[FFmpeg-user] [N-46469-gc995644] "Invalid duration specification for t: 00:60:00"?

Gilles codecomplete at free.fr
Mon Jan 14 17:09:29 CET 2013

On Mon, 14 Jan 2013 15:35:57 +0000 (UTC), Carl Eugen Hoyos
<cehoyos at ag.or.at> wrote:

>> [C:\]ffmpeg -i input.mp4 -ss 00:59:50 -c:v copy -c:a copy FL.2.mp4
>Assuming your question is why the output file is not 
>shorter than the input file:
>If you put -ss time after -i, it means "decode the input until 
>(exactly) time, then start encoding", since -codec copy does 
>not do any encoding, the parameter is ignored.

No, the problem I have with the second file is that there's no sound
when it's played in VLC, while the first file plays fine.

Maybe I'm just not using the right parameters:

ffmpeg -i input.mp4 -ss 00:00:00 -t 01:00:00 -c:v copy -c:a copy

ffmpeg -i input.mp4 -ss 00:59:50 -c:v copy -c:a copy FL.2.mp4

The file is 1h38mn, and I assume that when not using "-t", ffmpeg will
read until the end of the file.

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