Error while evaluating uicontrol Callback

        global GUI1
        axes(handles.axes3);
        [GUI1,] = uigetfile('*.mp4');
        obj = VideoReader(GUI1);
        video = obj.read();
        axes(handles.axes3);
        fps=30;
        for i=1:max(video(1,1,1,:))
            imshow(video(:,:,:,i));
            pause(1/fps);
        end
          if true
            % code
          end
    %%%%%%%
    Error in untitled>Start_Callback (line 93)
        imshow(video(:,:,:,i));

Answer 1

[Geoff Hayes]

Shahmeer - please copy and paste the full error message (I suspect there is more to it than what you have pasted above). Also, what does the above correspond to? Is this the body for the Start_Callback function or for something else? Please include the full function signature and body.

Part of the problem may be how you are iterating over video. If you want to iterate over each frame (the fourth dimension) then instead of using max (which will return the maximum value of the video(1,1,1,:)) you should be using size instead to get the array dimension as

 numFrames = size(video,4);
 for i=1:numFrames
     % etc.
 end

[Shahmeer Rosli]

This is my error

Index exceeds matrix dimensions.

Error in untitled>Start_Callback (line 94)
    imshow(video(:,:,:,i));

Error in gui_mainfcn (line 95)
        feval(varargin{:});

Error in untitled (line 42)
    gui_mainfcn(gui_State, varargin{:});

Error in @(hObject,eventdata)untitled('Start_Callback',hObject,eventdata,guidata(hObject))

Error while evaluating UIControl Callback

[Shahmeer Rosli]

Here is my coding

[Geoff Hayes]

Shahmeer - try replacing your line

 for i=1:max(video(1,1,1,:))

with

 for i=1:size(video,4))

Using max will return a maximum value and not the size of the fourth dimension (which is your number of frames).

[Shahmeer Rosli]

New error

global GUI1

[GUI1,] = uigetfile('*.mp4');
obj = VideoReader(GUI1);
video = obj.read();
axes(handles.axes3);
fps=100;
for i=1:size(video,4);
    imshow(video(:,:,:,i));
    pause(1/fps);
end
setappdata(0,'video',obj);
handles.Start=video;
handles.current_video=video;
guidata(hOjects,handles);

Error

Undefined function or variable 'hOjects'.

Error in untitled>Start_Callback (line 96)
guidata(hOjects,handles);

Error in gui_mainfcn (line 95)
        feval(varargin{:});

Error in untitled (line 42)
    gui_mainfcn(gui_State, varargin{:});

Error in @(hObject,eventdata)untitled('Start_Callback',hObject,eventdata,guidata(hObject))

Error while evaluating UIControl Callback

[Walter Roberson]

hOjects should be hObject

[Shahmeer Rosli]

Tq