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Introduction to RTMFP

Author: 柳大·Poechant

Blog:blog.csdn.net/poechant

Email: zhongchao.ustc@gmail.com

Date: April 16th, 2012

1 What is RTMFP?

The SecureReal-TimeMediaFlowProtocol (RTMFP) is a proprietary protocol suite developed by Adobe Systems forencrypted, efficient multimedia delivery through bothclient-serverandpeer-to-peermodels over the Internet.

2 What is the difference between P2P of sharing files and P2P of real-time communication?

RTMFP is a peer-to-peer system, but is only designed for direct end user to end user communication for real-time communication, not for file sharing between multiple peers using segmented downloading.[1] Facebook uses this protocol in its Pipe application to transfer big files directly between two users.

3 What transportation protocol is RTMFP based on?

RTMFP is based on User Datagram Protocol (UDP).

4 What is the difference between RTMFP and RTMFP

RTMP stands for Real-Time Messaging Protocol, and RTMFP stands for Real-Time Media Flow Protocol.

RTMFP is based on User Datagram Protocol (UDP), whereas RTMP is based on Transmission Control Protocol (TCP).

Unlike RTMP, RTMFP also supports sending data directly from one Adobe Flash Player to another, without going through a server.

5 Does Flash Player support RTMFP?

Flash Player 10.0 allowed only one-to-one communication for P2P, but from 10.1 application-level multicast is allowed. Flash Player finds appropriate distribution route (overlay network), and can distribute to the group, which is connected by P2P.

6 Does Cumulus require Cirrus key?

NO! Of course, it’s Cumulus’s main goal: be an cirrus GPL alternative. The only limit: your CPU, memory, and number of ports on one machine.

7 Is this thing legal?

It is legal in the US under the Digitial Millenium Copyright Act. You can drill the thread on WikiPedia: http://en.wikipedia.org/wiki/Real_Time_Media_Flow_Protocol - http://en.wikipedia.org/wiki/Proprietary_protocol - http://en.wikipedia.org/wiki/Digital_Millennium_Copyright_Act “There are legal precedents when the reverse-engineering is aimed at interoperability of protocols.[7][8][9] In the United States, the Digital Millennium Copyright Act grants a safe harbor to reverse engineer software for the purposes of interoperability with other software”

Reference

http://en.wikipedia.org/wiki/Real_Time_Media_Flow_Protocol

http://groups.google.com/group/openrtmfp-cumulus/browse_thread/thread/c91d0f07fea2967e

http://forums.adobe.com/message/3570224

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