[mythtv-users] HDTV reception via Cable
christian.burger at abtg.net
Fri Mar 24 17:50:24 UTC 2006
Date: Thu, 23 Mar 2006 17:50:33 -0500
From: "R. G. Newbury" <newbury at mandamus.org>
Subject: Re: [mythtv-users] HDTV reception via Cable
To: christian.burger at abtg.net, Discussion about mythtv
<mythtv-users at mythtv.org>
Message-ID: <44232639.2020701 at mandamus.org>
Content-Type: text/plain; charset=iso-8859-1; format=flowed
>Your use of the word sourceid here tells me that you are confused.
>dvbscan is supposed to list everything it can find. You have to figure
>out what is useable from that.
Sorry I meant service ID, not sourceid....
>Does the card show up at /dev/dvb/adapter0/dvr0? (If at /dev/video0
>then you are loading the wrong kernel module. Make yourself a dunce cap
>and wear it for 2 minutes in the bathroom with the lights out, as
>punishment for not reading this list properly!.
I am listed at /dev/dvb/adapter0/dvr0 so no dunce cap required here.
>Run dvbscan to make a channels.conf. Copy the summary section into a
>file and store it a ~/.azap/channels.conf
I did this but azap frequencylisthere > channels.conf
>If you can capture a channel stream using azap -r STATION to tune to the
>station, and 'cat /dev/dvr/adapter0/dvr0 > test.mpg' gives you something
>you can watch with mplayer (as in mplayer test.mpg) then the hardware
Well I did a similar but equal verification of:
Mplayer dvb://CHANNLENAME and it works as expected.
>Using atscscan or qamscan which are floating around, or just the hard
>way, find out which channels are unencrypted and usable. Spend even more
>time figuring out which channels they actually are...There is no real
>way (without the use of a set top box diagnostic) to find out that
>:571000000:20:21:24 is really WNUT or whatever, on channel 108.
Well, I did this the hardway, manually tuning each on in my channels.conf to
see which were usable and which weren't and what they were then updated
channels.conf to reflect.
>At labs.zap2it.com you set up (or should have) a channel lineup for your
>digital channels. You cannot really do that until you know which
>channels you can actually get, and want to get. I'll call that your
>'Charter Digital' lineup. You will probably have a Charter Analog lineup
>for channels below 72 (as numbered by Charter). The channel numbers
>above 72 mean absolutely nothing..they are just identifiers.
I kept this simple with the standard abc/nbc/cbs/etc, I have about 5
channels on my zap2it and also in my channels.conf while I iron things out.
>Once you have a lineup, make it one of your sources under mythtv-setup.
>I will presume you already have the analog lineup as the first entry.
>That means your Charter Digital lineup will be #2 and will therefore
>become sourceid=2. Mythfilldatabase will run (if you run mythtv-setup in
>a window you can move it and watch the underlying transaction going on).
Been there done that. No analog for me as I'm really on interested in
>Now associate your HD3000 card, 'TUNER' with Charter Digital. You can
>then see the channels listed in the channel editor section. Set the
>transmission type to ATSC. Exit mythtv-setup. Run mythfilldatabase
.(again) from the commandline. It will be quick.
It's an Aver A180 but same priniciple.
>Now, open the dtv_multiplex table in mysql. You will need to enter one
>row in the table for each frequency which is used for an active, usable
>channel in your channels.conf. The mplexid will be autoincremented as
>set as you do this. Therefore it is best to start with the lowest
>frequency and work up. When done, set the sourceid for all rows as
>sourceid=2 and the modulation as QAM_256 (or whatever Charter uses..).
I am familiar with this process also.
>Now open the channel table. Select each row by the callsign and check
>that it matches the channum and chanid you expect. The chanid should be
>2xxx where xxx is the Charter cable channel number. You will need to
>poke into each channel's row, the mplexid number for the frequency, set
>the sourceid (if not properly set) and set the serviceid equal to the
.last number (the pid) of the line in your channels.conf for that
>channel. The pid is the identifier of the digital stream on the
>frequency. You may also want to play with the icons, name etc.
This is where something isn't right for me. The pid is what is giving me
problems I think. When I run the dvbscan -c while tuned with azap -r
CHANNEL I get a list of like 50 pid's. I just saw someone updated the A180
wiki entry so I think I am going to scrap all my settings start from scratch
and see what happens this go round, 3rd times the charm eh?
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