WinXP and TNT => aliasing on Video playback(overlay)

[Ksnif]

Hello everyone. I have a Diamond Viper 550 (nVidia TNT) on an ABIT KT7. I use WinXP Pro and tried all the new Detonator XP drivers I could found(21.81,21.83,22.40,22.50,22.80)
There is always the same problem. Video playback of any format has a notisable aliasing problem. I never had this problem before with Win9x and any drivers (even Detonator XP).
Please, has anyone else met with this problem before. I would like to find a solution to this annoying problem.

 

[Ksnif]

...anyone...don't be shy!

 

[Ksnif]

...is anybody out there how has a TNT on his/her system?...

 

[vss1980]

Try raising the resolution. This was the only way I could get rid of the problem with the TNT2.

 

[Ksnif]

So it is a common issue for TNT based cards...It's true that in 1600x1200 the phenomenon appears less distractive. Thanks for the solution. I hope though that there is going to be a complite fix of this problem (driver release or help from a tweaking software)

 

[vss1980]

I think its more down to nvidia's DirectDraw/Show driver being geared a bit too much towards performance than quality than an inherent problem with the TNT based cards.
For example, some DVD playback programs work better than others at producing a smooth curve in a picture compared to another and it is basically down to how well it is processing the video and how much CPU time it spends doing it.

 

[Ksnif]

I agree with you. The new Detonators have many optimizations for the new GPUs. Some of these optimizations result in pure quality/performance for the old GPU line (TNT/TNT2). I guess maybe the whole idea of having unified drivers isn't such a good idea after all.
Recently I've tried the 12.41 detonators (that can be found on nVidia's site), which have been released with a Win2K/XP support. They are the best I've ever tested (on XP) for my TNT. Some performance boost both in Windows-GUI and DirectX/OpenGL. Unfortunately our disgust problem is still here. Maybe if they release a more previous version, supporting XP (like 3.68 for instance, which I think are the best for TNT), we could find our match.

 

[Haden]

I'm not sure do you experience same problem as I did on my TNT2 ultra.
I got random white points while watching video files (say 10-15 pixels, randomly changing their position). The only way to solve this problem was disable everything related to YUV (surfaces, overlays etc.)
White points wanished and I didn't any lost performance.

 

[Haden]

I'm not sure do you experience same problem as I did on my TNT2 ultra.
I got random white points while watching video files (say 10-15 pixels, randomly changing their position). The only way to solve this problem was disable everything related to YUV (surfaces, overlays etc.)
White points wanished and I didn't any lost performance.

 

[Ksnif]

No I haven't. I would like trying to disable YUV on playback, but as far as I know there is no way to do it on WinXP. I could do that on Win9x (Windows media player's option menu), but then I didn't have any problems on Win9x.
I've done some test lately and came to the conclusion that there is no hardware acceleration at all (or if there is, it's very crappy). By raising my desktop resolution, there is a noticeable performance loss. I remember that this issue didn't take place on Win9x. So I guess that must be the reason why I have that aliasing problem.

PS: Is there a way to contact nVidia? I would like to inform them about this problem.

 

[Haden]

Yes for some reason all options are removed from 6.4 media player. I'm forced to use WM 8.0 (I hate that thing ), it still has YUV controls
Tools->Options->Performance->Advanced... Maybe disabling/enablig YUV or something else can help you out.

Sorry about double message.

 

[Ksnif]

While being at work (and the problem occurs on my rig at home) I?ll test that lately this afternoon.
I?ve done some test and found something peculiar going on with my TNT?s overlay. Having desktop resolution set to 1024x768 each application that uses overlay works just fine. But there is that aliasing problem. Raising resolution at 1152x864 the aliasing disappears, BUT application such as MicroDVD, DVD2AVI, FlaskMPEG, XMPEG and many others, report no overlay support! Isn?t that weird? Somehow there is no hardware overlay support on resolution higher than 1024x768. So by using something like ?software overlay? there is a better quality but a significant performance loss. The final conclusion is that TNT?s hardware overlay is very crappy (well on XP actually).