[FFmpeg-trac] #6581(avcodec:open): ffmpeg refuses to process Indeo3 resolutions not a multiple of 4.

FFmpeg trac at avcodec.org
Wed Feb 10 10:18:42 EET 2021


#6581: ffmpeg refuses to process Indeo3 resolutions not a multiple of 4.
-------------------------------------+-------------------------------------
             Reporter:  Sgeo         |                    Owner:
                 Type:  defect       |                   Status:  open
             Priority:  important    |                Component:  avcodec
              Version:  git-master   |               Resolution:
             Keywords:  indeo3       |               Blocked By:
  regression                         |
             Blocking:               |  Reproduced by developer:  1
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------

Comment (by giwiniswut):

 Today i stumbled upon this as well. Currently the indeo3 decoder appears
 to reject resolutions that are not multiples of 8 (as opposed to 4 as OP
 experienced).

 I removed that constraint from the indeo3.c file and ffmpeg seemed to
 convert the affected videos with "faulty" resolutions just fine.

 I summarized my findings in this gist on GitHub:
 https://gist.github.com/SebiderSushi/be89ede578881f22c66d667e717c9859

 I will attach these exact same files here as well, i mainly posted them
 inside a GitHub gist to get Markdown formatting.

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Ticket URL: <https://trac.ffmpeg.org/ticket/6581#comment:2>
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