signal callback delegate or function to connect
void callback(gstrtp.rtpheader_extension.RTPHeaderExtension ext, gstrtp.rtpbase_payload.RTPBasePayload rTPBasePayload)
ext the #GstRTPHeaderExtension (optional)
rTPBasePayload the instance the signal is connected to (optional)
Yes.After to execute callback after default handler, No.After to execute before (default)
Signal ID
Connect to AddExtension signal.
Add ext as an extension for writing part of an RTP header extension onto outgoing RTP packets.