[FFmpeg-trac] #7633(undetermined:new): mpjpeg support broken in 4.1

[FFmpeg]

#7633: mpjpeg support broken in 4.1
-------------------------------------+-------------------------------------
             Reporter:  LubosD       |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug:

 When using the mpjpeg (multi-part JPEG) output in ffmpeg 4.1, the output
 is multi-part, but doesn't contain JPEG images. This worked OK for me with
 ffmpeg 3.4.5.

 Instead of JPEG/JFIF, I can see Lavc being mentioned.

 How to reproduce:
 {{{
 % ffmpeg -i - -f mpjpeg -r 2 -qscale 10 - < mpeg.ts
 ffmpeg version 4.1
 built with gcc 8.2.0 (Gentoo 8.2.0-r5 p1.6)
 }}}

 I'm attaching an example output of the above command.

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Ticket URL: <https://trac.ffmpeg.org/ticket/7633>
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