Error while evaluating uicontrol Callback

2016 5 15
1 个回答
回答已采纳
更新时间：2016 5 15
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0 个投票

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));

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 采纳的回答

Geoff Hayes
Geoff Hayes 2016-5-15

0 个投票

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

6 个评论
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Shahmeer Rosli
Shahmeer Rosli 2016-5-15
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
Geoff Hayes
Geoff Hayes 2016-5-15
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
Shahmeer Rosli 2016-5-15
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
Walter Roberson 2016-5-15
hOjects should be hObject

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