When compiling a standalone application, how can I include the class VideoReader?

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Yifei Wang 2018-8-31

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https://ww2.mathworks.cn/matlabcentral/answers/417055-when-compiling-a-standalone-application-how-can-i-include-the-class-videoreader

评论： OCDER 2018-9-4

VideoReader is a class definition in MATLAB toolbox. The toolbox should be included in MATLAB compiler, but it seems that this class definition is not included. I tried to add the M file into the 'files required', but I was not let to do that. So how can I add the class VideoReader?

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OCDER 2018-8-31

Can you show the code you are trying to compile for VideoReader? Does it work without error in Matlab? What is the error message that you are getting?

I have no issues compiling functions containing VideoReader via mcc.

Yifei Wang 2018-9-4

编辑：Yifei Wang 2018-9-4

在 MATLAB Online 中打开

I wrote this code to test the function of VideoReader. It does work in GUIDE without error. I use this 'readFrame' here instead of 'read' as MATLAB recommends. Both work well in MATLAB, but neither is working for compiling. Do you have any idea about this?

    function pushbutton1_Callback(hObject, eventdata, handles)
    [VideoName,VideoPath,FilterIndex] = uigetfile('*.avi','Open AVI file');
    readerobj = VideoReader(VideoName);
    frame = 1;
    while hasFrame(readerobj)
        vidFrame = readFrame(readerobj);
        I(:,:,frame,:) = vidFrame;
        frame = frame + 1;
    end
    imshow(squeeze(uint8(I(:,:,1,:))));
    set(handles.text2,'String',VideoPath);
    whos('I')
    guidata(hObject, handles);

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Answer 1

OCDER 2018-9-4

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https://ww2.mathworks.cn/matlabcentral/answers/417055-when-compiling-a-standalone-application-how-can-i-include-the-class-videoreader#answer_335390

在 MATLAB Online 中打开

Change this:

readerobj = VideoReader(VideoName);

to this:

readerobj = VideoReader(fullfile(VideoPath, VideoName));

Always provide the full video file path, otherwise the compiled software cannot find the video file. The Matlab working paths are different form those of a compiled application.