How to stop one pushbutton_Callback when another pushbutton_Callback is pressed?

I have multiple pushbuttons in my GUI and a single video file in each pushbutton_callback. Is there any line I can write at the start of each function to stop the currently running function so the video doesn't need to play all the way through?

If i click a pushbutton while the video is playing, the GUI will play the new video and when it finishes it will play the remaining of the video that was interrupted.

I can provide more info if the question is not clear enough. Thank you

function pushbutton1_Callback(hObject, eventdata, handles)
% hObject    handle to pushbutton1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

obj = VideoReader('supernewtable.mp4');
video = obj.read();
axes(handles.axes1);
fps=120;
for i=1:max(video(1,1,1,:))
    imshow(video(:,:,:,i));
    pause(0.5/fps);
end

function pushbutton2_Callback(hObject, eventdata, handles)
% hObject    handle to pushbutton2 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

obj = VideoReader('contgantry.mp4');
video = obj.read();
axes(handles.axes1);
fps=120;
for i=1:max(video(1,1,1,:))
    imshow(video(:,:,:,i));
    pause(0.5/fps);
end

Answer 1

[Walter Roberson]

In the below, I really think you should be replacing max(video(1,1,1,:)) with size(video,4) as the number of frames to play depends on the data size not on the content of the pixels.

function pushbutton1_Callback(hObject, eventdata, handles)
% hObject    handle to pushbutton1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

if ~isfield('handles', 'active_player')
  handles.active_player = 0;
end

%go ahead and bash the active player: the other routines will detect the change
%and will quit running
handles.active_player = 1;
guidata(hObject, handles);

obj = VideoReader('supernewtable.mp4');
video = obj.read();
axes(handles.axes1);
fps=120;
for i=1:max(video(1,1,1,:))
    handles = guidata(hObject);
    if handles.active_player ~= 1; break; end
    imshow(video(:,:,:,i));
    pause(0.5/fps);
end

function pushbutton2_Callback(hObject, eventdata, handles)
% hObject    handle to pushbutton2 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

if ~isfield('handles', 'active_player')
  handles.active_player = 0;
end

%go ahead and bash the active player: the other routines will detect the change
%and will quit running
handles.active_player = 2;
guidata(hObject, handles);

obj = VideoReader('contgantry.mp4');
video = obj.read();
axes(handles.axes1);
fps=120;
for i=1:max(video(1,1,1,:))
    handles = guidata(hObject);
    if handles.active_player ~= 2; break; end
    imshow(video(:,:,:,i));
    pause(0.5/fps);
end

[Peter]

size(video,4) actually fixed one of the video's playback and allowed it to play all the through. Thank you

Your solution fixed everything that wasn't working quite as planned. Thank you very much!

[Walter Roberson]

Looking again, I see you can omit the lines

if ~isfield('handles', 'active_player')
  handles.active_player = 0;
end