[FFmpeg-trac] #6107(avfilter:new): showspectrumpic crash on empty audio stream

[FFmpeg]

#6107: showspectrumpic crash on empty audio stream
-------------------------------------+-------------------------------------
             Reporter:               |                     Type:  defect
  Aleksandr_Slobodeniuk              |                 Priority:  normal
               Status:  new          |                  Version:  git-
            Component:  avfilter     |  master
             Keywords:               |               Blocked By:
  showspectrumpic                    |  Reproduced by developer:  0
             Blocking:               |
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 File (broken) atteched.

 all you need to do is
 {{{
 % ffmpeg -i crash_spectrumpic.mov -lavfi showspectrumpic=s=1024x1024
 output_pic.jpg
 }}}

 full output:
 {{{
 % ffmpeg -i result2.mov -lavfi showspectrumpic=s=1024x1024 a.jpg
 ffmpeg version N-83243-g2080bc3 Copyright (c) 2000-2017 the FFmpeg
 developers
   built with gcc 5.4.0 (GCC)
   configuration: --enable-gpl --enable-version3 --enable-cuda --enable-
 cuvid --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-nvenc
 --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r
 --enable-gnutls --enable-iconv --enable-libass --enable-libbluray
 --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme
 --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame
 --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264
 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libsnappy
 --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame
 --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-
 libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-
 libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma
 --enable-decklink --enable-zlib
   libavutil      55. 45.100 / 55. 45.100
   libavcodec     57. 75.100 / 57. 75.100
   libavformat    57. 63.100 / 57. 63.100
   libavdevice    57.  2.100 / 57.  2.100
   libavfilter     6. 70.100 /  6. 70.100
   libswscale      4.  3.101 /  4.  3.101
   libswresample   2.  4.100 /  2.  4.100
   libpostproc    54.  2.100 / 54.  2.100
 [mov,mp4,m4a,3gp,3g2,mj2 @ 0000000000ef79e0] Could not find codec
 parameters for stream 0 (Video: dvvideo (dvpp / 0x70707664), none(bt709,
 bottom coded first (swapped)), 720x576): unspecified pixel format
 Consider increasing the value for the 'analyzeduration' and 'probesize'
 options
 Guessed Channel Layout for Input Stream #0.1 : stereo
 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'result2.mov':
   Metadata:
     major_brand     : RIFF
     minor_version   : 0
     compatible_brands: RIFFqt
     creation_time   : 2017-01-27T11:23:45.000000Z
   Duration: 00:00:00.00, bitrate: N/A
     Stream #0:0(eng): Video: dvvideo (dvpp / 0x70707664), none(bt709,
 bottom coded first (swapped)), 720x576, SAR 59:54 DAR 295:216, 25 tbr, 25
 tbn, 25 tbc (default)
     Metadata:
       creation_time   : 2017-01-27T11:23:45.000000Z
       handler_name    : ?Alias Data Handler
       encoder         : DVCPRO - PAL
     Stream #0:1(eng): Audio: pcm_s16le (lpcm / 0x6D63706C), 48000 Hz,
 stereo, s16, 1536 kb/s (default)
     Metadata:
       creation_time   : 2017-01-27T11:23:45.000000Z
       handler_name    : ?Alias Data Handler
 [mjpeg @ 0000000000df9440] removing common factors from framerate
 Output #0, image2, to 'a.jpg':
   Metadata:
     major_brand     : RIFF
     minor_version   : 0
     compatible_brands: RIFFqt
     encoder         : Lavf57.63.100
     Stream #0:0: Video: mjpeg, yuvj444p(pc), 1258x1152 [SAR 1:1 DAR
 629:576], q=2-31, 200 kb/s, 23.44 fps, 23.44 tbn, 23.44 tbc (default)
     Metadata:
       encoder         : Lavc57.75.100 mjpeg
     Side data:
       cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
 Stream mapping:
   Stream #0:1 (pcm_s16le) -> showspectrumpic
   showspectrumpic -> Stream #0:0 (mjpeg)
 Press [q] to stop, [?] for help
 }}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/6107>
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