I think kasabali was talking about x264 (https://www.videolan.org/developers/x264.html https://www.videolan.org/developers/x264.html) and x265 (http://x265.org/

I think kasabali was talking about x264 (https://www.videolan.org/developers/x264.html https://www.videolan.org/developers/x264.html) and x265 (http://x265.org/ http://x265.org/) specifically rather than the H.264 and H.265 video formats in general.