Your platform doesn't suppport hardware accelerated AV1 decoding

**Describe the bug**
A clear and concise description of what the bug is.

I thought AVI1 was supported in V12 onwards however when trying to generate thumbnails from a file that is encoded in AV1:

- [mov,mp4,m4a,3gp,3g2,mj2 @ 0xdea130] stream 0, timescale not set
- [av1 @ 0xdea580] Your platform doesn't suppport hardware accelerated AV1 decoding.
- [av1 @ 0xdea580] Failed to get pixel format.
- [av1 @ 0xdea580] Missing Sequence Header.

**To Reproduce**
Please provide a GitHub link or code snippet.
const thumbnailArgs = [
'-i', inputFile,
'-vf', `fps=1/${interval},scale=400:-1:flags=bilinear`,
thumbnailFile,
];
const thumbnailErr = await ffmpeg.exec(thumbnailArgs);

**Expected behavior**
A clear and concise description of what you expected to happen.
I would expect it to be able to generate thumbnails from AVI

**Screenshots**
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**Desktop (please complete the following information):**
- OS: [e.g. iOS] Chrome, Safari

**Additional context**
Add any other context about the problem here.