I converted a TV show to the medium N810 settings (480x360) and played it back on my 2007 N800 (Mplayer v1.0rc1-maemo.24) and I really couldn't believe how well it played. Hardly any stuttering at all (in my experience, everything on the N800 stutters).

I tried a preview of the 560x336 setting, but the stuttering became a little more apparent.

I did use the Xvid encoder for both tries, mainly because that was the format of the original file, so I'll try a DivX5 pass later on.

One question: Would Mplayer support a resolution of 512x384 (that's in 4:3 aspect ratio)? I have quite a lot of material in that resolution (it's what my Archos PMA430 records in) and it would be nice to be able to keep it. I realize the pixel count is a bit higher than the medium setting, but it is lower than the high quality.