Hmm, i'm getting the same error with the game crashing even with gst-libav installed...
extra/gst-editing-services 1.22.1-2 [installed]
extra/gst-libav 1.22.1-2 [installed]
extra/gst-plugin-gtk 1.22.1-2 [installed]
extra/gst-plugin-pipewire 1:0.3.67-1 [installed]
extra/gst-plugins-bad 1.22.1-2 [installed]
extra/gst-plugins-bad-libs 1.22.1-2 [installed]
extra/gst-plugins-base 1.22.1-2 [installed]
extra/gst-plugins-base-libs 1.22.1-2 [installed]
extra/gst-plugins-good 1.22.1-2 [installed]
extra/gupnp-dlna 0.12.0-2 [installed]
extra/rygel 1:0.42.1-1 (gnome) [installed]
Game is running fine (With video playback) on the Steam Deck. Is there a list of packages required for video playback on Arch?
Nothing extracted yet.
Compatibility Report
System Information
I confirm:
steam-1173220.log
Symptoms
Game runs great in-game but will freeze when opening an in-game menu, e.g. pause menu.
Reproduction
Start the game through steam. Once in-game, press escape to open the pause menu, game freezes.
Fix
As seen in the log file, there was just a missing av decoding g-streamer plugin:
On arch linux I fixed this by installing gst-libav, but ideally an end-user shouldn't have to figure this out and the gst av libs should be a dependency of proton or something.