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<tilpner>
samueldr: Do you have any ideas on how to prevent that in general? Encoding "works with this (host, target)" in meta is probably unrealistic
<tilpner>
samueldr: But without that, it's easy to dismiss broken cross compilation for being broken before too, or only working with combinations not tested
<tilpner>
Ideally, we would have per-attrpath lists of expected-to-work combinations, and ofborg would verify they all still work
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<samueldr>
tilpner: I don't know :(
<samueldr>
but it's not a bad thought to write it up in meta properties in some ways
<samueldr>
maybe we need to ping Ericson*314 and/or matthewbauer on the subject, if they have idea
<samueldr>
and, while I was a bit annoyed, I wasn't annoyed _at you_ :) the PR body was written up in a transactional tone, which might sound negative, but in reality it should have been read without tone, sorry
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<jslight90>
Hello. I need some assistance or information. I'm trying to run Kodi Media Center on NixOS on a Raspberry Pi 3B. Has anyone been able to get hardware video decoding to work with aarch64 on a Raspberry Pi?
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<ToxicFrog>
Huh. I know the drivers exist, because hardware h264 decoding works in rasplex. But I've never tried getting it working in nixos.
<ToxicFrog>
(note that you won't get h265 decoding regardless, the pi doesn't have hardware for it)
<clever>
i think the rpi is also limited to 8bit stuff, 10bit things will fail
<clever>
i was also reading a thread on the decoder stuff, and its limited to about 50mbit/sec of total h264 data
<clever>
which becomes a limit if your trying to decode several things in parallel
<clever>
or use it as a plex hw transcoder
<jslight90>
I'm just trying to do things like h264 video playback; the video and audio have terrible stutter on NixOS vs using LibreELEC. I can confirm that LibreELEC is using hardware and NixOS is using software to process the video. This causes the processor to max out and not keep up.
<jslight90>
The major difference with LibreELEC is that it runs 32-bit ARMv7 instead of 64-bit AArch64 (which has better cache support on NixOS).
<clever>
jslight90: the gpu libraries wont work on 64bit, because the api involves passing userland pointers to the gpu and back
<clever>
jslight90: and 64bit pointers dont fit in the provided fields
<jslight90>
Does video decoding in hardware work on ARMv7 with NixOS?
<clever>
jslight90: cant remember if i tested it there or not