[mythtv-commits] Ticket #4515: Frontend unknown error, exiting decoder, livetv stuck on bad channel

[MythTV]

#4515: Frontend unknown error, exiting decoder, livetv stuck on bad channel
------------------------------------+---------------------------------------
 Reporter:  markus.ingalsuo at osp.fi  |        Owner:  ijr    
     Type:  defect                  |       Status:  new    
 Priority:  minor                   |    Milestone:  unknown
Component:  mythtv                  |      Version:  head   
 Severity:  medium                  |   Resolution:         
  Mlocked:  0                       |  
------------------------------------+---------------------------------------

Comment(by dm at prolingua.co.uk):

 I tried out the latest SVN and also noticed that if I tune to a channel
 that is not currently broadcasting it does not display the MHEG "off air"
 banner.  I've done a little bit of investigation and there are several
 problems.  In the backend it seems that data is only written to the output
 file when a keyframe is seen.  However when there is no audio or video
 there is no keyframe so nothing gets written.  Bypassing that test did
 result in data getting written to the file.  On some channels that
 resulted in the frontend seeing the DSMCC stream and beginning to build
 the carousel.  I don't understand why that only occurred on some channels
 and not all.
 The frontend, though, seemed to be stuck generating Prebuffering messages
 and I suspect that was again because there was no video or audio.  I did
 try bypassing the prebuffering here and actually succeeded in getting the
 banner displayed so potentially this can work.

 I hope this is helpful.  I don't really understand the code well enough to
 propose a patch but I'm happy to help with testing.  Although I was
 responsible for adding the dummy video for radio and MHEG I always felt it
 was a hack so I'm pleased to see that radio at least works without it.

 David.

-- 
Ticket URL: <http://svn.mythtv.org/trac/ticket/4515#comment:6>
MythTV <http://svn.mythtv.org/trac>
MythTV