Need help with resolution limit

[mertcanozm]

we are trying to take a picture with a 4 MP webcam which is enough to take a picture with 1600x1200. however whenever we try to set pixels higher than 640x480 it reset to 640x480 automatically. we can not take any picture with fswebcam with higer resolution. can you help us

[harrie]

try: fswebcam -r 1600x1200 test.jpg