使用OpenCV看视频

import cv2

# video = cv2.VideoCapture("rtsp://192.168.0.200:554/av0_0")
video = cv2.VideoCapture("fire.mp4")
# 获取视频帧数
frame_count = int(video.get(cv2.CAP_PROP_FRAME_COUNT))
# 获取fps，每秒传输帧数（Frames per second）
fps = int(round(video.get(cv2.CAP_PROP_FPS)))
# 分辨率-宽度
width = int(video.get(cv2.CAP_PROP_FRAME_WIDTH))
# 分辨率-高度
height = int(video.get(cv2.CAP_PROP_FRAME_HEIGHT))
print(f'视频帧数：{frame_count}')
print(f'FPS：{fps}')
print(f'Width：{width}')
print(f'Height：{height}')

# delay表示延迟多少毫秒进入下一帧
delay = int(1000 / fps)
while video.isOpened():
    # ret是布尔值，如果读取帧是正确的则返回True，如果文件读取到结尾，它的返回值就为False。frame是每一帧的图像，是个三维矩阵。
    ret, frame = video.read()
    if frame is None:
        break
    if ret == True:
        cv2.imshow("result", frame)
    # waitKey(delay):表示一帧等待delay毫秒在进入下一帧，期间如果有按键按下返回的值就是按下按键的ASCII值; 27 = esc; & 0xFF只是为了排除键盘上其他按键的干扰
    if cv2.waitKey(delay) & 0xFF == 27:
        break

# 释放视频
video.release()
cv2.destroyAllWindows()