I just recently upgraded my AVR to one that can handle the HD audio formats (Dolby TrueHD, DTS-MA, etc). After getting things pretty well setup, I set out to try some of my movies (most from HD-DVD, but some from bluray) specifically those that have some form of uncompressed audio.
The last couple of nights we watched the first two in the Harry Potter series. I have ripped them as MKV containing the original contents: VC-1 for video (24000/1001 fps), and Dolby TrueHD. I am bitstreaming the audio to a Yamaha RX-V867 through HDMI from Media Center (MyMovies).
One thing we noticed is that although the A/V sync starts out right, over time the video appears to be falling behind the audio. It gets more and more off as the movie plays along (and these are long movies). Hitting Replay (7-sec back) on the remote fixes the problem as does any other kind of seek (Stop/Resume, click on seekbar, skip forward 30-sec, etc.)
Although the workaround is easy (every 15-20 mins or so, skip back 7-sec), it is a bit annoying, so I thought I'd check in here and see if anyone had any suggestions:
Here is my setup:
- MKV created with MKVtoolnix (4.2.. VC-1 and TrueHD track extracted with HdBrStreamExtractor from HD-DVD disk. AnyDVDHD to do the dirty work.
- Running 32-bit Windows 7. Playback in Windows Media Center. Default video decoder (WMvideo decoder dmo is what shows in graphstudio).
- Haali is the MKV splitter. ffdshow tryouts using only the audio decoder to allow for audio pass thru to Yamaha (all codecs disabled on the video side).
- Hardware is DH67BL/Core i3-2100T.
- TV settings are set for 59.9x Hz, 1920x1080.
Other than Haali (for MKV) and ffdshow (for HD audio bitstream) it is pretty basic Win7 install.
I'm willing to try anything you might suggest. A few things I thought of:
- Try different splitter? Could it be a problem with Haali? I could try MPC-HC MKV splitter or there is a new one (SMM). Is it worth a try or should Haali work.
- Try a different video decoder? It seems strange I don't get hardware acceleration with VC-1 content, as Sandy Bridge is supposed to have support for it. I see MPC-HC has one, and maybe even it would do accelerated VC-1 (my experience so far is that Intel claims HD2k to do VC-1 hardware decode, but in practice my CPU is running 25% or so on VC-1 content in MKVs). There is also a new version of ffdshow claiming to use QuickSync for HW accel decode on Sandy Bridge. Has anyone tried any of these?
- Try a different video player. I may try VLC if I can get it to bitstream audio to my AVR.
Any other ideas?