doc/ffmpeg: note that -t is also an input option

Signed-off-by: Lou Logan <lou@lrcd.com>
This commit is contained in:
Lou Logan 2014-04-07 11:59:51 -08:00
parent 2dbf5e7038
commit 5b1a56b34b
1 changed files with 7 additions and 2 deletions

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@ -272,8 +272,13 @@ ffmpeg -i INPUT -map 0 -c copy -c:v:1 libx264 -c:a:137 libvorbis OUTPUT
will copy all the streams except the second video, which will be encoded with will copy all the streams except the second video, which will be encoded with
libx264, and the 138th audio, which will be encoded with libvorbis. libx264, and the 138th audio, which will be encoded with libvorbis.
@item -t @var{duration} (@emph{output}) @item -t @var{duration} (@emph{input/output})
Stop writing the output after its duration reaches @var{duration}. When used as an input option (before @code{-i}), limit the @var{duration} of
data read from the input file.
When used as an output option (before an output filename), stop writing the
output after its duration reaches @var{duration}.
@var{duration} may be a number in seconds, or in @code{hh:mm:ss[.xxx]} form. @var{duration} may be a number in seconds, or in @code{hh:mm:ss[.xxx]} form.
-to and -t are mutually exclusive and -t has priority. -to and -t are mutually exclusive and -t has priority.