python opencv读取视频分帧_Python OpenCV实现视频分帧

# coding=utf-8

import os

import cv2

videos_src_path = "/home/wgp/视频/"

video_formats = [".MP4", ".MOV"]

frames_save_path = "/home/wgp/视频/"

width = 320

height = 240

time_interval = 50

def video2frame(video_src_path, formats, frame_save_path, frame_width, frame_height, interval):

"""

将视频按固定间隔读取写入图片

:param video_src_path: 视频存放路径

:param formats:　包含的所有视频格式

:param frame_save_path:　保存路径

:param frame_width:　保存帧宽

:param frame_height:　保存帧高

:param interval:　保存帧间隔

:return:　帧图片

"""

videos = os.listdir(video_src_path)

def filter_format(x, all_formats):

if x[-4:] in all_formats:

return True

else:

return False

videos = filter(lambda x: filter_format(x, formats), videos)

for each_video in videos:

print "正在读取视频：", each_video

each_video_name = each_video[:-4]

os.mkdir(frame_save_path + each_video_name)

each_video_save_full_path = os.path.join(frame_save_path, each_video_name) + "/"

each_video_full_path = os.path.join(video_src_path, each_video)

cap = cv2.VideoCapture(each_video_full_path)

frame_index = 0

frame_count = 0

if cap.isOpened():

success = True

else:

success = False

print("读取失败!")

while(success):

success, frame = cap.read()

print "---> 正在读取第%d帧:" % frame_index, success

if frame_index % interval == 0:

resize_frame = cv2.resize(frame, (frame_width, frame_height), interpolation=cv2.INTER_AREA)

# cv2.imwrite(each_video_save_full_path + each_video_name + "_%d.jpg" % frame_index, resize_frame)

cv2.imwrite(each_video_save_full_path + "%d.jpg" % frame_count, resize_frame)

frame_count += 1

frame_index += 1

cap.release()

if __name__ == '__main__':

video2frame(videos_src_path, video_formats, frames_save_path, width, height, time_interval)