[mythtv-users] [Solved] Debugging hdhomerun - can I record the same show from multiple tuners in duplicate?

[Ram Ramesh]

On 2/26/23 22:17, Ram Ramesh wrote:
> On 2/26/23 21:29, Stephen Worthington wrote:
>> Recording rules do have an option to set the "Preferred Input". If
>> you edit a recording rule, go to Schedule Options and change the
>> second selection box from "Use Any Available Input" to the input you
>> want it to use.  If the preferred input is not available due to using
>> it causing a scheduling clash, I believe the scheduler will then use a
>> different input, but I have never actually had that happen as I have
>> too many tuners to get many clashes.
>>
>> It is difficult to create two normal recording rules to record the
>> same programme.  The only way I can think of is to use one of the API
>> interfaces, such as the Services API, to create the second rule.  If
>> you try from the GUI, you only get offered the option of editing the
>> current rule, and it may be that the Services API will reject creating
>> a second rule for the same showing.  The only way to find out would be
>> to try.
>>
>> However, you can create two manual recording rules for the same time
>> period on the same channel.  Mythfrontend > Schedule Recordings >
>> Manual Schedule, then create two manual recording rules with the same
>> settings, but give them different titles.  On the second page of the
>> settings there, use the Schedule Options to set them to use different
>> inputs.
>>
>> To see which tuner was used for any recording, in mythfrontend go to
>> the recording and press the I (Info) key twice.  Then scroll down if
>> necessary until you see the "Recording Input" field.  This is the
>> capturecard.displayname field from the database.  I have manually set
>> all of mine so that the different virtual tuners can be distinguished,
>> but the defaults should show which physical tuner was used.
>>
>> In the mythbackend.log file you can find a report line for each
>> recording that is written at the end of the recording which will tell
>> you the recording's status and the virtual tuner number
>> (cardinput.cardid):
>>
>> cd /var/log/mythtv
>> grep "overall_score=" mythbackend.log
>>
>> A good recording should look like this:
>>
>> Feb 27 16:04:00 mypvr mythbackend: mythbackend[1446471]: I TVRecEvent
>> tv_rec.cpp:856 (FinishedRecording) TVRec[11]:
>> FinishedRecording(1003_2023-02-27T01:58:00Z) good
>> recq:#012<RecordingQuality overall_score="1"
>> key="1003_2023-02-27T01:58:00Z" continuity_error_count="0"
>> packet_count="17913081" />
>>
>> That is all one long line in the log - my email client wraps long
>> lines.  The virtual tuner number is the [11] after "TVRec".
>>
>> And this is what I got for a bad recording recently:
>>
>> Feb  1 22:34:00 mypvr mythbackend: mythbackend[105007]: I TVRecEvent
>> tv_rec.cpp:841 (FinishedRecording) TVRec[94]:
>> FinishedRecording(10070_2023-02-01T07:29:00Z) damaged
>> recq:#012<RecordingQuality overall_score="0.8"
>> key="10070_2023-02-01T07:29:00Z" continuity_error_count="45265"
>> packet_count="25817462" />
>>
>> I think I had rain fade on my satellite dish that day.
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>
> Stephen,
>
>   Thanks for the detail. I have one other question regarding this. 
> What happens if my backend is always on and the tuner gets a new IP on 
> DHCP? Will backend not find the tuner and give up on recording? What 
> happens if the same happens during a recording is in progress?
>
> I noticed that my broken recordings are really missing files meaning 
> no recording was made at all. I am wondering if this has to do with 
> missing tuner
>
> Regards
> Ramesh

After a bit more experimentation, I realized that my second hdhomerun 
was on DHCP getting dynamic IPs.  My backend being on all the time had a 
hit and miss on the IP address resulting in missing recording 
completely. I remember putting my hdhomerun under static IP assignments, 
but it appears in some accidental editing, I made a typo in ethernet 
address of hdhomerun, and this made my server switch to dynamic IP. Once 
I fixed the issue, and rebooted relevant machines, static assignment 
happened and since then my backend has been consistently recording fine 
from this unit. So, no longer I have this issue.

Thanks for everyone's help in guiding me to check for relevant 
configurations/scripts/resources in debugging this issue.

Regards
Ramesh

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