Opened 6 years ago

Closed 6 weeks ago

#12014 closed Bug Report - General (Abandoned)

DVB-T transport not working properly

Reported by: amlopezalonso@… Owned by: danielk
Priority: minor Milestone: unknown
Component: MythTV - DVB Version: Master Head
Severity: medium Keywords: DVB-T transport
Cc: Ticket locked: no

Description

Hi,

In recent trunk updates one of the DVB-T transports in my MythTV box has ceased to work properly, showing for both two channels in that transport a behavior such as that of a poor quality signal (little or no motion, black screen, some block artifacts, no audio or just some chirping noise, etc.). All other transports do work ok.

I checked both channels work right using a standalone DVB-T tuner hooked to the same cable/antenna socket, etc.

Attaching FE (playback) and BE logs.

Regards, Antonio

Attachments (2)

backend.log (18.4 KB) - added by amlopezalonso@… 6 years ago.
frontend.log (50.4 KB) - added by amlopezalonso@… 6 years ago.

Download all attachments as: .zip

Change History (4)

Changed 6 years ago by amlopezalonso@…

Attachment: backend.log added

Changed 6 years ago by amlopezalonso@…

Attachment: frontend.log added

comment:1 Changed 6 years ago by dan.garton@…

I am seeing the same issue, using a quad-channel DVB-S/S2 tuner (TBS6985). Using mythtv backend 0.27 from mythbuntu repositories, and either mythtv frontend (from same repos) or xbmc (from team-xbmc repo).

For me, as above, the symptoms are: occasional "signal-loss-type" failures, ie block artifacts in video, and squeaks, pops and dropouts in the audio. While this is occurring, this is what I see in mythbackend.log:

Jan 21 17:43:08 jukes mythbackend: mythbackend[3488]: E DVBRead mpeg/mpegstreamdata.cpp:365 (AssemblePSIP) MPEGStream[3](0x7eff40364368): Error: offset>181, pes length & current cannot be queried
Jan 21 17:44:12  mythbackend: last message repeated 17 times
Jan 21 17:45:20  mythbackend: last message repeated 14 times
Jan 21 17:45:49  mythbackend: last message repeated 6 times

Normally, the problem recovers within a minute or so, and the "signal" recovers. Still, it's really annoying and even a few seconds of that effect is enough to ruin a recording.

I have never seen this problem when watching TV directly using a DVB-compatible player, eg Kaffeine etc.

comment:2 Changed 6 weeks ago by Klaas de Waal

Resolution: Abandoned
Status: newclosed

This is a problem from a long time ago and a lot has changed in MythTV since. Most likely the problem has been solved now and therefore this ticket is now closed. If the problem is still present on MythTV v31 or later then please re-open this ticket or create a new one.

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