OBS/Plugin Crash Without GPU (On Linux)

[VladislavF]

When adding the filter to an audio source OBS will crash if you don't have a GPU installed

To Reproduce

Steps to reproduce the behavior:

1. Open OBS
2. Add the filter to an audio source

Expected behavior

The filter should initialize and default or fall-back to CPU

Log and Crash Report
warning: [obs-cleanstream] Invalid GPU device selected: 0. Using CPU for inference/home/runner/work/occ-ai-dep-whispercpp/occ-ai-dep-whispercpp/build/Whispercpp_Build-prefix/src/Whispercpp_Build/ggml/src/ggml-backend.cpp:501: GGML_ASSERT(device) failed

Desktop (please complete the following information):

• OS: Ubuntu 24.04
• Plugin Version: 0.2
• OBS Version: 32

Additional context
It is clear the problem comes from the pre-compiled whisper/GGML libraries which are for some reason failing to use the CPU.
for argument, I tried removing all video libraries (Blas, vulkan, opencl) via cmake flags and building from source. unfortunately, since artifacts are pulled, flags to disable libraries are effectively ignored. So there's a sort of two part bug here, unless I just don't understand how to make the build system actually build instead of pull artifacts (very possible).

Asks:

OBS-log.txt

• I don't see why whisper/ggml are failing to fallback to CPU, this seems like it should work and is maybe their bug?
• But in the absence of that option simply compiling with GPU features disabled would be possible.

[VladislavF]

Actually, I am now curious what system requirements I must be missing here. I just tried this on an ubuntu 22.04 machine with mesa-opencl and vulkan installed. It is an older box with a radeon HD6750, but the crash is exactly the same with the same GGML error.
I tried versions of the plugin all the way back to 0.0.7 and I have tried with OBS 30.2.3 from the PPA as well as 32 from the flatpak. Plugin versions before 0.1.3 crash silently (core dump) while all other configurations show the GGML error.
Given that the crash is exactly the same on machines with and without a GPU across two different versions of Ubuntu, I am starting to wonder if the linux version has been broken for a long time.

obs_22.04.txt