[FFmpeg-user] Use cropdetect only every xth frame

[Carl Eugen Hoyos]

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

> > Complete, uncut console output missing.
> $ 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>&1 | wc -l
> 9939
> 
> Very much ;). See http://pastebin.kde.org/phwvakpgq for 
> the complete output or shall I include it in the mail?

Definitely.
It is of course ok to trim the output. The problem is that 
at least the first 50 and the last 50 lines are needed, 
and that is what nearly everybody cuts, so I have to ask 
for "complete, uncut output" (but the "concealing" lines 
are of course less important if some of them are still 
visible.

Consider testing again without the filters, I cannot 
rule out that the filters take longer than the decoding.

After a quick look, I fear that a sample will be needed;-(

While this is probably not the reason for your problem, 
you should really fix your configure line, or is that 
what Gentoo produces? It honestly looks broken...

Carl Eugen