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 Video lags behind audio for 720p AVI, WMP; MPC-HC reboots 
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Joined: Fri Jan 22, 2010 7:12 pm
Posts: 9
Post Video lags behind audio for 720p AVI, WMP; MPC-HC reboots
I have a Fit-PC2 with freshly installed Windows XP, all latest updates applied (including SP3). I am using Windows Media Player (WMP) 11. I installed the latest version of the K-Line Codec Pack, which also installed Media Player Classic Home Cinema (MPC-HC). The Fit-PC2 is hooked up via HDMI/analog audio cable to a Sharp AQUOS TV, running at 1920x1080.

Playing a standard definition AVI file works smoothly in all three of WMP, MPC-HC, and even VLC, which I installed just in case, even though I've read on the forum that it does not support hardware acceleration on the Fit-PC2.

However, I have a 720p HD AVI file that I cannot get to play properly. When I open it with MPC-HC, there is an instant reboot (no blue screen, just a reboot). When I open it with WMP, the video plays back, but, the video lags the audio significantly; I think the video playback is slower than real-time, and the audio and video are not synchronized. When I open it with VLC, the audio and video are synchronized, but video playback exhibits a lot of stutter, with lots of skipped frames.

I even tried buying and installing the Cyberlink HD264 Pack for WMP (http://www.cyberlink.com/store/hd-264-p ... en_US.html), however, this did not change the behavior of any of the three video players I am using. (And when WMP is showing the video, I still see ffdshow system tray icons pop up, so I suspect WMP is not even using that codec pack.)

I am not an expert on video codecs, but I just want to get 720p HD video playback working. Does anybody have any hints about how to do that? Thanks!


Sun Jan 24, 2010 8:18 pm
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Joined: Mon Mar 16, 2009 2:11 pm
Posts: 2333
Post Re: Video lags behind audio for 720p AVI, WMP; MPC-HC reboots
To play-back 720p you must take advantage of GMA500 HW acceleration - that you haven't so far.
We are offering OEM version of CyberLink PowerDVD SE codecs with fit-PC2 XP HD. These codecs are not available in retail.
Your options are
- Obtain PowerDVD 9 or later which has the GMA500 codecs
- Install Windows 7 which does include HW DXVA HW acceleration (currently not as good as the one under XP).

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Irad Stavi
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Mon Jan 25, 2010 8:32 am
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Joined: Fri Jan 22, 2010 7:12 pm
Posts: 9
Post Re: Video lags behind audio for 720p AVI, WMP; MPC-HC reboots
Thanks for the quick and clear reply! I will try purchasing PowerDVD next.

I misunderstood this post: viewtopic.php?f=36&t=1128

You advise there to install MPC-HC and the K-Lite codec pack, and mention not to use VLC because it does not support hardware acceleration; I misinterpreted this to mean that the alternatives (K-Lite plus MPC-HC or WMP11) did support hardware acceleration. Playing non-HD video files seems to work okay using any of VLC, MPC-HC, or WMP; can you clarify what MPC-HC and the K-Lite codec pack enables, that VLC or standard WMP without K-Lite can't do?

Also, I echo the question here: viewtopic.php?f=40&t=1133

Does it matter what edition of PowerDVD 9 I purchase?

Also, will I be required to play videos in PowerDVD directly, or does installing PowerDVD install a shared codec that I can use from WMP?

Thanks again for your help!


Mon Jan 25, 2010 5:36 pm
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Joined: Mon Mar 16, 2009 2:11 pm
Posts: 2333
Post Re: Video lags behind audio for 720p AVI, WMP; MPC-HC reboots
Quote:
can you clarify what MPC-HC and the K-Lite codec pack enables, that VLC or standard WMP without K-Lite can't do?


MPC-HC is using DXVA and the k-lite filters. WMP does not have these filters (eg mkv splitter). VLC uses its own filters not having DXVA support.
DXVA is required for HW video acceleration in Windows.

Quote:
Does it matter what edition of PowerDVD 9 I purchase?

Also, will I be required to play videos in PowerDVD directly, or does installing PowerDVD install a shared codec that I can use from WMP?


I'm sorry, I don't know, since we are using a specific set of CyberLink codecs. Maybe other users can help more. Check that the version has GMA500 support.

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Irad Stavi
fit-PC forum admin

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Tue Jan 26, 2010 2:02 pm
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Joined: Fri Jan 22, 2010 7:12 pm
Posts: 9
Post Re: Video lags behind audio for 720p AVI, WMP; MPC-HC reboots
Thanks for the information.

Unfortunately, the PowerDVD9 site is a little bit confusing to navigate, and it was unclear to me which version of PowerDVD9 had GMA500 support; but, from the copy there, it seemed like it was either all, or none, and I was guessing the former.

I paid for and downloaded PowerDVD9 Deluxe (the middle option, between Standard and Ultimate), which lists for $69.95 but, with a coupon code (I think searching for a coupon code almost always will find you a small discount, this month's is JANOFFER for 10% off), came out to $62.

I am happy to report that playing my 720p HD AVI in PowerDVD9 works! The audio and video are synchronized, and, the playback is pretty smooth. The initial disk seek time is a little slow, and there is a very occasional stutter, but it was barely noticeable.

One remaining problem is that if I pause and unpause the video, the audio and video can get slightly out of sync. This doesn't always happen, and I haven't experimented enough to be more specific about how often, or whether I can work around it.


Tue Jan 26, 2010 5:02 pm
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