ffmpeg | branch: master | Moritz Barsnick <barsnick@gmx.net> | Fri Dec 30 18:08:14 2016 +0100| [5dbce5120b4e05dd6d784e7ed9921c1f276acea3] | committer: Michael Niedermayer doc: document cutoff option to ac3 and adjust the option's global documentation cutoff is implemented as an option global to lavc, but supported only by a few encoders. This fact is now reflected in its documentation. ac3's support of this option is added for completeness. Signed-off-by: Moritz Barsnick <barsnick@gmx.net> Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=5dbce5120b4e05dd6d...

doc/codecs.texi | 3 ++- doc/encoders.texi | 4 ++++ 2 files changed, 6 insertions(+), 1 deletion(-) diff --git a/doc/codecs.texi b/doc/codecs.texi index 9a3a56d..6093605 100644 --- a/doc/codecs.texi +++ b/doc/codecs.texi @@ -138,7 +138,8 @@ Set audio sampling rate (in Hz). Set number of audio channels. @item cutoff @var{integer} (@emph{encoding,audio}) -Set cutoff bandwidth. +Set cutoff bandwidth. (Supported only by selected encoders, see +their respective documentation sections.) @item frame_size @var{integer} (@emph{encoding,audio}) Set audio frame size. diff --git a/doc/encoders.texi b/doc/encoders.texi index 5e311cb..8137465 100644 --- a/doc/encoders.texi +++ b/doc/encoders.texi @@ -488,6 +488,10 @@ is an optional AC-3 feature that increases quality by selectively encoding the left/right channels as mid/side. This option is enabled by default, and it is highly recommended that it be left as enabled except for testing purposes. +@item cutoff @var{frequency} +Set lowpass cutoff frequency. If unspecified, the encoder selects a default +determined by various other encoding parameters. + @end table @subsection Floating-Point-Only AC-3 Encoding Options