AV1 film grain with gpu-next causes SIGABRT

[Harazi]

Important Information

Provide following Information:

• mpv version: b68c742
• Linux Distribution and Version: Archlinux 6.8.9
• Source of the mpv binary: built from master
• Window Manager and version: tested on both Hyprland and River
• GPU model, driver and version: Nvidia GeForce GTX 970, Nouveau

Reproduction steps

$ ~/Repos/mpv/build/mpv --config=no --vo=gpu-next shot1_p4-crf18-10bit-t2-fg20.avif --log-file=/tmp/mpv.log -v -v

Expected behavior

No issue

Actual behavior

mpv crashes with a SIGABRT before displaying the image. Sometimes it will flash a distorted green image for a millisecond before aborting.

The issue is restricted to --vo=gpu-next and an AV1 image/video with synthetic film grain. Images with no film grain will play fine.

Command for creating AV1 images:

$ ffmpeg -ss 00:01:13.417 -i A.Matter.of.Loaf.and.Death.Remux.mkv -frames:v 1 -c:v libsvtav1 -preset 4 -crf 18 -pix_fmt yuv420p10le -svtav1-params tune=2:film-grain=20:film-grain-denoise=0 shot1_p4-crf18-10bit-t2-fg20.avif

mpv.log
shot1_p4-crf18-10bit-t2-fg20.avif.zip

Also, this was printed on stderr:

nouveau: kernel rejected pushbuf: No such device
nouveau: ch6: krec 0 pushes 1 bufs 12 relocs 0
nouveau: ch6: buf 00000000 0000000b 00000004 00000004 00000000 0x77b590180000 0x3ba0000 0x80000
nouveau: ch6: buf 00000001 00000008 00000002 00000002 00000000 (nil) 0x620000 0xe0000
nouveau: ch6: buf 00000002 0000000a 00000002 00000002 00000000 (nil) 0x3b80000 0x20000
nouveau: ch6: buf 00000003 00000009 00000002 00000002 00000002 (nil) 0x700000 0x3480000
nouveau: ch6: buf 00000004 00000006 00000004 00000000 00000004 0x77b59b28c000 0x224000 0x1000
nouveau: ch6: buf 00000005 0000001c 00000002 00000002 00000000 (nil) 0x5655000 0x4000
nouveau: ch6: buf 00000006 0000001e 00000002 00000002 00000000 (nil) 0x59e000 0x2000
nouveau: ch6: buf 00000007 00000011 00000002 00000002 00000000 (nil) 0x4620000 0x440000
nouveau: ch6: buf 00000008 00000028 00000002 00000002 00000000 (nil) 0x6660000 0x880000
nouveau: ch6: buf 00000009 0000002b 00000002 00000002 00000000 (nil) 0x4a60000 0x20000
nouveau: ch6: buf 0000000a 0000002d 00000002 00000002 00000002 (nil) 0x6ee0000 0x21c0000
nouveau: ch6: buf 0000000b 0000002e 00000004 00000004 00000004 (nil) 0x5f6c000 0x1000
nouveau: ch6: psh 00000000 0000015cd0 0000015ce4
nouveau: 	0x200406c0
nouveau: 	0x00000000
nouveau: 	0x00224000
nouveau: 	0x00000005
nouveau: 	0x1000f010
mpv: ../libdrm-2.4.120/nouveau/pushbuf.c:730: nouveau_pushbuf_data: Assertion `kref' failed.

[llyyr]

Can't reproduce here, can you post the stack trace?

[Harazi]

How? with strace?

[llyyr]

How? with strace?

See https://wiki.archlinux.org/title/Debugging/Getting_traces

You can see available coredumps with coredumpctl then open them in gdb with coredumpctl gdb [pid] and follow the wiki. Though it looks like the crash is in nouveau so hard to think how it could be a mpv issue

[Harazi]

I recompiled mpv with meson flag --buildtype debug, but there are still some <optimized out> values. Not sure if I did everything correctly.
gdb.txt

[kasper93]

It crashes deep in Nouveau, try updating you graphic driver stack and report issue upstream.

mpv: ../libdrm-2.4.120/nouveau/pushbuf.c:730: nouveau_pushbuf_data: Assertion `kref' failed.

I doubt there is anything we can do in mpv to workaround this issue.