[FFmpeg-trac] #6609(ffmpeg:new): SamplingRateBox should be used if the value is greater than INT16_MAX

FFmpeg trac at avcodec.org
Wed Aug 23 16:52:36 EEST 2017


#6609: SamplingRateBox should be used if the value is greater than INT16_MAX
-------------------------------------+-------------------------------------
             Reporter:  fbeaufort    |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:  ffmpeg       |                  Version:
             Keywords:  flac,        |  unspecified
  isobmff, mp4                       |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug:

 SamplingRateBox should be used if the value is greater than INT16_MAX

 How to reproduce:
 1. Grab file from https://storage.googleapis.com/media-session/bear-
 1280x720.mp4
 2. Run ffmpeg command below
 {{{
 % ffmpeg -i bear-1280x720.mp4 -map 0:0 -acodec flac -strict -2 -ar 192000
 bear-flac-192kHz.mp4
 }}}
 3. The `bear-flac-192kHz.mp4` file should have a valid sample rate, not 0.

 Here are some #ffmpeg logs for some context:

 {{{
 12:58:08 PM <jya> you can create a bug that the SamplingRateBox (as per
 ISO 14496-2 12.2.3.2) is to be used if the value is greater than INT16_MAX
 12:59:14 PM <jya> they have provision for that inthe SoundDescription V2,
 but i can't find this anywhere in the spec
 12:59:20 PM <jya> must be a QT thing
 1:00:14 PM <jya> and if they properly create a SamplingRateBox, need to
 file a bug in Firefox that our mp4 demuxer doesn't support it :)
 }}}

 And here's the ffmpeg version:
 {{{
 % ffmpeg -version
 ffmpeg version 3.3.3-static http://johnvansickle.com/ffmpeg/  Copyright
 (c) 2000-2017 the FFmpeg developers
 }}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/6609>
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