[mythtv-commits] Ticket #13292: LiveTV Channel Switching - DVB-T/T2 UK Freeview

[MythTV]

#13292: LiveTV Channel Switching - DVB-T/T2 UK Freeview
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 Reporter:  Mike Bibbings         |          Owner:  (none)
     Type:  Bug Report - General  |         Status:  new
 Priority:  minor                 |      Milestone:  needs_triage
Component:  MythTV - DVB          |        Version:  Master Head
 Severity:  medium                |     Resolution:
 Keywords:                        |  Ticket locked:  0
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Comment (by Mike Bibbings):

 Done some more investigations, the issue seems to be (mainly) with audio
 stream detection.

 I applied a patch which disabled FAIL return in avformatdecoder.cpp
 (attached disable_avformatdecoder_return_FAIL_DEBUGONLY.patch)

 The attached log mythfrontend.20180615130657.23054-various-channel-switch-
 withdebug-patch.log
  shows a number of entries like:
 2018-06-15 14:07:44.328931 D [23054/23054] CoreContext
 avformatdecoder.cpp:205 (has_codec_parameters) - AFD: unspecified frame
 size

 With the patch applied channel tuning is far faster, as audio seems to
 sort itself out, and detection now works in RingBuffer (it no longer drops
 back to in-file).

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Ticket URL: <https://code.mythtv.org/trac/ticket/13292#comment:8>
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