Camera, XO 1.5 vs XO 1
cjb at laptop.org
Sat Apr 24 12:18:06 EDT 2010
You don't mention which build you're using, and it's important because
we're still making many changes to the camera setup, so please do that
> - XO 1 has slower response time in the video being shown.
I think this is probably http://dev.laptop.org/ticket/10045.
The 1.5 setup is capable of producing many more fps from the camera
than 1.0, and Record doesn't use a framerate limiter on the preview
window, with the result that you see a very high fps on the 1.5
preview window at the cost of so much CPU use that Record becomes
Daniel Drake's latest patches to Record add a framerate limiter to
its preview window, which will make 1.5 behave more like 1.0.
> - XO 1 has a much brighter picture, which results in a
> much clearer one. Even with good surrounding light, the 1.5
> shows a very dark image.
Don't know about this. We do have some control over brightness/gain
in the kernel driver, I think.
> - XO 1.5 record isn't saving more than 2s of video.
http://dev.laptop.org/ticket/10070. Was fixed back in os119, as far
as we know.
> I thought that the camera sensor had been exchanged between
> revisions but I've just checked and it's the same. What gives?
Yes, the sensor's the same, but the hardware and software interfacing
to it is different.
os121 (about to be released) should be able to record video well,
please re-test with that when it's out.
Chris Ball <cjb at laptop.org>
One Laptop Per Child
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