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use maemo (N900) camera by python

I wrote a simple program for Maemo by Python to check some pixels color every time that my function is called.
But this program is working so slow (3-5 seconds each call).
Is there any faster way for doing this?

Code:

import Image

import os

import sys



#sen_pos = (pixel_x,pixel_y)

def sen(sen_pos):



    os.system("gst-launch v4l2src device=/dev/video0 num-buffers=1 ! ffmpegcolorspace ! jpegenc ! filesink location=cam.jpg")

    frame = Image.open("cam.jpg")

    col = frame.getpixel((sen_pos[0],sen_pos[1]))

    avecol = sum(col)/len(col)

    if avecol>127:

        return "white"

    elif avecol<127:

        return "black"

    return None

Re: use maemo (N900) camera by python

Quote:

Originally Posted by sinal (Post 1115471)

Code:

import Image

import os

import sys



#sen_pos = (pixel_x,pixel_y)

def sen(sen_pos):



    os.system("gst-launch v4l2src device=/dev/video0 num-buffers=1 ! ffmpegcolorspace ! jpegenc ! filesink location=cam.jpg")

    frame = Image.open("cam.jpg")

    col = frame.getpixel((sen_pos[0],sen_pos[1]))

    avecol = sum(col)/len(col)

    if avecol>127:

        return "white"

    elif avecol<127:

        return "black"

    return None

Probably it takes that time to build the gstreamer stream, activate the camera, take the image, and deactivate the camera
mplayer allows to save a screenshot in slave mode, see mplayer's man page.
You could have mplayer running and send it the screenshot command whenever you need to take the image.