wavpack: CRC error 2

[ami_stuff]

​http://samples.mplayerhq.hu/A-codecs/wavpcm/madbear.wav

$ ffmpeg -i madbear.wav -ac 3 out.wv
ffmpeg version 2.3.git Copyright (c) 2000-2014 the FFmpeg developers
  built on Aug 21 2014 13:25:12 with gcc 4.6.2 (GCC)
  configuration: --disable-pthreads --disable-yasm --enable-gpl --disable-ffprob
e
  libavutil      54.  5.100 / 54.  5.100
  libavcodec     56.  0.101 / 56.  0.101
  libavformat    56.  1.100 / 56.  1.100
  libavdevice    56.  0.100 / 56.  0.100
  libavfilter     5.  0.100 /  5.  0.100
  libswscale      3.  0.100 /  3.  0.100
  libswresample   1.  1.100 /  1.  1.100
  libpostproc    53.  0.100 / 53.  0.100
[pcm_s16le @ 01dc4f40] Warning: not compiled with thread support, using thread e
mulation
Guessed Channel Layout for  Input Stream #0.0 : stereo
Input #0, wav, from 'madbear.wav':
  Metadata:
    encoder         : File created by GoldWave.  GoldWave copyright (C) Chris Cr
aig
  Duration: 00:00:06.48, bitrate: 352 kb/s
    Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 11025 Hz, 2 channels,
 s16, 352 kb/s
[wavpack @ 01cdf140] Warning: not compiled with thread support, using thread emu
lation
[pcm_s16le @ 01de1ba0] Warning: not compiled with thread support, using thread e
mulation
Output #0, wv, to 'out.wv':
  Metadata:
    encoder         : Lavf56.1.100
    Stream #0:0: Audio: wavpack, 11025 Hz, 2.1, s16p, 128 kb/s
    Metadata:
      encoder         : Lavc56.0.101 wavpack
Stream mapping:
  Stream #0:0 -> #0:0 (pcm_s16le (native) -> wavpack (native))
Press [q] to stop, [?] for help
size=     226kB time=00:00:08.00 bitrate= 231.5kbits/s
video:0kB audio:226kB subtitle:0kB other streams:0kB global headers:0kB muxing o
verhead: 0.039759%

$ ffmpeg -err_detect +crccheck -i out.wv -f null -
ffmpeg version 2.3.git Copyright (c) 2000-2014 the FFmpeg developers
  built on Aug 21 2014 13:25:12 with gcc 4.6.2 (GCC)
  configuration: --disable-pthreads --disable-yasm --enable-gpl --disable-ffprob
e
  libavutil      54.  5.100 / 54.  5.100
  libavcodec     56.  0.101 / 56.  0.101
  libavformat    56.  1.100 / 56.  1.100
  libavdevice    56.  0.100 / 56.  0.100
  libavfilter     5.  0.100 /  5.  0.100
  libswscale      3.  0.100 /  3.  0.100
  libswresample   1.  1.100 /  1.  1.100
  libpostproc    53.  0.100 / 53.  0.100
[wavpack @ 01dc5180] Warning: not compiled with thread support, using thread emu
lation
[wavpack @ 01dc5180] Too few bits (-1) left
[wavpack @ 01dc5180] CRC error
Input #0, wv, from 'out.wv':
  Metadata:
    encoder         : Lavf56.1.100
  Duration: 00:00:06.48, start: 0.000000, bitrate: 285 kb/s
    Stream #0:0: Audio: wavpack, 11025 Hz, 2.1, s16p
[pcm_s16le @ 01df6780] Warning: not compiled with thread support, using thread e
mulation
[wavpack @ 01deb020] Warning: not compiled with thread support, using thread emu
lation
Output #0, null, to 'pipe:':
  Metadata:
    encoder         : Lavf56.1.100
    Stream #0:0: Audio: pcm_s16le, 11025 Hz, 2.1, s16, 529 kb/s
    Metadata:
      encoder         : Lavc56.0.101 pcm_s16le
Stream mapping:
  Stream #0:0 -> #0:0 (wavpack (native) -> pcm_s16le (native))
Press [q] to stop, [?] for help
[wavpack @ 01deb020] Too few bits (-1) left
[wavpack @ 01deb020] CRC error
[wavpack @ 01deb020] Too few bits (-1) left
[wavpack @ 01deb020] CRC error
[wavpack @ 01deb020] Too few bits (0) left
[wavpack @ 01deb020] CRC error
[wavpack @ 01deb020] Too few bits (-1) left
[wavpack @ 01deb020] CRC error
size=N/A time=00:00:06.47 bitrate=N/A
video:0kB audio:419kB subtitle:0kB other streams:0kB global headers:0kB muxing o
verhead: unknown

[ami_stuff]

It's unrelated, but also output from this:

$ ffmpeg -i madbear.wav -ac 1 -ar 300000 out.wv

doesn't decode correctly

[Christophe]

Probably #2881 fix wasn't sufficient. That seems to be because the stream is truncated (again), seeing the message.

[Christophe]

Replying to ami_stuff:

It's unrelated, but also output from this:

$ ffmpeg -i madbear.wav -ac 1 -ar 300000 out.wv

doesn't decode correctly

I've fixed that (decoder complaining about block size I think) but could you still fill a bug report?

Your -ac 3 (root cause of the issue, other values seem fine) issue looks harder and is actually not related to encoder not allocating enough...

[ami_stuff]

Replying to kurosu:

I've fixed that (decoder complaining about block size I think) but could you still fill a bug report?

thanks and done - ticket #3881.

[Christophe]

This is an error occurring it seems because the info to determine the trailing bits is not reset when encoding successively blocks.

[Elon Musk]

Fixed in 4adad5a19ac85de69ced6b1d154344609ff4e493