[mythtv-users] need help with station rescan after frequency change

[DaveD]

On 7/3/20 10:01 AM, Tom Dexter wrote:
> On 6/30/20, James Abernathy <jfabernathy at gmail.com> wrote:
>> Last year all but one of my local OTA TV stations changed frequencies as a
>> part of the FCC repacking of the USA OTA channels.
>>
>> Today the last one switched.   I can't remember exactly what I did last
>> year, but I remember it was simple. I tried on my development v31 FE/BE
>> combo to make sure I had it right before I did anything with my production
>> backend.
>>
>> I failed on the initial test.  All I did was use mythtv-setup and in the
>> input connections I did a scan and updated all channels. I still could not
>> receive the channel that moved.
>>
>> 1. Do I have to reconfigure XMLTV?  I use tv_grab_zz_sdjson-sqlite. The
>> channel that moved is still called the same thing.
>> 2. I have a mixture of HDHR and Hauppauge WinTV Quad PCIe tuners
>>
>> Jim A
>>
>> BTW I did the rescan on a real TV and it found the new channel
>>
> For me, channel scanning in MythTV has ALWAYS been a total nightmare,
> most notably when you end up with a new id for an existing channel and
> your recorded history becomes a total mess.
>
> I'm in New Jersey and in fact I just had PBS channel 13.1 move
> frequencies. I change those with a very nice perl script that I have
> attached here:
>
> https://lists.gt.net/mythtv/users/626354#626354
>
> That post describes how you can use it based on the output of an
> hdhomerun_config scan. That simply changes the dtv_multiplex of the
> exiting channel in place and is capable of creating the dtv_multiplex
> is needed.
>
> Note that I also have a script for adding channels. That one doesn't
> create dtv_multiplex but that can be done with the above script.
>
> This is the ONLY way I ever do this.
>
> Tom

Thank you for the post/info/script.  Would you be willing to post the 
other one you mentioned to add a channel?

Dave D.