grab frame NTSCtoUSB dongle, opencv2, python wrapper

Question

Context:

I have been playing around with python\'s wrapper for opencv2. I wanted to play with a few ideas and use a wide angle camera similar to \'rear view\' came

Answer 1

I faced the same issue. As a workaround, I first tried the solution proposed by @user3380927 and it worked indeed. But since I didn't want to rely on an external software, I started tweaking parameters using opencv in Python.

This lines of code worked like a charm (you have to insert them before reading the frame for the first time):

cam.set(cv2.CAP_FFMPEG,True)
cam.set(cv2.CAP_PROP_FPS,30)

So, the full code for basic camera reading is as follows:

import cv2

cam = cv2.VideoCapture(1)
cam.set(cv2.CAP_FFMPEG,True)
cam.set(cv2.CAP_PROP_FPS,30)

while(True):
    ret,frame = cam.read()
    cv2.imshow('frame',frame)
    if (cv2.waitKey(1) & 0xFF == ord('q')):
        break

cam.release()
cv2.destroyAllWindows()

You can then apply image processing operations as usual. Just for reference, this was my configuration:

• Opencv 3.1.0
• Python 2.7.5
• Windows 8.1
• Elgato Video Capture device (this was also shown as Sound Video & Game controllers)