clipping selected portions of a video

[Stephen Dixon]

You’ll probably want to look at a shell script for that.

What environment are you in? In a bash shell (eg on a linux or OSX machine) you might want to use a “for” loop like:

for (( i=0; i<3600; i+=180 ))
do ffmpeg -ss $i -t 10 -acodec copy -vcodec copy -i input.mov output_$i.mov
done

That will make separate movies however. You would have to use ffmpeg to join them all together if you wanted one movie as per this page.

[Peter Robertson]

Thanks!

That works like a charm. One more question. I’m trying to make my output files smaller–currently they are 1280 x 720 and I’d like to make them say 850 x 478. I don’t understand where to set that variable?

Pedro

Pedro

[Peter Robertson]

This one i figured out by using the scale filter i.e.

vf scale=800:450

Thanks.

Pedro

Pedro