The repeat_headers parameter is currently hard-coded to false and can
not be changed.
For mpegts container and allow better compatibility with broadcast
mpegts decoders, it is mandatory to repeat the sps/pps headers
regularly.
This commit enables this parameter to be set either by the user or the
service (ex: udp or srt w/ mpegts container).
The b_annexb enables compatibility with Annex B bitstream which is
better for streaming formats than avcc.
915379a99d