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#166 Unknown mpeg MIME type audio/aacp

1.13.3
closed-invalid
nobody
mpg123 (103)
5
2012-05-01
2012-02-03
Andrey Tarasov
No

version -1.13.4
~# mpg123 http://fantasyradioru.no-ip.biz:8000

[mpg123.c:573] error: Unknown mpeg MIME type audio/aacp - is it perhaps a playlist (use -@)?
[mpg123.c:574] error: If you know the stream is mpeg1/2 audio, then please report this as mpg123 bug

how to fix it ? :)

Discussion

  • Thomas Orgis
    Thomas Orgis
    2012-02-03

    Well, this is rather simple and also rather fatal: The stream is not MPEG 1/2 audio, it's encoded in AAC. That is a different codec, and mpg123 as tool to excercise an MPEG 1/2 layer I, II, III decoing engine cannot do much with that.

    If anything, this would be a feature request, but this does not make much sense for mpg123 itself, but only for a theoretical generic audio decoder that mimics the mpg123 behaviour using different decoders in the background. Sorry.

     
  • Thomas Orgis
    Thomas Orgis
    2012-02-03

    • status: open --> open-invalid
     
  • Andrey Tarasov
    Andrey Tarasov
    2012-02-03

    http://en.wikipedia.org/wiki/Advanced_Audio_Coding
    ...AAC has been standardized by ISO and IEC, as part of the MPEG-2 and MPEG-4 specifications...

    in the future can be realized acc in mpg123? :)

     
  • Thomas Orgis
    Thomas Orgis
    2012-02-04

    Yes, it has been standardized to be used as official replacement of what was formerly called MPEG 1.0/2.0/2.5 layer I, II and III audio. And, while based on the old codecs conceptionally, it has its differences and is (especially with all its options for a heckload of sub-streams) overall a different beast.

    There might be a player derived from mpg123 that uses various decoding libs (including an aac decoder) in the future, but we won't twist the libmpg123 decoder to work for AAC, too. That would not be very efficient (and also a lot of work;-). Generally, with a good encoder, MP3 is just fine for web radio that comes in simple stereo. But of course, I don't do the licensing rates for the frikkin patents.

     
  • Thomas Orgis
    Thomas Orgis
    2012-05-01

    If anything, this is a wishlist item that might get fulfilled by a successor to mpg123 that mimics the same interface but adds some other decoding libs to libmpg123.

     
  • Thomas Orgis
    Thomas Orgis
    2012-05-01

    • status: open-invalid --> closed-invalid