Python 3 OpenCV Script to Extract Frames of MP4 Video & Save it as PNG/JPEG Images

Welcome folks today in this blog post we will be extracting frames of mp4 video and saving it as png and jpg images inside command line using the opencv library. All the full source code of the application is shown below.

Get Started

In order to get started you need to install the below library using the below pip command as shown below

pip install opencv-python

After that you need to make an app.py file and copy paste the following code

app.py

import cv2
import os

cam = cv2.VideoCapture("video.mp4")

try:

    if not os.path.exists("data"):
        os.makedirs("data")

except OSError:
    print("Error: Creating directory of data")

currentframe = 0

while(True):

    ret,frame = cam.read()

    if ret:

        name = './data/frame' + str(currentframe) + '.jpg'

        print("Creating..." + name)

        cv2.imwrite(name,frame)

        currentframe +=1

    else:
        break

cam.release()

import cv2

import os

cam = cv2.VideoCapture("video.mp4")

try:

if not os.path.exists("data"):

os.makedirs("data")

except OSError:

print("Error: Creating directory of data")

currentframe = 0

while(True):

ret,frame = cam.read()

if ret:

name = './data/frame' + str(currentframe) + '.jpg'

print("Creating..." + name)

cv2.imwrite(name,frame)

currentframe +=1

else:

break

cam.release()

As you can see we are importing the opencv library and then we are importing the video.mp4 file and then we are using the while loop to extract the frames from the video file and saving it inside the root directory as image file using the imwrite() method. And then we are incrementing the currentframe of the video.

Now as you execute the above python script it will create the data directory and inside it we will have the images which will be created from the video.mp4 file