[FFmpeg-trac] #304(avformat:reopened): wrong detection: "Format mp3 detected only with small score of 1"

[FFmpeg]

#304: wrong detection: "Format mp3 detected only with small score of 1"
-------------------------------------+-------------------------------------
             Reporter:  AndreAdrian  |                    Owner:
                 Type:  defect       |                   Status:  reopened
             Priority:  normal       |                Component:  avformat
              Version:  0.7.1        |               Resolution:
             Keywords:  mp3 mjpeg    |               Blocked By:
  misdetection                       |  Reproduced by developer:  0
             Blocking:               |
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
Changes (by alexschrod):

 * status:  closed => reopened
 * resolution:  needs_more_info =>


Comment:

 I've attached a file that triggers this mp3-detection behavior. This is
 the output from ffmpeg:


 {{{
 ffmpeg version N-76526-ga5202bc Copyright (c) 2000-2015 the FFmpeg
 developers
   built with gcc 5.2.0 (GCC)
   configuration: --enable-gpl --enable-version3 --disable-w32threads
 --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r
 --enable-gnutls --enable-iconv --enable-libass --enable-libbluray
 --enable-libbs2b --enable-libcaca --enable-libdcadec --enable-libfreetype
 --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug
 --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb
 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-
 libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora
 --enable-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-
 libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack
 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs
 --enable-libxvid --enable-lzma --enable-decklink --enable-zlib
   libavutil      55.  5.100 / 55.  5.100
   libavcodec     57. 15.100 / 57. 15.100
   libavformat    57. 14.100 / 57. 14.100
   libavdevice    57.  0.100 / 57.  0.100
   libavfilter     6. 15.100 /  6. 15.100
   libswscale      4.  0.100 /  4.  0.100
   libswresample   2.  0.101 /  2.  0.101
   libpostproc    54.  0.100 / 54.  0.100
 [mp3 @ 005bab20] Format mp3 detected only with low score of 1,
 misdetection possible!
 [mp3 @ 005d21e0] Header missing
     Last message repeated 1 times
 [mp3 @ 005bab20] decoding for stream 0 failed
 [mp3 @ 005bab20] Could not find codec parameters for stream 0 (Audio: mp3,
 0 channels, s16p): unspecified frame size
 Consider increasing the value for the 'analyzeduration' and 'probesize'
 options
 C:\Users\User\Desktop\test2.jpg: could not find codec parameters
 Input #0, mp3, from 'C:\Users\User\Desktop\test2.jpg':
   Duration: N/A, start: 0.000000, bitrate: N/A
     Stream #0:0: Audio: mp3, 0 channels, s16p
 At least one output file must be specified
 }}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/304#comment:3>
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