Jetson TX2 Gstreamer V4L2 flow


I want to know the flow that use Gstreamer and v4l2 plugin to capture video stream.Now, i have two questions:

1.Is (tegra_multimedia_api\samples\12_camera_v4l2_cuda) provide for customer develop their ower apps, not for gstreamer. So, if i use (gst-launch-1.0 v4l2src device=/dev/video0 …) command to capture video stream, the flow don’t enter 12_camera_v4l2_cuda. is it right?
2.(gst-launch-1.0 v4l2src device=/dev/video0 …) This process is similar to the following:
open /dev/video0, format, capbility, stream on, qbuf/dbuf?


For V4l2 sources, you can follow the steps in

And we have a new plugin nvv4l2camerasrc in r32.4.2. It is open source in

It is similar to 12_camera_v4l2_cuda and shall bring better performance. Please download it and try.