Jan,

I can't answer your question but I can provide some information that may help.

I rip my original DVDs at 640*480, 500kbps, 25fps and 128bit audio - so I can watch them on a laptop without them looking too bad on the large screen.

The I used the menplayer settings from the Wiki to reduce the size, frame rate and audio quality so they play on my 770.

A 90 minute film (the two part Pilot to Firefly - Serenity) starts out at about 330meg and reduces to 230. A 40 minute episode goes from 190meg to about 110. These play OK on the 770, though there are some artefacts and from opening the file to playback start takes a while.

Compare to my iPaq 4700 this is quite weak - the iPaq will play the originals using TCMP with no problems. But then it is three time as fast on clock speed alone.