Two new GOP control modes, Control software and Gstreamer framework are supported
Control_SW
DEFAULT_GOP_B & PYRAMIDAL_GOP_B: Patterns are identical to DEFAULT_GOP and PYRAMIDAL_GOP except that P frames are replaced with B Pictures.
Gstreamer
Omxh264enc/omxh265enc element gop-mode parameter supports these two new settings from 2019.2 onwards, "basic-b" corresponds to DEFAULT_GOP_B and “pyramidal-b” corresponds to PYRAMIDAL_GOP_B.
Figure 1. DEFAULT_GOP_B and PYRAMIDAL_GOP_B patterns
