AV1 DXVA2 decoding broken 27.20.100.9033

[MSchm21]

This is tested on Iris Xe (i7-1165G7)

27.20.100.9033/27.20.100.9039/27.20.100.9077: https://imgur.com/a/9WsABGA

27.20.100.8935: https://imgur.com/a/Rx7EsRe

AV1 Decoding via DXVA2 is broken in newest driver, the last working is build 8935.

[MSchm21]

I meant 27.20.100.9030, not important though...all of the current 90xx drivers are affected.

[Alberto_Sykes]

MSchm21, Thank you for posting in the Intel® Communities Support.

Thank you very much for letting us know that information as well. For this scenario, we will do further research on this matter, as soon as I get any updates I will post all the details on this thread.

Any questions, please let me know.

Regards,

Albert R.

Intel Customer Support Technician

A Contingent Worker at Intel

[Alberto_Sykes]

Hello MSchm21, I just received an update on this matter.

Just to let you know, we are already investigating some bugs on AV1 decoding with the latest drivers, but just to be sure, we need for you to please provide the detailed steps you followed for us to try to reproduce the issue that you are seeing. Once you get the chance please provide that information.

Regards,

Albert R.

Intel Customer Support Technician

A Contingent Worker at Intel

[MSchm21]

Ok here the steps

1. Download MPC-HC 1.9.8.92: https://github.com/clsid2/mpc-hc/releases

2. Download Summer Nature 3840x2160 AV1: https://www.elecard.com/videos

3. Open MPC-HC, go to options, click internal filters, click video decoder and choose Hardware Decoder DXVA2: https://imgur.com/a/UaNjvU7

...and then open the downloaded AV1 or any other AV1.

If your MPC-HC version is too old you have to install the newest LAV Filter manually and use external filter in MPC-HC: https://files.1f0.de/lavf/nightly/

I found that the D3D11 hardware decoder runs faster than DXV2 for AV1 videos which is possibly expected.

 

[Alberto_Sykes]

MSchm21, Thank you very much for providing that information.

We will now continue with our research on this topic and we will try to replicate the issue, as soon as I get any results I will post all the updates on this thread.

Regards,

Albert R.

Intel Customer Support Technician

A Contingent Worker at Intel

[Alberto_Sykes]

Hello MSchm21, I just received an update on this matter.

After reviewing the case, we can confirm that DirectX* 9 support for AV1 decoding has been disabled in the latest drivers since Intel® is on its way to deprecate native DirectX 9 support. AV1 decoding with DirectX 11 continues working as expected.

Regards,

Albert R.

Intel Customer Support Technician

[MSchm21]

My reported DXVA2 AV1 issue has been fixed in driver 9168. Do you mean DXVA2 with DX9?

[Alberto_Sykes]

MSchm21, Thank you very much for letting us know those details.

"My reported DXVA2 AV1 issue has been fixed in driver 9168", perfect excellent, it is great to hear that the DXVA2 AV1 issue is now fixed after installing driver version 9168.

In reference to "Do you mean DXVA2 with DX9?", just to make sure, what is it that you are trying to confirm? Could you please explain?

Regards,

Albert R.

Intel Customer Support Technician

[Alberto_Sykes]

Hello MSchm21, I just wanted to check if you saw the information posted previously and if you need further assistance on this matter?

Regards,

Albert R.

Intel Customer Support Technician

[Alberto_Sykes]

Hello MSchm21, Since I have not heard back from you, we are closing the case, but if you have any additional questions, please post them on a new thread so we can further assist you with this matter.

Regards,

Albert R.

Intel Customer Support Technician