Blu Ray rip audio out of sync

[Robmoo]

I'm not sure if this is the correct forum. Moderator, if this isn't the correct forum please move the post to where it belongs.

I'm backing up my Blu-Ray disks. I use Anydvd. Then I use TSmuxer to demux the video and audio plus reduce the true dts to ac3. Then I use Megui to transcode the video at 10k kbps to mp4. I then remux them into a mkv file using Megui's Adaptive Muxer. When I play back the video using XMBC on my transcoding computer the audio is out of sync only when I fast forward or reverse. The audio is back in sync within a few seconds. When I play the files on XBMC on my HTPC the audio goes in and out of sync through out the movie.

I have no issue actually playing a Blur Ray disk or the MT2s file.

I appreciate any help I can get. My only thought is that the cpu load is higher decoding the more heavily encoded files. I oc'd the cpu a Brisbane BE 2450 to 2.8ghz and the problem seemed a bit better. I hope I don't have to buy a PhenomII to get these files to play!

Thanks,

Rob

[Inspector.Gadget]

Sounds like an XBMC problem.

[Robmoo]

I experience similar problems with MPC Home Cinema. Lowering the video bit rate helps. I'm not sure why the ripped video takes more cpu power to play. Anyone know if futher compressing the video increases the cpu load during play?

[dat720]

I also experience similar problems with the PS3 in the bedroom and high bitrate M2TS's, on my setup i beleave it's more to do with the optical audio because it didn't happen before i connected it to a set of Logitech X5500's.

The same videos play fine on my MythTV box in the lounge room.

[Robmoo]

I've found the problem. I was encoding the movie at a constant bitrate. Something about this encoding process prevented the GPU from assisting with decoding the movie. I switch my encoding process to the Constant Quality settings and the CPU usage dropped dramatically and the movies play back just fine.