Linux/pi dvb-c woes. head is in my hands!

There are 2 replies in this Thread which was already clicked 234 times. The last Post () by kanifee.

  • I hope you have a linux guru amongst your midst?


    I'm hoping somebody out there can help me, im pretty close to tearing my own hair out. I recently purchased a sandtek DVB-C/T usb stick that supports windows, linux and a host of other OS and embedded devices.
    My ultimate goal is to have a small TVheadend server and kodi clients in rooms receiving the broadcasts. All very simple... in theory.


    My initial steps upon recieving the stick was to install it on my raspberry pi2 running open elec, i enabled the TVH server and set about configuring it, upon initiating a scan i received a failed tune, this theme continued for a couple of hours, i then ran a successful scan returning 255 channels, 20 + of which are usable as they are not scrambled, great you say? that's what i thought. I set about mapping the scans but on completion all scrambled channels did not map ( hardly surprising, and not realy an issue) and some FTA didn't map either, this is a issue.


    After another hour fiddling i decided to delete the results and re-scan. i entered the figures as i thought i entered them first time around but got no results. i spent another hour or two on this with no luck what so ever. Starting to get miffed i went to my DM800se, installed all the relevant software and ran a scan with the stick, 60 channels found, most of which are scrambled and only about half of the FTA i should see listed.


    Frustrated i installed the stick on my windows machine, the best option for scanning i could find was mediapportal 2, using the brute force option it found all the channels and mapped every single one success! Ok so now i have all the frequencies and sym rates for the channels MP2 has found, should be a piece of cake on any other system right? Well no, it isn't, using the frequencies and sym rate, even the NET ID from the MP" scans TVHeadend still returns no results, this is on a RPI2 with 2 different installs and builds of libreelec and a freshly installed copy of ubuntu 14.x on my laptop.
    I ran a W_scan from the fresh linux install verifying that it see's the stick correctly, has the correct sym rate input and scans a range of 42khz to 100.1khz, it returns a blank scan saying it can find nothing on the network, I let the program use the predefined settings and it returns the same again, nothing detected.


    Just to make sure i reinserted the stick into my windows machine and redid the MP" scan, it scanned every single channel! Oh and MP2 reports excellent signal on all it's scans, all FTA channels are viewable also.


    I have also installed a piece pf software on windows called DVB dream, this is also able to scan all channel both by brute force and by me manually inputting the frequency's so for now im leaning towards some issue between linux and the driver software. Only issue is im pretty ignorant on linux!


    Im at my wits end, can anyone shed any light on this or give me a direction to move in to, MP" just isnt the software to be running a Tv server, it's clunky, runs on windows and is a PITA.



    Im in the UK, newcastle upon tyne trying to access the virgin network, best regards and sorry for the wall of text!

  • If you have the frequencies and symbol rates (and QAM) info, that is a good start. I assume tvheadend is seeing the tuner ok since it at least worked once... So, best to try again and create a new dvb-c/t network (I wouldn't use the network id for now, it may limit the scanning). Then create a new mux with the settings. Trace logs would be useful. Don't have time to explain how now, but there is good info available on tvheadend site.


    BTW: Are you using dvb t or c? My local cable has both, which can make things confusing if things are not set correctly...


    Also, remember that you enter frequencies in Hz and full symbol rate - so lots of zeros on the end...

    Edited once, last by joeuser ().

  • You sir are an absoloute $%#£&$% legend. Three 0's, 6952 vs 6952000 is all it took. After the dreambox software listed the sym rate as 06952 and no one online pointed out the symbol rates in the 7 digit format i took for granted that all scanning software would treat them equally, 4 forums and official suppport couldn't spot the issue and offered less than useful help!
    500+ services scanned :D If you are ever in Newcastle upon tyne England i will bye you a good few drinks. +rep for you sir!

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