็How to send video object in function to GUI in Matlab

I want to send video obj use for when press start program but no data to processing and I press exit and I press start again video object OBJ has already been started. can't processing in program

then I want to know send video obj to GUI

Answer 1

[Geoff Hayes]

Adisorn - what is your order of operations? Do you launch the GUI and then call realtimefunction and pass in the handle to the GUI? Where is webcam3 defined or is this a function?

If you are trying to save the vid object to handles then you could do something like

 function [] = realtimefunction(GuiHandle)
 % your code
 handles.vid = vid;
 guidata(GuiHandle, handles);

which will update the handles structure of your GUI with the vid object. Then in your exit_Callback, you could do something like

 function exit_Callback(hObject, eventdata, handles)
 if isfield(handles, 'vid') && ~isempty(handles.vid)
     delete(handles.vid); % or close, whatever is relevant
     handles.vid = [];
     guidata(hObject, handles)
 end

As an aside, you should try to avoid using global variables.

[Adisorn Phanukthong]

Yes I call realtime function pass to GUI and webcam3 is function

[Adisorn Phanukthong]

see in my code I can't run pass in process Exit button

[Geoff Hayes]

In your webcam1.m file you do the following

 function start_Callback(hObject, eventdata, handles)
 GuiHandle = ancestor(hObject, 'figure');
 set(hObject, 'UserData', false);
 realtimefunction (GuiHandle);

Why do you initialize GuiHandle in this manner? Wouldn't it simply be

 GuiHandle = handles.figure1;

or something similar to that? When you do it your way (using ancestor) what is the value for GuiHandle?

[Adisorn Phanukthong]

thank you program is work good. but find Promblem in GUI Error while evaluating DestroyedObject Callback

[Geoff Hayes]

what is throwing the error? Please copy and paste the full error message and code that is generating said error.