import os import time source = './11/2021-4-13-10-41-51.mp4' # 將視頻轉(zhuǎn)成圖片序列后的分辨率 new_width = 224 new_height = 224import mmcv s = time.time() # 讀取視頻 video = mmcv.VideoReader(source) if video is None :print('Warning: unable to open video source: ', source) lll = len(video) for i in range(lll):if video[i] is not None:# 改變圖片分辨率if new_width>0 and new_height>0:out_img = mmcv.imresize(video[i], (new_width,new_height))else:out_img = video[i]mmcv.imwrite(out_img, os.path.join('out_dir','img_%05d.jpg'%i))else:warnings.warn('Length inconsistent!'f'Early stop with {i + 1} out of {len(vr)} frames.')break e = time.time() print(e-s) # 2.1249728202819824 2.2611641883850098 2.648266315460205 2.231487512588501import cv2 s = time.time() # opencv版本的視頻轉(zhuǎn)圖像序列 cap = cv2.VideoCapture(source) if cap is None or not cap.isOpened():print('Warning: unable to open video source: ', source) i = 0 while True:ret, img = cap.read()if ret == False:breakif img is not None:# 改變圖片分辨率if new_width>0 and new_height>0:out_img = cv2.resize(img, (new_width,new_height))else:out_img = imgcv2.imwrite(os.path.join('out_dir','img_%05d.jpg'%i), out_img)else:warnings.warn('Length inconsistent!'f'Early stop with {i + 1} out of {len(vr)} frames.')breaki += 1 e = time.time() print(e-s) # 1.9834942817687988 2.1920833587646484 2.027904987335205 2.0143558979034424

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熱運(yùn)行多次（這里只記錄了4次），綜合來(lái)開(kāi)，cv2速度是更快的，大約平均快 0.3s +

環(huán)境：windows10、EditPlus5.0、python3.7.6、mmcv1.3.1、open-cv4.4.0.46

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與50位技術(shù)專(zhuān)家面對(duì)面20年技術(shù)見(jiàn)證，附贈(zèng)技術(shù)全景圖

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