extracting frames from video

Question

I am trying to extract frames from video, i am using this code:

import cv2
vidcap = cv2.VideoCapture('video_01.mp4')
success,image = vidcap.read()
count = 0
success = True
while success:
  success,image = vidcap.read()
  print('Read a new frame: ', success)
  cv2.imwrite("frame%d.jpg" % count, image)     # save frame as JPEG file
  count += 1

This returns

Read a new frame: False

Ihave followed various posts about this in SO. I installed ffmepg, av but nothing works.

I am running it on windows, installed opencv via Anaconda.

What is workaround for this? Thanks for help

I also tried

import cv2
import numpy as np
import os

# Playing video from file:
cap = cv2.VideoCapture('example.mp4')

try:
    if not os.path.exists('data'):
        os.makedirs('data')
except OSError:
    print ('Error: Creating directory of data')

currentFrame = 0
while(True):
    # Capture frame-by-frame
    ret, frame = cap.read()

    # Saves image of the current frame in jpg file
    name = './data/frame' + str(currentFrame) + '.jpg'
    print ('Creating...' + name)
    cv2.imwrite(name, frame)

    # To stop duplicate images
    currentFrame += 1

# When everything done, release the capture
cap.release()
cv2.destroyAllWindows()

However this saves empty images

Possible duplicate : https://stackoverflow.com/questions/33311153/python-extracting-and-saving-video-frames — innicoder, Mar 28 '18 at 16:47
Possible duplicate of [Python - Extracting and Saving Video Frames](https://stackoverflow.com/questions/33311153/python-extracting-and-saving-video-frames) — innicoder, Mar 28 '18 at 16:47
Oh, I do apologize then you need an alternative way. How come that it saves empty files, does it read it properly that's the question? Does it support the filetype and is the encoding of the file same. — innicoder, Mar 28 '18 at 16:49
i tried mp4 or mpeg. I am not sure how i can test if it read the video properly — Darlyn, Mar 28 '18 at 17:27
Did you download the same video from the answer in the post @ElvirMuslic shared? You need to make sure the video is in the same folder as the python script. — fireant, Mar 30 '18 at 00:25

score 0 · Answer 1 · answered Jul 07 '20 at 08:08

0

How about change while loop in second code (15th line) to this

while(cap.isOpened()):

from

while(True):

answered Jul 07 '20 at 08:08

puhuk

464
5
15

score -1 · Answer 2 · answered Mar 14 '19 at 06:35

-1

It seems your code has no problem, please try to run this command:

pip install opencv-python

answered Mar 14 '19 at 06:35

Sahli Simo

85
2
7

extracting frames from video

2 Answers2