Read ip camera stream video on python using opencv3

Question

I installed opencv3 installation link on my raspberrypi 3 and i've tested this, everything is ok, but when i try to read the ipcamera video stream encountered this error

self.stream = cv2.VideoCapture("rtsp://*:*@{}:525/stream2".format(ip_camera_address)) 

 'NoneType' object has no attribute '__array_interface__'

Reading the webcam with the usb interface and everything is ok

I think my problem is in ffmpeg library, I try to install this library but it won't fix.

• Jaromanda X: I take it *:*@{} is a place-holder for a valid user:pass@host
• Hamed: This is just an example. I used the user and password

Answer 1

if you need run USBcam

import cv2 
cap = cv2.VideoCapture(0)
while(True):
 ret, frame = cap.read()
 cv2.imshow('frame',frame)
 if cv2.waitKey(1) & 0xFF == ord('q'):
 break
cap.release()
cv2.destroyAllWindows()

if you need run IPcam

import cv2 
cap = cv2.VideoCapture('rtsp://username:[email protected]/1')
while(True):
 ret, frame = cap.read()
 cv2.imshow('frame',frame)
 if cv2.waitKey(1) & 0xFF == ord('q'):
 break
cap.release()
cv2.destroyAllWindows()

• Hamed: It is a true method for read video stream at IP camera, But my problem is fix ffmpeg in openCV ,My sintex is true because I have tested this on my PC, But this does not work properly on raspberry
• UM Igor: This is often and I had something working on the PC but it does not work on raspberries, try gstreamer

Answer 2

I install opencv again [best link for install this] and i try to install FFmpeg from repository. affter installation of ffmepg i tried to read ipcamera video stream with this script

Note : after finshing opencv cmake, FFmpeg subitems most all get YES.

enter image description here

self.stream = cv2.VideoCapture("rtsp://user:password@{}:525/stream2".format(ip_camera_address))

And It worked successfully.

This tutorial help me to install ffmpeg on raspberry pi link

Answer 3

First check your camera providers correct address format:

I used Dahua IPC-HFW2231S camera

Take a look to correct structure https://www.camera-sdk.com/p_6658-how-to-connect-to-your-dahua-ip-camera-onvif.html

Examples to my camera https://dahuawiki.com/Remote_Access/RTSP_via_VLC

And the working code below. subtype (Sub stream) can be changed between main stream and sub stream.

cap=cv2.VideoCapture('rtsp://admin:[email protected]:554//cam/realmonitor?channel=1&subtype=1')

• Seamus: Please take a moment to review Markdown formatting.