event stream-start: GstEventStreamStart, flags=(GstStreamFlags)GST_STREAM_FLAG_NONE, group-id=(uint)1;
event caps: application/x-rtp, a-framerate=(string)30, clock-rate=(int)90000, encoding-name=(string)H264, media=(string)video, packetization-mode=(string)1, payload=(int)96, profile=(string)constrained-baseline, profile-level-id=(string)42c028;
event eos: (no structure)
