[mythtvnz] No EPG, what am i doing wrong

[Curtis Walker]

On Sat, 9 Apr 2022 at 21:51, Stephen Worthington
<stephen_agent at jsw.gen.nz> wrote:
>
> On Sat, 9 Apr 2022 20:00:31 +1200, you wrote:
>
> >Almost success!
> >
> >I updated the xmltv ID's in mythtv-setup's channel editor - you were
> >right - several were missing / out of date. I used your 'source1.txt'
> >as a reference.
> >
> >I then managed to get mhegepgsnoop.py working - turned out I didn't
> >have my sql database password correct (sigh).
> >
> >A "tvguide.xml" file was generated, and successfully imported all data
> >into mythtv's guide with mythfilldatabase - yay!
> >
> >The next piece was using do_mhegepgsnoop2.sh to run processing with
> >xmltv-proc-nz.
> >
> >Running do_mhegepgsnoop2.sh, I get a 'listings-mheg5.xml.gz' file in
> >'/var/www/html/epg', but as it's been gzipped, the script fails with
> >"chmod: cannot access '/var/www/html/epg/listings-mheg5.xml': No such
> >file or directory".
> >
> >I see the do_mhegepgsnoop2. sh script runs 'gzip $OUTPUT_FILE'. If I
> >comment out this line, it appears to run, finishing with "Running
> >xmltv-proc-nz on the MHEG5 data", but then it leaves the
> >'listings-mheg5.xml file unzipped, which is fine, because
> >mythfilldatabase can use that as its source file directly.
> >
> >Thanks Stephen!
>
> Yes, the gzipped file is if you are using tv_grab_nz-py to download it
> from your web server.  That expects a gzipped file and unpacks it. You
> are directly running mythfilldatabase, so you need the non-gzipped
> .xml file.
>
> The chmod error is a bug on my part.  When I added the gzip command, I
> forgot to change the file name for chmod also.  I have updated
> do_mhegepgsnoop2.sh on my web server.  In your case, you have now
> commented out the gzip line so you do not need to change the chmod
> line.  So it is now working properly for you.
>
> So all you need to do now is to schedule do_mhegepgsnoop2.sh to be run
> at least daily.  It is best to do that at a time when MythTV is less
> likely to be starting a recording, so I do it at 10 past the hour.  At
> present I am running my EPG updates at 15:10 each day.  You can do
> that by just adding a line to /etc/crontab, or if you want to do it
> the right way these days and use systemd, you can create two systemd
> units in /etc/systemd/system to do it:
>
> File /etc/systemd/system/epg.service:
>
> [Unit]
> Description=Get MHEG5 EPG for MythTV
> After=mythtv-backend.service
>
> [Service]
> ExecStart=/bin/bash -c "/usr/local/bin/do_mhegepgsnoop2.sh"
>
> [Install]
> WantedBy=multi-user.target
>
>
> File /etc/systemd/system/epg.timer:
>
> [Unit]
> Description=Get MHEG5 EPG for MythTV daily at 15:10
>
> [Timer]
> OnCalendar=15:10:00
> Persistent=true
>
> [Install]
> WantedBy=timers.target
>
>
> Make both files chown root:root and chmod u=rw,g=r,o=r.  Then run
> these commands:
>
> sudo systemctl daemon-reload
> sudo systemctl enable epg.timer
>
> Do not do systemctl enable epg.service - if you do that, the EPG will
> be run every time the PC is booted, rather than just at the right
> time.  If you want to manually run the EPG, do this:
>
> sudo systemctl start epg
>
> That will run epg.service once.  To see the log output from
> epg.service, run:
>
> sudo journalctl -eu epg
>
> It will also be logged to /var/log/syslog.
>
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Really helpful & reassuring thanks Stephen.

Yes, I'm a bit old school, so do_mhegepgsnoop2 is running in a cron
job, as you say, just after the hour, then 5 minutes later my update
script runs mythfilldatabase, pointing to the fresh .xml file.

That said, because I often don't have my mythtv box running these days
(it does triple boot duty), I might run it as a startup service
anyway.

Good stuff!