[ATI] - WARNING: pixelation/corruption on h264 channels.

I feel it's important to let any possible future ATI customers know about this very annoying issue.

I've been bugged by this for over half a year.
The problem has by ATI been know for almost a year.

The problem is...
Most HTPC users would probably want to use gpu hardware h264 acceleration (aka dxva) on those TV channels supporting it (h264).

Sadly it doesn't work for several european channels-
The result is major pixelation and an entirely corrupted image when using dxva on an ATI card.

eg.
DR HD (denmark: dvb-t h264@1280x720)
http://install.team-mediaportal.com/ts/The_Gift_-_DR_HD_-_2009-12-23.ts
http://install.team-mediaportal.com/ts/Anamorph_-_DR_HD_-_2009-11-01.ts


The problem is evident on windows7, possible vista too.
It happens on any mediaplayback application utilizing directshow and a dxva enabled h264 codec.
In other words it happens on: mce, mediaportal, bsplayer etc etc.

It's important to state that it happens on any h264 dxva capable that I know of:
eg.
win7 codec
powerdvd
etc.

Apparently AMD/ATI refuses to fix this well known issue.
They claim it's microsoft problem solely.

A well known fix is to use a nvidia card instead. This works perfectly. eg. a gt220.
Or you could disable dxva too and instead listen to a noisier CPU fan and crappier video deinterlacing and so forth.

Atleast I now know where I will place my hard earned cash the next time I opt for a new gfx card.

several links about the issue:

AMD Game Forums - Danish DVB-T HDTV is still broken.
AMD/ATi UVD with bad H.264 error concealment? [UPDATED] - CiNcH's DVB & HTPC Blog
BBC HD corrupts rhythmically after 30 secs - The Green Button
Celebrating Windows 7 | Nigel Dessau



danish
Pixelering på DR HD - recordere.dk forum - Side 27

be aware:
the moderator at amd.com seems all too eager to close any threads posted about this issue.
At least this one is safe

/gibman

 

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Re: AW: WARNING: pixelation/corruption on h264 channels.

I cannot agree more: the answer given from the moderator is too simplicistic and is a try to hide the real problem.
Going to post in MS forum as well so at least they know the way ATI answers.

Gibman, for pushing ATI for a fix.

Simone

 

Hi

i have a 4550 card that i bought specifically because it was touted as having hardware acceleration for HD content and that it was fanless and therefor perfect for a mediacenter PC.

I too am stunned that the ignorant moderator at that forum just closed a thread where costumers were expressing real reproduceable problems.

I for one can only warn people strongly about getting ATI cards for their HTPC's and i hereby wow that i will NEVER buy another AMD / ATI product.

A company THIS careless about the costumers problems in regards to real problems does not deserve to have my money (Or anyone else's for that matter)..

Nvidia (+intel) all the way for me in the future.

mce_user

chemelli

Post link to thread at MS and we will back you up there

mce_user

 

users of mediaportal that own ati cards should bomb amd forums with thousands of post.what they would then???they will take it more serius...

 

Here it is: ATI pixelation/corruption on h264 channels
(you need a windows live id to access those forums)

Simone

 

How about a news entry/blog post about this on the homepage? Would certainly reach more people and maybe put a little pressure on AMD (probably not though ).

 

I have a Live id for msn messenger but it seems that i am not allowed into that sub-forum anyways.

mce_user

 

In the same post I would propose to add some info about the flickering GUI. No help has been received from the ATI/AMD support. Unless you are willing to accept the fact that telling to MediaPortal developer (support was aware of the position, at least it was told) to use some different software is considered as a such

It is not that there aren't any troubles with Intel / Nvidia HW or drivers in the HTPC enviroment... for example Intel ignores quite well the 24Hz issues:

http://www.avsforum.com/avs-vb/showthread.php?t=1241833

Response from a not so technical Intel support person


All in all... I think all GPU manufactureres have nice products (with still some desing flaws or limitations or crappy drivers ), but their support and understanding of the HTPC area is almost non exsistent where as their marketing deparments bash their mouths how good their GPUs are for HTPC environments.

btw. I haven't still received a single sample GPU from HW companies, so they are not managed to corrupt my objective view on the fact that all GPUs are faulty on someway