Choppy playback, out of sync video

[Zedd]

I recently purchased WinDVD 9 Plus Blu-Ray, as it seemed the best choice to go with my new LG Blu-Ray/HD-DVD drive. Unfortunately, I seem to be unable to play Blu-Ray movies properly.

First, the only way it'll play at all is if I start WinDVD as an Administrator. If I start it normally, it begins loading the disc, gets to the point where it would normally start playing, then locks up. Sometimes just the UI and video will lock up, and the audio will play.

Anyway, starting it as admin seems to work, so that's fine. The problem is, once it starts playing the actual movie (the menus and previews are usually fine), the video is choppy and jerky, and lags behind the audio significantly.

I've seen these symptoms before, and they usually, as far as I know, indicate that the computer isn't fast enough to decode and play the video in real-time.

However, my system stats are well above the minimum requirements, so I don't understand how that could be.

Stats:
AMD Athlon 64 X2 4200+
768MB GeForce 8800GTX (factory overclocked)
Creative Audigy 4
2 GB DDR-RAM
Windows Vista Home Premium (32-bit)

I've already made sure I'm running the latest video driver from nVidia, and I have the latest update for DirectX installed (March 2008).

Is there anything else I can check, or any reason why my computer would be unable to play Blu-Ray movies properly? I've tested 3 different movies, with the same result. And according to the options in WinDVD, nVidia PureVideo HD (I think that's what it's called) is enabled, which should mean my video card is doing the video decoding in hardware, shouldn't it? I would think an 8800GTX would be plenty fast enough to do so.

Any help or advice you could give would be greatly appreciated.

[Ron P.]

I'm by far no expert on this, however from what I've read, even though you have a video card that should playback smoothly, your system is lacking. Most are using at least a Duo-core or Dual Core set up, if not a Quad core.

It takes a very powerful PC to smoothly playback HD or Blu-Ray videos.

[Zedd]

My processor is dual-core (that's what the X2 means). And it's well above the minimum requirements, in fact if I remember correctly, my exact CPU is even listed as one of the examples under the "Recommended" column of WinDVD's system requirements for playing back HD discs...

[tobias]

Is there anything else I can check, or any reason why my computer would be unable to play Blu-Ray movies properly? I've tested 3 different movies, with the same result. And according to the options in WinDVD, nVidia PureVideo HD (I think that's what it's called) is enabled, which should mean my video card is doing the video decoding in hardware, shouldn't it? I would think an 8800GTX would be plenty fast enough to do so.
.

I've had the exact same problem with windvd bluray 9 and surprise surprise - I also have a latest generation nvidia graphics card installed with pure video HD etc and I am running on a quad core E6600.
I've tried every directX / enable /disable accelerator bla bla option - my monitor, PC and graphics card are all HDCP compliant

Conclusion ? - WinDVD9 plus blu ray is incompatible with mid-high end nvidia graphics cards of the latest generation and until they get their heads together with nvidia and apply a fix either to nvidia drivers or the windvd program - you won't be able to play anything.

I don't think my graphics card is as powerful as yours but I have the GT 9600 - only released a few weeks ago and it is most definitely not compatible with windvd - not even compatible with windvd 8 ( which i had also bought ) which also refuses to play even normal dvds now after a year of problem free use. - I now get nothing but jerky choppy 1 frame only stuttering shots every 4 seconds.

What does work flawlessly with blu ray -hd dvd playback is Nero Showtime - as smooth as silk on my system.

We'll have to wait for a fix ( hopefully ) - don't bother writing to Corel tech support - as everyone on here knows from the admin down - they are an absolute joke and waste of space.