https://mailman.videolan.org/pipermail/x264-devel/2008-June/004639.html
[x264-devel] rate control for static macroblocks
rate controldevelstaticmacroblocks
https://www.ietf.org/archive/id/draft-ietf-avt-rtp-h264-params-01.html
Parameters for Static Macroblocks and Aspect Ratio in the RTP Payload Format for H.264 Video
Parameters for Static Macroblocks and Aspect Ratio in the RTP Payload Format for H.264 Video