Feeding NV12 into openCV2

Robotics & Edge Computing Jetson & Embedded Systems Jetson Xavier NX
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Hi,
Please refer to this python sample:

It sends I420 to appsink, but NV12 should work. It is listed in OpenCV code:
https://github.com/opencv/opencv/blob/master/modules/videoio/src/cap_gstreamer.cpp

    // we support 11 types of data:
    //     video/x-raw, format=BGR   -> 8bit, 3 channels
    //     video/x-raw, format=GRAY8 -> 8bit, 1 channel
    //     video/x-raw, format=UYVY  -> 8bit, 2 channel
    //     video/x-raw, format=YUY2  -> 8bit, 2 channel
    //     video/x-raw, format=YVYU  -> 8bit, 2 channel
    //     video/x-raw, format=NV12  -> 8bit, 1 channel (height is 1.5x larger than true height)
    //     video/x-raw, format=NV21  -> 8bit, 1 channel (height is 1.5x larger than true height)
    //     video/x-raw, format=YV12  -> 8bit, 1 channel (height is 1.5x larger than true height)
    //     video/x-raw, format=I420  -> 8bit, 1 channel (height is 1.5x larger than true height)
    //     video/x-bayer             -> 8bit, 1 channel
    //     image/jpeg                -> 8bit, mjpeg: buffer_size x 1 x 1

You can try to modify to NV12 and do NV12 to BGR conversion.