[mythtv-users] Missing DVB channel scan for ASTC Air2PC cards

Aran Cox spin667 at mchsi.com
Thu Apr 21 22:39:27 UTC 2005


On Tue, Apr 19, 2005 at 08:02:08AM -0500, Trey Boudreau wrote:
> On Tue, Apr 19, 2005 at 11:04:26AM +0100, John Pullan wrote:
> > 
> > On 4/19/05, Trey Boudreau <trey at treysoft.com> wrote:
> > > 
> > > Prior to 0.18, it seems that the recommended action involved scanning
> > > for the channels in mythtv-setup.  Unfortunately, CVS (as of midnight
> > > Central time, U.S.) doesn't seem to have this feature.
> > 
> > What do you mean by "doesn't seem to have this feature." ?
> >
> I can't find any screen anywhere in myth-setup that will allow me to
> perform a "channel scan".
> 
> > Are you sure you've enabled DVB support in this build.
> > 
> I think so:
> 
> mythtv$ ./configure --enable-dvb --enable-proc-opt
> ...
> DVB support      yes [/usr/src/linux-2.6.11-gentoo-r6/include]
> ...
> 
> config.h:
> 	#define FFMPEG_CONFIGURATION " --enable-dvb --enable-proc-opt "
> 
> config.mak:
> 	CCONFIG= linux backend release using_oss using_alsa using_arts using_ivtv using_joystick_menu using_dvb using_x11 using_xv using_xrandr
> config
> 
> mythtv-setup lets me choose the DVB card type and seems to properly
> identify the Air2PC cards as "Nextwave nxt2002 VSB/QAM frontend
> ATSC".  I just can't get the cards to tune with MythTV.  'azap' from the
> dvb-apps/dvb-kernel tar-ball indicates a solid signal lock:
> 
>  mythtv $ azap -a 0 KHOU
>  using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
>  tuning to 575000000 Hz
>  video pid 0x0000, audio pid 0x0000
>  status 1f | signal fd10 | snr e2a6 | ber 000001e0 | unc 00000000 | FE_HAS_LOCK
>  status 1f | signal fd60 | snr e248 | ber 00000058 | unc 00000000 | FE_HAS_LOCK
>  status 1f | signal fc40 | snr e100 | ber 00000000 | unc 00000000 | FE_HAS_LOCK
>  status 1f | signal fd10 | snr e2d6 | ber 00000000 | unc 00000000 | FE_HAS_LOCK
>  status 1f | signal fd20 | snr e18c | ber 00000000 | unc 00000000 | FE_HAS_LOCK
> 
> Thanks,
> -- Trey

Something similar happened to me.  I was using pre-0.18 mythtv and had
channel scanning, dvb, etc. everything I needed to use my HD cards.

However, when I upgraded to 0.18 I nuked my channel information with
the intention of re-scanning.  But I didn't have the scan option any
more!  I was sure configure had reported dvb yes, just like it had
previously.  I ended up doing a make distclean and rebuilding and
there they were.  I suspected some bug that caused configure to report
it had found what it needed for dvb support, but hadn't or didn't
enable it due to some other reason.  (Or I just read it wrong, or
didn't read it at all.)  In any case, I'd just try rebuilding,
double-checking your dvb-path setting and make sure that you see
USING_DVB in the g++ commands being spit out by make.

Aran


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