VideoReader in App Designer

How do I use VideoReader in app designer to display video on a UIAxes?

Answer 1

[OCDER]

I'm guessing you're familiar with callbacks in app designer? If not, here's the tutorial.

>> appdesigner.internal.application.openTutorial('BasicCoding')

In the callback function for the button that will read the video image, do something like this:

filename = 'myvideo.mp4';
v = VideoReader(filename);

while hasFrame(v)
   imshow(getFrame(v), 'Parent', app.UIAxes);
end

[T.A.S.]

I get "error using getframe a valid figure or axes handle must be defined"

[OCDER]

Oops, it should have been readFrame, not getFrame. I edited the answer above.

[OCDER]

There's a capital "F" in readFrame.

readFrame(v)
    ^

[T.A.S.]

How do i get it to play multiple frames from the video? its just displaying one for now.

[OCDER]

You might need to add a drawnow or pause(0.01) after the imshow to be able to see the video. Not sure how to set the frame rate, as that requires a different function called implay, which doesn't seem to be able to control a UIAxes.