Plex-Blackmagic

A Cloudflare Worker for Plex that uses blackmagic to change default client bitrates!

See this long Plex forum thread for more information: https://forums.plex.tv/t/default-all-clients-to-max-internet-streaming/440641

This is a fork of Plex-Blackmagic by @zmike808, via changes from @buroa. I have updated the script to a modern Cloudflare Worker format and added the Cloudflare Button deploy option.

The default streaming quality for clients is set to 12Mbps (BITRATE variable set at 12000). You can change this during the deploy.

Pre-requisites

You're using a Cloudflare Tunnel to route traffic to your Plex server.

This is the best guide I've found: https://mythofechelon.co.uk/blog/2024/1/7/how-to-set-up-free-secure-high-quality-remote-access-for-plex

And here's one for Unraid: https://dicloak.com/video-insights-detail/simple-cloudflare-tunnel-setup-on-unraid-for-beginners

Quick deploy to Cloudflare

In the instructions below, replace plex.example.com and example.com with your own subdomain and domain.

1. Deploy using the Cloudflare button:

You will set your URL (e.g. plex.example.com) and BITRATE as part of the Worker setup.

2. Add routes:

• Settings > Domains & Routes
• Add a new route
• Choose zone (same as your domain)
• Choose "Failure mode: Fail closed (block)" for each route
• Add these routes:
  • plex.example.com/video/:/transcode/universal/decision*
  • plex.example.com/video/:/transcode/universal/start*
  • plex.example.com/video/:/transcode/universal/subtitles*

Alternative setup

Fork this repository and add your variables and routes to wrangler.jsonc.

Then create a new Worker by importing your forked repository.

"vars": {
	"URL": "plex.example.com",
	"BITRATE": "12000"
},
"routes": [
		{
			"pattern": "plex.example.com/video/:/transcode/universal/decision*",
			"zone_name": "example.com"
		},
		{
			"pattern": "plex.example.com/video/:/transcode/universal/start*",
			"zone_name": "example.com"
		},
		{
			"pattern": "plex.example.com/video/:/transcode/universal/subtitles*",
			"zone_name": "example.com"
		},
	]

Post-deploy

1. Start streaming something.
2. Go into your Worker and check the Logs for live activity. You should set GET requests against the routes you've set up.