I try to using spca50x.o

I have genius videocam express v2

systemlog says
Mar 25 08:01:50 kernel: drivers/usb/spca50x.c: USB SPCA5XX camera found. Type Genius VideoCAM Express V2 (SPCA561A)

but ./videodog -x 320 -y 240 -w 3 -d /dev/v4l/video0 -f /var/tmp/display.jpg
making a non jpg file every bytes in 0x format (upper 4 bit is 0)