[MPlayer-users] mencoder, libavcodec, high-motion scenes jerky

[Grigori Goronzy]

> Original material is MPEG2, 480x480, 5100 seconds. I'm cropping out
> the black bars from top and bottom and a few pixels from left and
> right. While the overall quality is great (would B-frames help more?)
> and filesize matching (I was aiming at 686MB, got 692MB) is almost
> perfect, the high motion scenes look jerky. I'm sure there's some
> parameter I haven't thought of that could help when tweaked. The
> question is, which one? vme, vqcomp, vqdiff? As you have probably
> noticed, I'm changing FPS to 24 (original is 29.976), is that an
> issue? Have I done something wrong?
> 

I'd increase the keyframe value, to something high, 300 frames or so..
and maybe increasing the vqdiff value helps.
of course you should also add the vhq - flag; v4mv might also help.

I wouldn't recommend b-frames, I got bad results in high-motion scenes
with them.

greg