H.264 4096 x 2304 - GPU acceleration crashes Windows

[NikosD]

I use VLC 1.1.3 and I found out a problem with H.264 Level 5.1 support when I enable GPU acceleration

I have an ATI Radeon 5750 - Windows 7 x64 - Catalyst 10.7 system and when I try to play UHD (4096 x 2304 ) H.264 video files with GPU acceleration enabled, I get a crash or a black screen window.

These files certainly do not get a video acceleration.

ATI has declared even from Catalyst 10.4 the support of H.264 Level5.1 at 4096 x 2304.

Are you going to support it ?

The "usual" H.264 files at 1920 x 1080 have GPU acceleration.

Thanks

[Jean-Baptiste Kempf]

Provide some samples.

[NikosD]

Yes, of course

http://rapidshare.com/files/414985529/Y ... s.mp4.html

http://rapidshare.com/files/414984985/Y ... _.mp4.html

http://rapidshare.com/files/414984909/Y ... t.mp4.html

The files were taken by YouTube

You can find a lot more there

[VLC_help]

ATI has declared even from Catalyst 10.4 the support of H.264 Level5.1 at 4096 x 2304.

You have some link for that?

[NikosD]

Yes I have

http://blogs.amd.com/play/2010/04/28/at ... 0%99s-new/

[NikosD]

Edit: Update to Catalyst 10.8

Exactly the same behavior.

Blue screen/ crash with GPU acceleration enabled at UHD (4096 x 2304) H.264 clips

[Jean-Baptiste Kempf]

Well, I have to say, that I am not surprised. Although, I believe the driver is buggy.

[NikosD]

Could you be a little more specific ?

Why you are NOT surprised ?

Why do you think the driver is buggy ?

And of course last question.

Are you going to add this type of GPU acceleration in your next version?
I mean UHD support.

Is it a lot of trouble for you?

Because not all people have 4core processors to play these files in CPU only

[Jean-Baptiste Kempf]

Why you are NOT surprised ?

Why do you think the driver is buggy ?

1) Because those are very HD resolution
2) Blue screen means driver issue.

[VLC_help]

Because not all people have 4core processors to play these files in CPU only

VLC doesn't support multicore H.264 decoding.

[NikosD]

So from your answers, I do not see a big interest to implement it

[NikosD]

Because not all people have 4core processors to play these files in CPU only

VLC doesn't support multicore H.264 decoding.

I mean that for systems with older processors (single or multicore), GPU accelerating is a necessity and not a supplement in order to play those files.

[NikosD]

Why you are NOT surprised ?

Why do you think the driver is buggy ?

1) Because those are very HD resolution
2) Blue screen means driver issue.

1) They are UHD files, but according to ATI they ARE supported

I think it's up to video player developer to use the driver in a suitable way

2) Blue screen is NOT ALWAYS driver issue.

[Jean-Baptiste Kempf]

2) Blue screen is NOT ALWAYS driver issue.

They are.

[NikosD]

2) Blue screen is NOT ALWAYS driver issue.

They are.

Anyway, it would be better to argue about the support and not the blue screen of the feature

[Jean-Baptiste Kempf]

I have already reported the crash to ATI engineers.

[NikosD]

I have already reported the crash to ATI engineers.

Is there any chance besides the fix of crash, to add the support too

[VLC_help]

It is up to ATI to do that.

[NikosD]

Funny, because ATI says it is up to software developers to support it.

ATI claims that they did their job in Catalyst 10.4
They exposed the feature inside the driver and you have to use it.
And it goes on till now, Catalyst 10.8

No?

[Ludrax]

I have already reported the crash to ATI engineers.

so it is actually possible to contact them(related to other topics)

[Chancer]

GPU acceleration works with these videos on MPC-HC and ffdshow DXVA without problems. I believe it's VLC issue.

[VLC_help]

ATI claims that they did their job in Catalyst 10.4

VLC support was added in Catalyst 10.7

If drivers crash or cause BSOD it is ATI's fault. And it is drivers/hardware task to decode the video if DXVA is used, we cannot do anything.

[NikosD]

GPU acceleration works with these videos on MPC-HC and ffdshow DXVA without problems. I believe it's VLC issue.

With ATI cards the following programs give BSOD when try to play 4K videos in DXVA mode (GPU accelerated)

1) VLC
2) MPC-HC (Internal filter)
3) FFDshow DXVA
4) DivX H.264

Only PowerDVD 10, WMP12 and Splash Pro do nothing or play sound with Black screen, but do not crash

Do you have an Nvidia card ?

[Chancer]

No, ATI 4850.

[NikosD]

No, ATI 4850.

Can you give us details about your system/programs versions in order to repeat your test ?

Windows :
Catalyst :
MPC-HC:
FFDShow DXVA:

Settings of MPC-HC and FFDShow DXVA

Thanks