OpenCV：重新连接断开连接的摄像头源的代码工作正常，但在前端捕获的视频帧未加载

Question

我写了这个简单的 python 代码来重新连接我的系统所连接的 IP 摄像头，以防摄像头断开连接。

import numpy as np
import cv2
import time

def work_with_captured_video():
    while True:
        ret, frame = camera.read()
        if not ret:
            print("Camera is disconnected!")
            camera.release()
            return False
            break
        else:
            cv2.imshow('frame', frame)
            return True
        if cv2.waitKey(1) & 0xFF == ord('q'):
            break

while True:
    camera = cv2.VideoCapture('rtsp://<ip specific to my camera>')
    if camera.isOpened():
        print('Camera is connected')
        #call function
        response = work_with_captured_video()
        if response == False:
            time.sleep(10)
            continue
    else:
        print('Camera not connected')
        camera.release()
        time.sleep(10)
        continue

我可以说代码工作正常，相机在断开一段时间后正在重新连接。因为在日志中，我可以按预期看到打印语句（我将其放入我的代码中以检查连接状态）

请看附件图片：

面临的问题：

1.Although 我编写了代码 cv2.imshow 来查看视频源，但我无法看到任何视频源。

正在加载空白 window

从键盘按下 'q' 后，视频源没有停止（更具体地说，在我的情况下：空白 window 没有关闭），尽管为此编写了代码

注意：我正在使用 Ubuntu (CPU) ，但我也尝试了运行来自 Windows 系统的代码，但也只有一个空白 window 正在加载，但未显示捕获的任何视频帧。更多内容：

在 windows 系统中，我可以看到一条错误通知：'python stopped working'

我的疑问是：如果 python 会停止工作，那么代码的其余部分将如何执行，我看到的消息如下：'disconnected'..'Connected'等如预期？

如果您能提出任何建议来解决问题，那将会很有帮助。

提前致谢！

Answer 1

Video feed is not getting stopped(more specifically in my case: that blank window is not going off) upon pressing 'q' from keyboard, although there is code written for this

def work_with_captured_video():
while True:
    ret, frame = camera.read()
    if not ret:
        print("Camera is disconnected!")
        camera.release()
        return False
        break
    else:
        cv2.imshow('frame', frame)
        return True # Here You are returning the status.
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break

在函数中，work_with_captured_video()，您在 cv2.waitKey(1) 之前 return 状态为 True。这基本上应该是这样的，

def work_with_captured_video():
    while True:
        ret, frame = camera.read()
        if not ret:
            print("Camera is disconnected!")
            camera.release()
            return False
            #break --> Not required.
        else:
            cv2.imshow('frame', frame)

        if cv2.waitKey(1) & 0xFF == ord('q'):
            break
     return True

完成 while 循环后，您将 return 状态为 True。

Although I wrote code cv2.imshow to see the video feed, I am not able to see any video feed.

while True:
    camera = cv2.VideoCapture('rtsp://<ip specific to my camera>')
    if camera.isOpened():
        print('Camera is connected')
        #call function
        response = work_with_captured_video()
        if response == False:
            time.sleep(10)
            continue
    else:
        print('Camera not connected')
        camera.release()
        time.sleep(10)
        continue

请为函数 work_with_captured_video() 提供参数 camera。该函数未由任何参数提供，因此行 if not ret: 具有 ret 变量作为 False。

def work_with_captured_video(camera):
    while True:
        ret, frame = camera.read()
        if not ret:
            print("Camera is disconnected!")
            camera.release()
            return False
        else:
            cv2.imshow('frame', frame)

        if cv2.waitKey(1) & 0xFF == ord('q'):
            break
    return True

while True:
    camera = cv2.VideoCapture('rtsp://<ip specific to my camera>')
    if camera.isOpened():
        print('Camera is connected')
        #call function
        response = work_with_captured_video(camera)
        if response == False:
            time.sleep(10)
            continue
    else:
        print('Camera not connected')
        camera.release()
        time.sleep(10)
        continue

进行这些修改后，您的代码就可以工作了。

OpenCV：重新连接断开连接的摄像头源的代码工作正常，但在前端捕获的视频帧未加载

OpenCV: Code to Reconnect a Disconnected Camera Feed is Working Fine but in the Front End Captured Video Frame is Not getting Loaded

python

opencv

video-streaming

ip-camera