[MPlayer-users] Produce 422 format pixels with mencoder for mpeg4-encoding

[James Board]

> > Also, I plan on using mencoder and libx264 to produce MPEG-4
> > AVC files and 422-format pixels.  Can ffmpeg do  this?
 
> ffmpeg -i input.mp4 -vf
> scale="'if(gt(a,16/9),1280,-1)':'if(gt(a,16/9),-1,720)',pad=ceil(iw/16)*16:ceil(ih/16)*16:(ow-iw)/2:(oh-ih)/2:black"
> -f yuv4mpegpipe - | x264 --demuxer y4m --profile high422
> --preset slow
> --tune film -qp 0 --output-csp i422 -o output.mp4

I tried this and the error message was:
    x264 [error]: invalid argument  qp = p