[FFmpeg-trac] #3754(avcodec:open): jpeg2000 encode produces gray garbage files, probably connected to threads and compression

FFmpeg trac at avcodec.org
Wed Jul 9 21:49:04 CEST 2014


#3754: jpeg2000 encode produces gray garbage files, probably connected to threads
and compression
-------------------------------------+-------------------------------------
             Reporter:  bud          |                    Owner:
                 Type:  defect       |                   Status:  open
             Priority:  important    |                Component:  avcodec
              Version:  git-master   |               Resolution:
             Keywords:  libopenjpeg  |               Blocked By:
  regression                         |  Reproduced by developer:  1
             Blocking:               |
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------

Comment (by bud):

 right,

 ffmpeg git + libopenjpeg 1.3+dfsg-4.8

 seems to work. not perfectly though! the first num_threads pictures are
 freakishly small, compressed much more then the following pictures.

 here the ls -1s of './ffmpeg -i in.mov -an -compression_level 100 -threads
 10 folder/%06d.j2c'

  41K 000001.j2c
 145K 000002.j2c
 145K 000003.j2c
 145K 000004.j2c
 145K 000005.j2c
 145K 000006.j2c
 145K 000007.j2c
 145K 000008.j2c
 145K 000009.j2c
 145K 000010.j2c
 1,1M 000011.j2c
 1,1M 000012.j2c
 1,1M 000013.j2c
 1,1M 000014.j2c
 1,1M 000015.j2c
 1,1M 000016.j2c
 1,1M 000017.j2c
 1,1M 000018.j2c
 1,1M 000019.j2c
 1,1M 000020.j2c
 1,1M 000021.j2c
 1,1M 000022.j2c
 1,1M 000023.j2c
 1,1M 000024.j2c
 1,1M 000025.j2c
 1,1M 000026.j2c
 1,1M 000027.j2c
 1,1M 000028.j2c
 1,1M 000029.j2c
 1,2M 000030.j2c
 1,2M 000031.j2c
 ....

 bud

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Ticket URL: <https://trac.ffmpeg.org/ticket/3754#comment:12>
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