python视频流截图（按帧数）

一、安装opencv计算机视觉库

pip install opencv-python

二、视频流截图

1、读取视频文件，获取视频帧数

import cv2
# 视频位置
video_path = path_file_name
# 读取视频
cap = cv2.VideoCapture(video_path)
# 获取视频总帧数
frame_count = cap.get(cv2.CAP_PROP_FRAME_COUNT)

2、循环遍历帧率，并保存截图

while cap.isOpened():cap.set(cv2.CAP_PROP_POS_MSEC, flag)cap.set(cv2.CAP_PROP_POS_FRAMES, start_frame)ret, img = cap.read()cv2.waitKey(2000)cv2.imwrite((image_path + "image2/{}.jpg").format(flag), img)flag += 1start_frame += frame_intervalif start_frame >= frame_count:break

3、全部代码

import cv2def main(path_file_name):# 视频位置video_path = path_file_name# 读取视频cap = cv2.VideoCapture(video_path)# 获取视频总帧数frame_count = cap.get(cv2.CAP_PROP_FRAME_COUNT)# 截图时帧的间距，这里10是要等间距截取10张图 # 帧数# frame_interval = int(frame_count // 10)frame_interval = 90# 起始截取帧位置start_frame = 1# 截图存储位置image_path = ""flag = 0while cap.isOpened():cap.set(cv2.CAP_PROP_POS_MSEC, flag)cap.set(cv2.CAP_PROP_POS_FRAMES, start_frame)ret, img = cap.read()cv2.waitKey(2000)cv2.imwrite((image_path + "image2/{}.jpg").format(flag), img)flag += 1start_frame += frame_intervalif start_frame >= frame_count:breakcap.release()cv2.destroyAllWindows()if __name__ == '__main__':# 视频地址file_name = "视频链接"main(file_name)