I just posted a program that allows you to set the frame rate to very low, or high, values. I’ve tested it as low as 0.1 Hz
You find the post in the sample applications section, I call it “EyeCapture”.
In your case you would run it from the command line:
eyecapture -h 5 -r 1 -f 3
Or in any other configuration to your taste:
Usage: eyecapture [-f format][-h framerate][-r resolution]
Options:
-f format 0 = CLEYE_MONO_PROCESSED
1 = CLEYE_COLOR_PROCESSED
2 = CLEYE_MONO_RAW
3 = CLEYE_COLOR_RAW
4 = CLEYE_BAYER_RAW
-h framerate QVGA supports 0.0 - 187.0Hz
VGA supports 0.0 - 75.0Hz
-r resolution 0 = QVGA
1 = VGA