EIT data incomplete on one transponder Now Solved!
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EIT data incomplete on one transponder Now Solved!
After some recent changes to my local terrestrial transmitter's line-up a rescan of all channels was required.
I have the normal eight days of data for each transponder except one. All data for that transponder is missing.
Here is the transponder information from:- https://linuxtv.org/downloads/dtv-scan-tables [date] 2022-11-27.
This is the relevant section for my locality (Poole/Bournemouth from the IOW Rowridge transmitter):-
[dvb-t/uk-Rowridge]
T 482167000 8MHz 3/4 NONE QAM64 8k 1/32 NONE
T 498000000 8MHz 2/3 NONE QAM64 8k 1/32 NONE
T 506000000 8MHz 3/4 NONE QAM64 8k 1/32 NONE
T 522000000 8MHz 2/3 NONE QAM64 8k 1/32 NONE
T 530000000 8MHz 3/4 NONE QAM64 8k 1/32 NONE
T 602000000 8MHz 3/4 NONE QPSK 8k 1/32 NONE
T2 474167000 8MHz 2/3 NONE QAM256 32k 1/128 NONE 0
T2 746000000 8MHz 2/3 NONE QAM256 32k 1/128 NONE 0
It looks like it is only the very first transponder on 482167000Hz that has no EIT information. All the others have 8 days.
Why would just one have no information?
Puzzled Tony.
EDIT: I have just tried VLC with an .xpf file and it works for VLC, there is EIT data showing see screenshot in my cloud storage:-
https://mega.nz/file/Yg41gYoK#x1SR9T5I- ... jcWJZRARNw
I have the normal eight days of data for each transponder except one. All data for that transponder is missing.
Here is the transponder information from:- https://linuxtv.org/downloads/dtv-scan-tables [date] 2022-11-27.
This is the relevant section for my locality (Poole/Bournemouth from the IOW Rowridge transmitter):-
[dvb-t/uk-Rowridge]
T 482167000 8MHz 3/4 NONE QAM64 8k 1/32 NONE
T 498000000 8MHz 2/3 NONE QAM64 8k 1/32 NONE
T 506000000 8MHz 3/4 NONE QAM64 8k 1/32 NONE
T 522000000 8MHz 2/3 NONE QAM64 8k 1/32 NONE
T 530000000 8MHz 3/4 NONE QAM64 8k 1/32 NONE
T 602000000 8MHz 3/4 NONE QPSK 8k 1/32 NONE
T2 474167000 8MHz 2/3 NONE QAM256 32k 1/128 NONE 0
T2 746000000 8MHz 2/3 NONE QAM256 32k 1/128 NONE 0
It looks like it is only the very first transponder on 482167000Hz that has no EIT information. All the others have 8 days.
Why would just one have no information?
Puzzled Tony.
EDIT: I have just tried VLC with an .xpf file and it works for VLC, there is EIT data showing see screenshot in my cloud storage:-
https://mega.nz/file/Yg41gYoK#x1SR9T5I- ... jcWJZRARNw
Last edited by vidtek on Mon May 08, 2023 3:40 pm, edited 1 time in total.
Myth.32 Krnl. 5.15.0-73 QT5.15.2 ubntu 22.04.1 Intel i7-7700K GTX 1660 Nvdia Hauppge Quad tunerT2 HomerundualT1
Re: EIT data incomplete on one transponder
I can have a look at how your database is configured.
Can you please post somewhere a dump of the database tables capturecard, videosource, dtv_multiplex and channel.
You can create a txt file for each table by giving the following commands:where you have to put your own username and password if it is not mythtv.
Can you please post somewhere a dump of the database tables capturecard, videosource, dtv_multiplex and channel.
You can create a txt file for each table by giving the following commands:
Code: Select all
$ mysql -u mythtv -pmythtv mythconverg -e "select * from capturecard;" > capturecard.txt
$ mysql -u mythtv -pmythtv mythconverg -e "select * from videosource;" > videosource.txt
$ mysql -u mythtv -pmythtv mythconverg -e "select * from dtv_multiplex;" > dtv_multiplex.txt
$ mysql -u mythtv -pmythtv mythconverg -e "select * from channel;" > channel.txt
Re: EIT data incomplete on one transponder
@kmdewaal, Thank you for your response.
Unfortunately those commands do not generate any text files.
I entered each one then did a locate for the files - nothing. I looked in every possible location, but there were no files generated anywhere in my system.
Edit I did a phpmyadmin dump of those tables in .odt format.
Unfortunately this forum has reached the limit of attachments, so I uploaded them to my mega account here: https://mega.nz/folder/Z9JADara#Vcb1648d_d0ESjmilnVssQ
Unfortunately those commands do not generate any text files.
I entered each one then did a locate for the files - nothing. I looked in every possible location, but there were no files generated anywhere in my system.
Edit I did a phpmyadmin dump of those tables in .odt format.
Unfortunately this forum has reached the limit of attachments, so I uploaded them to my mega account here: https://mega.nz/folder/Z9JADara#Vcb1648d_d0ESjmilnVssQ
Myth.32 Krnl. 5.15.0-73 QT5.15.2 ubntu 22.04.1 Intel i7-7700K GTX 1660 Nvdia Hauppge Quad tunerT2 HomerundualT1
Re: EIT data incomplete on one transponder
I have just had a thought and tried the programme guide on mythweb and all data is there.
The forum has still got issues with attachments so here is my cloud storage showing the missing entry for (as an example) channel 41the channel designated Legend.
https://mega.nz/folder/Z9JADara#Vcb1648d_d0ESjmilnVssQ
Why would mythweb correctly display all the information missing from the normal frontend EPG display?
Tony.
The forum has still got issues with attachments so here is my cloud storage showing the missing entry for (as an example) channel 41the channel designated Legend.
https://mega.nz/folder/Z9JADara#Vcb1648d_d0ESjmilnVssQ
Why would mythweb correctly display all the information missing from the normal frontend EPG display?
Tony.
Myth.32 Krnl. 5.15.0-73 QT5.15.2 ubntu 22.04.1 Intel i7-7700K GTX 1660 Nvdia Hauppge Quad tunerT2 HomerundualT1
Re: EIT data incomplete on one transponder
Hi Tony, thanks for the info. Plain ASCII would be better but I can decode this. The screendumps are good.
Your configuration.
There are two video source configured, number 1 named Hidef and number 2 named Stddef.
Video source 1 has all 6 multiplexes and video source 2 has 5 multiplexes; the 474MHz is missing.
Tuner cards 1 to 4 (quad1 to quad4) are connected to video source 1; only card 4 is configured to scan for EIT.
Tuner cards 5 and 6 (star1 and star2) are connected to video source 2; but there is NO card configured to scan for EIT.
Why guide information is missing in the mythfrontend guide.
As there is overlap between video source 1 and 2, a channel can be present on video source 1 WITH guide data and the same channel can be present on video source 2 WITHOUT guide data.
The guide of mythfrontend shows each channel only once and it is largely random which one it picks if there are duplicate channels. If it picks the channel from the video source for which there is no EIT configured then there is no guide data shown for that channel. Mythweb does it probably different.
The way forward
If both your tuner cards are capable of receiving both DVB-T and DVB-T2 then I suggest to use only one video source and connect all capture cards to that video source. You then need only one capture card to be configured for EIT and the system will sort everything out by itself.
If only one tuner is capable of DVB-T/T2 and the other one can do only DVB-T then you need two separate video sources, one for each tuner.
For each video source you have to do a channel scan and you have to configure one capture card to do EIT scanning.
There is then overlap because the DVB-T multiplexes can be received by both tuners but as both will have guide data this does not matter.
There is the possibility to add priority to tuners and/or channels but that is almost never needed, usually the scheduler can sort everything out by itselff.
This should do it!
Your configuration.
There are two video source configured, number 1 named Hidef and number 2 named Stddef.
Video source 1 has all 6 multiplexes and video source 2 has 5 multiplexes; the 474MHz is missing.
Tuner cards 1 to 4 (quad1 to quad4) are connected to video source 1; only card 4 is configured to scan for EIT.
Tuner cards 5 and 6 (star1 and star2) are connected to video source 2; but there is NO card configured to scan for EIT.
Why guide information is missing in the mythfrontend guide.
As there is overlap between video source 1 and 2, a channel can be present on video source 1 WITH guide data and the same channel can be present on video source 2 WITHOUT guide data.
The guide of mythfrontend shows each channel only once and it is largely random which one it picks if there are duplicate channels. If it picks the channel from the video source for which there is no EIT configured then there is no guide data shown for that channel. Mythweb does it probably different.
The way forward
If both your tuner cards are capable of receiving both DVB-T and DVB-T2 then I suggest to use only one video source and connect all capture cards to that video source. You then need only one capture card to be configured for EIT and the system will sort everything out by itself.
If only one tuner is capable of DVB-T/T2 and the other one can do only DVB-T then you need two separate video sources, one for each tuner.
For each video source you have to do a channel scan and you have to configure one capture card to do EIT scanning.
There is then overlap because the DVB-T multiplexes can be received by both tuners but as both will have guide data this does not matter.
There is the possibility to add priority to tuners and/or channels but that is almost never needed, usually the scheduler can sort everything out by itselff.
This should do it!
Re: EIT data incomplete on one transponder
@kmdewaal
Many thanks for your efforts and explanation, it makes sense now.
I do have one quad tuner T2 capable and a Homerun dual tuner only T1 capable as I bought it in Western Australia before we moved back to the UK.
So to be clear, I do a full scan on each source, then only have one tuner doing an EIT fill, not both the T2 and T1.
Will report the result. Once again thanks for your time and effort.
Many thanks for your efforts and explanation, it makes sense now.
I do have one quad tuner T2 capable and a Homerun dual tuner only T1 capable as I bought it in Western Australia before we moved back to the UK.
So to be clear, I do a full scan on each source, then only have one tuner doing an EIT fill, not both the T2 and T1.
Will report the result. Once again thanks for your time and effort.
Myth.32 Krnl. 5.15.0-73 QT5.15.2 ubntu 22.04.1 Intel i7-7700K GTX 1660 Nvdia Hauppge Quad tunerT2 HomerundualT1
Re: EIT data incomplete on one transponder
Almost... Each video source needs its own guide data, so each video source needs to have one tuner doing EIT scanning. So one of the quad AND one of the dual needs to be configured for EIT scanning (given that the quad is for one video source and the dual is for the other video source).
About transponder frequencies, website https://www.ofcom.org.uk/spectrum/infor ... -frequency is what I think the most comprehensive list of all transmitters and frequencies in the UK.
About transponder frequencies, website https://www.ofcom.org.uk/spectrum/infor ... -frequency is what I think the most comprehensive list of all transmitters and frequencies in the UK.
Re: EIT data incomplete on one transponder
One last point: EIT scanning on HDHomeRun devices has to be configured on the first tuner. See https://www.mythtv.org/wiki/Channel_Sca ... nformation
Re: EIT data incomplete on one transponder
@kmdewaal -
Success! That did the trick. I have posted a screenshot of the legend channel correctly populated.
It's strange how convoluted and complicated these things can be. Well done for unravelling the issue, hat's off to you buddy.
https://mega.nz/folder/Z9JADara#Vcb1648d_d0ESjmilnVssQ
I feel a bit of a numpty as I am an electronics engineer, started life as a TV engineer in the 1960's even before colour tv arrived. I also went back to college in 1998 at the age of 48 and did a 3 years full-time computer networking and systems administration study graduated in 2001 and I still needed your assistance to sort this little issue.
Even with all my tv and transmission knowledge, I am struggling to make sense of the digital transmission complexities in the link you gave me for ofcom. Maybe my tired old brain is just not up to it any more......
Success! That did the trick. I have posted a screenshot of the legend channel correctly populated.
It's strange how convoluted and complicated these things can be. Well done for unravelling the issue, hat's off to you buddy.
https://mega.nz/folder/Z9JADara#Vcb1648d_d0ESjmilnVssQ
I feel a bit of a numpty as I am an electronics engineer, started life as a TV engineer in the 1960's even before colour tv arrived. I also went back to college in 1998 at the age of 48 and did a 3 years full-time computer networking and systems administration study graduated in 2001 and I still needed your assistance to sort this little issue.
Even with all my tv and transmission knowledge, I am struggling to make sense of the digital transmission complexities in the link you gave me for ofcom. Maybe my tired old brain is just not up to it any more......
Myth.32 Krnl. 5.15.0-73 QT5.15.2 ubntu 22.04.1 Intel i7-7700K GTX 1660 Nvdia Hauppge Quad tunerT2 HomerundualT1
Re: EIT data incomplete on one transponder Now Solved!
It is great that you got it all working now!
According to the immortal Douglas Adams in The Hitchhikers Guide to the Galaxy, as soon as you understand how the world works it is immediately replaced by another world that is ten times as complicated. I think that is what happened to you
About channel scanning, it took me considerable time to figure out how it all worked, then to figure out how it should work, then to fix it and then I captured the knowledge in the https://www.mythtv.org/wiki/Channel_Scanning WIki pages which I also need to refer to myself at times....
According to the immortal Douglas Adams in The Hitchhikers Guide to the Galaxy, as soon as you understand how the world works it is immediately replaced by another world that is ten times as complicated. I think that is what happened to you

About channel scanning, it took me considerable time to figure out how it all worked, then to figure out how it should work, then to fix it and then I captured the knowledge in the https://www.mythtv.org/wiki/Channel_Scanning WIki pages which I also need to refer to myself at times....
Re: EIT data incomplete on one transponder Now Solved!
Thanks again, and the little snippet on the homeruns requiring the eit scanning to be on the first tuner is a bit of a gotcha, well done for spotting that.
As you say this is getting sooo complicated, just installing Mythtv and getting it to run is a challenge even though I've done it multilple times I still struggle.
Every new iteration and kubuntu release I now document and stick it on the Ubuntu forums, that way when I stuff up again I have something to refer to; hopefully it helps others too.
As you say this is getting sooo complicated, just installing Mythtv and getting it to run is a challenge even though I've done it multilple times I still struggle.
Every new iteration and kubuntu release I now document and stick it on the Ubuntu forums, that way when I stuff up again I have something to refer to; hopefully it helps others too.
Myth.32 Krnl. 5.15.0-73 QT5.15.2 ubntu 22.04.1 Intel i7-7700K GTX 1660 Nvdia Hauppge Quad tunerT2 HomerundualT1