Python cv2.VideoCapture() has wrong resolution and read cropped images-CodePudding

I'm trying to read images from an IDS GV-5240CP camera plugged to my laptop via ethernet using Python and OpenCV.

This is what I am supposed to get :

A 1280x1024 image (here resized for upload)

But using this code:

import cv2

cap = cv2.VideoCapture(1)

_, frame = cap.read()

print(frame.shape)

cv2.imshow("Out", frame)

cv2.waitKey(2000)
cap.release()
cv2.destroyAllWindows()

cv2.imwrite('Test2.png', frame)

I get:

A 640x480 cropped image

How can I set my video capture to the native resolution?

CodePudding user response：

VideoCapture uses 640x480 by default.

If you want a different resolution, specify it in the constructor or use the set() method with CAP_PROP_FRAME_WIDTH and so on. Details in the docs.

cap = cv2.VideoCapture(1, apiPreference=cv2.CAP_ANY, params=[
    cv2.CAP_PROP_FRAME_WIDTH, 1280,
    cv2.CAP_PROP_FRAME_HEIGHT, 1024])

CodePudding user response：

out = cv2.VideoWriter(("E:", 'output.avi'), fourcc, 20.0, (640, 480)) try using this and change the resolution according to your need, tho it will download or use cv2.resize(frame,(w,h),fx=0,fy=0, interpolation = cv2.INTER_CUBIC)