[FFmpeg-trac] #9173(avcodec:new): Underestimated required buffer size (prores 8K)

FFmpeg trac at avcodec.org
Wed Apr 7 23:25:51 EEST 2021


#9173: Underestimated required buffer size (prores 8K)
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             Reporter:  0kajuna0    |                    Owner:
                 Type:  defect      |                   Status:  new
             Priority:  normal      |                Component:  avcodec
              Version:  git-master  |               Resolution:
             Keywords:  prores      |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  0           |
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Comment (by mkver):

 1. I could already reproduce the issue with [https://images.nasa.gov
 /details-First-8K-Video-from-Space.html a different sample]. Nevertheless
 thanks for the effort (have you btw selected FFmpeg as the project? I am
 asking because the sample hasn't appeared [https://samples.ffmpeg.org
 /ffmpeg-bugs/trac/ here] yet).
 2. The problem is basically here: "frame size upper bound: 476932518".
 When converted to bits this gives a negative number in a 32bit, leading to
 nonsense check results.
 3. When I test with an old build of 4.2, the outcome is only slightly
 different: It does not stops after having encountered an error; instead it
 just keeps on going, but the frames where the error have been encountered
 are dropped.

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Ticket URL: <https://trac.ffmpeg.org/ticket/9173#comment:4>
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