motion detection error unlble to make video

function varargout = MOTION(varargin)
% MOTION MATLAB code for MOTION.fig
%      MOTION, by itself, creates a new MOTION or raises the existing
%      singleton*.
%
%      H = MOTION returns the handle to a new MOTION or the handle to
%      the existing singleton*.
%
%      MOTION('CALLBACK',hObject,eventData,handles,...) calls the local
%      function named CALLBACK in MOTION.M with the given input arguments.
%
%      MOTION('Property','Value',...) creates a new MOTION or raises the
%      existing singleton*.  Starting from the left, property value pairs are
%      applied to the GUI before MOTION_OpeningFcn gets called.  An
%      unrecognized property name or invalid value makes property application
%      stop.  All inputs are passed to MOTION_OpeningFcn via varargin.
%
%      *See GUI Options on GUIDE's Tools menu.  Choose "GUI allows only one
%      instance to run (singleton)".
%
% See also: GUIDE, GUIDATA, GUIHANDLES

% Edit the above text to modify the response to help MOTION

% Last Modified by GUIDE v2.5 08-Apr-2012 22:40:31

% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @MOTION_OpeningFcn, ...
                   'gui_OutputFcn',  @MOTION_OutputFcn, ...
                   'gui_LayoutFcn',  [] , ...
                   'gui_Callback',   []);
if nargin && ischar(varargin{1})
    gui_State.gui_Callback = str2func(varargin{1});
end

if nargout
    [varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});
else
    gui_mainfcn(gui_State, varargin{:});
end
% End initialization code - DO NOT EDIT

% --- Executes just before MOTION is made visible.
function MOTION_OpeningFcn(hObject, eventdata, handles, varargin)
% This function has no output args, see OutputFcn.
% hObject    handle to figure
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
% varargin   command line arguments to MOTION (see VARARGIN)

% Choose default command line output for MOTION
handles.output = hObject;

% Update handles structure
guidata(hObject, handles);

% UIWAIT makes MOTION wait for user response (see UIRESUME)
% uiwait(handles.MOTION);

% --- Outputs from this function are returned to the command line.
function varargout = MOTION_OutputFcn(hObject, eventdata, handles) 
% varargout  cell array for returning output args (see VARARGOUT);
% hObject    handle to figure
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Get default command line output from handles structure
varargout{1} = handles.output;

% --- Executes on button press in pushbutton1.
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)
global vid
imaqreset;
error=50;
s=25;
vid=videoinput('winvideo',1,'YUY2_640x480');% take video input
triggerconfig(vid,'manual');  % after triggering only we get video
set(vid,'FramesPerTrigger',1); %only 1 frame per trigger
set(vid,'TriggerRepeat', Inf); %repeating trigger infinite timf
set(vid,'ReturnedColorSpace','rgb');% colour space used is rgb

i=0;
start(vid);% video is started

%adjusting for background noise

for n=1:50
    trigger(vid);
    temp=getdata(vid,1);
    f(:,:,mod(n,2)+1)=temp(2);
    g=f(:,:,1)~=f(:,:,2);
    %sm(1,n)=backgroundcheck(g);
end
clear g;
clear temp;

   %f=zeros(480,640,2);
  %s=max(sm(25:50));
  if (nargin==0)
      error=2;
  end
  s=(s*(error+100))/100;% calculate sensitivity
  clear sm;
  clc
  disp('backbround sensitivity=');%display sensitivity
  disp(s);

disp('MOTION DETECTOR ON ->');
prev=getsnapshot(vid);%take video snpshot as previous one 
while(1)

   j=0;
      trigger(vid);
      temp=getdata(vid,1);% take video data
      axes(handles.axes2); %point to the axes where u want to display the frame
      imshow(temp);  %show the frame on axes
      g=getsnapshot(vid); %get current frame 
      %f(:,:,mod(i,2)+1)=temp;

      %g=f(:,:,1)~=f(:,:,2);
     a=prev-g; %take difference between 2 frames
      prev=g; % store current frame as previous frame
      if(sum(sum(a))>(s/10)*100*50)%check if difference between frames is greater than threshold
       disp('motion detected');%yes than motion detected
       axes(handles.axes3);
        imshow(a);%show difference as snapshot 
        imwrite(a,'captured.jpeg');%store difference to folder
         j=j+1;% continue the loop
      end

      if(mod(j,6)==0)  %check if motion detected 6 times
          clc;
          disp('MOTION DETECTOR ON ->');
  %         y=y(1:3000); %  to play the alarm
  %       0  for a=1:4
  %             wavplay(y,4500,'sync');
  %         end
      end

%     disp('difference');
%     disp(sum(sum(sum(a))));
   i=i+1;%continue the loop

%end
%end  
end

% --- Executes on button press in pushbutton2.
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)

global vid
stop(vid);% to stop the video

the errors tahat are coming are as follow can u please help me out with these

motion detected
??? Error using ==> imaqdevice.getdata at 153
GETDATA timed out before FRAMES were available.

Error in ==> MOTION>pushbutton1_Callback at 99
    temp=getdata(vid,1);

Error in ==> gui_mainfcn at 96
        feval(varargin{:});

Error in ==> MOTION at 42
    gui_mainfcn(gui_State, varargin{:});

Error in ==> @(hObject,eventdata)MOTION('pushbutton1_Callback',hObject,eventdata,guidata(hObject))

??? Error using ==> axes
Error while evaluating uicontrol Callback

Error event occurred at 01:27:01 for video input object: YUY2_640x480-winvideo-1.
GETDATA timed out before FRAMES were available.