MATLAB standalone App not working when installed on another system

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NAVNEET NAYAN 2023-8-27

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评论： NAVNEET NAYAN 2023-9-11

I designed a MATLAB App using MATLAB App Designer. My app plays videos corresponding to the given words. It works fine. Next, using MATLAB compiler I developed .exe file of my app. Using this .exe file I installed the app on different system. On this system, my app window opens but when I give words as input I don't get any video. I simply get blank GUI window of my app. Can anyone suggest some way out? Feel free to comment.

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Image Analyst 2023-8-27

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See the FAQ for a list of common reasons your compiled app won't run on a target system:

https://matlab.fandom.com/wiki/FAQ#My_standalone_executable_won't_run_on_the_target_computer._What_can_I_try?

Most likely it's a path problem where you are either not deploying the videos to the target system, or you are not specifying the full path name correctly in the code (like you're just assuming the videos should be in the current folder).

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Image Analyst 2023-8-27

在 MATLAB Online 中打开

What kind of variable is alph? Isn't it just a string that the user type in? So you don't want to loop over every character in the filename with a for loop. That doesn't make sense. You just want to take the name and build the filename from it and loop over the individual frames ONLY. Here is much more robust code:

% Button pushed function: PlayButton
function PlayButtonPushed(app, event)
% Get base file name from edit field.
baseFileName = app.InputDataEditField.Value;
% Specify a folder in a fixed location.
folder = 'F:\test_vids';
% Folder = pwd;
% See if the folder exists.
if ~isfolder(folder)
    warningMessage = sprintf('Warning: folder not found.  Please check path.\n"%s"', folder)
    uiwait(warndlg(warningMessage));
    % Pop open that folder in File Explorer if using Windows
    if ispc
        winopen(folder);
    end
    return;
end
% If it gets here the folder is good.
% Build the filename from what the user typed in in the edit field.
fullFileName = fullfile(folder, baseFileName);
% See if the user specified an extension.
[f, baseFilenameNoExt, ext] = fileparts(baseFileName);
% If they did not specify an extension, tack on .avi.
if isempty(ext)
    fullFileName = fullfile(folder, [baseFilenameNoExt, '.avi']);
end
% See if the avi file actually exists.
if ~isfile(fullFileName)
    warningMessage = sprintf('Warning: file not found.  Please check path.\n"%s"', fullFileName)
    uiwait(warndlg(warningMessage));
    % Pop open that folder in File Explorer if using Windows
    if ispc
        winopen(Folder);
    end
    return;
end
% If it gets to here both the folder and AVI file exist.  So read it in.
videoFReader = VideoReader(fullFileName);
numFrames = videoFReader.NumberOfFrames;
for m = 1 : numFrames
    thisFrame = read(videoFReader,m);
    imshow(thisFrame, 'Parent', app.UIAxes);
    drawnow; % Make sure axes updates immediately.
end
end

However, even this is not great. You should not force users to type in a filename. You should have a listbox where you call dir and load up the listbox with the filenames so they can simply click a filename in the listbox.

NAVNEET NAYAN 2023-9-4

编辑：NAVNEET NAYAN 2023-9-5

MATLAB_APP_Files.zip

Here, I have attached the .zip file that contains the .mlapp files and .mp4 files of few alphabets and words. My target is to display videos of alphabets, combination of alphabets (with space and without space) and words and run this app as a standalone app on a different system.

NAVNEET NAYAN 2023-9-11

@Image Analyst Did you get some time to look into the problem? I kept on trying to find a way but I couldn't find a solution.

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