A typo in the output files path causes the script to attempt to write
all captured frames to /. Fix it.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Calling exit from a function only exits from the function, it doesn't
abort the whole script. Propagate the errors to stop operation when the
sensor or media device can't be found.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
