2016-12-31 1:08 GMT+08:00 Moritz Barsnick <barsn...@gmx.net>:
> 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 <barsn...@gmx.net>
> ---
> 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
> --
> 2.7.4
>
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>
LTGM, Thanks!
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