I have encoded some divx movies to dvd mpeg2 and burnt to dvd r. Some are ok but others have some blocky glitches right through the film, and audio that is slightly out of sync.

I am burning onto bulkpaq dvd r, which are cheap. About £0.89 or $1.29 each.

When I watch the encoded file on my pc before I have authored the dvd, it seem to have no problems with it. So could it be the media or an error when authoring / burning?