For the STK1160, try this:
"grabber-v4l2" :
{
"device" : "/dev/video0",
"input" : 0,
"standard" : "PAL",
"width" : 240,
"height" : 192,
"frameDecimation" : 2,
"sizeDecimation" : 1,
By changing width, height and decimation to these values I got rid of the "frame too small" errors.
Good luck!