[FFmpeg-trac] #9890(avcodec:new): Opus decoding glitches on sample

[FFmpeg]

#9890: Opus decoding glitches on sample
-------------------------------------+-------------------------------------
             Reporter:  Tristan      |                    Owner:  (none)
  Matthews                           |
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:  avcodec
              Version:  git-master   |               Resolution:
             Keywords:  opus         |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------

Old description:

> Summary of the bug:
>
> Using https://people.videolan.org/~tmatth/rev.opus when stream-copied or
> played back.
>
> How to reproduce:
> {{{
> % ./ffplay rev.opus
> ./ffplay rev.opus
> ffplay version N-107861-gf5a663f2a9 Copyright (c) 2003-2022 the FFmpeg
> developers
>   built with gcc 11 (Ubuntu 11.2.0-19ubuntu1)
>   configuration: --disable-debug --disable-doc --disable-shared --enable-
> gpl --enable-libmp3lame --enable-libopus --enable-libvpx --enable-libx264
> --enable-nonfree --enable-gnutls --enable-libfdk_aac --enable-postproc
> --enable-small --enable-version3 --enable-libx265 --enable-libsrt
> --prefix=/home/tmatth/local
>   libavutil      57. 33.101 / 57. 33.101
>   libavcodec     59. 42.102 / 59. 42.102
>   libavformat    59. 30.100 / 59. 30.100
>   libavdevice    59.  8.101 / 59.  8.101
>   libavfilter     8. 46.103 /  8. 46.103
>   libswscale      6.  8.103 /  6.  8.103
>   libswresample   4.  8.100 /  4.  8.100
>   libpostproc    56.  7.100 / 56.  7.100
> Input #0, ogg, from 'rev.opus':    0KB vq=    0KB sq=    0B f=0/0
>   Duration: 00:00:06.00, start: 0.000000, bitrate: 64 kb/s
>   Stream #0:0(eng): Audio: opus, 48000 Hz, stereo, fltp
>     Metadata:
>       handler_name    : SoundHandler
>       vendor_id       : [0][0][0][0]
>       major_brand     : isom
>       minor_version   : 512
>       compatible_brands: isomiso2avc1mp41
>       encoder         : Lavf58.76.100
> }}}
>

> Note that:
> {{{
> ./ffplay -acodec libopus rev.opus
> }}}
> doesn't glitch but also that this happens with streamcopying via ffmpeg
> as well (so not specific to ffplay).
>
> The file plays fine with VLC, totem, and opsudec also decodes it to wav
> without any glitches.

New description:



--
Comment (by Tristan Matthews):

 I've submitted a patch here:
 http://ffmpeg.org/pipermail/ffmpeg-devel/2022-August/300758.html


 I've created a better sample with LBRR packets that could be incorporated
 into FATE.
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/9890#comment:3>
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