[FFmpeg-trac] #11146(avformat:new): "concat" demuxer with resizing filters generated output of incomplete video

[FFmpeg]

#11146: "concat" demuxer with resizing filters generated output of incomplete video
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             Reporter:  degradox    |                    Owner:  (none)
                 Type:  defect      |                   Status:  new
             Priority:  normal      |                Component:  avformat
              Version:  git-master  |               Resolution:
             Keywords:  concat      |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  0           |
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Comment (by degradox):

 There are 3 "types" of concat:

 According to [https://trac.ffmpeg.org/wiki/Concatenate wiki] there are 3
 types of concatenation:

 * concat demuxer
 * concat protocol
 * concat filter

 but according to documentation there's only one concat:
 [https://www.ffmpeg.org/ffmpeg-filters.html#toc-concat 18.9 concat], and
 basically is for files that have the same type of stuff:

 > All segments must have the same number of streams of each type, and that
 will also be the number of streams at output.

 Can somebody with enough knowledge sort this out? Most ffmpeg users that
 rely on documentation are so confused, everything is kinda fuzzy and there
 no clear examples.
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Ticket URL: <https://trac.ffmpeg.org/ticket/11146#comment:22>
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