[Fixed]-Opencv Live Stream from camera in Django Webpage

by

25👍

The solution for the above problem was something like this :

views.py

from django.views.decorators import gzip
from django.http import StreamingHttpResponse
import cv2
import threading

class VideoCamera(object):
    def __init__(self):
        self.video = cv2.VideoCapture(0)
        (self.grabbed, self.frame) = self.video.read()
        threading.Thread(target=self.update, args=()).start()

    def __del__(self):
        self.video.release()

    def get_frame(self):
        image = self.frame
        _, jpeg = cv2.imencode('.jpg', image)
        return jpeg.tobytes()

    def update(self):
        while True:
            (self.grabbed, self.frame) = self.video.read()


def gen(camera):
    while True:
        frame = camera.get_frame()
        yield(b'--frame\r\n'
              b'Content-Type: image/jpeg\r\n\r\n' + frame + b'\r\n\r\n')


@gzip.gzip_page
def livefe(request):
    try:
        cam = VideoCamera()
        return StreamingHttpResponse(gen(cam), content_type="multipart/x-mixed-replace;boundary=frame")
    except:  # This is bad! replace it with proper handling
        pass

And then in urls.py map this to a url.

👤Aniket Maithani

1👍

I modified the code by Aniket Maithani to display it in certain img source.

camera.py

class VideoCamera(object):
    def __init__(self):
        self.video = cv2.VideoCapture(0)
        (self.grabbed, self.frame) = self.video.read()
        threading.Thread(target=self.update, args=()).start()

    def __del__(self):
        self.video.release()

    def get_frame(self):
        image = self.frame
        _, jpeg = cv2.imencode('.jpg', image)
        return jpeg.tobytes()

    def update(self):
        while True:
            (self.grabbed, self.frame) = self.video.read()

def gen(camera):
while True:
    frame = camera.get_frame()
    yield(b'--frame\r\n'
          b'Content-Type: image/jpeg\r\n\r\n' + frame + b'\r\n\r\n')

views.py

from camera import *

@gzip.gzip_page
def livefe(request):
    try:
        cam = VideoCamera()
        return StreamingHttpResponse(gen(cam), content_type="multipart/x-mixed-replace;boundary=frame")
    except:  # This is bad!
        pass

def index(request, *args, **kwargs):
    return render(request, 'index.html')

urls.py

from django.urls import path
from .views import *

urlpatterns = [
    path('', index),

        # 'livefe' -> function from views
        # 'live_camera' -> name at index.html>img src="{% url 'live_camera' %}
        path('/camera', livefe, name="live_camera"),
    ]

index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>WebCamera</title>
</head>
<body>
    <div>
        <img src="{% url 'live_camera' %}">
    </div>
</body>
</html>
👤Bianca Emi

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