Use AI to understand, add comments, add utests, refactor code for PR #4289
To enable H.265 support for the WebRTC protocol, upgrade the pion/webrtc library to version 4. --------- Co-authored-by: john <hondaxiao@tencent.com> Co-authored-by: winlin <winlinvip@gmail.com>
------ Co-authored-by: chundonglinlin <chundonglinlin@163.com>