[MEncoder-users] Huffyuv/ffvhuff artifacts

[Eric Wescott]

I'm currently using mplayer/mencoder SVN build 33766 (2011-06-28) and 
the same date build on ffmpeg. I've tried many other builds over the 
past year or so and have the same result.

You can obtain the two source clips I use to demo the issue here

https://pantherfile.uwm.edu/wescott/public/Tape047-0115.m2t
https://pantherfile.uwm.edu/wescott/public/Tape047-0116.m2t

Basically, I have a ton (70hours or so) of footage I'm using mencoder to 
perform a inverse telecine on. Then I'm taking this footage and 
transcoding to ProRes 422HQ for optimal performance in my NLE and 
composting software.

Anyway, here is the method I've used
FFVHuffy:
mencoder Tape047-0115.m2t  -fps 30000/1001 -vf 
pullup,softskip,harddup,scale=1920:1080 -ofps 24000/1001 -ovc lavc 
-lavcopts vcodec=ffvhuff:aspect=16/9 -demuxer lavf -oac pcm -o 
Tape047-0115-FFVHUFF.avi

Huffyuv:
mencoder Tape047-0115.m2t  -fps 30000/1001 -vf 
pullup,softskip,harddup,scale=1920:1080 -ofps 24000/1001 -ovc lavc 
-lavcopts vcodec=huffyuv:pred=2:format=422P:vstrict=-1 -demuxer lavf 
-oac pcm -o Tape047-0115-HUFFYUV.avi


Most of the files appear to be correct but maybe 5-10% of them have 
strange noise issues. The links above are two such examples. The strange 
thing is sometimes both produce the noise and sometimes it's just one or 
the other. Any idea what's causing this issue and how I can resolve it?

Thanks
Eric Wescott