vid = videoinput('kinect',1);
set(vid, 'framesperTrigger', 30, 'TriggerRepeat', Inf);
nBands = get(vid, 'NumberOfBands');
res=get(vid, 'Videoresolution');
start(vid);
prepstream = imshow(zeros([res nBands]));

figure;
res2=get(vid2, 'Videoresolution');