Quick, hacky shell script to download and install Microsoft Media Framework into Proton 4.11 to support Borderlands on Steam.

install-media-framework.sh

#!/usr/bin/env bash

LOCATE=$(command -v locate)
if [ -z "$LOCATE" ]; then
	echo "The program 'locate' is not available.  Cannot determine location of steam install."
	exit 1
fi

STEAMS=$(locate compatdata | grep steam | sed 's/\(steam.*compatdata\).*$/\1/' | sort | uniq | wc -l)
if [ "$STEAMS" -eq 0 ]; then
	echo "Could not locate steam install."
	exit 1
fi

if [ "$STEAMS" -gt 1 ]; then
	echo "More than one installation of steam detected. This script can't know which one to use."
	exit 1
fi

STEAMHOME=$(locate compatdata | grep steam | sed 's/\(steam.*compatdata\).*$/\1/' | sort | uniq)

git clone https://github.com/z0z0z/mf-install
git clone https://github.com/z0z0z/mf-installcab

cd mf-install || echo "Could not find mf-install" && exit 1
PROTON="$STEAMHOME/common/Proton 4.11/" WINEPREFIX="$STEAMHOME/compatdata/397540/pfx" ./mf-install.sh -proton
cd ../mf-installcab || echo "Could not find mf-installcab" && exit 1
WINEPREFIX="$STEAMHOME/compatdata/397540/pfx" ./install-mf-64.sh
cp mfplat.dll "$STEAMHOME/common/Borderlands 3/OakGame/Binaries/Win64/"