WebRTC

Here are some notes for webinars software

The goal was to show a prerecorded video and do live Q&A (with camera)

If this document is incomplete of unclear feel free to contact @rzr

Contact: https://purl.org/rzr/

• I used GNU/Linux Ubuntu 20.10 on X11, Firefox 83
• built custom OBS to enable v4l2loopback
• unplugged real webcam
• modprobe -v v4l2loopback
• plugged real webcam
• start obs
• obs / create scene : window capture (I captured Firefox window set as fullscreen)
  • optionally add some text, , add videocapture (real camera)
• obs/ desktop audio : -8.5 db & mic/aux : -2.2 db
• firefox/ show content (i played an existing video from peertube in Firefox)
• PulseAudio Volume/ Obs Monitor : not muted, not locked , 110%

Then I start an other Firefox instance to join the WebRTC conference (ie: jitsi)

• camera to share : "dummy video device 0x0000"
• microphone to share : "Monitor of Builtin Audio analog stereo"