使用python和opencv打开摄像头并保存视频

使用python和opencv打开摄像头并保存视频

代码：

def saveVideo():
    video = cv2.VideoCapture(0)  # 调用摄像头，PC电脑中0为内置摄像头，1为外接摄像头
    judge = video.isOpened()  # 判断video是否打开
    frame_size = (int(video.get(3)), int(video.get(4)))  # 获取摄像头分辨率

    FPS = video.get(5)  # 获取摄像头帧率
    print("FPS: ", FPS)

    # 保存视频
    code = cv2.VideoWriter_fourcc('M', 'J', 'P', 'G')  # 编码格式
    fps = 25  # 保存视频的帧率
    filename = "video.avi"  # 保存视频的路径和名字
    out = cv2.VideoWriter(filename, code, fps, frame_size, isColor=True)  # 保存视频的视频流

    if not (out.isOpened()):  # 判断视频流是否创建成功
        print('out is not opened')

    while judge:
        ret, frame = video.read()
        out.write(frame)  # 将图像写入视频流，生成视频
        cv2.imshow('frame', frame)
        if cv2.waitKey(1) == ord('q'):
        	print('录制结束，视频文件已经保存到当前目录下')
            break

    # 释放窗口和视频流
    video.release()
    out.release()
    cv2.destroyAllWindows()


if __name__ == '__main__':
    saveVideo()