I am converting Hi-Res, 40MB, 40 second, 720 x 404, 25 fps, crystal clear MPEG-2 files to FLVs and keep getting sporadic (and somewhat random) mosaic patterns throughout the video -- not always associated with motion.

Conversion speed is absolutely fantastic (roughly 20 seconds vs. 50 minutes with Flash 8 Video encoder)...but the quality is not quite there.

Has anyone else experienced similar issues?