Clone the project first:
git clone https://github.com/henriquebol/bbb-recorder.git
cd bbb-downloader
docker-compose up -d
Now access:
localhost:8080
When you will run the command that time chromium
browser will be open in background & visit the link & perform screen recording. Later it will give you file mp4.
Note: It will use extra CPU to process chrome & ffmpeg.
Thanks to @jibon57 and@muralikg. Lib was copied from there & I did some adjustment and add in a docker container.