DepthAI OAK stop/start video streaming from ColorCamera node

depthai_pause_continue_streaming.py

#!/usr/bin/env python3

import depthai as dai
import cv2

# Create pipeline
pipeline = dai.Pipeline()

# Define sources and outputs
camRgb = pipeline.create(dai.node.ColorCamera)

controlIn = pipeline.create(dai.node.XLinkIn)
controlIn.setStreamName('control')
controlIn.out.link(camRgb.inputControl)

# Linking
ispOut = pipeline.create(dai.node.XLinkOut)
ispOut.setStreamName('isp')
camRgb.isp.link(ispOut.input)

# Connect to device and start pipeline
with dai.Device(pipeline) as device:
    controlQueue = device.getInputQueue('control')
    ispQueue = device.getOutputQueue('isp')

    while True:
        vidFrames = ispQueue.tryGetAll()
        for vidFrame in vidFrames:
            cv2.imshow('video', vidFrame.getCvFrame())

        # Update screen (1ms pooling rate)
        key = cv2.waitKey(1)
        if key == ord('q'):
            break
        elif key == ord('s'):
            print("setStopStreaming")
            ctrl = dai.CameraControl()
            ctrl.setStopStreaming()
            ctrl.setAutoFocusMode(dai.CameraControl.AutoFocusMode.CONTINUOUS_VIDEO)
            controlQueue.send(ctrl)
        elif key == ord('c'):
            print("Continue streaming")
            ctrl = dai.CameraControl()
            ctrl.setStartStreaming()
            ctrl.setAutoFocusMode(dai.CameraControl.AutoFocusMode.CONTINUOUS_VIDEO)
            controlQueue.send(ctrl)