[libav-bugs] [Bug 571] Can't transcode mpc audio file

bugzilla at libav.org bugzilla at libav.org
Wed May 10 02:11:09 CEST 2017


https://bugzilla.libav.org/show_bug.cgi?id=571

--- Comment #3 from Sean McGovern <gseanmcg at gmail.com> ---
With some manually-inserted bitstream_tell() logging:

$ ./avconv -i ~/Downloads/AUD-5C.mpc -f null -
avconv version v13_dev0-1118-gcb167f2, Copyright (c) 2000-2017 the Libav
developers
  built on May  9 2017 19:11:03 with Apple LLVM version 8.0.0
(clang-800.0.42.1)
Input #0, mpc, from '/Users/seanmcg/Downloads/AUD-5C.mpc':
  Duration: 00:00:45.00, start: 0.000000, bitrate: 94 kb/s
    Stream #0:0: Audio: musepack7
      48000 Hz, stereo, s16p
Stream mapping:
  Stream #0:0 -> #0:0 (musepack7 (mpc7) -> pcm_s16le (native))
Press ctrl-c to stop encoding
[mpc7 @ 0x7fb8bac15540] bitstream_tell() after reading subband indexes: 133
[mpc7 @ 0x7fb8bac15540] bitstream_tell() after getting scale index coding
method: 184
[mpc7 @ 0x7fb8bac15540] bitstream_tell() after getting scale indexes: 778
[mpc7 @ 0x7fb8bac15540] bitstream_tell() after getting quantizers: 8483
Output #0, null, to 'pipe:':
  Metadata:
    encoder         : Lavf58.0.0
    Stream #0:0: Audio: pcm_s16le
      48000 Hz, stereo, s16, 1536 kb/s
    Metadata:
      encoder         : Lavc58.3.1 pcm_s16le
[mpc7 @ 0x7fb8bac15540] bitstream_tell() after reading subband indexes: 124
[mpc7 @ 0x7fb8bac15540] bitstream_tell() after getting scale index coding
method: 187
[mpc7 @ 0x7fb8bac15540] bitstream_tell() after getting scale indexes: 364
[mpc7 @ 0x7fb8bac15540] bitstream_tell() after getting quantizers: 3008
[mpc7 @ 0x7fb8bac15540] Error decoding frame: used 3008 of 1856 bits
Error while decoding stream #0:0

<.. snipped for brevity ..>

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