I tried ripping National Treasure 2 to h.264/mp3 avi but it still had the audio sync problem and it processed at 35% the usual rate…painfully slow…with no visible quality improvement although I acknowledge h.264 has advantages. I wonder if you have access to this DVD and have the same problem when ripping to either output format?
Per the second bit of your post I’m not clear what “…device or PC player software” you refer to…DVDFab device says “generic” and I think my default DVD decoder was installed with my ATI software. I prefer Nero Showtime for viewing DVD content but I’ll also watch them using Windows Media Player v11.
Using the same HDD source I’m ripping from, I can view the DVD in either Nero or WMP and there’s no audio problem and I can also rip it to divx/mp3 avi using Magic DVD Ripper without problem so I don’t think it’s a problem on the DVD decoding end. The problem appears to be fixed in either DVDFab or the embedded xvid codec…or, I suppose, some security feature that Magic DVD gets around but DVDFab does not although I find that hard to believe since my Magic DVD is an older version supplanted by DVDFab.