[FFmpeg-user] Starting to copy takes long

[James Darnley]

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?
>>
> 
> ​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.

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


-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 603 bytes
Desc: OpenPGP digital signature
URL: <http://ffmpeg.org/pipermail/ffmpeg-user/attachments/20170329/b071cbe1/attachment.sig>