event stream-start: GstEventStreamStart, flags=(GstStreamFlags)GST_STREAM_FLAG_NONE, group-id=(uint)1;
event caps: video/x-h264, height=(int)50, width=(int)50;
event segment: format=TIME, start=1000:00:00.000000000, offset=0:00:00.000000000, stop=none, time=0:00:00.000000000, base=0:00:00.000000000, position=1000:00:00.000000000
buffer: content-id=0, dts=1000:00:00.000000000, pts=1000:00:00.000000000, dur=0:00:00.033333333, flags=discont marker
event eos: (no structure)
