Just wanted some opinions & advice on the best video container/codec to use for cutting a film.

I have a film in RM (sometimes RMVB). There is a huge lack of freeware editing tools for RM(VB) files. So I use SUPER to convert RM(VB) to something else, eg. AVI(Divx/Xvid), or MPEG2, etc. because there's loads of free cutting tools for MPEG2 & AVI (I think).

I tried a little MPEG2 conversion. While it's converting I copy the output file and play it to see if it's not garbled. It looks okay, but the frame rate is too high/fast... while the sound plays normal speed -- hence out-of-sync. So I try AVI(Xvid). The output sample I taken plays fine.

Probably the best container/codec is MPEG2 for best quality .... and there's good cutting tools. But I doubt I can get SUPER working properly.

SUPER can do many other file formats. So my question is, besides MPEG2, what is the best output container/codec for cutting? ... interms of keeping quality/sound, etc.