[mythtv-users] Difficulty conceptualizing the relationship of Zap2it data and scanning for channels.
H P Ladds
householdwords at gmail.com
Fri May 26 15:34:06 UTC 2006
> No, all channel information is in the database in the channel table
(OT note -- I'm trying out the quote feature of g-mail -- just learning how
to use it in this post).
Thanks for the reply -- now I have a different set of questions as a result:
What purpose does the "scan for channels" serve if all the information is in
the channel database?
Does the database have a filename? Can I run a sed or awk on the database
and correct some errors in the listing info? (The listings are off by about
4 hours. Haven't truly delved into this issue yet and discovered what is
wrong -- but the programming info is way off).
Andrew might be interested in this topic as well.
Again thanks, Kevin. Your help genuinely appreciated.
On 5/25/06, Kevin Kuphal <kuphal at dls.net> wrote:
> H P Ladds wrote:
> > I am currently capturing HDTV OTA, and am having difficulty
> > conceptualizing the relationship between "scanning for channels" and
> > importing channel info. using Zap2it.
> > My assumptions:
> > 1. mythtv-setup>Input connections>"scan for channels" uses the capture
> > card to scan the airwaves for signals. When it finds a signal, Myth
> > records the information in a .conf file. After the information is
> > obtained, Myth references this .conf file and predisposes the capture
> > card to tune-in a specific channel(s) -- rather than scanning for
> > channels every time a user wishes to watch or record video content.
> No, all channel information is in the database in the channel table.
> > 2. The "mythfillmydatabase" command downloads a listing of when and on
> > what channel television programming will occur.
> > 3. Somehow MythTV cross references the info. obtain from Zap2it
> > "mythfillmydatabase" and From "scan for channels" to facilitate
> > recording.
> Yes. An xmltvid is inserted for each channel in the database which
> corresponds to the listings information from zap2it.
> > Put another way, the information obtained from "scan for channels" is
> > a list of hardware settings that tune in OTA stations. The information
> > obtained from Zap2it is a list of channel information. These separate
> > databases are indexed together to faciltate viewing and recording.
> > 4. However, when using a cablebox one should not use mythtv-setup's
> > "scan for channels" feature. Zap2It's information is used to populate
> > both (all?) databases.
> Because from a cablebox or standard cable/antenna source, the channel
> frequency information is a standard and populated from tables in the
> source code. OTA HDTV and other sources do not have this standard
> mapping and so the frequency information must be scanned for or imported.
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> mythtv-users at mythtv.org
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