[mythtv-commits] Ticket #12903: Changing channels while watching live tv results in error - Cannot find A/V Decoder (or a black screen)

[MythTV]

#12903: Changing channels while watching live tv results in error - Cannot find A/V
Decoder (or a black screen)
-------------------------------------------------+-------------------------
     Reporter:  William L. DeRieux IV            |      Owner:  jyavenard
  <WilliamDeRieux@…>                             |
         Type:  Bug Report - General             |     Status:  new
     Priority:  major                            |  Milestone:  0.28.1
    Component:  MythTV - Recording               |    Version:  0.28.0
     Severity:  medium                           |   Keywords:
Ticket locked:  0                                |
-------------------------------------------------+-------------------------
 {{{
 $ mythfrontend --version
 Please attach all output as a file in bug reports.
 MythTV Version : v0.28-72-g228b05b-dirty
 MythTV Branch : fixes/0.28
 Network Protocol : 88
 Library API : 0.28.20160309-1
 QT Version : 5.6.1
 Options compiled in:
  linux debug use_hidesyms using_alsa using_oss using_pulse
 using_pulseoutput using_backend using_bdjava using_bindings_perl
 using_bindings_python using_bindings_php using_crystalhd using_dvb
 using_firewire using_frontend using_hdhomerun using_vbox using_ceton
 using_hdpvr using_ivtv using_joystick_menu using_libcec using_libcrypto
 using_libdns_sd using_libfftw3 using_libxml2 using_lirc using_mheg
 using_opengl using_opengl_video using_opengl_themepainter using_qtwebkit
 using_qtscript using_qtdbus using_sdl using_taglib using_v4l2 using_x11
 using_xrandr using_xv using_debugtype using_mythlogserver
 using_systemd_notify using_bdjava using_bindings_perl
 using_bindings_python using_bindings_php using_fontconfig using_freetype2
 using_mythtranscode using_opengl using_vaapi using_vdpau
 using_ffmpeg_threads using_mheg using_libass using_libxml2
 }}}

 I am also running Debian/Stretch (testing) and this was compiled using
 gcc-6.

 When starting to watch live tv everything works as expected -- however
 when I change to another channel it will either exit back to the main menu
 and display "Could not find A/V decoder" or I will get a black screen.

 There were some 0 length nuv files created in the livetv folder, too
 (seems like the backend may have attempted to restart the recording since
 it failed -- as the next nuv file was non-zero length but had no audio).

 Mythfrontend had also reported that the recordings has 3 or more audio
 channels (and went as high as 38 channels at one point).


 I will be attaching the backend and frontend logs.

 Note the log files reference a failing recording due to 'Tuning timeout'.
 I am using an Analog Capture Card and recording from composite input and
 thus 'Tuning lock/timeout' is not valid in this context please refer to
 this bug for more info: https://code.mythtv.org/trac/ticket/12572).

 Also, I think this issues also happens on scheduled recordings, just not
 as often -- those recording are sometimes lacking audio (the attached log
 files do not reference this part, though).

--
Ticket URL: <https://code.mythtv.org/trac/ticket/12903>
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