RTPBaseDepayload.dropped

Called from GstRTPBaseDepayload.process or GstRTPBaseDepayload.process_rtp_packet if the depayloader does not use the current buffer for the output buffer. This will either drop the delayed buffer or the last buffer from the header extension cache.

A typical use-case is when the depayloader implementation is dropping an input RTP buffer while waiting for the first keyframe.

Must be called with the stream lock held.