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

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 `width`
    height = vcap.get(cv2.cv.CV_CAP_PROP_FRAME_HEIGHT)  # float `height`
    # or
    width  = vcap.get(3)  # float `width`
    height = vcap.get(4)  # float `height`

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

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

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EDIT 2019: Currently cv2 uses little different names

cv2.CAP_PROP_FRAME_WIDTH   # 3
cv2.CAP_PROP_FRAME_HEIGHT  # 4

cv2.CAP_PROP_FPS           # 5
cv2.CAP_PROP_FRAME_COUNT   # 7

but they have the same values: 3, 4, 5, 7

import cv2

#vcap = cv2.VideoCapture(0)  # built-in webcamera

vcap = cv2.VideoCapture('video.avi')

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

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

    #print('cv2.CAP_PROP_FRAME_WIDTH :', cv2.CAP_PROP_FRAME_WIDTH)   # 3
    #print('cv2.CAP_PROP_FRAME_HEIGHT:', cv2.CAP_PROP_FRAME_HEIGHT)  # 4
    #print('cv2.CAP_PROP_FPS         :', cv2.CAP_PROP_FPS)           # 5
    #print('cv2.CAP_PROP_FRAME_COUNT :', cv2.CAP_PROP_FRAME_COUNT)   # 7

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