MythTV and the Freeview Retune

Mike — Wed, 30 Sep 2009 20:45:32 +0000

Spent a couple of hours trying to get MythTV back up and running tonight after the Freeview retune. A simple “Minimal changes” retune left a number of channels with broken duplicates and several more in a state that seemed to be able to crash the front-end. After determining that deleting all channels and starting again was going to a) be easier, and b) not trash all the recording schedules, I decided to go down that route. This was more promising, but many of the channels now had junk LCNs (channel number), and the EPG was completely screwed up. It seems that there is cached channel data left in the database which gets in the way when mythtv-setup rebuilds the line-up. The following worked for me (this is on the 0.21 packages in Ubuntu 8.04.3; 0.22 might not be an issue):

Run mythtv-setup
Go to the Channel Editor
Delete all channels (only on DVB-T/Freeview if you use e.g. Freesat as well)
Quit mythtv-setup, ignoring any warnings about cards starting on non-existent channels
Run mythfilldatabase
Run mythtv-setup again
Go to Channel Editor
Do a full rescan using your preferred method (I imported channels.conf from an earlier run of scan)
Quit mythtv-setup
Run mythfilldatabase once more

Now the channel line-up was back to normal and the EPG filled in correctly, but there were a couple of recording schedules on E4 that had jumped to E4+1. This was easily fixed with a SQL one-liner (back up the database first!):

UPDATE record SET chanid=”2028″ WHERE chanid=”2029″;

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MythTV and the Freeview Retune