[mythtv-users] Jason Beck's QAM guide Now on the Wiki

Daniel Walton dwalton at cisco.com
Fri Feb 3 16:05:35 UTC 2006


On Fri, 3 Feb 2006, Dylan R. Semler wrote:

>
> >- atscscan found 337 entries and so far I can lock onto everyone I've tried with
> >azap but I can't get mplayer to play any of them.  I've only tried about a half
> >dozen so I may just be unlucky but is it normal to be able to lock onto a
> >channel but not play it (it says it can't find a video stream)?  I downloaded
> >and compiled the latest version of mplayer but still no luck.
> >
> >
> This is normal.  Most of the channels you get will be encrypted, meaning
> that a signal is being transmitted at that frequency (so azap does lock
> on it), but it's encoded in a way that only the cable company's tuner
> boxes can decrypt.  You should at least be able to find your broadcast
> channels (NBC, CBS, FOX,...) coming in clearly over the cable and if
> you're lucky a few others.  You'll probably also get a bunch of music
> channels that aren't encrypted but mplayer and mythtv don't handle these
> well (I'm guessing because they only contain a few frames of video for
> each song).
> I wrote a very very crude bash script that calls player to determine if
> a channel is encrypted or not.  I hesitate to post I'm not a programmer
> and it'll need to be modified to fit each computer it runs on.  Let me
> know if you really want it though.

Please do, tuning 337 by hand will take me a while :)  I wrote a quick script to
convert my channels.conf file from:

[0002]:549000000:QAM_256:18:16:2
[0003]:549000000:QAM_256:20:21:3
[0004]:549000000:QAM_256:25:26:4
[0005]:549000000:QAM_256:28:29:5

to

ch500:549000000:QAM_256:18:16:2
ch501:549000000:QAM_256:20:21:3
ch502:549000000:QAM_256:25:26:4
ch503:549000000:QAM_256:28:29:5

that way I could do "azap -r ch500".  Maybe I can combine our scripts and post
the end result to the wiki.

Daniel

> >- atscscan didn't reveal channel names for any of the 337 channels.  I take it
> >this is info that my cable company isn't sending.  If I call my cable provider
> >what additional field of info should I ask them to transmit so that I can get
> >the channel names?  Time Warner Cable will probably just laugh at me when I ask
> >but it can't hurt to try :)
> >
> >
> I didn't get channel names either.  I went ahead and manually put them
> in which is not too amusing.
>
> >
> >Daniel
> >
> >On Wed, 1 Feb 2006, Steven Adeff wrote:
> >
> >
> >
> >>I've finished my initial writeup of Jason Beck's guide to the Wiki, it
> >>can be found at:
> >>http://www.mythtv.org/wiki/index.php/Adding_QAM_Channels_For_HDTV_Tuner_Cards
> >>
> >>I'd appreciate it if everyone that has used it, along with Jason
> >>himself to go over it and fix things up, etc. Before making any
> >>drastic changes though, please bring them up in the discussion area
> >>for the article and give it at least a day for people to respond.
> >>
> >>Thanks for the help everyone!
> >>--
> >>Steve
> >>_______________________________________________
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> >>mythtv-users at mythtv.org
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> >>
> >>
> >>
> >
> >
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> >
> >
> >
> >
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