Tvheadend - no ATSC muxes

Quote from kulidan

Does anyone know where the dtv-scan folder is suppose to be located on libreelec? Oddly even on a working system I couldnt find this folder either.

Unfortunately, in the version in the LE repo, it gets compiled into the binary program file so you can't add it after it's been compiled. Also unfortunate is the version that is in the LE repo is missing the ATSC muxes. I believe this is due to it being added from CVH's builds - which are currently missing this muxes list as well.

You can manually add the muxes you need by entering the correct info (frequency and modulation) on the DVBInputs/Muxes tab - but this can be a pita. If you are using ATSC it starts with identifying your available channels. Click on this link RabbitEars.Info and find and click on your TV market. (The site can runs slow sometimes...just let it load.) Then click the print all button so you have an easy list of your available TV channels.

Now the fun part! The important part is the digital channel list. For each major number (in an example like 34.1 the 34 is the major number the .1, .2, .3 etc are minor numbers listing subchannels) you will want to add a new mux in tvheadend. Before you can do that, you need to convert that digital channel number in to a freuqency in Mhz. To help with that, I have built a reference file here:
Dropbox - Link not found
Find your digital channel number and then note the Mhz number next to it. This is what you will need in tvheadend.

In tvheadend on the DVB Inputs/Muxes tab, click add. You'll get a popup where you can select the ATSC network you created. The on the new window that opens, place the Mhz number from the excel file into the Frequency (Hz) field. Select Modulation VSB/8 and then hit Create. Do this for each digital channel that is available in your market. The system should begin scanning for services while you continue to add in the other muxes. Once you are done, you should have a new list of services and you can continue your setup from there.

I'm hoping CVH can resetup his autobuild environment for the tvheadend builds and make sure the ATSC muxes get added back in. At the very least we need to get the one in the LE repo updated to contain the ATSC muxes list. Also hoping he adds a cross compile autobuild for amlogic devices...but I don't want to press my luck!

Quote from chewitt

If things need to change in the TVH packaging to better support ATSC it's best if you suggest the code changes in PR

The issue is solely in the build environment as the tvheadend git that is pulled for the build contains the correct info. Should this be posted to the LE git as an issue?

My ATSC frequencies list was off by one - here is the corrected list for anyone looking to manually enter the frequencies in the tv backend:

Channel  Mhz
2 57028615
3 63028615
4 69028615
5 79028615
6 85028615
7 177028615
8 183028615
9 189028615
10 195028615
11 201028615
12 207028615
13 213028615
14 219028615
15 479028615
16 485028615
17 491028615
18 497028615
19 503028615
20 509028615
21 515028615
22 521028615
23 527028615
24 533028615
25 539028615
26 545028615
27 551028615
28 557028615
29 563028615
30 569028615
31 575028615
32 581028615
33 587028615
34 593028615
35 599028615
36 605028615
37 611028615
38 617028615
39 623028615
40 629028615
41 635028615
42 641028615
43 647028615
44 653028615
45 659028615
46 665028615
47 671028615
48 677028615
49 683028615
50 689028615
51 695028615

I may have discovered the issue to this problem - but am having trouble testing.

At commit f02851ab9c60bdd326fdba9afee4255b7b07a06c on tvheadend, the ATSC network was split to atsc-t and atsc-c. However, the dvb-scan git was never updated to the new naming system. I believe the issue is being caused by the fact that there are no dvb-scan files/folders with the atsc-t and atsc-c networks.

Since the dvb-scan folder is pulled from from the git source when compiling the add-on for LE, I am unable to get my test changes to stick. I can't seem to find a way to get it to pull from another source to test this theory.

Any help would be appreciated. Thanks!

Fix has been submitted to tvheadend...hopefully they'll merge the pull request and new builds will once again contain the ATSC muxes!

Thanks to CVH for the help in testing the fix.

Thankyou edit4ever.

This will be extremely helpful. I speak as someone who has keyed in all the frequencies they needed.

Hopefully tvheadend will fix this ! I reverted back to the stable build because of this issue. Thank you edit4ever and CVH.

It is fixed in latest builds. Turned out to be a member of error issue in the code.