Comment 2 for bug 1435402

I found one interesting thing after print out the command from camera_test script, I found that it will try to use a "MJPG" palette, the printed command looks like this:
fswebcam -v -D 1 -S 50 --no-banner -d /dev/video0 -r 1280x720 /tmp/camera_test_MJPG1280x720injjhd48.jpg -p MJPG

However, if you copy and run this line on the very same machine, fswebcam will complain that this option does not exist:
Unrecognised palette format "MJPG". Supported formats:
PNG
JPEG
MJPEG

not sure why it could work with the script.