Using Python to Display Live Stream Chat in OBS

Yes, you can absolutely use a local Python script to read live stream chat and automatically update a text source in OBS Studio. This setup is highly customizable and allows you to display recent messages, featured viewer comments, or chat-driven alerts directly on your stream overlay. The process involves using Python to connect to your streaming platform’s chat API (such as Twitch IRC or YouTube Live Chat) and then updating OBS using either a local text file or the OBS WebSocket protocol.

How the Integration Works

There are two main methods to bridge your Python script with OBS Studio:

Method 1: The Local Text File (Simplest)

This is the easiest method to set up and requires no external Python libraries for OBS interaction. 1. Python Writes to File: Your Python script connects to the chat, retrieves the latest message, and writes that text to a local .txt file on your computer. 2. OBS Reads the File: In OBS, you add a Text (GDI+) source. In the source properties, check the box that says Read from file and select the .txt file created by your script. 3. Automatic Updates: Every time your Python script overwrites the text file with a new chat message, OBS instantly updates the text on your screen.

Method 2: OBS WebSockets (Advanced & Real-time)

For more control, such as changing text colors, hiding/showing sources, or updating multiple sources simultaneously, you can use OBS WebSockets (built into OBS Studio 28 and newer). 1. Enable WebSockets in OBS: Go to Tools > WebSocket Server Settings in OBS and enable the server. Note the port and set a password. 2. Install Python Library: Install the obsws-python library via pip. 3. Direct Control: Your Python script connects directly to OBS over the local network and uses API commands to change the text of your source instantly without needing a physical text file.

Step-by-Step Implementation

To build this system, you will need to follow three general steps:

  1. Connect to Chat: Use Python to listen to your stream. For Twitch, you can connect to Twitch’s IRC server using standard Python sockets or the twitchio library. For YouTube, you can use the YouTube Live Streaming API.
  2. Parse the Data: Write a loop in Python that constantly listens for incoming data, filters out usernames and message content, and formats them (e.g., “Username: Message”).
  3. Update OBS: Apply either the text-file writing method or the WebSocket connection to push the formatted string to your OBS text source.