Opened 10 years ago

Closed 8 months ago

#9524 closed Bug Report - General (Fixed)

Channel scan QAM sometimes finding wrong possible channels

Reported by: David <dlinvill@…> Owned by: Klaas de Waal
Priority: minor Milestone: 32.0
Component: MythTV - Channel Scanner Version: 0.24-fixes
Severity: medium Keywords:
Cc: Ticket locked: no

Description

I have the previously analog channels 2-77 now broadcast as unencrypted QAM channels.

When I scan for the channels sometimes it correctly finds the 11 subchannels and sometimes it finds "QAM-256 Channel 78 -- Timed out, 77 possible channels" When this happens I get duplicate errors and usually have to delete the card and try setup again.

The cable company is doing something so the old channel numbers are remapped on my QAM tv correctly. For example COMEDY was analog 64 and now is found by hdhomerun as Channel 86 Program 64. On my TV it just appears as (digital) 64 similar to how ATSC remaps.
I feel there is something in the way they are remapping that confuses the scanner. My hdhomerun and TV both always find the correct channels. I also attached an hdhomerun scan filtered to unencrypted channels.

The scan log is from newly install mythbuntu auto-build from 1/27.

Attachments (2)

setup-channelscan.log (119.5 KB) - added by David <dlinvill@…> 10 years ago.
mythtv-setup scan log with -v channelscan of single channel 78 finding 77 possible channels when it should find 11 subchannels
hdhomerun.log (3.4 KB) - added by David <dlinvill@…> 10 years ago.
Output of scan from hdhomerun

Download all attachments as: .zip

Change History (6)

Changed 10 years ago by David <dlinvill@…>

Attachment: setup-channelscan.log added

mythtv-setup scan log with -v channelscan of single channel 78 finding 77 possible channels when it should find 11 subchannels

Changed 10 years ago by David <dlinvill@…>

Attachment: hdhomerun.log added

Output of scan from hdhomerun

comment:1 Changed 9 years ago by stuartm

Milestone: unknown0.25
Type: Bug ReportBug Report - General

comment:2 Changed 9 years ago by danielk

Milestone: 0.25unknown

David, if you could provide 60 seconds of raw capture data from this transport I can probably help with this. It appears that we're getting descriptions of all the channels available on the transport. This is actually pretty cool, but is confusing the scanner.

comment:3 Changed 8 months ago by Klaas de Waal

Milestone: unknown32.0
Owner: changed from danielk to Klaas de Waal
Status: newassigned

The ATSC cable / Clear QAM channel scanning is currently being fixed.

comment:4 Changed 8 months ago by Klaas de Waal

Resolution: Fixed
Status: assignedclosed

ATSC Cable channel scanning is now fixed in master. For the details see ticket #13472 comments 18 to 23.

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