[vk-video] Small video files produced on some AMD graphics cards

[landaire]

I'll say up front that I do not have sufficient information or reproduction steps, but wanted to file this issue to maybe get the ball rolling and see if this is maybe a known issue.

I have an application which supports reading some match replay files from a videogame and producing a video showing what happened in the match. The application is written using egui for the UI and wgpu for the rendering backend, albeit v27.

Two users with AMD graphics cards reported files <1MiB, which should typically be in the ~10-20MiB range. The cards are:

• 6700XT
• 6600XT

They also report seeing an AMD error:

The video encoder can be found here: https://github.com/landaire/wows-replays/blob/5418f57d49f8c3085705233ed8cfb827697e36c4/minimap-renderer/src/video.rs#L48-L190. While Claude heavily assisted with this aspect of the application, the encoder looks quite similar to the encoder example and the encoder seems to work mostly fine on NVIDIA graphics cards.

Before I ask these users for video samples, is there any sort of information I should request which may be useful in debugging the issue further?

[jerzywilczek]

If the users could run the app with the vulkan validation layers enabled, that could shed some light. We have a feature for that, vk_validation, but I don't know whether it would work on Windows (which I assume the users are using). There are other ways to enable the validation layers, though all of them (including our feature) require the user to have the Vulkan SDK installed. It would be very helpful to see the logs with validation enabled.
Getting the output of vulkaninfo (or even vulkaninfo --html) could also help, but you need the SDK for that, too.

It would also be nice if they report the issue to AMD, since it might be the fault of the driver (Vulkan Video is a relatively new extension and the drivers didn't have the time to mature yet)

If you can send us the video files, we'll take a look as well.

[noituri]

I managed to reproduce it and I think it's related to #1740

[landaire]

Sounds similar to what my users were encountering.

[noituri]

I think it's fixed now. I cloned your repo and used vk-video from master and it looks like it's working now. We'll probably release new version on crates io soon.

[jerzywilczek]

@landaire We released v0.2.1, which we believe fixes the error.

[landaire]

Awesome! Will update my dependencies and report back after getting some field testing. Thank you!