First we need VLC. After installing it, we can send it commands from the console, including transparently for the user. For example, this file will take one frame from the webcam and put it into the specified directory.
"C:\Program Files (x86)\VideoLAN\VLC\vlc.exe" --dshow-vdev="iLook 310" --dshow-size=640x480 --video-filter=scene --no-audio --scene-path=C:\Users\Ast\Pictures\Snaps\ --scene-format=jpeg --scene-prefix=snap --run-time=1 --intf=dummy -V dummy --scene-replace --dummy-quiet "dshow://" vlc://quit
set datetimef=%date:~-4%_%date:~3,2%_%date:~0,2%__%time:~0,2%_%time:~3,2%_%time:~6,2%
copy "C:\Users\Ast\Pictures\Snaps\snap.jpeg" "C:\Users\Ast\Pictures\Snaps\%datetimef%.jpeg"In this example, iLook 310 is the name of the source; you can look it up through the VLC GUI.
