[FFmpeg-user] Starting to copy takes long

James Darnley james.darnley at gmail.com
Wed Mar 29 03:32:20 EEST 2017

On 2017-03-29 02:04, Cley Faye wrote:
> 2017-03-29 1:54 GMT+02:00 Cecil Westerhof <Cecil at 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?
> ‚ÄčTry 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.

Furthermore ffmpeg is not copying anything there.  You did not tell
ffmpeg to copy.  It is encoding with (probably rubbish) defaults.

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