python - How can I open up webcam and process images with docker and OpenCV? -

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i have python script uses opencv , when runs script want process image webcam , give result. how can make it?

this how tried:

my simple test python script:

import cv2 cap = cv2.videocapture(0)  while true:     ret, frame = cap.read()      print ret

this in dockerfile:

from gaborvecsei/opencvinstall  add testcode.py ./testcode.py  #start sample app cmd ["python", "testcode.py"]

after build , run it prints false means not have image webcam.

how can images?

to make cam visible docker container, should pass --device argument when start container.

docker start --device /dev/video0 helloworld:1.0.0

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