[mythtv-users] channel musical chairs

[Ross Boylan]

Thank you, Stephen and Gary, for all the info.  If I don't run a
rescan or use my external program to make modifications, I'm still not
clear on what happens.

I have been assuming that the program guide, backed by info from SD,
is accurate (except for glitches, and perhaps delays catching up to
channel redefinitions).  Accurate means the programs listed on, e.g.,
4.3 are what I'd actually see if I tuned to 4.3.  Less importantly, it
means the callsign and icon are accurate.  But is any of that true?
For example, if the xmltvid is not updated, and if that's the key for
matching SD, then I'd be getting a listing for something that might be
showing on a different channel, or not at all.  @Gary says that
sometimes SD will continue to use the same xmltvid, in which case a
mismatch on that would not be a problem.  But that also means that
sometimes it changes, and then what happens in mythtv?

The interpretation of "same channel" as "same callsign" explains why
sometimes I will try to limit recording to, e.g., 11.1, and I end up
getting double recordings on 11.1 and 11.3: they have the same
callsign. (Actually, slightly different: "KNTV HD" vs "KNTV-HD".  But
I think I've had this problem with that pair).

BTW, the changes to virtual channel 4 are definitely part of an ATSC
3.0 move.  And 44.5 already has a date/time in channel.deleted.  I
used the Services API Channel/RemoveDBChannel to do that, which must
mean it didn't get deleted on its own or via an update from SD.

Ross