nabocorp softwares

when i want convert a quick time video (from konica-minolta camera) i have sound but no video. no depending from codecs ( i tried many combinations)
if i try a second time (that means i overwrite the previous file) i got a error message "error during transcoding.."
of course if convert with a external progarm like "rad video tools" everything work fine
so i like cam2pc this the best tool for capturing and managing pictures but this is a pity to not have a video convert tool ok
thanks