Draft: v4l2h264enc: Extended controls support for H264 encoder

Sidraya Jayagond requested to merge Sidraya/gst-plugins-good:master into master

There used to be some extended controls such as video bitrate, gopsize and iperiod for H264 encoder.

Note:The extended controls support changes has been tested on TI J7 board with gstreamer version 1.18.4

Merge request reports