[Unit]
Description=mpv persistent player (DRM/HDMI output, JSON IPC)
# Wait until udev has settled so the DRM/HDMI devices (/dev/dri/*) exist
# before mpv tries to grab the display. Without this, a cold-boot race can
# leave mpv running but never rendering to HDMI (you see the console instead),
# even though the exact same command works when run by hand later.
After=local-fs.target systemd-udev-settle.service
Wants=systemd-udev-settle.service

[Service]
Type=simple
User=${MEDIAPI_USER}
SupplementaryGroups=video render
RuntimeDirectory=mediapi
RuntimeDirectoryMode=0770
# start-mpv.py enumerates the connected HDMI connectors and launches one mpv
# per screen: the primary carries audio + the app's IPC socket, and each extra
# screen gets a video-only mirror mpv on its own socket. If any mpv dies the
# launcher exits non-zero and systemd restarts us, which re-enumerates the
# displays. See the script header for the full rationale.
ExecStart=/usr/bin/python3 ${PROJECT_DIR}/scripts/start-mpv.py
Restart=on-failure
RestartSec=2

[Install]
WantedBy=multi-user.target