Cannot find an exact (case-sensitive) match for 'getFrame' ?
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LEKHCHINE Somia
le 26 Juil 2019
Commenté : Walter Roberson
le 27 Juil 2019
I use matlab R2018b and Iwant to display a video in axes using app designer this is my code:
function importervideoButtonPushed(app, event)
% to import some thing
[a, b]= uigetfile({'*.*'});
vid = VideoReader([b a]);
while hasFrame(vid)
imshow(getFrame(vid), 'Parent', app.UIAxes1);
end
end
but when I push on the button the following error is written
what should I do ?
8 commentaires
Walter Roberson
le 27 Juil 2019
Remember to put in a drawnow() after the imshow()
Also, imshow() is a fairly expensive operation. It is better (faster) to create a image() object and set the the CData property of the object.
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Walter Roberson
le 27 Juil 2019
Modifié(e) : Walter Roberson
le 27 Juil 2019
function importervideoButtonPushed(app, event)
% to import some thing
[a, b]= uigetfile({'*.*'});
vid = VideoReader([b a]);
first = true;
while hasFrame(vid)
thisframe = readFrame(vid);
if first
img = imshow(thisFrame, 'Parent', app.UIAxes1);
first = false;
else
img.CData = thisframe;
end
drawnow();
end
end
2 commentaires
Walter Roberson
le 27 Juil 2019
function importervideoButtonPushed(app, event)
% to import some thing
[a, b]= uigetfile({'*.*'});
vid = VideoReader([b a]);
first = true;
while hasFrame(vid)
thisframe = readFrame(vid);
if first
img = imshow(thisframe, 'Parent', app.UIAxes1);
first = false;
else
img.CData = thisframe;
end
drawnow();
end
end
Plus de réponses (1)
LEKHCHINE Somia
le 27 Juil 2019
1 commentaire
Walter Roberson
le 27 Juil 2019
I guess you could do that, but it should not be needed, not unless you want to access the last frame of the video after the video is played.
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