On Saturday 29 November 2008 14:39:22 Karol Marek Zapolski wrote:
> On Thu, Nov 20, 2008 at 12:11 PM, Hans Verkuil <[EMAIL PROTECTED]>
wrote:
> > On Thursday 20 November 2008 17:06:36 Karol Marek Zapolski wrote:
> > > On Thu, Nov 20, 2008 at 2:27 AM, Hans Verkuil
> > > <[EMAIL PROTECTED]>
> >
> > wrote:
> > > > On Wednesday 19 November 2008 20:32:04 Karol Zapolski wrote:
> > > > > On Wed, Nov 19, 2008 at 2:18 AM, Hans Verkuil
> > > > > <[EMAIL PROTECTED]>
> > > >
> > > > wrote:
> > > > > > On Wednesday 19 November 2008 02:58:12 Karol Zapolski wrote:
> > > > > > > On Tue, Nov 18, 2008 at 2:01 AM, Hans Verkuil
> > > > > > > <[EMAIL PROTECTED]>
> > > > > >
> > > > > > wrote:
> > > > > > > > On Tuesday 18 November 2008 00:54:16 Karol Marek
> > > > > > > > Zapolski
> >
> > wrote:
> > > > > > > > > Hello,
> > > > > > > > >
> > > > > > > > > I have problems capturing closed captioning while
> > > > > > > > > recording video.
> > > > > > > > >
> > > > > > > > > If I record just cctext without recording video - it
> > > > > > > > > looks fine..
> > > > > > > > >
> > > > > > > > > However recording video and cctext gives me broken
> > > > > > > > > text..
> > > > > > > > >
> > > > > > > > > It looks like it's missing letters..
> > > > > > > > >
> > > > > > > > > I tried various drivers version under various kernels
> > > > > > > > > (I'm using fedora)
> > > > > > > >
> > > > > > > > It's fixed in kernel 2.6.27.
> > > > > > > >
> > > > > > > > Regards,
> > > > > > > >
> > > > > > > > Hans
> > > > > > >
> > > > > > > Hans,
> > > > > > >
> > > > > > > I'm still experiencing same problems with 2.6.27 kernel
> > > > > >
> > > > > > Hmm, no one else ever reported similar problems so this
> > > > > > surprises me. It was tested pretty thoroughly at the time.
> > > > > >
> > > > > > Can you try with the 'bleeding edge' driver? Instructions
> > > > > > are here:
> > > > > > http://www.ivtvdriver.org/index.php/Download#Bleeding_Edge_
> > > > > >driv er
> > > > > >
> > > > > > What sort of PC do you have? In particular, which chipset
> > > > > > does it have?
> > > > > >
> > > > > > Regards,
> > > > > >
> > > > > > Hans
> > > > >
> > > > > It still the same thing - I used latest firmware and drivers
> > > > > as you recomended
> > > > >
> > > > > The machine has on Supermicro motherboard, 2GB of RAM, 4 x
> > > > > 500GB drives Raid5
> > > > > and 4 PVR-150 cards
> > > >
> > > > How do you test this?
> > > >
> > > > Can you also try to do this:
> > > >
> > > > In one shell run:
> > > >
> > > > vbi -d /dev/vbi0
> > > >
> > > > (the vbi tool is part of the ivtv-utils:
> > > > http://dl.ivtvdriver.org/ivtv/archive/1.3.x/ivtv-utils-1.3.0.ta
> > > >r.gz )
> > > >
> > > > In the other shell run:
> > > >
> > > > cat /dev/video0 >/dev/null
> > > >
> > > > And does this problem happen for all four PVR-150 cards?
> > > >
> > > > If you still experience the same problems with the above test,
> > > > then I'm afraid I need an account. I'm not guaranteeing
> > > > anything, BTW. VBI is really difficult to implement and it's
> > > > rather depressing for me to still have cases where it is
> > > > apparently not working well.
> > > >
> > > > Regards,
> > > >
> > > > Hans
> > >
> > > Hans,
> > >
> > > My apologies... It works great with Your vbi tool - I did not
> > > know about this tool.
> > > I was checking it with zvbi-ntsc-cc...
> > >
> > > And just for the records it was happening on all 4 cards (btw. I
> > > have more then 1 machine with haupauge cards)
> > >
> > > Anyway - If you need account with one or multiple haupauge cards
> > > (pvr150/350/500 or hvr1600/1800/1250 and other ) I will be happy
> > > to give it to you
> > >
> > > Thank you very much for your help...
> >
> > You're welcome. You've made my day, I really wasn't looking forward
> > to wrestling with this yet again! :-)
> >
> > Regards,
> >
> > Hans
>
> Hans,
>
> I found 2 things that could be fixed...
>
> 1. When I run vbi - I see from time to time (but very rare) single
> characters to be missing - it's acceptable (at least for me) - I used
> following methodology :
>
> - I'm using server with 4 low profile PVR-150
>
> 1st card :
> - Start capture video on 1st card with cat /dev/video0
> - Start capture cctext using vbi -d /dev/vbi0
>
> 2nd card :
> - No video capturing
> - Start capture cctext using zvbi-ntsc-cc -s -c -d /dev/vbi1
>
> - comparing line after line on 2 screen sessions
If you do no video capture on the first card but only capture with the
vbi tool, do you still see the same difference? In that case it is
related to the video chip that sometimes fails to find a CC packet.
Perhaps a stronger signal will help, but it could be just inherent to
the chip.
If it is related to whether video capture takes place or not, then
that's pretty much the end of the line. I don't dare touch that code.
The root cause is that I suspect a buggy firmware when it comes to VBI.
It seems to work fine for most people and I'm not going to change it.
> 2 More annoying - vbi stops capturing cctext after 20-30 min...
Any messages in the kernel log? Never heard of this before. I've
definitely done long term tests with the vbi tool in the past without
problems.
Regards,
Hans
--
Hans Verkuil - video4linux developer - sponsored by TANDBERG
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