Background subtraction method i am getting following error while reading video-please help me

Warning: The end of file was reached before the requested frames were read completely.  Frames 1 through 613 were returned. 
??? Index exceeds matrix dimensions.

code:

obj=mmread
er('ATMvid.avi');
a=read(obj);
frames=get(obj,'numberOfFrames');
for k = 1 : frames-1
source(k).cdata = a(:,:,:,k);
source(k).colormap = [];
end

Answer 1

[Walter Roberson]

Someone else had this recently and we did not figure out why they got the end of file message.

Instead of looping to numberOfFrames, go to size(a,4)

[pratibha rane]

thanks