losing webcam video stream

I recently been running into an error with webcam video. At some random point I will lose the webcam stream and video-saving will stop. At this point I have to restart matlab to regain stream. It doesn't seem to be a hardware issue, since I can stream the webcam using another software. This only started happening a few weeks ago, and, suspiciously, it happens for two independent computer/webcams. the only major change I can think of is some Windows updates.

Here is the traceback:
Warning: No video frames were written to this file. The file may be invalid.
> In VideoWriter/close (line 282)
In mltrialdata/export_to_file (line 75)
In run_trial (line 142)
In monkeylogic/UIcallback (line 879)

Thanks!

Sorry. That does not give me much to test with. Try a different video resolution or the latest NIMH ML.