Opened 5 years ago
Closed 3 years ago
#8011 closed defect (fixed)
Division by zero at aacpsy.c:336
Reported by: | Suhwan | Owned by: | |
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Priority: | normal | Component: | undetermined |
Version: | git-master | Keywords: | ubsan |
Cc: | Blocked By: | ||
Blocking: | Reproduced by developer: | no | |
Analyzed by developer: | no |
Description
Summary of the bug:
There's a division by zero at aacpsy.c:336.
How to reproduce:
% ffmpeg_g -y -r 75 -i tmp.wmv -map 0 -c:v:116 adpcm_yamaha -c:v zmbv -disposition:s:6 mp2fixed -disposition:s wmv2 -r 1 -ab 26 -ar 22050 -ac 16 -level 3 tmp_.mov ffmpeg version N-94251-gf83b46e218 Copyright (c) 2000-2019 the FFmpeg developers built with clang version 9.0.0
Attachments (2)
Change History (6)
by , 5 years ago
Attachment: | gdb_log_8011 added |
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by , 5 years ago
comment:1 by , 5 years ago
comment:2 by , 5 years ago
FFmpeg Version: 4.2
Many division by zero bugs are triggered.
ffmpeg version N-94906-gcb8d6a4e3e 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-usan libavutil 56. 35.100 / 56. 35.100 libavcodec 58. 56.101 / 58. 56.101 libavformat 58. 32.104 / 58. 32.104 libavdevice 58. 9.100 / 58. 9.100 libavfilter 7. 58.102 / 7. 58.102 libswscale 5. 6.100 / 5. 6.100 libswresample 3. 6.100 / 3. 6.100 Guessed Channel Layout for Input Stream #0.1 : mono Input #0, asf, from 'tmp.wmv': Metadata: encoder : Lavf57.66.105 Duration: 00:00:05.63, start: 0.000000, bitrate: 647 kb/s Stream #0:0: Video: wmv2 (WMV2 / 0x32564D57), yuv420p, 560x320, SAR 1:1 DAR 7:4, 30 fps, 30 tbr, 1k tbn, 1k tbc Stream #0:1(eng): Audio: wmav2 (a[1][0][0] / 0x0161), 48000 Hz, mono, fltp, 128 kb/s Stream mapping: Stream #0:0 -> #0:0 (wmv2 (native) -> zmbv (native)) Stream #0:1 -> #0:1 (wmav2 (native) -> aac (native)) Press [q] to stop, [?] for help [aac @ 0xad97640] Bitrate 26 is extremely low, maybe you mean 26k [aac @ 0xad97640] Using a PCE to encode channel layout "hexadecagonal" libavcodec/aacpsy.c:336:69: runtime error: division by zero The bitrate parameter is set too low. It takes bits/s as argument, not kbits/s [mov @ 0xad87400] Using MS style video codec tag, the file may be unplayable! Output #0, mov, to 'tmp_.mov': Metadata: encoder : Lavf58.32.104 Stream #0:0: Video: zmbv, bgr0, 560x320 [SAR 1:1 DAR 7:4], q=2-31, 200 kb/s, 1 fps, 16384 tbn, 1 tbc Metadata: encoder : Lavc58.56.101 zmbv Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 22050 Hz, hexadecagonal, fltp, 0 kb/s Metadata: encoder : Lavc58.56.101 aac libavcodec/aacpsy.c:516:60: runtime error: division by zero libavcodec/aacpsy.c:529:12: runtime error: -nan is outside the range of representable values of type 'int' libavcodec/aaccoder.c:554:56: runtime error: division by zeroitrate= 0.3kbits/s speed=1.42x libavcodec/aaccoder.c:556:48: runtime error: division by zero frame= 3 fps=2.2 q=-0.0 size= 256kB time=00:00:02.20 bitrate= 952.8kbits/s dup=0 drop=65 speed=1.63x frame= 4 fps=2.1 q=-0.0 size= 512kB time=00:00:04.70 bitrate= 890.7kbits/s dup=0 drop=139 speed=2.43x [mov @ 0xad87400] not writing 'chan' tag due to lack of channel information frame= 4 fps=2.0 q=-0.0 Lsize= 653kB time=00:00:05.61 bitrate= 951.4kbits/s dup=0 drop=162 speed=2.78x video:645kB audio:6kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.342332% [aac @ 0xad97640] Qavg: 0.000
comment:3 by , 3 years ago
Status: | new → open |
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comment:4 by , 3 years ago
Resolution: | → fixed |
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Status: | open → closed |
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