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| author | Michael Niedermayer <michaelni@gmx.at> | 2013-11-17 16:00:47 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2013-11-17 16:08:06 +0100 |
| commit | 74a8fe9483acbfd5dce34d2571a1d47e4dc654f3 (patch) | |
| tree | c684fc3de0526c926e3ac5d6455944835164c502 | |
| parent | 459c7cb25645ac56a41b0e78b4d665a46dd36e29 (diff) | |
| download | ffmpeg-74a8fe9483acbfd5dce34d2571a1d47e4dc654f3.tar.gz | |
doc/ffmpeg: document qscale and video stream special case
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
| -rw-r--r-- | doc/ffmpeg.texi | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/doc/ffmpeg.texi b/doc/ffmpeg.texi index 2bb65d5bfa..af4cf9fb25 100644 --- a/doc/ffmpeg.texi +++ b/doc/ffmpeg.texi @@ -348,8 +348,13 @@ Stop writing to the stream after @var{framecount} frames. @item -q[:@var{stream_specifier}] @var{q} (@emph{output,per-stream}) @itemx -qscale[:@var{stream_specifier}] @var{q} (@emph{output,per-stream}) -Use fixed quality scale (VBR). The meaning of @var{q} is +Use fixed quality scale (VBR). The meaning of @var{q}/@var{qscale} is codec-dependent. +If @var{qscale} is used without a @var{stream_specifier} then it applies only +to the video stream, this is to maintain compatibility with previous behavior +and as specifying the same codec specific value to 2 different codecs that is +audio and video generally is not what is intended when no stream_specifier is +used. @anchor{filter_option} @item -filter[:@var{stream_specifier}] @var{filtergraph} (@emph{output,per-stream}) |