How do I access my webcam in Python?

Question

I would like to access my webcam from Python.

I tried using the VideoCapture extension (tutorial), but that didn't work very well for me, I had to work around some problems such as it's a bit slow with resolutions >320x230, and sometimes it returns None for no apparent reason.

Is there a better way to access my webcam from Python?

Answer 1

OpenCV has support for getting data from a webcam, and it comes with Python wrappers by default, you also need to install numpy for the OpenCV Python extension (called cv2) to work. As of 2019, you can install both of these libraries with pip: pip install numpy pip install opencv-python

More information on using OpenCV with Python.

An example copied from Displaying webcam feed using opencv and python:

import cv2  cv2.namedWindow("preview") vc = cv2.VideoCapture(0)  if vc.isOpened(): # try to get the first frame     rval, frame = vc.read() else:     rval = False  while rval:     cv2.imshow("preview", frame)     rval, frame = vc.read()     key = cv2.waitKey(20)     if key == 27: # exit on ESC         break  vc.release() cv2.destroyWindow("preview") 

Answer 2

gstreamer can handle webcam input. If I remeber well, there are python bindings for it!