[mythtv-users] How do you "tune" subchannels in QAM?

[Adam Gianola]

Taylor, sounds like I'm in the same boat as Marc.  I've got Comcast in
Denver, CO area.  I can get unencrypted channels on several
frequencies, two for example are
channel 18 147000000 Hz - CBS-HD
channel 119  765000000 Hz - ABC-HD

dvbsnoop 0x1FFB just hangs until ctrl-C on either frequency.

I suspected that something more should be coming through and that was
why I had bad luck with the mythtvsetup channel scan, thanks for
confirming this.  Is there a possible workaround in the mean time for
adding channels so I can record / watch live?  The manual adding of
channels to the database (as per Marc's post above) seems to do ok,
but it certainly isn't perfect.  Someone else who has working hd over
qam (with hd3000) shared entries from their channels table with me
which seem to have some different entries than are listed above (ie
some entries which are null in Marc's post shouldn't be).  When I get
some time to sort through it, I'll post later with any insights I'm
able to find.

Cheers,
Adam


> -----Original Message-----
> From: mythtv-users-bounces at mythtv.org
> [mailto:mythtv-users-bounces at mythtv.org] On Behalf Of Taylor Jacob
> Sent: Friday, April 01, 2005 1:19 PM
> To: Adam Gianola; Discussion about mythtv
> Subject: Re: [mythtv-users] How do you "tune" subchannels in QAM?
> 
> I skim this list once a week or so, so I sorry I didn't see this before..
> 
> Whomever it was having the problem I need the following questions answered:
> 
> 1. What cable carrier are you using?
> 2. Do you know what frequencies you can get unencrpyted channels on?
> 3. If you know the answer to number 2, can you please tune to these with
> azap
> and run dvbsnoop 0x1FFB and let me know if you get anything back.
> 
> What it sounds like is:
> 
> Mpeg Transport spec defines the PAT & PMT which is what all these posts are
> talking about reading and getting video..
> 
> DVB and ATSC have another layer on top of this called SI (PSIP in ATSC).. If
> your cable carrier has unencrypted digital cable channels they are supposed
> to
> be sending ATSC PSIP, but it sounds like yours is not.. I really didn't want
> to
> make a digital cable scan that just looked at the PAT and PMT  since you
> will
> not get channel names, or anything useful from just the PAT & PMT.
> 
> Taylor
> 
> _______________________________________________
> mythtv-users mailing list
> mythtv-users at mythtv.org
> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
> 
> 
> _______________________________________________
> mythtv-users mailing list
> mythtv-users at mythtv.org
> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
> 
> 
>