JellyProxy

A proxy that sits between jellyfin-mpv-shim and mpv to filter and control IPC commands.

What it does

Jellyfin-mpv-shim sometimes overrides your carefully configured mpv settings. JellyProxy prevents this by intercepting commands between JMS and mpv, letting you block unwanted changes while keeping the features you want.

Installation

pip install jellyproxy

Quick Start

1. Generate a config file:

   jellyproxy --generate-config > ~/.config/jellyproxy/conf.json
   

2. Edit the config to block commands you don't want. The example config blocks set_property commands that override your settings.

3. Update your JMS config to point to the proxy socket:

   {
     "mpv_ext": true,
     "mpv_ext_ipc": "/tmp/mpvSockets/spoof",
     "mpv_ext_start": false,
     "mpv_ext_path": null,
   }
   

   Note, mpv_ext_ipc should match your spoof_socket path in ~/.config/jellyproxy/conf.json, if you've changed it.

4. Run it:

   jellyproxy
   

That's it. JellyProxy will start mpv and JMS automatically, and your mpv settings won't get clobbered anymore.

Configuration

The config file uses JSON with two main filtering lists:

• blacklist - Commands to block
• whitelist - Commands to explicitly allow (overrides blacklist)

Each rule matches commands using regex patterns:

{
  "blacklist": [
    {
      "#": "Block JMS from changing OSC setting",
      "command": ["set_property", "osc", ".*"]
    }
  ],
  "whitelist": [
    {
      "#": "But allow subtitle color changes",
      "command": ["set_property", "sub-color", ".*"]
    }
  ]
}

Command Line Options

jellyproxy --help                    # Show all options
jellyproxy --config myconfig.json    # Use custom config
jellyproxy --debug                   # Enable debug logging
jellyproxy --validate               # Check config for errors

Config Reloading

JellyProxy watches your config file and restarts automatically when you make changes. No need to manually restart.

Logging

All IPC traffic gets logged so you can see what commands JMS is sending. Use --debug for extra detail, or edit the logging section in your config.

Socket Paths

By default:

• JMS connects to /tmp/mpvSockets/spoof (the proxy)
• Proxy connects to /tmp/mpvSockets/real (actual mpv)

Change these in the config if needed.

Troubleshooting

JMS can't connect: Check that the socket paths match between your JMS config and JellyProxy config.

Commands not being filtered: Run with --debug to see the exact commands being sent and whether they match your rules.

Config errors: Use jellyproxy --validate to check for problems.

Multiple JMS instances: The old config reloading had a bug that left processes running. This is fixed now.

Requirements

• Python 3.8+
• python-mpv-jsonipc (pip install python-mpv-jsonipc)
• A working jellyfin-mpv-shim setup

License

GPL-3.0