Problems taking pictures with the camera (on nokia N810)

[phil232fm]

Hi

Using the camera example for python here I added
actual code to the buffer callback to actually save a picture, like so:

def buffer_cb(self, element, buffer, pad):
        if self.picture_taken:
            self.picture_taken = False
            print "picture taken"
            image = Image.fromstring("P", (640,480), buffer)
            image = image.convert("RGB")
            image.save("picture.jpg")
            
        return True

The problem is that the picture turns out in grayscale. If I set the mode for the fromstring method to "RGB" or "CMYK" it gives a "ValueError: not enough image data" error, and only the "P" mode seems to work. This seems odd as looking at the size of the buffer recieved (as a string) it is definately big enough for a colour image at 640*480. Does anyone have any clue what's going on?

Thanks in advance

[jethro.fn]

You may need to configure the raw decoder to match the input format (see the raw decoder documentation):

image = Image.fromstring("RGB", (640, 480), buffer, "raw", "RGB", 0)

Experiment with the raw mode and stride parameters to get a correct image.

By the way, this forum is mainly populated by people who use PyS60 (Python for S60 phones). Maemo-specific questions probably get more answers on maemo.org developer mailing list or internettablettalk.com (soon to be called talk.maemo.org) forums.