How do I extract individual frames while taking video input from a webcam?

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Here's a snippet of the program for Fall Detection which analyses a video clip frame-by-frame :
while ~isDone(vid) % vid = vision.VideoFileReader(vidname); where vidname is the filename of the video clip
frame = step(vid);
frameNo = frameNo+1;
How do I edit it so that instead of a video clip the input is taken from my webcam?

Accepted Answer

Saurabh Kumar
Saurabh Kumar on 19 Jun 2020
You just need to create a VideoDevice System object (say vidobj) and replace vid with vidobj :
% Construct a VideoDevice System object associated with the Winvideo adaptor with device ID of 1.
vidobj = imaq.VideoDevice('winvideo', 1);
while true % The program will run as long as the webcam is on.
frame = step(vidobj);
frameNo = frameNo+1;
You can read more about acquiring frames through VideoDevice System object here :

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