Topic: Text+Video+Audio Discussion System written in Rails

I just want to ask if there is a gem that I can use to do the following. It's sounds like a chat system only that it comes separately: a feat for chatting only, a video only, and an audio only discussion.

I've already done text chatting with a simple script, but I'm having problem looking for a code, a gem or something that might help me to create a video/audio discussion feat. Do you have suggestions for this one?

Thanks in advance.