WebRTC Call quality is decided by SDP
- Wiki: https://en.wikipedia.org/wiki/Session_Description_Protocol
- Spec: https://tools.ietf.org/html/rfc4566
- On Chrome use “chrome://webrtc-internals” status of a WebRTC Call Session.
Kurento records a call into .webm format
what is webm? WebM is defined as a video and audio container format to provide high quality, royalty-free, open video compression for use with HTML5 video. The WebM container is based on a profile of Matroska. WebM initially supported VP8 video and Vorbis audio streams. In 2013 it was updated to accommodate VP9 video and Opus audio.