如何使用python在线程中运行多个摄像头

发布于08月21日

下面是我使用多线程池并行播放多个视频的代码.但每个输入只播放一段视频.我希望每个视频单独打开.不组合

import concurrent.futures

RTSP_URL = "rtsp://wowzaec2demo.streamlock.net/vod/mp4:BigBuckBunny_115k.mp4"
RTSP_List = [RTSP_URL, RTSP_URL, RTSP_URL, RTSP_URL]


def url_to_video(url):
    video = cv2.VideoCapture(url)
    while True:
        _, frame = video.read()
        cv2.imshow("RTSP", frame)
        k = cv2.waitKey(1)
        if k == ord('q'):
            break
    video.release()
    cv2.destroyAllWindows()


while True:
    with concurrent.futures.ThreadPoolExecutor() as executor:
        executor.map(url_to_video, RTSP_List)```

how to play each video separately.

推荐答案

你只需要每个线程为cv2.imshow中的窗口使用不同的名称，这样每个线程就会生成一个不同的窗口，你应该把它们放在不同的地方，这样它们就不会一个一个地出现在另一个窗口上，我只是在它们上面添加了index，这样每个不同的index将在屏幕上有一个位置和不同的标题，而且当一个窗口完成时，你不应该销毁所有的窗口……

import concurrent.futures
import cv2
RTSP_URL = "rtsp://wowzaec2demo.streamlock.net/vod/mp4:BigBuckBunny_115k.mp4"
RTSP_List = [(RTSP_URL,0), (RTSP_URL,1), (RTSP_URL,2), (RTSP_URL,3)]


def url_to_video(tup):
    url,index = tup
    video = cv2.VideoCapture(url)
    while True:
        _, frame = video.read()
        cv2.imshow(f"RTSP {index}", frame)
        cv2.moveWindow(f"RTSP {index}", index*300, 0)
        k = cv2.waitKey(1)
        if k == ord('q'):
            break
    video.release()


while True:
    with concurrent.futures.ThreadPoolExecutor() as executor:
        executor.map(url_to_video, RTSP_List)
    cv2.destroyAllWindows()