<div><blockquote style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;" class="gmail_quote">No, all channel information is in the database in the channel table</blockquote>(OT note -- I'm trying out the quote feature of g-mail -- just learning how to use it in this post).
<br><br>Thanks for the reply -- now I have a different set of questions as a result:<br><br>What purpose does the "scan for channels" serve if all the information is in the channel database?<br><br>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).
<br><br>Andrew might be interested in this topic as well. <br><br>Again thanks, Kevin. Your help genuinely appreciated.<br><br><br></div><br><br><div><span class="gmail_quote">On 5/25/06, <b class="gmail_sendername">Kevin Kuphal
</b> <<a href="mailto:kuphal@dls.net">kuphal@dls.net</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">H P Ladds wrote:
<br>> I am currently capturing HDTV OTA, and am having difficulty<br>> conceptualizing the relationship between "scanning for channels" and<br>> importing channel info. using Zap2it.<br>><br>> My assumptions:
<br>><br>> 1. mythtv-setup>Input connections>"scan for channels" uses the capture<br>> card to scan the airwaves for signals. When it finds a signal, Myth<br>> records the information in a .conf file. After the information is
<br>> obtained, Myth references this .conf file and predisposes the capture<br>> card to tune-in a specific channel(s) -- rather than scanning for<br>> channels every time a user wishes to watch or record video content.
<br>No, all channel information is in the database in the channel table.<br>><br>> 2. The "mythfillmydatabase" command downloads a listing of when and on<br>> what channel television programming will occur.
<br>True<br>><br>> 3. Somehow MythTV cross references the info. obtain from Zap2it<br>> "mythfillmydatabase" and From "scan for channels" to facilitate<br>> recording.<br>Yes. An xmltvid is inserted for each channel in the database which
<br>corresponds to the listings information from zap2it.<br>><br>> Put another way, the information obtained from "scan for channels" is<br>> a list of hardware settings that tune in OTA stations. The information
<br>> obtained from Zap2it is a list of channel information. These separate<br>> databases are indexed together to faciltate viewing and recording.<br>><br>> 4. However, when using a cablebox one should not use mythtv-setup's
<br>> "scan for channels" feature. Zap2It's information is used to populate<br>> both (all?) databases.<br>Because from a cablebox or standard cable/antenna source, the channel<br>frequency information is a standard and populated from tables in the
<br>source code. OTA HDTV and other sources do not have this standard<br>mapping and so the frequency information must be scanned for or imported.<br><br>Kevin<br><br><br>_______________________________________________<br>
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