Vulkan video decoding is not working for AV.1 codec with RADV

[ya-isakov]

Describe the bug
Vulkan video decoding is not working for AV.1 codec with RADV (Mesa 24.3.3, FFMPEG 7.0.2, SDL2 2.30.7). It works in MPV properly. Also AV.1 decoding works with vaapi, and vulkan video decoding works for H.265.

Steps to reproduce
Run Moonlight with AV.1 enabled, forced hardware decoding, and no vaapi driver (I moved it to other folder, to make sure that it's vulkan decoding). With AV.1 coming from Sunshine, there is error, that video card is not supporting hardware decoding.

Screenshots
No screenshots, as there is no stream.

Affected games
Desktop streaming affected

Other Moonlight clients

• Does the issue occur when using Moonlight on iOS or Android? I did not test

Moonlight settings (please complete the following information)

• Have any settings been adjusted from defaults? Yes
• If so, which settings have been changed? AV.1 enabled, forced hardware decoding
• Does the problem still occur after reverting settings back to default? No, because default setting are probably falling back to software decoding.

Gamepad-related issues (please complete if problem is gamepad-related)
Not related

Client PC details (please complete the following information)

• OS: Gentoo Linux
• Moonlight Version: 6.1.0
• GPU: AMD 780M (APU in AMD Ryzen Pro 7840U)
• Linux package type (if applicable): Gentoo portage

Server PC details (please complete the following information)

• OS: Windows 11
• Sunshine or GeForce Experience version: Sunshine 0.21.0
• GPU: Nvidia RTX 4070 Ti Super
• GPU driver: 566.03

Moonlight Logs (please attach)
moonlight.log

Additional context