dora/node-hub/opencv-video-capture/README.md

• Dora Node for capturing video with OpenCV
• YAML
• Inputs
• Outputs
• • License

Dora Node for capturing video with OpenCV

This node is used to capture video from a camera using OpenCV.

YAML

- id: opencv-video-capture
  build: pip install ../../node-hub/opencv-video-capture
  path: opencv-video-capture
  inputs:
    tick: dora/timer/millis/16 # try to capture at 60fps
  outputs:
    - image: # the captured image

  env:
    PATH: 0 # optional, default is 0

    IMAGE_WIDTH: 640 # optional, default is video capture width
    IMAGE_HEIGHT: 480 # optional, default is video capture height

Inputs

• tick: empty Arrow array to trigger the capture

Outputs

• image: an arrow array containing the captured image

image: {
    "width": np.uint32,
    "height": np.uint32,
    "encoding": str,
    "data": np.array  # flattened image data
}

encoded_image = pa.array([image])

decoded_image = {
    "width": np.uint32(encoded_image[0]["width"]),
    "height": np.uint32(encoded_image[0]["height"]),
    "encoding": encoded_image[0]["encoding"].as_py(),
    "data": encoded_image[0]["data"].values.to_numpy().astype(np.uint8)
}

License

This project is licensed under Apache-2.0. Check out NOTICE.md for more information.