#10254: Unsupported EXR in the wild
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Reporter: Eugene | Owner: (none)
Type: defect | Status: new
Priority: normal | Component: avcodec
Version: 6.0 | Resolution:
Keywords: exr avcodec | Blocked By:
decoding images |
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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Comment (by vectronic):
I believe this is because the EXR files are creating large VLC tables -
large enough that the index into sub-tables is created than `2^16` which
is the limit defined here:
https://github.com/FFmpeg/FFmpeg/blob/1001bdc5047ec7ed0754a2084b77637028bb82cc/libavcodec/vlc.h#L25
When the table is being constructed, the offset into the sub-table is
stored here and a narrowing conversion occurs, which then causes the
`strange codes` message on the next line:
https://github.com/FFmpeg/FFmpeg/blob/1001bdc5047ec7ed0754a2084b77637028bb82cc/libavcodec/vlc.c#L211-L212
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Ticket URL: <https://trac.ffmpeg.org/ticket/10254#comment:3>
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