我正在使用循环来使用Python和OpenCV访问视频文件的所有帧。访问每个框架时，我在列表中添加了框架的索引。

但是，我比较了列表的大小和使用

Frames = cap.get(cv2.cv.CV_CAP_PROP_FRAME_COUNT)

# -*- coding: utf-8 -*-
import cv2

def faceExtraction(inputFile, extractionRate):

cap = cv2.VideoCapture(inputFile)
fps = cap.get(cv2.cv.CV_CAP_PROP_FPS)
Frames = cap.get(cv2.cv.CV_CAP_PROP_FRAME_COUNT)
print 'Frames='+str(Frames)
# if not os.path.exists("registered_face"):
        # os.makedirs("registered_face")

frame_counter = 0

outputFrameIndices=[]
while(cap.isOpened()):


        frame_counter=frame_counter+1
        ret, frame = cap.read()  # read current frame
        outputFrameIndices.append(frame_counter)
        if frame is None:
                break


        if cv2.waitKey(1) & 0xFF == ord('q'):
                break

            # print 'FACE NOT FOUND: frame '+ str(frame_counter)
# When everything done, release the capture

cap.release()
cv2.destroyAllWindows()



print 'number of frames: ' + str(len(outputFrameIndices))

############## Executing Main App ###########
faceExtraction('Video Filename blah blah',5)

最佳答案

发现错误... Python从零开始启动索引计数器...

https://stackoverflow.com/questions/23919735/