event stream-start: GstEventStreamStart, flags=(GstStreamFlags)GST_STREAM_FLAG_NONE, group-id=(uint)1;
event caps: video/x-h264, framerate=(fraction)30/1, height=(int)240, level=(string)4, profile=(string)constrained-baseline, stream-format=(string)avc, width=(int)320;
event eos: (no structure)
