When i export my final video in quicktime Uncompressed 8-bit, and burn it in iDVD, and i playback to check it, the video begin and run great, but in random parts of variuos copies, the video stretch and begin to show the fields at end of the playback. I think that must be a compression problem, but I always follow this steps and never gave me this problem. I burn other exported video in my dard disk and don't gave me problems. If somebody have an idea, please replay this post.