Thanks for the info. One more question on that: Do you think it makes sense to rerelease that independently or upstream the changes so that others could also include a more lightweight webrtc library? Or are your changes too far tied to Safari? I guess an optimal solution would need to have some kind of platform abstraction layer which then gets implemented by integrators like Chrome or Safari. Probably a big effort.
There's OpenWebRTC, which is optimized for standalone applications like media servers and proxies. The version in Chromium is also pretty easy to build and run in C/C++ applications on Linux, but requires extra work for an application like Safari.
