just show opencv video, not preview

opencv_video.py

@@ -9,13 +9,10 @@ pipeline = dai.Pipeline()
 # Define source and outputs
 camRgb = pipeline.createColorCamera()
 xoutVideo = pipeline.createXLinkOut()
-xoutPreview = pipeline.createXLinkOut()
 
 xoutVideo.setStreamName("video")
-xoutPreview.setStreamName("preview")
 
 # Properties
-camRgb.setPreviewSize(300, 300)
 camRgb.setBoardSocket(dai.CameraBoardSocket.RGB)
 camRgb.setResolution(dai.ColorCameraProperties.SensorResolution.THE_1080_P)
 camRgb.setInterleaved(True)
@@ -23,22 +20,17 @@ camRgb.setColorOrder(dai.ColorCameraProperties.ColorOrder.BGR)
 
 # Linking
 camRgb.video.link(xoutVideo.input)
-camRgb.preview.link(xoutPreview.input)
 
 # Connect to device and start pipeline
 with dai.Device(pipeline) as device:
 
     video = device.getOutputQueue('video')
-    preview = device.getOutputQueue('preview')
 
     while True:
         videoFrame = video.get()
-        previewFrame = preview.get()
 
         # Get BGR frame from NV12 encoded video frame to show with opencv
         cv2.imshow("video", videoFrame.getCvFrame())
-        # Show 'preview' frame as is (already in correct format, no copy is made)
-        cv2.imshow("preview", previewFrame.getFrame())
 
         if cv2.waitKey(1) == ord('q'):
             break