[mythtv-users] Trying to understand the multiplex values
Harry Devine
lifter89 at comcast.net
Tue Dec 18 02:56:36 UTC 2007
Hello everyone,
I've been having trouble getting my Myth box to tune all of the channels
that is being provided by Comcast. I just upgraded to the SVN build as
of 11/19/07, and tonight I thought I'd go through the effort of
re-scanning my channels to see if my luck has improved. I have my
system set to NTSC for TV Format, us-cable as my frequency table (in
mythtv-setup), and when I scan my channels on QAM-256 using the Cable
frequency table, I get alot of channels that are named UNKNOWN108#5, etc.
Now, taking that channel as an example, I'm trying to figure out what
the relationship is between the information for that channel in the
channel table and the dtv_multiplex table. For this channel, I see the
following (I'm only showing the relevant columns):
chanid channum freqid sourceid callsign
mplexid serviceid
2112 108#5 108 1 UNKNOWN108#5 67 11
For the dtv_multiplex table, I see the following information:
mplexid sourceid frequency modulation sistandard
67 1 699000000 qam_256 atsc
How does all of this information tie together? How can I use what I'm
seeing here to determine what channels I have so I can rename them
properly (i.e. Channel 231 is my local HD ABC channel). I recall
reading in some post a while back that the mplexid somehow ties this all
together. I just can't seem to figure out what the missing link is here
in my case.
Any ideas or "pearls of wisdom"?
Thanks,
Harry
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