[FFmpeg-user] Use cropdetect only every xth frame

[Carl Eugen Hoyos]

Gerion Entrup <gerion.entrup <at> t-online.de> writes:

> > You can use -skip_frame (see the documentation).
>
> Does not change that much:

Depending on your use-case, this is impossible.
(It of course cannot help for intra-only codecs)

> $ time ffmpeg -skip_frame nokey -i test.mp4 -filter:v 
> select='not(mod(n\,10))',cropdetect 
> -filter:a volumedetect -map 0 -f null 
> /dev/null 2>/dev/null

Complete, uncut console output missing.

Carl Eugen