CNET spotted Google has removed an opensource project called CoreAVC-for-Linux from its Google Code website after it received a DMCA complaint:
CoreAVC itself is proprietary software for Windows supplied by a company called CoreCodec. The software can play video encoded with the H.264 standard.
According to a cached version of the Google Code page, CoreAVC-for-Linux provides patches to open-source media player software such as MPlayer or MythTV that enable them to use the CoreAVC software on Linux. In other words, it's for programs that connect to the CoreAVC software but doesn't actually include CoreAVC itself.