gst-launch-1.0 -e nvarguscamerasrc ! "video/x-raw(memory:NVMM),width=3840,height=2160,framerate=30/1"
! tee name=t ! videoconvert ! autovideosink t. !
nvv4l2h265enc ! h265parse ! mp4mux ! filesink location=rpi_v3_imx477_cam_2.mp4
GStreamer 265编码是调用屏幕显示 存档位置文件大小不变，窗口显示黑屏。