El Bruno

Hi !

Today, during my [Let’s setup a Raspberry Pi and a reTerminal as an Azure IoT ☁️ device] session, one of the questions was about what cool scenarios we can run once we have a Raspberry Pi as an Azure IoT Edge device.

Besides the use of Cognitive Services (only for x64), a cool and fast idea can be to convert your RPi to a RTSP Cam device. We only need to connect a USB WebCam to the Raspberry Pi.

Once the USB Camera is connected, we need to add the following Edge Module to the device configuration

More information: RTSP Webcam

The module runs as a IoT Edge container named RtspWebCam. While running the container image, one must map the USB camera on the host device to the container by using the following module createOptions parameters: PathOnHost=/dev/video0, PathInContainer=/dev/video0.

Once we add the module, we can see the module running in the device:

And, we will have access to a RTSP Camera. And we can run a sample python app to have the view from the camera.

Sample Code

	# Copyright (c) 2022
	# Author : Bruno Capuano
	# Create Time : 2022 July
	# Change Log :
	# – Open the camera feed from a RTSP address
	#
	# The MIT License (MIT)
	#
	# Permission is hereby granted, free of charge, to any person obtaining a copy
	# of this software and associated documentation files (the "Software"), to deal
	# in the Software without restriction, including without limitation the rights
	# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	# copies of the Software, and to permit persons to whom the Software is
	# furnished to do so, subject to the following conditions:
	#
	# The above copyright notice and this permission notice shall be included in
	# all copies or substantial portions of the Software.
	#
	# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
	# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
	# THE SOFTWARE.
	import time
	import cv2
	# Camera Settings
	camera_Width = 640
	camera_Heigth = 480
	frameSize = (camera_Width, camera_Heigth)
	video_capture = cv2.VideoCapture("rtsp://rpiDev12:8554/stream1")
	time.sleep(1.0)
	while True:
	ret, frameOrig = video_capture.read()
	frame = cv2.resize(frameOrig, frameSize)
	cv2.imshow('@elbruno – Azure IoT Edge Camera', frame)
	# key controller
	key = cv2.waitKey(1) & 0xFF
	if key == ord("q"):
	break
	video_capture.release()
	cv2.destroyAllWindows()

view raw OpenCameraFromRTSP.py hosted with ❤ by GitHub