[FFmpeg-user] Questions about w3fdif deinterlacing

Carl Eugen Hoyos cehoyos at ag.or.at
Fri Jan 17 16:40:46 CET 2014

csparker247 <csparker247 <at> gmail.com> writes:

> >(There is no magic in idet that makes the command work. 
> >I suspect it is easy to implement the "magic" somehow 
> >but I doubt it would work well: "Undetermined" frames 
> >are not unusual.)
> I understand this makes no sense, but including idet in 
> the filters changes the output and removes the skipping.

> I can't figure out why.

The reason is that I was wrong;-)

The filter "works" exactly as you expected because the 
"magic" is there, and for the sample you provided, it 
works perfectly: All frames are correctly identified.

Note that there are many streams for which the detection 
will not work so nice.

Carl Eugen

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