#8191: Division by zero at libavcodec/svq1enc.c
-------------------------------------+-------------------------------------
Reporter: Suhwan | Type: defect
Status: new | Priority: normal
Component: | Version: git-
undetermined | master
Keywords: ubsan | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
Summary of the bug:
There is division by zero at libavcodec/svq1enc.c
{{{
libavcodec/svq1enc.c:490:24: runtime error: division by zero
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior
libavcodec/svq1enc.c:490:24 in
}}}
How to reproduce:
{{{
% ./ffmpeg_g -t 2 -stream_loop 4 -y -i vp80-05-sharpness-1439.webp -target
dv50 -loglevel 0 -map 0 -c copy -c:v:211 vp8_v4l2m2m -c:v:0 svq1 -vframes
82 -aframes 98 -r 20 -ab 841k -ar 48000 -ac 9 tmp.g729
ffmpeg version N-94982-gea673a0edb Copyright (c) 2000-2019 the FFmpeg
developers
built with clang version 6.0.0-1ubuntu2 (tags/RELEASE_600/final)
configuration: --cc=clang --cxx=clang++ --ld=clang --enable-debug
--toolchain=clang-asan
}}}
--
Ticket URL: <https://trac.ffmpeg.org/ticket/8191>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker
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