[FFmpeg-trac] #10905(avcodec:new): HTJ2K lossless decoding errors

[FFmpeg]

#10905: HTJ2K lossless decoding errors
-------------------------------------+-------------------------------------
             Reporter:  Pierre-      |                     Type:  defect
  Anthony Lemieux                    |
               Status:  new          |                 Priority:  critical
            Component:  avcodec      |                  Version:  git-
             Keywords:  j2k          |  master
  jpeg2000 htj2k                     |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Native J2K decoder is not lossless when decoding lossless J2K files that
 use the Part 15 block coder (HTJ2K).

 How to reproduce:
 {{{
 ojph_compress -i build/in.tiff -o build/out.j2c -reversible true
 ffmpeg  -i build/out.j2c build/out.tiff
 ffmpeg -i build/in.tiff -i build/out.tiff -filter_complex "psnr" -f null -
 }}}

 PSNR is not infinite, in contrast to:

 {{{
 ojph_expand -i build/out.j2c -o build/out.ojph.tiff
 ffmpeg -i build/in.tiff -i build/out.ojph.tiff -filter_complex "psnr" -f
 null -
 }}}

 OpenJPH is available at https://github.com/aous72/OpenJPH.
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/10905>
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