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to extract multiple of n images using open cv in python

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3

$begingroup$

I am using opencv module in python to extract sequences of images(frames) from video (from a file)
My code for extracting images from video goes like this.

import cv2 
import os
os.chdir('D:/Python images/videofolder') 
cap = cv2.VideoCapture('D:/Python images/test_videos/testcutvideo1.avi')
cap.isOpened()
success,image = cap.read()
count = 1
success = True
while success:
 success,image = cap.read()
 cv2.imwrite("image%d.jpg" % count, image) # save frame as JPEG file
count += 1

I want my code to select multiple of 'n' images
eg: to select & save multiple of 5 images(to extract multiple of 5) so that I have 5th, 10th, 15th... images.
Please guide me.

python

share|improve this question

asked Mar 1 '18 at 5:10

ManikManik

109213

$endgroup$

bumped to the homepage by Community♦ 41 mins ago

This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.

add a comment | 

3

$begingroup$

I am using opencv module in python to extract sequences of images(frames) from video (from a file)
My code for extracting images from video goes like this.

import cv2 
import os
os.chdir('D:/Python images/videofolder') 
cap = cv2.VideoCapture('D:/Python images/test_videos/testcutvideo1.avi')
cap.isOpened()
success,image = cap.read()
count = 1
success = True
while success:
 success,image = cap.read()
 cv2.imwrite("image%d.jpg" % count, image) # save frame as JPEG file
count += 1

I want my code to select multiple of 'n' images
eg: to select & save multiple of 5 images(to extract multiple of 5) so that I have 5th, 10th, 15th... images.
Please guide me.

python

share|improve this question

asked Mar 1 '18 at 5:10

ManikManik

109213

$endgroup$

bumped to the homepage by Community♦ 41 mins ago

This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.

add a comment | 

$begingroup$

I am using opencv module in python to extract sequences of images(frames) from video (from a file)
My code for extracting images from video goes like this.

import cv2 
import os
os.chdir('D:/Python images/videofolder') 
cap = cv2.VideoCapture('D:/Python images/test_videos/testcutvideo1.avi')
cap.isOpened()
success,image = cap.read()
count = 1
success = True
while success:
 success,image = cap.read()
 cv2.imwrite("image%d.jpg" % count, image) # save frame as JPEG file
count += 1

I want my code to select multiple of 'n' images
eg: to select & save multiple of 5 images(to extract multiple of 5) so that I have 5th, 10th, 15th... images.
Please guide me.

python

share|improve this question

asked Mar 1 '18 at 5:10

ManikManik

109213

$endgroup$

import cv2 
import os
os.chdir('D:/Python images/videofolder') 
cap = cv2.VideoCapture('D:/Python images/test_videos/testcutvideo1.avi')
cap.isOpened()
success,image = cap.read()
count = 1
success = True
while success:
 success,image = cap.read()
 cv2.imwrite("image%d.jpg" % count, image) # save frame as JPEG file
count += 1

share|improve this question

asked Mar 1 '18 at 5:10

ManikManik

109213

share|improve this question

asked Mar 1 '18 at 5:10

ManikManik

109213

asked Mar 1 '18 at 5:10

ManikManik

109213

asked Mar 1 '18 at 5:10

ManikManik

109213

1 Answer
1

active

oldest

votes

0

$begingroup$

You can use the modulo operator to identify multiples of count. Whenever it is a multiple of 5 save the image, otherwise just disregard it and move to the next iteration of the while loop.

Make sure the counter is outside the if statement. It will count every iteration. That is how we will determine if the current image is a multiple of 5.

import cv2 
import os
os.chdir('D:/Python images/videofolder') 
cap = cv2.VideoCapture('D:/Python images/test_videos/testcutvideo1.avi')
cap.isOpened()

count = 0
success = True
while success:
 success,image = cap.read()
 if count % 5 == 0:
 cv2.imwrite("image%d.jpg" % count, image) # save frame as JPEG file
 count += 1

share|improve this answer

answered Mar 1 '18 at 5:32

JahKnowsJahKnows

5,347727

$endgroup$

add a comment | 

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0

$begingroup$

You can use the modulo operator to identify multiples of count. Whenever it is a multiple of 5 save the image, otherwise just disregard it and move to the next iteration of the while loop.

Make sure the counter is outside the if statement. It will count every iteration. That is how we will determine if the current image is a multiple of 5.

import cv2 
import os
os.chdir('D:/Python images/videofolder') 
cap = cv2.VideoCapture('D:/Python images/test_videos/testcutvideo1.avi')
cap.isOpened()

count = 0
success = True
while success:
 success,image = cap.read()
 if count % 5 == 0:
 cv2.imwrite("image%d.jpg" % count, image) # save frame as JPEG file
 count += 1

share|improve this answer

answered Mar 1 '18 at 5:32

JahKnowsJahKnows

5,347727

$endgroup$

add a comment | 

0

$begingroup$

You can use the modulo operator to identify multiples of count. Whenever it is a multiple of 5 save the image, otherwise just disregard it and move to the next iteration of the while loop.

Make sure the counter is outside the if statement. It will count every iteration. That is how we will determine if the current image is a multiple of 5.

import cv2 
import os
os.chdir('D:/Python images/videofolder') 
cap = cv2.VideoCapture('D:/Python images/test_videos/testcutvideo1.avi')
cap.isOpened()

count = 0
success = True
while success:
 success,image = cap.read()
 if count % 5 == 0:
 cv2.imwrite("image%d.jpg" % count, image) # save frame as JPEG file
 count += 1

share|improve this answer

answered Mar 1 '18 at 5:32

JahKnowsJahKnows

5,347727

$endgroup$

add a comment | 

$begingroup$

You can use the modulo operator to identify multiples of count. Whenever it is a multiple of 5 save the image, otherwise just disregard it and move to the next iteration of the while loop.

Make sure the counter is outside the if statement. It will count every iteration. That is how we will determine if the current image is a multiple of 5.

import cv2 
import os
os.chdir('D:/Python images/videofolder') 
cap = cv2.VideoCapture('D:/Python images/test_videos/testcutvideo1.avi')
cap.isOpened()

count = 0
success = True
while success:
 success,image = cap.read()
 if count % 5 == 0:
 cv2.imwrite("image%d.jpg" % count, image) # save frame as JPEG file
 count += 1

share|improve this answer

answered Mar 1 '18 at 5:32

JahKnowsJahKnows

5,347727

$endgroup$

import cv2 
import os
os.chdir('D:/Python images/videofolder') 
cap = cv2.VideoCapture('D:/Python images/test_videos/testcutvideo1.avi')
cap.isOpened()

count = 0
success = True
while success:
 success,image = cap.read()
 if count % 5 == 0:
 cv2.imwrite("image%d.jpg" % count, image) # save frame as JPEG file
 count += 1

share|improve this answer

answered Mar 1 '18 at 5:32

JahKnowsJahKnows

5,347727

answered Mar 1 '18 at 5:32

JahKnowsJahKnows

5,347727

answered Mar 1 '18 at 5:32

JahKnowsJahKnows

5,347727