[FFmpeg-trac] #4540(undetermined:new): ADX sample count is not written to ADX header

[FFmpeg]

#4540: ADX sample count is not written to ADX header
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             Reporter:  misty        |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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 When FFmpeg encodes ADX files, it hardcodes the sample count to 0:
 http://git.videolan.org/?p=ffmpeg.git;a=blob;f=libavcodec/adxenc.c;h=7736d09b5673f76d112f7fcf21d3e3f304a6080b;hb=HEAD#l111

 The sample count is a 32-bit big-endian value located at 0xC in the
 header. Most ADX decoders rely on the sample count in order to be able to
 play files, and don't infer it from other properties as FFmpeg does; as a
 result, other ADX decoders assume that any files encoded by FFmpeg are 0
 length in duration.

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Ticket URL: <https://trac.ffmpeg.org/ticket/4540>
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