yt-dlp - Live Chat JSON to MP4 Video

Converts .live_chat.json from yt-dlp to .mp4 video for overlaying live chats over recorded streams.

How to use

1. Install Node.js

2. Install FFmpeg
   (For Windows users: download ffmpeg.exe and place it next to the script file)

3. Install dependencies

   npm install

4. Download the YouTube stream with live chat replay using yt-dlp:

   yt-dlp --live-from-start --write-subs https://www.youtube.com/watch?v=CqnNp8kwE78

5. After the stream download completes, a video_id.live_chat.json file will appear in the directory.
   Pass this file to the script:

   node ./chat-to-video.js video_id.live_chat.json

   When conversion is complete, the result will be in the output.mp4 file

Command line arguments

node ./chat-to-video.js [OPTIONS] video_id.live_chat.json -o output.mp4

Options

• -o output.mp4 --output output.mp4 - Output filename
• --width 385 - Video width
• --height 400 - Video height
• --frame-rate 10 - Video framerate
• --font 'bold 16pt Arial' - Chat font
• --background-color '#000000' - Chat background color
• --author-color '#aaaaaa' - Author name color
• --message-color '#ffffff' - Message text color
• --from 0 - Start time in seconds
• --to 60 - End time in seconds
• --no-avatars - Skip downloading user avatars