[FFmpeg-trac] #1692(avfilter:new): Using atempo filter causes segfault

[FFmpeg]

#1692: Using atempo filter causes segfault
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             Reporter:  takis       |                    Owner:
                 Type:  defect      |                   Status:  new
             Priority:  normal      |                Component:  avfilter
              Version:  git-master  |               Resolution:
             Keywords:              |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  0           |
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Comment (by takis):

 I wanted to git-bisect it, but is seems it has been happing from the first
 revision of libavfilter/af_atempo.c.

 {{{
 pissaris at takis-Latitude-E6520:/usr/local/src/ff/ffmpeg.org/build-static$
 ./ffmpeg_g -t 10 -i /opt/android-sdk-
 linux_x86/samples/android-14/ApiDemos/res/raw/test_cbr.mp3 -af atempo=0.8
 asdf.wav
 ffmpeg version N-41650-ga1aac8d Copyright (c) 2000-2012 the FFmpeg
 developers
   built on Aug 28 2012 13:37:26 with gcc 4.6.3
   configuration: --enable-avfilter --enable-frei0r --enable-gpl --enable-
 libfaac --enable-libmp3lame --enable-libschroedinger --enable-libspeex
 --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264
 --enable-libxvid --enable-nonfree --enable-pic --enable-pthreads
 --disable-shared --enable-static --enable-version3 --enable-x11grab
 --disable-optimizations
   libavutil      51. 58.100 / 51. 58.100
   libavcodec     54. 25.100 / 54. 25.100
   libavformat    54.  6.101 / 54.  6.101
   libavdevice    54.  0.100 / 54.  0.100
   libavfilter     2. 81.100 /  2. 81.100
   libswscale      2.  1.100 /  2.  1.100
   libswresample   0. 15.100 /  0. 15.100
   libpostproc    52.  0.100 / 52.  0.100
 [mp3 @ 0x185a120] max_analyze_duration 5000000 reached at 5015510
 [mp3 @ 0x185a120] Estimating duration from bitrate, this may be inaccurate
 Input #0, mp3, from '/opt/android-sdk-
 linux_x86/samples/android-14/ApiDemos/res/raw/test_cbr.mp3':
   Duration: 00:00:52.86, start: 0.000000, bitrate: 55 kb/s
     Stream #0:0: Audio: mp3, 44100 Hz, mono, s16, 56 kb/s
 File 'asdf.wav' already exists. Overwrite ? [y/N] y
 Output #0, wav, to 'asdf.wav':
   Metadata:
     encoder         : Lavf54.6.101
     Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, mono,
 s16, 705 kb/s
 Stream mapping:
   Stream #0:0 -> #0:0 (mp3 -> pcm_s16le)
 Press [q] to stop, [?] for help
 Segmentation fault (core dumped)
 }}}

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1692#comment:10>
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