[FFmpeg-trac] #8185(ffmpeg:new): Create thumbnails from MPEG-DASH stream

[FFmpeg]

#8185: Create thumbnails from MPEG-DASH stream
-------------------------------------+-------------------------------------
             Reporter:  zivkovicjan  |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:  ffmpeg       |                  Version:  git-
             Keywords:  dash stream  |  master
  thumbnail                          |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug:
 I'm trying to process video images with openCV using ffmpeg for capturing
 of streams and have found an issue with DASH streams. I have also found a
 working example of DASH stream for reference.

 Working DASH stream:
 http://irtdashreference-i.akamaihd.net/dash/live/901161/bfs/manifestBR.mpd
 Not working DASH stream:
 https://irtdashreference-i.akamaihd.net/dash/live/901161/bfs/manifestARD.mpd

 How to reproduce:
 1. Have ffmpeg, any version, reproduced with:
 - latest nightly (N-94982-gea673a0edb) for windows
 - 4.1.4 for windows
 - 3.4.6-0ubuntu0.18.04.1 linux(ubuntu)

 2. Run the provided ffmpeg command
 {{{
 % ffmpeg -i
 https://irtdashreference-i.akamaihd.net/dash/live/901161/bfs/manifestARD.mpd
 -vf fps=1/10 img%03d.jpg
 }}}
 3. ffmpeg starts displaying error messages
 {{{
 [dash @ 000001520cc98640] No longer receiving stream_index 1
 [dash @ 000001520cc98640] No longer receiving stream_index 2
 [dash @ 000001520cc98640] No longer receiving stream_index 3
 [dash @ 000001520cc98640] No longer receiving stream_index 4
 [dash @ 000001520cc98640] No longer receiving stream_index 5
 [dash @ 000001520cc98640] No longer receiving stream_index 6
 [https @ 000001520d278340] HTTP error 404 Not Found bitrate=N/A
 speed=16.6x
 [dash @ 000001520cc98640] Failed to open fragment of playlist 0
 [https @ 000001520d277fc0] HTTP error 404 Not Found
 [dash @ 000001520cc98640] Failed to open fragment of playlist 0
 }}}

 Using command ffplay with the "not working stream", content plays just
 fine. There seems to be a problem only with capturing thumbnail images.
 {{{
 ffplay
 https://irtdashreference-i.akamaihd.net/dash/live/901161/bfs/manifestARD.mpd
 }}}

 Using verbose logs I noticed that ffmpeg was trying to fetch parts of DASH
 stream not yet made/streamed ie. fetching stream from future. Because
 there is no content yet, 404 error is output.
 If I try the url that returned 404 in  chrome (10 sec later) I get the
 response with movie, but if I try it as soon as the error appears there is
 no content (404).

 I have also attached the report file generated by ffmpeg on latest nightly
 version for windows.

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Ticket URL: <https://trac.ffmpeg.org/ticket/8185>
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