Remove OMX and MMAL from ARM builds

[ferferga]

For 10.8, I think we should remove all of the Pi-specific hardware acceleration stuff: it never worked properly (besides a very specific configuration set) and it's better to integrate something that truly works fine instead of the patchwork that current MMAL and OMX is.

Raspberry Pi development is transitioning towards V4L2 for hardware decoding/encoding and MMAL/OMX are in a deprecation path. They also only worked properly in Raspbian Stretch and Pi3 devices, other configurations produced mixed results. Right now, in Bullseye, ffmpeg and ffprobe doesn't start at all.

With this patch, Pis will do software encoding/decoding (which is what most people ended using up anyway) until there's a better hardware acceleration path in the future.

Fixes jellyfin/jellyfin#32 jellyfin/jellyfin#75

[nyanmisaka]

+1 for this. Link to the issue #310

[ferferga]

jellyfin/jellyfin#29 has useful resources as well

[nyanmisaka]

LTGM

error: RPC failed; curl 56 GnuTLS recv error (-54): Error in the pull function.
fatal: the remote end hung up unexpectedly
fatal: early EOF

[joshuaboniface]

LGTM aside from the mentioned comment.

[nyanmisaka]

The github server seems to be unstable these days.
Is there a better way to make git retry after losing the connection?

[ferferga]

@nyanmisaka Thats what I'm trying to fix with the latest commits, but I think it's a bug in the git installed, not 100% related to GitHub (which also plays a role as some of these repos clone rather slow).

[ferferga]

@nyanmisaka Checks are passing now, stretch is failing for a completely different reason. Probably jellyfin/jellyfin#65 ? First checks with fails in that strecth suite comes from that merge

[nyanmisaka]

LTO is not supported in old GCC. We should retire stretch.

[Shadowghost]

I'm all in for deprecating Debian stretch. We should only support Debian stable and oldstable imo (same for the other packages).