[FFmpeg-trac] #7995(undetermined:new): Division by zero at libavcodec/aacpsy.c:797:29

FFmpeg trac at avcodec.org
Sun Sep 15 15:36:27 EEST 2019


#7995: Division by zero at libavcodec/aacpsy.c:797:29
-------------------------------------+-------------------------------------
             Reporter:  Suhwan       |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
                                     |  undetermined
              Version:  git-master   |               Resolution:
             Keywords:  ubsan asan   |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------

Comment (by Suhwan):

 {{{
 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
 Input #0, flv, from 'tmp.flv':
   Metadata:
     encoder         : Lavf57.66.105
   Duration: 00:00:05.60, start: 0.000000, bitrate: 627 kb/s
     Stream #0:0: Audio: mp3, 48000 Hz, mono, fltp, 64 kb/s
     Stream #0:1: Video: flv1, yuv420p, 560x320, 200 kb/s, 30 fps, 30 tbr,
 1k tbn
 Stream mapping:
   Stream #0:0 -> #0:0 (mp3 (mp3float) -> aac (native))
   Stream #0:1 -> #0:1 (flv1 (flv) -> zmbv (native))
 Press [q] to stop, [?] for help
 [aac @ 0x9b19d40] Bitrate 945 is extremely low, maybe you mean 945k
 [aac @ 0x9b19d40] Using a PCE to encode channel layout "2.1"
 The bitrate parameter is set too low. It takes bits/s as argument, not
 kbits/s
 Output #0, latm, to 'tmp_.loas':
   Metadata:
     encoder         : Lavf58.32.104
     Stream #0:0: Audio: aac (LC), 48000 Hz, 2.1, fltp, 0 kb/s
     Metadata:
       encoder         : Lavc58.56.101 aac
     Stream #0:1: Video: zmbv, bgr0, 560x320, q=2-31, 200 kb/s, 6 fps, 6
 tbn, 6 tbc
     Metadata:
       encoder         : Lavc58.56.101 zmbv
 libavcodec/aacpsy.c:797:29: runtime error: division by zero
 [latm @ 0x9af9500] LATM packet size larger than maximum size 0x1fff=
 1.8kbits/s speed=0.559x
 av_interleaved_write_frame(): Invalid data found when processing input
 [latm @ 0x9af9500] LATM packet size larger than maximum size 0x1fff
 Error writing trailer of tmp_.loas: Invalid data found when processing
 input
 frame=    2 fps=0.0 q=-0.0 Lsize=       0kB time=00:00:00.33 bitrate=
 2.2kbits/s dup=0 drop=1 speed=0.555x
 video:291kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
 muxing overhead: unknown
 [aac @ 0x9b19d40] Qavg: 0.067
 Conversion failed!

 }}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/7995#comment:1>
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