[BUG]: After upgrading to 3.1.0 exp7, the 4K video stream is too laggy

[ViKeei]

Package version

3.1.0-exp.7

Environment

* OS:Windows 10
* Unity version:Unity2022.3.1
* Graphics API:DirectX11
* Browser:Microsoft Edge 116

Steps To Reproduce

After upgrading to 3.1.0 exp7, the 4K video stream is too laggy, the screen of 3.1.0 exp6 is very smooth.
with the same scene :
3.1.0 exp7 : 4K 25FPS H264
3.1.0 exp6 : 4K 37FPS H264
Another issue is that Unity crashes when switching Unity Render Streaming versions and immediately connect to web video streaming.

Current Behavior

No response

Expected Behavior

No response

Anything else?

Video_20230818110332_edit.zip

[karasusan]

Hi, I think this fix is related your issue.
We already merged it.
Unity-Technologies/com.unity.webrtc#962

[karasusan]

And as a workaround, the crush might not be occurred using DX12.

[ViKeei]

Things seem to be getting worse, but the 3.1.0 exp6 version is still fine. If opened in default mode, unity will crash directly.There are two types of crashes in the video.
Video_20230818143031.zip

[karasusan]

@ViKeei
Let me check this issue. Please tell me the graphics driver version just in case.
Also, is this crash relating the 4K resolution? How about FHD resolution?

[ViKeei]

NVIDIA RTX 3060Ti, Game Ready 531.18
QHD and 4K UHD both crash, FHD not.

[karasusan]

@ViKeei
Thanks, we're going to check the 4K resolution again.

[karasusan]

@ViKeei
Sorry, I have a question, is this issue reproduced when using DX12 as a graphics device instead of DX11?

[ViKeei]

@karasusan
At your suggestion, subsequent tests and replies have been done in DX12.
Compared to exp6's version, exp7's version running under DX11 only results in 4K frame rate drops and choppy graphics.

[karasusan]

WRS-495

[karasusan]

@ViKeei
Thanks, I want to know this fix is related your issue or not. Can you try it if I provide a package which contains this fix?
Unity-Technologies/com.unity.webrtc#962

[ViKeei]

@karasusan OK, no problem.