[mythtv-users] recordings randomly fail with: Could not find channel 5_1 in TVCT

[Matt Garman]

It seems that roughly 25% of my recordings fail.  For example, an
episode of "Bones" failed.  Here is what the backend log says:

2011-03-10 20:00:02.444 Started recording: Bones:"The Killer in the
Crosshairs": channel 1321 on cardid 3, sourceid 1
2011-03-10 20:00:03.099 Could not find channel 5_1 in TVCT
2011-03-10 20:00:03.111
VCT Terra: channels(1) tsid(0x3f5) seclength(68)
Channel #0 name(WFLD   ) 32-1 mod(ATSC 8-VSB) cTSID(0x3f5)
 pnum(3) ETM_loc(0) access_ctrl(0) hidden(0) hide_guide(0)
service_type(ATSC TV) source_id(1)
 descriptors length(23) count(1)
  Service Location Descriptor (0xa1) length(21)


2011-03-10 20:00:03.474 Could not find channel 5_1 in TVCT
2011-03-10 20:00:03.483
VCT Terra: channels(1) tsid(0x3f5) seclength(68)
Channel #0 name(WFLD   ) 32-1 mod(ATSC 8-VSB) cTSID(0x3f5)
 pnum(3) ETM_loc(0) access_ctrl(0) hidden(0) hide_guide(0)
service_type(ATSC TV) source_id(1)
 descriptors length(23) count(1)
  Service Location Descriptor (0xa1) length(21)


2011-03-10 20:00:03.849 Could not find channel 5_1 in TVCT
2011-03-10 20:00:03.857
VCT Terra: channels(1) tsid(0x3f5) seclength(68)
Channel #0 name(WFLD   ) 32-1 mod(ATSC 8-VSB) cTSID(0x3f5)
 pnum(3) ETM_loc(0) access_ctrl(0) hidden(0) hide_guide(0)
service_type(ATSC TV) source_id(1)
 descriptors length(23) count(1)
  Service Location Descriptor (0xa1) length(21)

[ ... snip ...]

That message repeats constantly for the duration of the show, several
times per second.  This particular instance resulted in 47,400 lines
being written to /var/log/mythbackend.log.

This problem occurs randomly: it's not specific to a show, time, or
channel.  E.g., other episodes of "Bones" at this time might record
without any problems.

This is on Arch Linux.  mythbackend --version

Please attach all output as a file in bug reports.
MythTV Version   : 0.24
MythTV Branch    : exported
Network Protocol : 63
Library API      : 0.24.20101028-1
QT Version       : 4.7.1
Options compiled in:
 linux release using_alsa using_oss using_backend using_bindings_perl
using_bindings_python using_dvb using_firewire using_frontend
using_hdhomerun using_hdpvr using_iptv using_ivtv using_joystick_menu
using_lirc using_mheg using_opengl_video using_opengl_vsync
using_qtdbus using_qtwebkit using_v4l using_x11 using_xrandr using_xv
using_xvmc using_xvmc_vld using_xvmcw using_bindings_perl
using_bindings_python using_mythtranscode using_opengl using_vdpau
using_ffmpeg_threads using_live using_mheg

Thanks for any help/suggestions,
Matt