[FFmpeg-trac] #2579(avformat:open): Data stream from UAV video reported as "Unknown" type

[FFmpeg]

#2579: Data stream from UAV video reported as "Unknown" type
-------------------------------------+-------------------------------------
             Reporter:  mleotta      |                    Owner:
                 Type:  defect       |                   Status:  open
             Priority:  important    |                Component:  avformat
              Version:  git-master   |               Resolution:
             Keywords:  mpegts       |               Blocked By:
  regression                         |  Reproduced by developer:  0
             Blocking:               |
Analyzed by developer:  0            |
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Comment (by mleotta):

 The patch I have attached provides one possible solution.  It partially
 reverts the change from e78d1a59 for the case where the media type was
 previously unknown.

 The resulting output becomes
 {{{
     Stream #0:1[0x1f1]: Data: none ([21][0][0][0] / 0x0015)
 }}}

 I think this comes down to a design decision.  If a stream type is unknown
 do you treat it as "Unknown" and allow no access to the data, or do you
 treat it as "Data" of an unknown format.  I prefer the latter because it
 allows the downstream developer to have access to the data and make use of
 it if they know how.

 Another solution to this problem is to "register" this particular type of
 data stream so that it is not unknown.  I don't know enough about the
 stream type or how the code works to suggest such a patch.  However, I can
 say that this encoding appears to be common for KLV data streams prior to
 the more recent standards.

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2579#comment:9>
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