[mythtv-commits] Ticket #2797: libavformat failing with multiple audio streams

[MythTV]

#2797: libavformat failing with multiple audio streams
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 Reporter:  anonymous  |        Owner:  ijr    
     Type:  patch      |       Status:  new    
 Priority:  minor      |    Milestone:  unknown
Component:  mythtv     |      Version:  head   
 Severity:  medium     |   Resolution:         
  Mlocked:  0          |  
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Comment(by J.Pilk at tesco.net):

 This problem hasn't bothered me so much recently because I have been using
 the workaround suggested in the Mytharchive wiki: making my DVDs with
 'eng' and 'undef' sound channels both re-encoded from the native dvb mp2
 to ac3.  It may also help that I'm now using tuner cards apparently
 capable of handling the full data streams - Ticket #1907?

 Mytharchive takes more time to do this, both because of the re-encoding
 and because the larger audio files often make it necessary to run requant.
 Both ac3 streams are the same size - despite the usually low info content
 of the subsidiary one - and are substantially larger that the mp2
 originals.

 I have also seen Mytharchive failures when the susidiary channel had a
 problem and the re-encoding failed: stripping off the bad channel with a
 mencoder 'copy' script can allow Mytharchive to work but requires more
 intervention.

 Difficulties with the sound channels usually happen just before the start
 of a programme, I suppose because streams are being dropped or inserted at
 source.  Starting mythtranscode shortly before a BBC Four program change
 is quite a good way to invite problems.

 I'm not sure how much of the above is directly relevant to this ticket,
 but I hope it's helpful.

 Currently running trunk_r15447 from ATrpms on CentOS 5

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Ticket URL: <http://svn.mythtv.org/trac/ticket/2797#comment:14>
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