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DVB-S2 scan succeeds, channels save to DB correctly, but playback fails

 
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DVB-S2 scan succeeds, channels save to DB correctly, but playback fails
Nzbaxterman
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Junior Member

New Zealand
Posts: 37
Threads: 5
Joined: Oct 2023
#11
2 hours ago
Confirmed — removed the 11830 block and it scanned clean through to completion, no crash:

2026-08-21 15:41:37:915 [DEBUG] >>> Scanning@stored
2026-08-21 15:41:37:915 [DEBUG] >>> Scanning@about to free loop
2026-08-21 15:41:37:915 [DEBUG] >>> Scanning@about to start next loop (00000000)

So it's SDT-related on that specific transponder, not my config.

Grabbed a mux dump of 11830 (Sky/TP14) via dvbv5-zap externally: https://we.tl/t-domQ1AZons6mZcev

Note: most of this mux is Sky content and will be CA-scrambled — audio/video won't play back, but SDT/PSI tables broadcast in clear regardless of encryption, so that data should be intact in the capture.
Nzbaxterman
Online

Junior Member

New Zealand
Posts: 37
Threads: 5
Joined: Oct 2023
#12
7 minutes ago
Update: this may actually be the same bug as my original report.

With the 11830 block removed, I ran a full channel scan through the normal NextPVR UI (not manual command line) and it completed successfully, and for the first time, playback actually worked.

Previously (with 11830 included), every scan would have hit that malloc crash partway through, killing DeviceHostLinux before it finished which would explain why adapter0-DVB-S-channels.conf was never written, even though channels were still saving correctly to the database along the way.

Wanted to flag this in case it saves you time cross-referencing the two threads. Looks like the crash on 11830 may be the actual root cause of the missing channels.conf, not a separate issue.
Nzbaxterman
Online

Junior Member

New Zealand
Posts: 37
Threads: 5
Joined: Oct 2023
#13
3 minutes ago
Another update: Channel "Three" is missing from the scan. Turns out it's not a bug, Freeview genuinely moved Three off the Kordia transponder as of 29 Jan 2026 (HD upgrade). It's now on 12530 MHz / SR 30000 - which, working through the LNB math, looks like it's the same real transponder as Sky/TP14, the one that's crashing the scanner.

So it seems "Three" is likely sitting on the exact mux we're already investigating. Wanted to flag this since it's independent confirmation that this transponder matters beyond just Sky's own channels - it's carrying mainstream FTA content too (Three, Bravo, Rush, HGTV, Eden all moved there per Freeview's page: https://digitalimports.co.nz/about-us/news-2/).

Let me know if you want anything else from my end - happy to grab a longer capture, try specific PID filtering, or whatever's useful while you dig into the SDT.
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