Camera capture cannot be performed on the Magic Mirror.

[emrhssla]

I installed openv and python etc in the raspberry pie for camera capture.
So I executed a simple Python code.
test.py:

import cv2

cap = cv2.VideoCapture(0)

ret, frame = cap.read()
cv2.imwrite('chan.jpg',frame)

cap.release()
cv2.destroyAllWindows()
print("1")

Successfully 1(print(“1”) in test.py) was printed and the picture was saved on pi/Desktop.
Then, I deleted the pi/Desktop/chan.jpg.

However, we tried to run test.py with MagicMirror, but failed.

The code for node_helper.js to run test.py is as follows.

var NodeHelper = require("node_helper");
var {PythonShell} = require('python-shell');
var socketTestpython;
module.exports = NodeHelper.create({
  start: function() {
    socketTestpython=this;
    console.log(this.name+"node_helper started")
  },
  
  socketNotificationReceived: function(notification, payload) {
    switch(notification) {
      case "TEST":
        console.log("notification : " + notification)
	    PythonShell.run('/home/pi/Desktop/test.py', null, function (err, result) {
            if (err) throw err;
            console.log(result);          
            socketTestpython.sendSocketNotification("I_DID",result);
          });
	       
        break
    }
  }
})

print(“1”) in test.py
‘1’ was successfully outputed on the console as follows:
But as you can see in the image, there is no capture picture file on the desktop.

What is the problem?
I didn’t do anything on npm install about openv.
Is there anything I should install in the magic mirror?
For example, should I do npm install opencv4nodejs?

[Sean]

@emrhssla
Your image might be saved in MagicMirror directory. Have you checked?

[sdetweil]

@emrhssla said in Camera capture cannot be performed on the Magic Mirror.:

cv2.imwrite(‘chan.jpg’,frame)

i agree with sean… u need to be specific in your python script WHERE u write the file… here it defaults to the current directory at the time (which is NOT where the script is located)

maybe like this

cv2.imwrite('/home/pi/Desktop/chan.jpg',frame)

[emrhssla]

@sdetweil thank you!

[emrhssla]

@Sean thank you!