GE-Proton9-4-rtsp7

Changes since 6:

• Fixed an issue that happened when the source stream didn't have a fixed native format
• Fixed a not-too-uncommon race condition that caused presentation timestamps to be wrong
• Fixed an issue where Wine tried to seek live streams and that failed on some setups with a "Server does not support Range header" error
• Fixed a potential issues with gstreamer elements that require a streams-aware container
• Converted a workaround for missing buffering events into a proper implementation of buffering events
• Misc. other clean-ups of the code
• AVPro seeking is still broken

Create a ~/.steam/steam/compatibilitytools.d/ folder and extract the contents of this tar.gz there.
Set your VRChat Proton version to the rtsp7 variant in the Steam app properties.