complex channelsplit out.mkv @@ -2217,6 +2226,7 @@ ffmpeg -i in.mp3 -filter_complex channelsplit out.mkv will create an output Matroska file with two audio streams, one containing only the left channel and the other the right channel. +@item Split a 5.1 WAV file into per-channel files: @example ffmpeg -i in.wav -filter_complex @@ -2226,6 +2236,14 @@ front_center.wav -map '[LFE]' lfe.wav -map '[SL]' side_left.wav -map '[SR]' side_right.wav @end example +@item +Extract only LFE from a 5.1 WAV file: +@example +ffmpeg -i in.wav -filter_complex 'channelsplit=channel_layout=5.1:channels=LFE[LFE]' +-map '[LFE]' lfe.wav +@end example +@end itemize + @section chorus Add a chorus effect to the audio. |