[FFmpeg-user] Order for Filters

[Carl Eugen Hoyos]

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 
interlaced.
But if the input is letterboxed, you should definitely crop 
first.

Carl Eugen