Re: USB devices supporting raw or sliced VBI for closed captioning?

[hermann pitton <hermann-pitton@arcor.de>]

Am Samstag, den 01.08.2009, 03:45 +0200 schrieb Markus Rechberger:
> Hi,
> 
> On Sat, Aug 1, 2009 at 1:20 AM, Steve Castellotti<sc@eyemagnet.com> wrote:
> >
> >        I was wondering if anyone could please point me at a list or similar
> > resource for USB capture devices which support raw (or sliced) VBI
> > access for producing a closed caption transcript through software such
> > as zbvi-ntsc-cc or ccextractor? Specifically I'm wanting a device
> > capable of S-Video, Composite, or even Component input, not just ATSC,
> > as most USB devices seem focused around these days.
> >
> >        I've managed to get this working with various ivtv and saa713x based
> > PCI devices, but aren't aware of any USB implementations of chipsets
> > which use those drivers.
> >
> >
> >        Searching online, I found this archived message:
> >
> > http://lists.zerezo.com/video4linux/msg16402.html
> >
> > which states:
> >
> >> some em2840 and newer devices are able to capture raw vbi in
> >> linux (sliced vbi isn't possible yet)
> >> em2820, em2800, em2750 do not support vbi at all.
> >
> >
> >        Checking the em28xx driver homepage for recent models, I found this
> > entry:
> >
> > http://mcentral.de/wiki/index.php5/Em2880
> >
> >> officially the em2880 is em2840 + DVB_T
> >
> >
> >        which implies that not only is the "em2880" series a "newer" device,
> > but it should in fact already contain the "em2840" chip specifically
> > mentioned.
> >
> >
> >        Later on that same page, in the list of devices:
> >
> > ATI/AMD TV Wonder 600
> >
> >
> >        and on the manufacturer's page:
> >
> > http://ati.amd.com/products/tvwonder600/usb/index.html
> >
> >
> >        Under the list of "Input Connectors":
> >
> >> S-video input with adapter
> >
> >
> >
> >        Picking up one of these devices, I attempted to tune into the S-Video
> > feed and check the /dev/vbi0 device, but received the same error message
> > as I do with all other em28xx devices encountered thus far:
> >
> >> Cannot capture vbi data with v4l interface:
> >> /dev/vbi0 (AMD ATI TV Wonder HD 600) is not a raw vbi device.
> >
> >
> >
> >        Can anyone please point me in the right direction?
> >
> >        I would much prefer to be certain the next purchase is supported.
> >
> >
> >
> > Thanks!
> >
> 
> we do support Raw VBI for our devices, Sundtek MediaTV Pro for closed
> captioning.
> Alternatively we also have full support for ATSC-analogTV USB devices
> for the US market ([em288x]-[AVFB4910]-[Trident drx-J]-[tda18271]) the
> european product which we are selling is also capable of decoding NTSC
> closed caption.
> 
> http://sundtek.de/shop/Digital-TV-Sticks-oxid/Sundtek-MediaTV-Pro.html
> (this is just the information about the
> European/DVB-T/DVB-C/analogTV(raw VBI) device, we do not have the
> US/ATSC/analogTV(rawVBI) product listed there, although we do offer it
> to business customers) We support it from Linux 2.6.15 on.
> 
> Best Regards,
> Markus Rechberger

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