[mythtv-commits] Ticket #2972: Enhance Software encoder to support other codecs and container formats.

[MythTV]

#2972: Enhance Software encoder to support other codecs and container formats.
----------------------+-----------------------------------------------------
 Reporter:  cpinkham  |        Owner:  cpinkham
     Type:  task      |       Status:  new     
 Priority:  minor     |    Milestone:  unknown 
Component:  mythtv    |      Version:  head    
 Severity:  low       |   Resolution:          
----------------------+-----------------------------------------------------

Comment(by cpinkham):

 (In [13510]) Fix the lossy side of mythtranscode to convert over audio
 packets one-for-one
 in the output when encoding.  Previously if a second audio packet came in
 while another was still in the buffer, they both would get encoded in a
 single
 packet in the output.  The Lame decoder appears to handle this fine, but
 libavcodec does not.  The guys on ffmpeg-devel have said we shouldn't have
 2
 MP3 frames in the same audio packet, so this patch fixes mythtranscode so
 it doesn't combine the two.

 This problem manifests itself if you transcode a file to .nuv using
 mythtranscode and later tried to use another libavcodec program to
 transcode
 it again.  libavcodec would ignore the second frame of audio in the packet
 and your audio would play fast or skip depending on the player.

 This will not fix old recordings, the fix for that is in libavcodec which
 I
 will commit separately.  I am waiting on the guys at ffmpeg-devel for a
 little
 guidance in submitting a patch upstream to them, in case they want to
 solve
 the problem differently than I have.  In order to use another libavcodec
 program to transcode one of these 'broken' nuv files, upstream will have
 to
 be fixed.  I am going to fix our copy of libavcodec because I have another
 patch related to #2972 that uses libavcodec for decoding mp3.

 References #2972.

-- 
Ticket URL: <http://svn.mythtv.org/trac/ticket/2972#comment:7>
MythTV <http://svn.mythtv.org/trac>
MythTV