2017-03-29 1:54 GMT+02:00 Cecil Westerhof <ce...@decebal.nl>:

> I want to copy a little bit of a video. I do this with:
>     ffmpeg -i input.mov -ss 16:28 -t 5 output.mov
>
> But it takes about 2:20 before the copying starts. Is this normal?
>

​Try moving the -ss part before your input. -ss before an input use forward
(if possible fast forward) on your source, while before an output it means
processing everything before, then start using the output after the given
time.
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