CEF Offscreen-Rendering (OSR)

Name	When	Description
about	On-Demand	A centered "About" dialog box with Jellyfin Desktop version information. Appears only when explicitly navigating to it via the context menu
overlay	Startup-Only	Jellyfin Desktop's server connect UI and loading spinner
web	Indefinite	The connected Jellyfin server's web UI

MPV

Video Output

MPV's libmpv render API lacks many important features that the standalone MPV player window supports (gpu-next, HDR, etc). Jellyfin Desktop works around that by essentially starting and wrapping a standalone MPV window. Implementation varies by platform.

Platform	Implementation
Wayland	Use wl-proxy to intercept MPV's Wayland connection and reparent the video surface to a subsurface of Jellyfin Desktop.