[FFmpeg-devel] [PATCH] doc/ffmpeg: note that -t is also an input option

Lou Logan lou at lrcd.com
Mon Apr 7 21:59:51 CEST 2014

 doc/ffmpeg.texi | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/doc/ffmpeg.texi b/doc/ffmpeg.texi
index 8d646f5..3b09c8e 100644
--- a/doc/ffmpeg.texi
+++ b/doc/ffmpeg.texi
@@ -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.
- at item -t @var{duration} (@emph{output})
-Stop writing the output after its duration reaches @var{duration}.
+ at item -t @var{duration} (@emph{input/output})
+When used as an input option (before @code{-i}), limit the @var{duration} of
+data read from an 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.

More information about the ffmpeg-devel mailing list