How to skip a video in an nth increment in OpenCV-CodePudding

I've been reading OpenCV documentation about reading and skipping on a video using trackbar, for example 10, the video will play at 10s, 20s, 30s...n. But I can't seem to implement it on the right way using Python. I just want to ask for your suggestion of an algorithm. If any, some snippets. Thank you.

CodePudding user response：

I'm have understood your comment This is code to show just every 10s 20s etc..

import cv2

cap = cv2.VideoCapture('../folder/' video_name)

num_frames = int(cap.get(cv2.CAP_PROP_FRAME_COUNT))
fps = cap.get(cv2.CAP_PROP_FPS)

### loop over video and show
for i in range(num_frames):
          ret_prev, frame = cap.read()


      ### this we show every 10s other will be skip
          if i % fps*10:
            cv2.imshow('frame',frame)
            cv2.waitKey(0)

CodePudding user response：

You can make loop over video files and open every video[i] with step like in this code

import cv2

video_files = os.listdir(folder)

step = 10    ## every 5 video

### loop over videos show every 10..
for i in range(0,100, step):

     video_name = video_files[i]
     cap = cv2.VideoCapture('../folder/' video_name)

     num_frames = int(cap.get(cv2.CAP_PROP_FRAME_COUNT))

     ### loop over video and show
     for i in range(num_frames):
          ret_prev, frame = cap.read()
          cv2.imshow('frame',frame)
          cv2.waitKey(0)