[FFmpeg-trac] #1258(avcodec:open): Codec support request : MPEG Multichannel Audio

[FFmpeg]

#1258: Codec support request : MPEG Multichannel Audio
-------------------------------------+-------------------------------------
             Reporter:  Aaron        |                    Owner:  (none)
  Scheiner                           |
                 Type:  enhancement  |                   Status:  open
             Priority:  wish         |                Component:  avcodec
              Version:  git-master   |               Resolution:
             Keywords:  mp2          |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by Andrew-R):

 ah, interesting, 384Kbit/s figure is just form MPEG1 compatible bitstream.

 =======
 2.11 Extension Bit Stream
 2.11.1 Introduction
 The MPEG-2 audio standard      contains a provision which allows the use
 of an extension bit stream.The extension bit stream provides a way to
 increase the bit rate above the maximum rate defined in MPEG-1 (384
 Kbits/s). If the extension bit stream is used, two audio bit streams  are
 parsed out by the system decoder: the MPEG-1 compatible stream and the
 extension bit stream. Frames from the two streams are paired together
 increasing the number of bits to code the sample in each combined frame.
 =====

 src:
 http://dspace.mit.edu/bitstream/handle/1721.1/11468/33352495-MIT.pdf?sequence=2

 but I guess this is not important for HDV use case?
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/1258#comment:12>
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