how to record real time video from a usb camera?

Hello, I am creating my video_object with the following line:

    vid = videoinput('pixelinkimaq', 1);

I know how to set my ROI, and how to set my FrameRate.

What I can't manage to do is how to record, lets say 1 sec of video.

I'd like to define the NumberOfRecordedFrames and then initiate the recording

start(vid) % right?

if NumberOfRecordedFrames = FrameRate, then recording should stop after 1 sec.

I'd like the recorded movie to be stored in some workspace variable.

Can someone help please.

Thank you.

[Geoff Hayes]

Mark - I don't have the Image Acquisition Toolbox, but perhaps you are supposed to make use of a trigger to stop the recording. See Starting and Stopping a Video Input Object for details.

[Mark Golberg]

Thank you. I am sure it's something very straight forward, but I can't figure it out how create a recording of X seconds.

I mean, I'd like to set fps=100, then record for 1 second, and receive in the workspace a variable with 100 frames.

Pretty sure this could be made with a few lines of code, but it seems I a missing something basic here.

Help someone...??? Please!!!

[Geoff Hayes]

Mark - see Walter's answer at http://www.mathworks.com/matlabcentral/answers/112087-how-to-captured-60-frames-in-1-sec.