[ivtv-users] CX18: Black and white horizontal line with HVR-1600

k niemand jknoedel at yahoo.com
Wed Jan 20 23:22:56 CET 2010


Hi Andy,
I am residing in the US and I am using the HVR-1600 to watch some broadcasting from my cable box (using s-video). A while back you had mentioned that you were going to work on the VBI issue of this card. I saw that you had completed support for sliced and raw VBI for 625 line system. I recently downloaded a fresh v4l-dvb copy from the mercurial deposit and compiled it. On my system (NTSC, s-video from a cable box), I still see the black and white horizontal line on the top. In one of your earlier email you wrote:
"The wrong values for vblank and vactive may be being used in the cx18-av-core.c file."

Any idea what it would take to get this working for NTSC? I am more than happy to try out some changes.

Thanks a lot,

Joe

--- On Tue, 2/24/09, k niemand <jknoedel at yahoo.com> wrote:

> From: k niemand <jknoedel at yahoo.com>
> Subject: Re: [ivtv-users] CX18: Black and white horizontal line with HVR-1600
> To: ivtv-users at ivtvdriver.org
> Date: Tuesday, February 24, 2009, 9:32 AM
> 
> I had downloaded the lates one a couple of weeks ago,
> compiled it and installed it, but the problem is still
> there. 
> 
> Thanks for all the work,
> Joe
> 
> > 
> > Well I'd suggest the latest driver from the main
> > repository:
> > 
> > http://linuxtv.org/hg/v4l-dvb
> > 
> > and see if the problem still persists.  If dmesg
> tells you
> > right now
> > that you're using a cx18 driver less than version
> > 1.0.4, things should
> > get better with the latest driver.
> > 
> > Instructions are here:
> > 
> > http://www.ivtvdriver.org/index.php/Cx18
> > 
> > but last I heard, Ubuntu does some distribution
> specific
> > things that may
> > make compiling the latest v4l-dvb repo harder than it
> has
> > to be.  Sorry,
> > I won't be able to help with that if that's the
> > case.
> > 
> > 
> > > Any idea of when you have time to look at this
> issue?
> > It sounds like
> > > you are very busy. 
> > 
> > I'm travelling off and on the the next two weeks, so
> > I'm not sure when I
> > will be looking at it.
> > 
> > Regards,
> > Andy
> > 
> > > Anything I can try?
> > > 
> > > Thanks,
> > > Joe
> > > 
> > > 
> > > 
> > > --- On Thu, 2/12/09, Andy Walls
> > <awalls at radix.net>
> wrote:
> > > 
> > > > From: Andy Walls <awalls at radix.net>
> > > > Subject: Re: [ivtv-users] CX18: Black and
> white
> > horizontal line with HVR-1600
> > > > To: jknoedel at yahoo.com,
> "User discussion
> > about IVTV" <ivtv-users at ivtvdriver.org>
> > > > Date: Thursday, February 12, 2009, 10:45 PM
> > > > On Thu, 2009-02-12 at 17:11 -0800, k
> niemand
> > wrote:
> > > > > I have a HVR-1600 card and installed
> the
> > latest
> > > > driver. I use the
> > > > > latest Ubuntu distribution. Composite
> input
> > works fine
> > > > apart from an
> > > > > annoying black and white horizontal
> line at
> > the top of
> > > > the picture. I
> > > > > tried the --set-crop option using
> v4l2-ctl
> > (v4l2-ctl
> > > > > --set-crop=top=1), but the responds I
> get is
> > > > "VIDIOC_G_CROP: failed:
> > > > > Invalid argument". 
> > > > 
> > > > The driver doesn't really support the crop
> > ioctl.  It
> > > > provides a stub
> > > > that goes through some trivial motions, but
> then
> > always
> > > > returns -EINVAL.
> > > > 
> > > > 
> > > > > Does anyone have any ideas of how to
> get rid
> > of this
> > > > line? 
> > > > 
> > > > Well, I have to fix the driver to get rid of
> it.
> > > > 
> > > > That line is part of the Vertical Blanking
> > Interval; the
> > > > white areas are
> > > > data that's being sent (like CC over NTSC
> or
> > VPS or
> > > > Teletext for other
> > > > video standards).  The wrong values for
> vblank
> > and vactive
> > > > may be being
> > > > used in the cx18-av-core.c file. 
> > > > 
> > > > Are you using PAL, SECAM, or NTSC?  Is
> this a new
> > problem,
> > > > or one that
> > > > you have always had?  What is the
> composite video
> > source: a
> > > > VCR, a cable
> > > > convertor, or something else?
> > > > 
> > > > Regards,
> > > > Andy
> > > > 
> > > > 
> > > > > Thanks,
> > > > > Joe
> > > 
> > > 
> > > 
> > >       
> > > 
> > > _______________________________________________
> > > ivtv-users mailing list
> > > ivtv-users at ivtvdriver.org
> > > http://ivtvdriver.org/mailman/listinfo/ivtv-users
> > >
> 
> 
>       
> 
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> ivtv-users at ivtvdriver.org
> http://ivtvdriver.org/mailman/listinfo/ivtv-users
> 


      



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