[FFmpeg-trac] #10123(avcodec:new): j2k decoder fails on on conformance codestream p0_09.j2k when bitexact is used

FFmpeg trac at avcodec.org
Tue Dec 27 00:08:39 EET 2022


#10123: j2k decoder fails on on conformance codestream p0_09.j2k when bitexact is
used
-------------------------------------+-------------------------------------
             Reporter:  Pierre-      |                     Type:  defect
  Anthony Lemieux                    |
               Status:  new          |                 Priority:  minor
            Component:  avcodec      |                  Version:  git-
                                     |  master
             Keywords:  j2k          |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 The jpeg2000 decoder fails to accurately decode the p0_09.j2k image from
 the ​[https://gitlab.com/wg1/htj2k-codestreams/-/tree/master/ ISO/ITU
 conformance codestream set] when bitexact is set.

 Compare:
 {{{
 ffmpeg -i p0_09.j2k p0_09.png
 }}}
 and
 {{{
 ffmpeg -flags +bitexact -i p0_09.j2k p0_09.exact.png
 }}}
 with the reference image (attached) generated from c1p0_09-0.pgx.
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/10123>
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