Call this function after gstrtp.rtpheader_extension.RTPHeaderExtension.read to check if the depayloader's src caps need updating with data received in the last RTP packet.
Whether ext wants to update depayloader's src caps.
Call this function after gstrtp.rtpheader_extension.RTPHeaderExtension.read to check if the depayloader's src caps need updating with data received in the last RTP packet.