[mythtv-users] How to find the input used in a recording?

[Klaas de Waal]

Hi Ram,

To figure out which tuner did which recording you can do the following:

1. Get a list of the tuners (capture cards) with the following SQL command:
MariaDB [mythconverg]> select
cardid,parentid,videodevice,displayname,sourceid from capturecard;
+--------+----------+-----------------------------+-------------+----------+
| cardid | parentid | videodevice                 | displayname | sourceid |
+--------+----------+-----------------------------+-------------+----------+
|      1 |        0 | /dev/dvb/adapter0/frontend0 | K0          |        1 |
|      2 |        0 | /dev/dvb/adapter1/frontend0 | K1          |        1 |
|      3 |        0 | /dev/dvb/adapter2/frontend0 | K2          |        1 |
|      4 |        0 | 141013C6                    | H0          |        4 |
|      5 |        0 | 141013C6                    | H1          |        4 |
|      6 |        0 | 141013C6                    | H2          |        4 |
|     16 |        1 | /dev/dvb/adapter0/frontend0 | K0          |        1 |
|     17 |        2 | /dev/dvb/adapter1/frontend0 | K1          |        1 |
|     18 |        3 | /dev/dvb/adapter2/frontend0 | K2          |        1 |
|     19 |        4 | 141013C6                    | H0          |        4 |
|     20 |        5 | 141013C6                    | H1          |        4 |
|     21 |        6 | 141013C6                    | H2          |        4 |
|     22 |        4 | 141013C6                    | H0          |        4 |
|     23 |        5 | 141013C6                    | H1          |        4 |
|     24 |        0 | 1410F45C                    | HDHR        |        4 |
|     25 |        2 | /dev/dvb/adapter1/frontend0 | K1          |        1 |
|     26 |        5 | 141013C6                    | H1          |        4 |
|     27 |        5 | 141013C6                    | H1          |        4 |
|     28 |        1 | /dev/dvb/adapter0/frontend0 | K0          |        1 |
+--------+----------+-----------------------------+-------------+----------+

The third column identifies the HDHomeRun device.
The first column identifies the tuner (capture card) and this number is
used in the mythbackend logs.

2. Get the relevant lines from the mythbackend log, eg.:

> grep continuity_error_count mythbackend.log

This will give output like this:
2020-10-24 13:05:00.041774 I  TVRec[16]:
FinishedRecording(10411_2020-10-24T09:42:00Z) good recq:<RecordingQuality
overall_score="1" key="10411_2020-10-24T09:42:00Z"
continuity_error_count="0" packet_count="36666066" />
2020-10-24 13:25:00.466228 I  TVRec[4]:
FinishedRecording(119043_2020-10-24T09:52:00Z) good recq:<RecordingQuality
overall_score="1" key="119043_2020-10-24T09:52:00Z"
continuity_error_count="0" packet_count="44032547" />
2020-10-24 13:30:01.214219 I  TVRec[1]:
FinishedRecording(10411_2020-10-24T10:42:00Z) good recq:<RecordingQuality
overall_score="1" key="10411_2020-10-24T10:42:00Z"
continuity_error_count="0" packet_count="21208761" />
2020-10-24 14:20:00.678063 I  TVRec[16]:
FinishedRecording(10411_2020-10-24T11:07:00Z) good recq:<RecordingQuality
overall_score="1" key="10411_2020-10-24T11:07:00Z"
continuity_error_count="0" packet_count="32253338" />

So for example, the recording with "TVRec[4]"  has been recorded on capture
card 4 and this is then HDHomeRun 141013C6.

Recordings with continuity_error_count=0 and with a huge packet_count are
usually OK.

This way you can easily identify which HDHomeRun does not work properly.


About how to fix this, with old HDHomeRun devices it is usually the power
supply that gives problems.
In your case, with two old HDHomeRun devices I would replace the power
supply of both.
Updating the firmware is also a good idea but only after you have replaced
the power supply.

Hope this helps,
Klaas.
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