[FFmpeg-user] Confusion about fieldmatch, decimate and framerate

Carl Eugen Hoyos cehoyos at ag.or.at
Thu Nov 7 15:10:10 CET 2013

Nicholas Robbins <nickrobbins <at> yahoo.com> writes:

> Uploaded to upload.ffmpeg.org/incoming as sample-robbins.mkv

The sample claims to be 60fps while it actually is 30fps.
Assuming you produced the mkv file from a MPEG original:
Is the problem also reproducible with the original mpeg 

The following work fine here:
$ ffmpeg -i sample-robbins.mkv 
-vf fps=30000/1001,fieldmatch,decimate -qscale 2 out.avi

$ ffmpeg -i sample-robbins.mkv -vf pullup 
-r 24000/1001 -qscale 2 out2.avi

pullup is much faster but older and probably does not 
fix all frames (this is what the console output 
suggests here and what is expected).

Carl Eugen

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