Re: Problem with gspca and zc3xx

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El Lunes, 11 de Enero de 2010, Jean-Francois Moine escribió:
> On Mon, 11 Jan 2010 09:37:29 +0100
> 
> Hans de Goede <hdegoede@xxxxxxxxxx> wrote:
> > This is the infamous zc3xx bottom of the image is missing in 320x240
> > problem, with several sensors the register settings we took from the
> > windows driver will only give you 320x232 (iirc), we tried changing
> > them to get 320x240, but then the camera would not stream. Most
> > likely some timing issue between bridge and sensor.
> >
> > I once had a patch fixing this by actually reporting the broken modes
> > as 320x232, but that never got applied as it breaks app which are
> > hardcoded to ask for 320x240. libv4l has had the ability to extend
> > the 320x232 image to 320x240 for a while now (by adding a few black
> > lines at the top + bottom), fixing the hardcoded apps problem.
> >
> > So I think such a patch can and should be applied now. This will get
> > rid of the jpeg decompression errors reported by libv4l and in case
> > if yuv mode the ugly green bar with some random noise in it at the
> > bottom.
> >
> > I'm afraid my patch is most likely lost, but I can create a new one
> > if you want, I have access to quite a few zc3xx camera's, and more
> > over what resolution they are actually streaming at can be deducted
> > from the register settings in the driver.
> 
> Hi Hans,
> 
> As you may see in Jose Alberto's message, the problem occurs with
> 640x480 and, yes, the image bottom is lacking, but also the right side.
> 
> I did not lose your patch, but I did not apply it because most of the
> time, the webcams work in the best resolution (VGA) and the associated
> problem has not found yet a good resolution...
> 
> Regards.
> 

I take another image with 640x480 and the bad bottom lines are 8. The right 
side look right this time. The good sizes are:
320x240->320x232  
640x480->640x472

Jose Alberto

Attachment: image2.dat
Description: JPEG image


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