[FFmpeg-trac] #7032(avcodec:new): defect: mpc8: audible blip at end of some tracks

FFmpeg trac at avcodec.org
Tue Feb 20 20:51:38 EET 2018

#7032: defect: mpc8: audible blip at end of some tracks
             Reporter:  smithjd15  |                     Type:  defect
               Status:  new        |                 Priority:  normal
            Component:  avcodec    |                  Version:  3.3.6
             Keywords:             |               Blocked By:
             Blocking:             |  Reproduced by developer:  0
Analyzed by developer:  0          |
 Summary of the bug:

 Decoding mpc8 files with ffmpeg introduces an audible blip at the end of
 some files that is not present when decoded with the mpcdec decoder.

 How to reproduce:

 ffmpeg -i <some-sv8-file>.mpc -format wav  <some-sv8-file>.wav

 Open the resulting file in a media player or look at the end of the track
 in an audio editing application to see the visible blip.

 Using the samples from https://trac.ffmpeg.org/ticket/6046 (qx.mpc) of a
 waveform the blip is clearly visible and somewhat audible after converting
 the samples to .wav files.

 ffmpeg version 3.3.4 Copyright (c) 2000-2017 the FFmpeg developers
 built with gcc 4.8 (SUSE Linux)

Ticket URL: <https://trac.ffmpeg.org/ticket/7032>
FFmpeg <https://ffmpeg.org>
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