Opencv Django網頁中攝像頭直播Stream

Question

我正在 Django 做一個項目。我想在網頁上顯示來自攝像頭的實時提要。 但我不確定如何返回我從 web 頁面上的攝像頭獲得的實時提要。 這是我到目前為止嘗試過但沒有看到任何進展的代碼。

from django.shortcuts import render
from .forms import FaceAdditionForm
import cv2
import numpy as np
from django.http import StreamingHttpResponse

def capture_video_from_cam():
    cap = cv2.VideoCapture(0)
    currentFrame = 0
    while True:

        ret, frame = cap.read()

        # Handles the mirroring of the current frame
        frame = cv2.flip(frame,1)
        currentFrame += 1

def addfaces(request):
    add_faces_form = FaceAdditionForm()
    if add_faces_form.is_valid():
        add_faces_form.save()
    return render(request, 'base.html', {'add_faces': add_faces_form})


def show_video_on_page(request):
    resp = StreamingHttpResponse(capture_video_from_cam())
    return render(request, 'base.html', {'video': resp})

Answer 1

上述問題的解決方案是這樣的：

視圖.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

然后在 urls.py 中將其映射到一個 url。

Answer 2

我修改了 Aniket Maithani 的代碼以在某些 img 源中顯示它。

相機.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')

視圖.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')

網址.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>

Opencv Django網頁中攝像頭直播Stream

問題描述

2 個解決方案

解決方案1
19 2018-04-12 21:04:22

解決方案2
0 2023-01-24 14:47:41

Opencv Django網頁中攝像頭直播Stream

問題描述

2 個解決方案

解決方案1 19 2018-04-12 21:04:22

解決方案2 0 2023-01-24 14:47:41

解決方案1
19 2018-04-12 21:04:22

解決方案2
0 2023-01-24 14:47:41