Strange behaviour at mpv hw dec

ARM General ARM Discussion
1

I just installed Manjaro-ARM-xfce-vim3-21.06.img at my X96 Max+ . After changes the 01-panfrost.conf to enable 3D AccelMethod, I tried the mpv hw decode :

mpv --hwdec=auto --vo=gpu ./the_local_video_clip.mkv

However , mpv just plays serveral frames and freezes :

(+) Video --vid=1 () (h264 1024x576 25.000fps)
(+) Audio --aid=1 --alang=eng () (aac 2ch 48000Hz)
Cannot load libcuda.so.1
[vaapi] libva: vaGetDriverNameByIndex() failed with unknown libva error, driver_name = (null)
Failed to open VDPAU backend libvdpau_meson.so: cannot open shared object file: No such file or directory
AO: [pulse] 48000Hz stereo 2ch float
Using hardware decoding (v4l2m2m-copy).
VO: [gpu] 1024x576 nv12
Invalid video timestamp: 0.000000 → 0.000000
AV: 00:00:00 / 00:29:31 (0%) A-V: 0.000 Dropped: 3

Exiting… (Quit)

This is just a fresh installation and I havenot updated packages yet. Did I miss sth. ? Regards !

2

I see the same error if use --hwdec=auto or --hwdec=yes.
Does it freezes on all the video file or just this particular video files.

3

I tried another mp4 video clip and designated decoder v4l2m2m-copy with the following cmds :
mpv --hwdec=v4l2m2m-copy ./mandalorian_s02e02.mp4

(+) Video --vid=1 () (h264 1280x720 23.976fps)
(+) Audio --aid=1 () (aac 2ch 48000Hz)
Using hardware decoding (v4l2m2m-copy).
AO: [pulse] 48000Hz stereo 2ch float
VO: [gpu] 1280x720 nv12
AV: 00:00:00 / 00:40:17 (0%) A-V: 0.000 Dropped: 2

Exiting… (Quit)

------------- tried with one more option -------------------------------------------------------------
mpv --hwdec=v4l2m2m-copy --vo=gpu ./mandalorian_s02e02.mp4
(+) Video --vid=1 () (h264 1280x720 23.976fps)
(+) Audio --aid=1 () (aac 2ch 48000Hz)
Using hardware decoding (v4l2m2m-copy).
AO: [pulse] 48000Hz stereo 2ch float
VO: [gpu] 1280x720 nv12
AV: 00:04:59 / 00:40:17 (12%) A-V: -0.000 Dropped: 1

Exiting… (Quit)

There are no warnings or errors at mpv printout . But mpv just doesnot play , it show the still pic. at the video clip. There are sth. strange at dmesg :

[  148.586089] panfrost ffe40000.gpu: js fault, js=0, status=INSTR_INVALID_ENC, head=0x61408c0, tail=0x61408c0
[  148.590466] panfrost ffe40000.gpu: gpu sched timeout, js=0, config=0x7300, status=0x51, head=0x61408c0, tail=0x61408c0, sched_job=000000004f1cbbb2
[  148.616118] panfrost ffe40000.gpu: js fault, js=0, status=INSTR_INVALID_ENC, head=0x6cf4880, tail=0x6cf4880
[  148.620480] panfrost ffe40000.gpu: gpu sched timeout, js=0, config=0x7300, status=0x51, head=0x6cf4880, tail=0x6cf4880, sched_job=00000000037de2d2
[  148.643410] panfrost ffe40000.gpu: js fault, js=0, status=INSTR_INVALID_ENC, head=0x6cf5480, tail=0x6cf5480
[  148.648063] panfrost ffe40000.gpu: gpu sched timeout, js=0, config=0x7300, status=0x51, head=0x6cf5480, tail=0x6cf5480, sched_job=00000000e11d1a81
[  148.664361] panfrost ffe40000.gpu: js fault, js=0, status=INSTR_INVALID_ENC, head=0x6140880, tail=0x6140880
[  148.670464] panfrost ffe40000.gpu: gpu sched timeout, js=0, config=0x7300, status=0x51, head=0x6140880, tail=0x6140880, sched_job=000000004f1cbbb2
[  190.438781] panfrost ffe40000.gpu: js fault, js=0, status=INSTR_INVALID_ENC, head=0x60b34c0, tail=0x60b34c0
[  190.442910] panfrost ffe40000.gpu: gpu sched timeout, js=0, config=0x7300, status=0x51, head=0x60b34c0, tail=0x60b34c0, sched_job=000000000c798bd7
[  300.549270] panfrost ffe40000.gpu: js fault, js=0, status=INSTR_INVALID_ENC, head=0x60b24c0, tail=0x60b24c0
[  300.553461] panfrost ffe40000.gpu: gpu sched timeout, js=0, config=0x7300, status=0x51, head=0x60b24c0, tail=0x60b24c0, sched_job=00000000baa6342a
[  300.570076] panfrost ffe40000.gpu: js fault, js=0, status=INSTR_INVALID_ENC, head=0x6140880, tail=0x6140880
[  300.576103] panfrost ffe40000.gpu: gpu sched timeout, js=0, config=0x7300, status=0x51, head=0x6140880, tail=0x6140880, sched_job=00000000ab566924
[  315.340710] panfrost ffe40000.gpu: js fault, js=0, status=INSTR_INVALID_ENC, head=0x60b38c0, tail=0x60b38c0
[  315.344852] panfrost ffe40000.gpu: gpu sched timeout, js=0, config=0x7300, status=0x51, head=0x60b38c0, tail=0x60b38c0, sched_job=00000000a34308e7
...
[  664.996006] meson-vdec ff620000.video-decoder: VIFIFO usage (16777242) > VIFIFO size (16777216)
[  664.996297] meson-vdec ff620000.video-decoder: VIFIFO usage (16777242) > VIFIFO size (16777216)
[  665.065220] meson-vdec ff620000.video-decoder: VIFIFO usage (16778332) > VIFIFO size (16777216)
[  665.065489] meson-vdec ff620000.video-decoder: VIFIFO usage (16778332) > VIFIFO size (16777216)
[  665.065932] meson-vdec ff620000.video-decoder: VIFIFO usage (16778076) > VIFIFO size (16777216)
[  665.106261] meson-vdec ff620000.video-decoder: VIFIFO usage (16777414) > VIFIFO size (16777216)

… quite a lot of the aboved message …

I tried to chang the topic of this thread since it may mislead people ~~~

4

Just to clear something up.

Hardware video decoding is very hit’n’miss on ARM, as most of the drivers used are not supported by most video renders.

5

Agreed it is a hit and miss for hardware video decode. just tried streaming this, it works. Dropped frames mainly due to mouse pointer movement.

jfl@MNJROGTKPro    mpv --hwdec=v4l2m2m-copy https://www.youtube.com/watch?v=jenVMnOi2uA
 (+) Video --vid=1 (*) (h264 1920x1080 29.970fps)
 (+) Audio --aid=1 --alang=eng (*) (opus 2ch 48000Hz)
[vo/gpu/wayland] GNOME's wayland compositor lacks support for the idle inhibit protocol. This means the screen can blank during playback.
AO: [pulse] 48000Hz stereo 2ch float
Using hardware decoding (v4l2m2m-copy).
VO: [gpu] 1920x1080 nv12
AV: 00:09:52 / 00:10:10 (97%) A-V:  0.000 Dropped: 33 Cache: 17s/7MB

Exiting... (Quit)
6

Hi @JFL, if you are with gnome in wayland shouldn’t you use the option gpu-context=wayland? Because if you don’t i think you are using xwayland to render (if I’m not wrong).

7

Had set it in mpv.conf (if not mistaken, will double check). Based on limited casual testing, it seems mpv works better in XFCE than in GNOME-Wayland (some dropped frames with mouse movement) when --hwdec=v4l2m2m-copy is being activated.

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