XML config for VDD

[kltye]

I have an Intel iGPU that's capable of AV1 encoding, but my RTX 3090 isn't. Sunshine's docs say that the display the GPU is connected to must support the codec in use (AV1 in this case). I know that the virtual display driver supports a config file for GPU selection; where should I put the vdd_settings.xml file?

[ClassicOldSong]

You don't need a xml file for Apollo. Just set the Adapter Name to your iGPU in Apollo, and launch games with dGPU, which I suppose you already know how.

[kltye]

Here's a screenshot of that tab:

dxgi-info:

====== ADAPTER =====
Device Name : NVIDIA GeForce RTX 3090
Device Vendor ID : 0x000010DE
Device Device ID : 0x00002204
Device Video Mem : 24326 MiB
Device Sys Mem : 0 MiB
Share Sys Mem : 37045 MiB

====== OUTPUT ======
Output Name       : \\.\DISPLAY3
AttachedToDesktop : yes
Resolution        : 3840x2160

Output Name       : \\.\DISPLAY1
AttachedToDesktop : yes
Resolution        : 3840x2160

Output Name       : \\.\DISPLAY2
AttachedToDesktop : yes
Resolution        : 3840x2160

====== ADAPTER =====
Device Name : Intel(R) Graphics
Device Vendor ID : 0x00008086
Device Device ID : 0x00007D67
Device Video Mem : 128 MiB
Device Sys Mem : 0 MiB
Share Sys Mem : 37045 MiB

====== OUTPUT ======
Output Name       : \\.\DISPLAY5
AttachedToDesktop : yes
Resolution        : 1920x1080

====== ADAPTER =====
Device Name : NVIDIA GeForce RTX 3090
Device Vendor ID : 0x000010DE
Device Device ID : 0x00002204
Device Video Mem : 24326 MiB
Device Sys Mem : 0 MiB
Share Sys Mem : 37045 MiB

====== OUTPUT ======

====== ADAPTER =====
Device Name : Microsoft Basic Render Driver
Device Vendor ID : 0x00001414
Device Device ID : 0x0000008C
Device Video Mem : 0 MiB
Device Sys Mem : 0 MiB
Share Sys Mem : 37045 MiB

====== OUTPUT ======

[ClassicOldSong]

Intel(R) Graphics is the full name of your iGPU? What does it say in Device Manager?

[kltye]

Yup, it's apparently what the Arrow Lake GPU is identified as:

[kltye]

Creating that registry key you mentioned above appears to attach the virtual display to the iGPU correctly (I ran dxgi-info to verify), but then I get no video (audio works), and then after a while Artemis complains about receiving no video data.

[ClassicOldSong]

Sometimes client issues can cause false alarms about no video, reboot your client device can fix.

Theoretically there's no difference in mechanism between SudoVDA and VDD from MTT, if one works but not another, usually it's just something misconfigured.

[kayti]

My 2 cents, using iGPU for encoding and playing on dGPU is possible, but performance could be low in higher res/refresh rate. Uncompressed frame is copied from dGPU to iGPU before encoding, which could add significant latency. I tried this with 2x dGPU (RTX 3080 and A380), couldn't get more than 60 frames in 3440x1440, if target was higher, it was able to stream but with 300 ms++ latency which was unusable. Even within operational framerate there was at least 20+ more ms latency in AV1 on A380 compared to pure RTX 3080 in HEVC.