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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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doc/ffmpeg.texi
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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
libx264, and the 138th audio, which will be encoded with libvorbis.
@item -t @var{duration} (@emph{output})
Stop writing the output after its duration reaches @var{duration}.
@item -t @var{duration} (@emph{input/output})
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.
-to and -t are mutually exclusive and -t has priority.