2nd play failure (update)

[dream7180]

Archlinux as a HTPC and NAS server (no desktop): nodejs-18.7, npm-8.16, mpv-0.34.1, ffmpeg-5.0.1 (all official build)
mpv-remote-node and app are up-to-date.
I run mpv and mpv-remote-node as an system service (mpv.service as below):

[Unit]
Description=MPV Media Player
After=network-online.target

[Service]
User=root
Group=root
Type=simple
ExecStart=/usr/bin/mpv --idle
ExecStartPost=/usr/bin/node /root/.config/mpv/scripts/mpvremote/remoteServer.js --expose-gc
Environment=NODE_ENV=production
Restart=on-failure
RestartSec=6
RemainAfterExit=yes

[Install]
WantedBy=multi-user.target

mpv-remote APP connection is OK, and play a video by the APP is OK. After the first play is stopped, I choose another (or just the same) video to play, it will fail. The APP connection is still OK, but unable to play unless I restart the mpv.service, problem repeated. It happened since the last issue I raised. It has noting to do with the uselocaldb. Now the service log changes, please take a look, I can not confirm whether mpv or mpv-remote or ffmpeg cause this bug.

This is log of the first play (successful) :
17:43
VO: [gpu] 1920x1080 vaapi[nv12]
17:43
AO: [alsa] 48000Hz stereo 2ch float
17:43
Using hardware decoding (vaapi).
17:43
Cannot load libcuda.so.1
17:43
[vo/gpu/vaapi-egl] failed to retrieve libavutil frame constraints
17:43
[ffmpeg] AVHWDeviceContext: Failed to query surface attributes: 20 (the requested function is not implemented).
17:43
[vo/gpu/opengl] Failed to set up VT switcher. Terminal switching will be unavailable.
17:43
[vo/gpu] Can't open TTY for VT control: No such device or address
17:43
error: XDG_RUNTIME_DIR is invalid or not set in the environment.
17:43
(+) Audio --aid=1 () (aac 2ch 44100Hz)
17:43
(+) Video --vid=1 () (h264 1920x1080 25.000fps)
17:43
[mpvremote] }
17:43
[mpvremote] flag: 'append-play'
17:43
[mpvremote] filename: '/nasd1/Video/MTV/SNH48/SNH48_1080p.mp4',
17:43
[mpvremote] {

This is log of the subsequent play (failure) :
18:42
[mpvremote] Entry added/updated
18:42
[mpvremote] Watchlisthandler called
18:42
[mpvremote] Mediastatus updated
18:42
Video: no video
18:42
Error opening/initializing the selected video_out (--vo) device.
18:42
[vo/gpu] Failed initializing any suitable GPU context!
18:42
error: XDG_RUNTIME_DIR is invalid or not set in the environment.
18:42
[vo/gpu/opengl] Failed to set CRTC for connector 95: Permission denied
18:42
[vo/gpu] Failed to commit ModeSetting atomic request (-13)
18:42
[vo/gpu/opengl] Failed to set up VT switcher. Terminal switching will be unavailable.
18:42
[vo/gpu] Can't open TTY for VT control: No such device or address
18:42
error: XDG_RUNTIME_DIR is invalid or not set in the environment.
18:42
Subs --sid=2 'TC' (ass)
18:42
(+) Subs --sid=1 () 'SC' (ass)
18:42
(+) Audio --aid=3 --alang=chi (ac3 6ch 48000Hz)
18:42
Audio --aid=2 --alang=jpn (opus 7ch 48000Hz)
18:42
Audio --aid=1 --alang=jpn () (opus 2ch 48000Hz)
18:42
(+) Video --vid=1 (*) (hevc 1920x1036 23.976fps)
18:42
Playing: /nasd1/Video/Movie/动画/千と千尋の神隠し Spirited Away [BD 1920x1036 HEVC-10bit OPUSx2 AC3]/千と千尋の神隠し Spirited Away [BD 1920x1036 HEVC-10bit OPUSx2 AC3.mkv
18:42
[mpvremote] }
18:42
[mpvremote] flag: 'append-play'
18:42
[mpvremote] filename: '/nasd1/Video/Movie/动画/千と千尋の神隠し Spirited Away [BD 1920x1036 HEVC-10bit OPUSx2 AC3]/千と千尋の神隠し Spirited Away [BD 1920x1036 HEVC-10bit OPUSx2 AC3.mkv',
18:42
[mpvremote] {

[husudosu]

Interesting MPV-remote should not affect your decoding settings. The remote server mainpulates only the HTTP Header fields when opening stream from other apps for example Aniyomi.

18:42
Video: no video
18:42
Error opening/initializing the selected video_out (--vo) device.
18:42
[vo/gpu] Failed initializing any suitable GPU context!
18:42
error: XDG_RUNTIME_DIR is invalid or not set in the environment.
18:42
[vo/gpu/opengl] Failed to set CRTC for connector 95: Permission denied
18:42
[vo/gpu] Failed to commit ModeSetting atomic request (-13)
18:42

These lines look suspicious for me. It seems by some reason MPV cannot get Video device and XDG_RUNTIME_DIR has been not set.
Maybe try running MPV without the daemon.

BTW: I did a pull request on node-mpv, no response yet (it's been a month). For next release probably gonna replace node-mpv with my fork. Based on recent activity of project, seems it's not maintained anymore. I'll try to maintain it.

[dream7180]

XDG_RUNTIME_DIR not set will not cause failure. problem is that 2nd playing can not load GPU decoding anymore. I think run mpv in idle mode is not an issue, and have to do this to keep connection for mpv-remote app.
[vo/gpu] Failed to commit ModeSetting atomic request (-13)
[vo/gpu/opengl] Failed to set CRTC for connector 95: Permission denied

[dream7180]

If I disable GPU decoding (vo=drm in mpv.conf), then everything will be OK. But this is not what I want for it will cause high CPU occupation.