Bug report: regression; Intel HD 620 and 630 fail to decode WebM VP9 with 4.4.4 chroma subsampling

[TWJ]

Use any browser that supports hardware accelerated video rendering. We tested in Vivaldi, Chrome and Firefox.

Load a video that uses WebM with the VP9 codec, with chroma subsampling set to 4.4.4.

If you have an Intel 620 or 630 GPU chip, it will fail to render correctly, and instead comes out as a grey patchy image. The same video works correctly on the Intel 520 GPU.

We tested on 5 separate computers using these graphics chips, and tested with a variety of driver versions. The driver versions didn't make any difference.

When the video was created with 4.2.0 chroma subsampling, it worked correctly in all cases, so the bug seems to be related to the use of 4.4.4.

Test videos created using libvpx-vp9 on FFMpeg.

Attached the video that shows the problem, and the DxDiag output from a computer where the problem could be seen.

[idata]

Hello tarquinwj,

Thank you for joining the Intel Community Support.I would like to replicate the issue. I will get back to you soon.Wanner G.

[idata]

Hello tarquinwj,

I am sorry for the delay. I am still working on replicating this issue.Wanner G.

[idata]

Hello tarquinwj,

I am sorry for the delay. I already reproduced the issue reported when using systems with Intel® HD graphics 520, Intel® HD graphics 620, Intel® HD graphics 630, and Intel® Iris™ Plus Graphics 650 and the environment described at the beginning. The video is not rendered correctly and the grey patchy image also showed up when using Intel® HD graphics 620 and Intel® Iris™ Plus Graphics 650. It does not happen when a system with Intel® HD graphics 520. I will forward this information to the proper department. We will investigate this issue further in order to provide a detailed answer about it. Thank you for your feedback.Wanner G.

[idata]

Hello tarquinwj,

To continue investigating on the bug report, please attach the following reports to have as much information as we can about the system you are using.1.Issue report:1. Right click on the Desktop, and click on Graphics Properties.2. Click Options and Support, and then click Information Center.3. Click on Save (save it in your desktop).4. Attach the report.Also, please fill out the following information and attach the missing reports. I can see that you already attached a DxDiag report.https://communities.intel.com/thread/77761 https://communities.intel.com/thread/77761Wanner G.

[idata]

Hello tarquinwj,

I would like to get more information about your system to forward it to the proper department. Please let me know if you need any further assistance. Wanner G.

[TWJ]

As stated previously, it was not my system. It was multiple systems used by the company. None of them are mine. I do not have direct access to the systems to get information about them. I attached all the information I could get to the initial report - see above. Since you have already reproduced the problem, you don't need any more information from me. You can just attach your own system information, and send it to the correct department. Really, you just need to get someone to fix the bug, assuming it is not fixed already (I don't have a system to test on now, so possibly it has been fixed already...).

[idata]

Hello tarquinwj

Thank you for the information. I would like to share with you that there have been several releases of drivers for the Intel® HD graphics 520, 620, 630, since you have reported this problem; if it is possible for you to test it you can download the diver on the following link https://downloadcenter.intel.com/download/27988/Intel-Graphics-Driver-for-Windows-10?product=96551 https://downloadcenter.intel.com/download/27988/Intel-Graphics-Driver-for-Windows-10?product=96551 (use .zip), if you have to install it on third-party products (DELL™, Lenovo™, ASUS* or others) this driver would be the generic driver for your Intel® HD graphics controller and you probably have to use a manual installation of the drivers (reference link for manual installation https://www.intel.com/content/www/us/en/support/articles/000005629/graphics-drivers.html https://www.intel.com/content/www/us/en/support/articles/000005629/graphics-drivers.html). I am going to try this situation in a similar environment. Hope this helps. Best Regards,Leonardo C.

[idata]

Hello tarquinwj

I was checking your case and would like to know if you have had an opportunity to test the new Intel® HD graphics driver versions.

Regards,Leonardo C.