[FFmpeg-trac] #10190(undetermined:new): jpeg rgb file with subsampling decodes incorrectly

[FFmpeg]

#10190: jpeg rgb file with subsampling decodes incorrectly
-------------------------------------+-------------------------------------
             Reporter:  ami_stuff    |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 https://raw.githubusercontent.com/libjxl/testdata/1405a214a8232991c585dc2164b5dec5bd559a33/jxl/flower/flower.png.im_q85_rgb_subsample_blue.jpg

 it has 4:4:1 (22:22:11) subsampling

 {{{
 ./ffmpeg -i flower.png.im_q85_rgb_subsample_blue.jpg -y out.bmp
 ffmpeg version N-109855-g2296078397 Copyright (c) 2000-2023 the FFmpeg
 developers
   built with gcc 9 (Ubuntu 9.4.0-1ubuntu1~20.04.1)
   configuration:
   libavutil      58.  1.100 / 58.  1.100
   libavcodec     60.  2.100 / 60.  2.100
   libavformat    60.  2.100 / 60.  2.100
   libavdevice    60.  0.100 / 60.  0.100
   libavfilter     9.  1.100 /  9.  1.100
   libswscale      7.  0.100 /  7.  0.100
   libswresample   4.  9.100 /  4.  9.100
 Input #0, image2, from 'flower.png.im_q85_rgb_subsample_blue.jpg':
   Duration: 00:00:00.04, start: 0.000000, bitrate: 215322 kb/s
   Stream #0:0: Video: mjpeg (Baseline), yuvj444p(pc,
 bt470bg/unknown/unknown), 2268x1512, 25 fps, 25 tbr, 25 tbn
 Stream mapping:
   Stream #0:0 -> #0:0 (mjpeg (native) -> bmp (native))
 Press [q] to stop, [?] for help
 [swscaler @ 0x55bc14914d40] deprecated pixel format used, make sure you
 did set range correctly
     Last message repeated 3 times
 Output #0, image2, to 'out.bmp':
   Metadata:
     encoder         : Lavf60.2.100
   Stream #0:0: Video: bmp, bgr24(pc, gbr/unknown/unknown, progressive),
 2268x1512, q=2-31, 200 kb/s, 25 fps, 25 tbn
     Metadata:
       encoder         : Lavc60.2.100 bmp
 frame=    0 fps=0.0 q=-0.0 size=       0kB time=00:00:00.00 bitrate=N/A
 speed=N/[image2 @ 0x55bc147d68c0] The specified filename 'out.bmp' does
 not contain an image sequence pattern or a pattern is invalid.
 [image2 @ 0x55bc147d68c0] Use a pattern such as %03d for an image sequence
 or use the -update option (with -frames:v 1 if needed) to write a single
 image.
 frame=    1 fps=0.0 q=-0.0 Lsize=N/A time=00:00:00.00 bitrate=N/A speed=
 0x
 video:10047kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
 muxing overhead: unknown
 }}}
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/10190>
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