Autosave output format on exit

[Swixy]

Hello World. .

Can do by quit save value output format?

[eumagga0x2a]

Not automatically. Please use Ctrl+Alt+D (on macOS: Ctrl+Shift+D) which is equivalent to "Edit" --> "Save current settings as default" to save the current video encoder and muxer configuration. It will be automatically restored when Avidemux is launched later.