There is an NXP community user guide for gstreamer available here:

Taking a picture

To take a picture on your NavQ using GStreamer, run the following command:

$ gst-launch-1.0 -v v4l2src num-buffers=1 ! jpegenc ! filesink location=capture1.jpeg

To take video, you can run the following pipeline:

$ gst-launch-1.0 v4l2src ! 'video/x-raw,width=1920,height=1080,framerate=30/1' ! vpuenc_h264 ! avimux ! filesink location='/home/navq/video.avi'

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