Multi-stream rtsp GStreamer + Opencv

[Jeffli]

enable-low-outbuffer is property of the gst-omx decoder plugin which is removed will increase the decode buffer, I guess. so maybe can alleviate the frame-rate mismatch(input>output).
for higher cpu usage ,see here

hight cpu usage problem with nvcompositor

Hi I used nvcompositor and nvoverlaysink to composit 4 upd streams(1920x1080pixs 30fps) for 4k display .CPU usage was 230% for 4 cores and fps was down to 5. I checked cpu usage using top command. gst-launch-1.0 nvcompositor name=comp \ sink_0::xpos=0 sink_0::ypos=0 sink_0::width=1920 sink_0::height=1080 \ sink_1::xpos=1920 sink_1::ypos=0 sink_1::width=1920 sink_1::height=1080 \ sink_2::xpos=0 sink_2::ypos=1080 sink_2::width=1920 sink_2::height=1080…