#5067: crash on Mapping Multicast TV Stream to HLS with "Exactly one WebVTT 
stream
is needed" as message
-------------------------------------+-------------------------------------
             Reporter:               |                    Owner:
  cloudclimber                       |                   Status:  new
                 Type:  defect       |                Component:
             Priority:  important    |  undetermined
              Version:  2.8.3        |               Resolution:
             Keywords:  webvtt hls   |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------

Comment (by cehoyos):

 The output is unfortunately useless because it contains no debug
 information.
 Is the issue only reproducible with udp input or also with file input? To
 test, you have to dump the udp stream to a file, if you don't know how to
 do this, please try (one of) the three possibilities:
 * {{{mplayer -dumpstream}}}
 * {{{ffmpeg -f data -i udp://@239.100.1.1:1234 -map 0 -codec copy -f data
 out.ts}}}
 * or use tools/aviocat but you would have to compile it and if you can
 compile, you can also provide a backtrace with debug information.

--
Ticket URL: <https://trac.ffmpeg.org/ticket/5067#comment:5>
FFmpeg <https://ffmpeg.org>
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