[mythtv-users] [mythtv] saa7134 vbi problem ?
mythtv at barnasconi.net
Wed Sep 5 21:20:16 UTC 2007
On Monday 27 August 2007 09:53:45 marek wrote:
> Hi group
> i have problem with VBI/Pal teletext in mythtv
> Hardware :
> geniatech DVB-S (cx88) looks like :
> cx88: subsystem: 14f1:0084, board: Geniatech DVB-S
> cx88: TV tuner type 4, Radio tuner type -1
> cx88/0: registered device video3 [v4l2]
> cx88/0: registered device vbi3
> cx88/2: cx2388x dvb driver version 0.0.6 loaded
> cx88/2: registering cx8802 driver, type: dvb access: shared
> cx88/2: subsystem: 14f1:0084, board: Geniatech DVB-S [card=52]
> cx88/2: cx2388x based DVB/ATSC card
> KNC One TV Station DVR
> saa7134: subsystem: 1894:a006, board: KNC One TV-Station DVR
> tuner 0-0060: type set to 38 (Philips PAL/SECAM multi (FM1216ME MK3))
> saa6752hs 0-0020: saa6752hs: chip found @ 0x40
> saa7134: registered device video1 [v4l2]
> saa7134: registered device vbi1
> saa7134: registered device radio1
> saa7134 ALSA driver for DMA sound loaded
> saa7134/alsa: saa7134 at 0xfdeffc00 irq 17 registered as card 1
> saa7134: registered device video0 [mpeg]
> so it looks rather ok.
> I can watch, record, switch between channels, inputs, etc
> but when I try menu -> toggle teletext menu - see "P100 Page not
> available" on every channel - source independent.
> all analog channels have very good signal - when I use tvtime for
> watching analog tv - and alevt for teletext it works without problems
> (but alevt needs patch for using it with saa7134 - without this patch it
> can't decode vbi data - look at this patch here :
> http://marc.info/?l=linux-video&m=104135131408201&w=2), cat /dev/vbi1
> shows data stream..
the 'analog' teletext is not captured from /dev/vbi but is decoded from the
MPEG stream. This is true for PVR/IVTV-based cards and DVB cards.
> mythtv-setup has vbi inputs properly configured (for saa7134 /dev/vbi1,
> fuser /dev/vbi1 while watching analog shows /dev/vbi1 is used by
> Logs doesn't show any VBI problem
For which stream are you trying to capture vbi? Pure
analog cards (without MPEG encoder/output) are not supported.
> Maybe this is sth. wrong with decoding (v4l2 or saa7134 related?) or
> maybe I miss something - how i can debug this ?
you could check with -v vbi
> Marek K.
> mythtv-dev mailing list
> mythtv-dev at mythtv.org
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