Extract Video Frames In Python

Question

I want to extract video frames and save them as image.

import os, sys
from PIL import Image

a, b, c = os.popen3(\"ffmpeg -i test.avi\")
out = c.read()
dp =          


        

Answer 1

import numpy as np
import cv2


capture = cv2.VideoCapture(0)
size = (int(capture.get(3)),int(capture.get(4)))
fourcc = cv2.VideoWriter_fourcc(*'XVID')
video = cv2.VideoWriter('output.avi',fourcc,30,size)
print capture.isOpened()
num=0

while True:
    ret, img = capture.read()
    video.write(img)
    cv2.imshow('video',img)
    cv2.imwrite("image" + str(num) + ".jpg",img)
    num = num + 1
    key= cv2.waitKey(1)
    if  key == ord('q')
        num=0
        break

video.release()
capture.release()
cv2.destroyAllWindows() 

Answer 2

ffmpeg is complaining about there being a missing %d in the filename because you've asked it to convert multiple frames.

This post suggests this would be a better way of using ffmpeg to extract single frames

ffmpeg -i n.wmv -ss 00:00:20 -t 00:00:1 -s 320×240 -r 1 -f singlejpeg myframe.jpg

[edit]

After a bit more research, here is a command line which works outputing single png frames

ffmpeg -i test.avi -vcodec png -ss 10 -vframes 1 -an -f rawvideo test.png

Tested on my ubuntu 12.04 laptop

Answer 3

There are ffmpeg python modules are available

ffmpeg: https://code.google.com/p/pyffmpeg/

pyAV: https://github.com/mikeboers/PyAV

import av

container = av.open('/path/to/video.mp4')

for packet in container.demux():
    for frame in packet.decode():
        if frame.type == 'video':
            frame.to_image().save('/path/to/frame-%04d.jpg' % frame.index)

Answer 4

Easy way, use Open CV.

import cv2

vc = cv2.VideoCapture('Test.mp4')
c=1

if vc.isOpened():
    rval , frame = vc.read()
else:
    rval = False

while rval:
    rval, frame = vc.read()
    cv2.imwrite(str(c) + '.jpg',frame)
    c = c + 1
    cv2.waitKey(1)
vc.release()

Answer 5

Your ffmpeg does not support png File Format. You should use jpg or gif instead. Also follow this post (first posted by 'yesterday').

Answer 6

There is much easier way to do this. Just use OpenCV and get the all the frame required.

refer to the answer here: How to extract frames from Videos

It's done using Python3 and OpenCV 3+