As seen on Slashdot:

Adobe uses a proprietary encrypted communications system between their Flash player and their Media Server product. This is intended to ensure that only people who pay for Flash Media Server can stream Flash movies, and only official clients can access them.

In other words, it’s a copy protection (DRM) scam. It’s completely antithetical to the goals of running a free software desktop or serving content to users using free software. However, despite Adobe’s claims, it doesn’t actually provide any security except through the obscurity of the protocol and some short secret keys.

lkcl claims to have created an open source, clean-room implementation of this protocol, called RTMPE, and published it on Sourceforge. Despite promising in January to open RTMP, Adobe wants to protect their revenue stream, so they sent a DMCA takedown notice to Sourceforge, who complied by censoring the project.

If you value your freedom to publish and receive Flash videos using free software, help us fight Adobe and embarrass SourceForge by nominating rtmpdump for “Best Project for Multimedia” in the SourceForge Community Choice awards.

If you just want to download it, here are some handy links now that it’s been censored by SourceForge: LKCL mininova/TOR.