Well, Studio 8 is well-known to be buggy and unstable.
Anyway, how did you capture the footage ? Did you capture it as MPEG-2 ? I mean, the ATI AIW cards have a hardware MPEG-2 encoder
AFAIK, and you can capture directly as MPEG-2.
What do you mean by "edit" ? Do you just wanna cut out and rearrange scenes, or do you want to add text and apply filters ?
For only cutting and rearranging, you'd better be off with the freeware
Cuttermaran. If you want to cut framewise, you can couple Cuttermaran with either
TMPGEnc or
Cuttyenc.
RJ