How to preview live video in App Designer using videoinput and preview?
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MathWorks Support Team
on 20 Nov 2018
Answered: MathWorks Support Team
on 9 Jan 2019
I am trying to capture live feed from a camera in App Designer. At the command window I can use "videoinput" and preview to do this, but it's not working in my app. How do I do this?
vid = videoinput('winvideo',1);
preview(vid)
Accepted Answer
MathWorks Support Team
on 20 Nov 2018
In order to preview the video in your uiaxes, you can create an image and preview the video on that image:
% Image acquisition
vid = videoinput('winvideo',1);
% Create blank image
hImage = image(app.UIAxes,zeros(720,1280,3)); %If image resolution is 1280x720
pause(2)
% These lines set proper aspect ratio
app.UIAxes.XLim = [0,1280];
app.UIAxes.YLim = [0,720];
app.UIAxes.XTick = [];
app.UIAxes.YTick = [];
pbaspect(app.UIAxes,[1280,720,1])
% Preview the image
preview(vid,hImage)
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