Tvheadend

I attached the debug log from tvheadend after I added my atsc_us_TN_Nashville frequencies and it does a full initial scan.

I also attached scan output from the hdhomerun linux utility as scan.txt . It just is a more complete map of what is actually available. It also shows that almost all frequencies have a TSID/MUXID of 0x0000. the exceptions are 429,435,645,651-687 but they all scan and add service correctly in tvheadend. I can dump some full dvb muxes dump if you want to take a look.

In the initial scan the first zeroed mux id is frequency 753,000 kHz. It adds the 4 services for 753,000 correctly. These 4 services are then corrupted with each new scan of a zeroed id frequency. It will keep updating the services only for 753,000 kHz like every zero id mux exists on that frequency. I monitor the service tab and see the name of the services change and the last number of the play url is also changes.

I think I can confirm it is some problem with the zeroed mux id. If I stop tvheadend after the 753,000 scan and then go to "dvbmuxes" and change the muxid in the 753,000 frequency file to any non-zero value. I then restart tvheadend and it will scan the next zeroed frequency correctly. This worked for using the 4 frequencies I use for my clearqam tuners. the hdhomerun prime with cable card is going to be using dozens of the frequencies with a zero id so it would be much harder to work around.

Thanks for looking into this. Let me know if there is anything else I can provide or do to help.

Sorry the the server is throwing errors when I attempt to attach files.

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I will try to mirror then and post a link.

here is the initial scan log
http://pastebin.com/QeQJ3qVm

this is the hdhomerun utility scan. It shows all the ts ids.
http://pastebin.com/a0qEssvu

I believe the issue is not related to muxId 0 but in more multiplexes having the same muxId. I have the following problem that explains my statement (I will be brief as I do not want to hijack this issue, let me know if it is related and if you need more information)
I have a DVB-T tuner receiving 6 multiplexes (with muxId 1, 2, 3, 4, 5, 3300) and 2 different multiplexes (with muxId 1, 2) . If I scan the first set I get all channels. If I cleanup and scan the second set it gets all channels. If i scan both of them in any sequence only the first multiplex will give the channels. The transportstreamid in the tvheadend files of the last registered multiplex will get value 65535. If I update that value to a unique value and set initialscan to 1 it will not continue scanning. If you consider the two issues related I will provide more information

thanks. Sorry I shouldn't have tried to diagnose what the problem actually was because that can be annoying to devs. The TSID value was the only connection I saw.

I can compile and test any patches if a possible solution is devised.

thanks again. I am loving tvheadend.

FWIW, this post indicates that this is a common issue on US cable systems.

I don't think it is HDHR related. It shows the same problem on my clear qam tuners.

FYI, I'm am seeing this same issue with ATSC OTA except here the Mux ID is 1 on 7 different muxes. If I make a custom file for DVB Network by location file with only one of these muxes with an id of 1, it scans fine.

Also, I think I'm seeing the same issue with DVB-S on the AMC21 125W satellite. Not sure tho. I'll need to look into that.

Thanks for your time.

Verified this is behaving the same on muxes on AMC21 125W. Appears each mux has an ID of 1. With only one mux it scans fine. So it appears this is happening because of more than one mux with the same ID as another one.

I see that the transportstreamid on any of the muxes after the initial one gets changed to 65535 (0xFFFF)

{
"quality": 100,
"enabled": 1,
"status": "OK",
"transportstreamid": 65535,
"network": "MONTANA PBS",
"frequency": 12106000,
"initialscan": 0,
"symbol_rate": 2398000,
"fec": "2/3",
"polarisation": "Vertical",
"modulation": "PSK_8",
"delivery_system": "SYS_DVBS2",
"rolloff": "ROLLOFF_35",
"satconf": "1"
}

Thanks again.