MPEG4 (XVID) playback issues.

[stelford]

MPEG-4 updates the picture by chunks/blocks. It detects changes and tries to only update those. When your processor can't keep up with the updates, you tend to get what you displayed in your pictures.

If you can, try turning off the subtitles. In anime (especially) I have noticed that soft-coded subs (such as those in mpeg4/h264) cause all sorts of juddering and slow playback. Libass is not as "performant" as it could be, I guess.

My solution, until libass is sorted, is to convert the mpeg4's into divx's. The reason for this is, that the subtitle stream is then 'hard coded' into place, rather than inside another stream in the mkv/mp4/whatever.

The command I used on my linux machine to batch convert was; for files in *.mkv; do mencoder -o "${files%.mkv}.avi" -oac mp3lame -ovc xvid -ass -xvidencopts pass=1 "$files" &> "${files%.mkv}.translog"; done

Hopefully, I am wrong, but.. there is definitely something 'funky' with soft subtitles and the pi