Get video dimension in python-opencv

Question

I can get size of image, like this:

import cv2

img = cv2.imread(\'my_image.jpg\',0)
height, width = img.shape[:2]

How about video?

Answer 1

For the 3.3.1 version, the methods have changed. Check this link for the changes: https://docs.opencv.org/3.3.1/d4/d15/group__videoio__flags__base.html#ga023786be1ee68a9105bf2e48c700294d

Instead of cv2.cv.CV_CAP_PROP_FRAME_WIDTH use cv2.CAP_PROP_FRAME_WIDTH and others as necessary from the link above.

Answer 2

cv2.__version__
'3.4.3' 

w = int(cap.get(cv2.CAP_PROP_FRAME_WIDTH))
h = int(cap.get(cv2.CAP_PROP_FRAME_HEIGHT))
fps = int(cap.get(cv2.CAP_PROP_FPS))
n_frames = int(cap.get(cv2.CAP_PROP_FRAME_COUNT))

Answer 3

You can use the vcap.get(i) method, where i can be between 0 and 21, according to the OpenCV docs.

Answer 4

It gives width and height of file or camera as float (so you may have to convert to integer)

But it always gives me 0.0 FPS.

import cv2

vcap = cv2.VideoCapture('video.avi') # 0=camera
 
if vcap.isOpened(): 
    # get vcap property 
    width  = vcap.get(cv2.cv.CV_CAP_PROP_FRAME_WIDTH)  # float
    height = vcap.get(cv2.cv.CV_CAP_PROP_FRAME_HEIGHT) # float
    # or
    width  = vcap.get(3) # float
    height = vcap.get(4) # float

    # it gives me 0.0 :/
    fps = vcap.get(cv2.cv.CV_CAP_PROP_FPS)

---

It seems it can works fps = vcap.get(7) but I checked this only on one file.

---

EDIT 2019: Current cv2 uses little different names (but they have the same values: 3, 4, 5, 7)

import cv2

vcap = cv2.VideoCapture('video.avi') # 0=camera

if vcap.isOpened(): 
    width  = vcap.get(cv2.CAP_PROP_FRAME_WIDTH)   # float
    height = vcap.get(cv2.CAP_PROP_FRAME_HEIGHT)  # float
    #print(cv2.CAP_PROP_FRAME_WIDTH, cv2.CAP_PROP_FRAME_HEIGHT) # 3, 4

    # or
    width  = vcap.get(3) # float
    height = vcap.get(4) # float

    print('width, height:', width, height)
    
    fps = vcap.get(cv2.CAP_PROP_FPS)
    print('fps:', fps)  # float
    #print(cv2.CAP_PROP_FPS) # 5
    
    frame_count = vcap.get(cv2.CAP_PROP_FRAME_COUNT)
    print('frames count:', frame_count)  # float
    #print(cv2.CAP_PROP_FRAME_COUNT) # 7

---

EDIT 2020: all properties in How do I get usb webcam property IDs for OpenCV

Answer 5

width = vcap.get(cv2.CAP_PROP_FRAME_WIDTH )
height = vcap.get(cv2.CAP_PROP_FRAME_HEIGHT )
fps =  vcap.get(cv2.CAP_PROP_FPS)

or

width = vcap.get(3)
height = vcap.get(4)
fps = vcap.get(5)