Contradiction - Spot The Liar! (373390)

Compatibility Report

• Name of the game with compatibility issues: Contradiction - Spot The Liar!
• Steam AppID of the game: 373390

System Information

Distro: Linux Mint 19.1 Tessa (64 bit)
GPU: Vega 56
Driver/LLVM version: Mesa 19.1.0-devel/9.0.0
Kernel version: 5.1.0-050100-lowlatency
Proton version: 4.2-3

I confirm:

• that I haven't found an existing compatibility report for this game.
• that I have checked whether there are updates for my system available.

Symptoms

Launching the game there is no video just a black screen but you can hear audio. Also shutting down the games window does not exit the game gracefully, the process remains running.

media_info.txt
steam-373390.log
system_info.txt

examining the logs, the game appears to use mfplat "12422.317:003e:003f:fixme:mfplat:MFStartup (131184, 0): stub"

The videos are: MP4, AVC + AAC
see issue #1464

Reproduction

Just launch the game

Start by reproducing Steam AppID 373390 with Proton 4.2-3 and review steam-373390.log, media_info.txt, and system_info.txt. Investigate the reported mfplat stub and the MP4/AVC/AAC videos; done means video renders at launch and closing the game exits its process cleanly.