How do I create an auto-profile that only enables hardware decoding (hwdec) when not playing a "hi10p" video

[mlindner]

hi10p videos are generally not compatible with hardware decoders as they're outside the standard. I'm rather tired of having error spam and delayed startup whenever I play a "hi10p" video (i.e. a non-hdr h264 video with 10 bit color). I'd prefer it just never try to initialize hardware decoding.

Example of the errors:

[ffmpeg/video] h264: no frame!
[ffmpeg/video] h264: Hardware is lacking required capabilities
[ffmpeg/video] h264: Failed setup for format cuda: hwaccel initialisation returned error.
[ffmpeg/video] h264: no frame!
[ffmpeg/video] h264: no frame!
AO: [pulse] 48000Hz stereo 2ch s16
[ffmpeg/video] h264: Failed setup for format vulkan: hwaccel initialisation returned error.
[ffmpeg/video] h264: no frame!
[ffmpeg/video] h264: Hardware is lacking required capabilities
[ffmpeg/video] h264: Failed setup for format cuda: hwaccel initialisation returned error.
[ffmpeg/video] h264: no frame!
[ffmpeg/video] h264: Failed setup for format vaapi: hwaccel initialisation returned error.
[ffmpeg/video] h264: no frame!
[ffmpeg/video] h264: no frame!
VO: [gpu-next] 1920x1080 yuv420p10

A simple solution would be to just disable hardware decoding on all h264 videos but I'd prefer to avoid that.

I currently have tried:

[hi10p]
profile-cond=p["current-tracks/video/codec"] == "h264" and p["video-params/pixelformat"] == "yuv420p10"
hwdec=no

which works, but there's a race condition of some sort and it often activates "too late" so it only works for further files in the same playlist.

I've also tried this, but it doesn't work at all as it activates instantly at startup and reads empty parameters and never runs again:

[nohi10p]
profile-cond=p["current-tracks/video/codec"] ~= "h264" or p["video-params/pixelformat"] ~= "yuv420p10"
hwdec=yes

[llyyr]

Instead of setting hwdec=yes, set hwdec=vaapi (or whatever API you want to use) explicitly. This will be the best of all worlds, the probing will be cut out so mpv will start up faster and the fallback will be instant too

[mlindner]

Is there a way to pick? I've tried several and they all seem to work. vulkan, vaapi, nvdec

[llyyr]

If nvdec works you're probably on nvidia, in which case don't use vaapi because that's almost definitely an emulation with nvdec. And also don't pick vulkan, because it's quite buggy with Nvidia gpus

[mlindner]

Hmm I've been using vulkan all this time without problems via auto (as auto selects it). I don't think its buggy. I use arch though so not on old versions of things. Is there an advantage to Vulkan vs nvdec if I'm not seeing problems on vulkan?

[llyyr]

I don't think there should be any differences. There's a push for vulkan in order to be able to use the same API across every vendor on every platform. Eventually everything will use vulkan, but right now it might be buggy or things might occasionally break