How do I access my webcam in Python?
PythonWebcamPython Problem Overview
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?
Python Solutions
Solution 1 - Python
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")
Solution 2 - Python
gstreamer can handle webcam input. If I remeber well, there are python bindings for it!
Solution 3 - Python
import cv2 as cv
capture = cv.VideoCapture(0)
while True:
isTrue,frame = capture.read()
cv.imshow('Video',frame)
if cv.waitKey(20) & 0xFF==ord('d'):
break
capture.release()
cv.destroyAllWindows()
0 <-- refers to the camera , replace it with file path to read a video file
cv.waitKey(20) & 0xFF==ord('d') <-- to destroy window when key is pressed