[FFmpeg-trac] #2621(FFprobe:new): ffprobe should output formatted information about detection reliability

[FFmpeg]

#2621: ffprobe should output formatted information about detection reliability
-------------------------------------+-------------------------------------
             Reporter:               |                     Type:
  ahthovaikied                       |  enhancement
               Status:  new          |                 Priority:  normal
            Component:  FFprobe      |                  Version:  git-
             Keywords:  ffprobe      |  master
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
-------------------------------------+-------------------------------------
 Sometimes ffprobe misdetects text files as mp3, but it outputs a log
 message about a possible misdetection:
 {{{
 $ ffprobe text_file.log
 ffprobe version N-53746-gec34963 Copyright (c) 2007-2013 the FFmpeg
 developers
   built on Jun  1 2013 22:57:16 with gcc 4.6 (Ubuntu/Linaro
 4.6.3-1ubuntu5)
   configuration: --enable-gpl --enable-version3 --enable-nonfree --enable-
 x11grab --disable-encoder=vorbis --disable-encoder=aac --enable-
 libopencore-amrnb --enable-libopencore-amrwb --enable-libfdk-aac --enable-
 librtmp --enable-libmp3lame --enable-libtheora --enable-libvorbis
 --enable-libvpx --enable-libx264 --enable-libxvid --enable-libopus
 --disable-runtime-cpudetect --disable-ffserver --disable-debug
 --cpu=corei7
   libavutil      52. 34.100 / 52. 34.100
   libavcodec     55. 13.100 / 55. 13.100
   libavformat    55.  8.102 / 55.  8.102
   libavdevice    55.  2.100 / 55.  2.100
   libavfilter     3. 74.101 /  3. 74.101
   libswscale      2.  3.100 /  2.  3.100
   libswresample   0. 17.102 /  0. 17.102
   libpostproc    52.  3.100 / 52.  3.100
 [mp3 @ 0x19df260] Format mp3 detected only with low score of 1,
 misdetection possible!
 [mp3 @ 0x19df260] Estimating duration from bitrate, this may be inaccurate
 Input #0, mp3, from 'text_file.log':
   Duration: 00:00:00.29, start: 0.000000, bitrate: 128 kb/s
     Stream #0:0: Audio: mp1, 48000 Hz, stereo, s16p, 128 kb/s
 }}}


 However when making ffprobe output formatted data (ie. JSON), the
 information about the low detection reliability is not present:
 {{{
 $ ffprobe -loglevel quiet -print_format json -show_format text_file.log
 {
     "format": {
         "filename": "text_file.log",
         "nb_streams": 1,
         "format_name": "mp3",
         "format_long_name": "MP2/3 (MPEG audio layer 2/3)",
         "start_time": "0.000000",
         "duration": "0.293375",
         "size": "4694",
         "bit_rate": "128000"
     }
 }
 }}}

 The addition of a field in the formatted output with a value about the
 detection reliability would be great and solve that problem.
 It would be especially useful for scripts and programs that rely on
 ffprobe to analyze files, and therefore do not read or parse the ffprobe
 logging output.

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2621>
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