[FFmpeg-user] Order for Filters

Carl Eugen Hoyos cehoyos at ag.or.at
Thu Apr 14 15:21:41 CEST 2016

Nicholas Robbins <nickrobbins-at-yahoo.com <at> ffmpeg.org> writes:

> I have some MKV's from a DVD that are telecined and 
> letterboxed. I would normally use
> "-vf fieldmatch,decimate"
> however, I want to add a crop filter. Which order would be 
> better? Crop before fieldmatch or fieldmatch before crop?

While it generally doesn't matter and it would speed up the 
process to first crop, I wanted to suggest to do the cropping 
later so fieldmatch has more data to decide if a frame is 
But if the input is letterboxed, you should definitely crop 

Carl Eugen

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