saving an image sequence from video using opencv2

Question

Newbie question and yes I have spent a lot of time sifting through similar questions and Answers with no luck.

What I am trying to do is save frames from a video fil

Answer 1

This is my way to do in Python3.0. Have to have CV2 3+ version for it to work. This function saves images with frequency given.

import cv2
import os
print(cv2.__version__)

# Function to extract frames 
def FrameCapture(path,frame_freq): 

    # Path to video file 
    video = cv2.VideoCapture(path) 
    success, image = video.read()

    # Number of frames in video
    fps = int(video.get(cv2.CAP_PROP_FPS))
    length = int(video.get(cv2.CAP_PROP_FRAME_COUNT))

    print('FPS:', fps)
    print('Extracting every {} frames'.format(frame_freq))
    print('Total Frames:', length)
    print('Number of Frames Saved:', (length // frame_freq) + 1)

    # Directory for saved frames
    try:
        frame_dir = path.split('.')[0]
        os.mkdir(frame_dir)
    except FileExistsError:
        print('Directory ({}) already exists'.format(frame_dir))

    # Used as counter variable 
    count = 0

    # checks whether frames were extracted 
    success = 1

    # vidObj object calls read 
    # function extract frames 

    while count < length :
        video.set(cv2.CAP_PROP_POS_FRAMES , count)
        success, image = video.read()
        # Saves the frames with frame-count 
        cv2.imwrite(frame_dir + "/frame%d.jpg" % count, image)
        count = count + frame_freq