[FFmpeg-trac] #9085(avcodec:new): JPEG: YCCK and PhotoYCC support

[FFmpeg]

#9085: JPEG: YCCK and PhotoYCC support
------------------------------------+-----------------------------------
             Reporter:  Balling     |                    Owner:
                 Type:  defect      |                   Status:  new
             Priority:  normal      |                Component:  avcodec
              Version:  git-master  |               Resolution:
             Keywords:  mjpeg cmyk  |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  0           |
------------------------------------+-----------------------------------

Comment (by Balling):

 Well, we can reopen #3426...

 {{{
 ffmpeg -i Channel_digital_image_CMYK_color.jpg colour.png
 ffmpeg version N-100815-g37f76c81d6 Copyright (c) 2000-2021 the FFmpeg
 developers
   built with gcc 9.3-win32 (GCC) 20200320
   configuration: --prefix=/ffbuild/prefix --pkg-config-flags=--static
 --pkg-config=pkg-config --cross-prefix=x86_64-w64-mingw32- --arch=x86_64
 --target-os=mingw32 --enable-gpl --enable-version3 --disable-debug
 --enable-shared --disable-static --disable-w32threads --enable-pthreads
 --enable-iconv --enable-zlib --enable-libxml2 --enable-libfreetype
 --enable-libfribidi --enable-gmp --enable-lzma --enable-fontconfig
 --enable-opencl --enable-libvmaf --enable-vulkan --enable-libvorbis
 --enable-amf --enable-libaom --enable-avisynth --enable-libdav1d --enable-
 libdavs2 --enable-ffnvcodec --enable-cuda-llvm --enable-libglslang
 --enable-libass --enable-libbluray --enable-libmp3lame --enable-libopus
 --enable-libtheora --enable-libvpx --enable-libwebp --enable-libmfx
 --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg
 --enable-librav1e --enable-librubberband --enable-schannel --enable-sdl2
 --enable-libsoxr --enable-libsrt --enable-libsvtav1 --enable-libtwolame
 --enable-libuavs3d --enable-libvidstab --enable-libx264 --enable-libx265
 --enable-libxavs2 --enable-libxvid --enable-libzimg --extra-
 cflags=-DLIBTWOLAME_STATIC --extra-cxxflags= --extra-ldflags=-pthread
 --extra-libs=-lgomp
   libavutil      56. 63.101 / 56. 63.101
   libavcodec     58.119.100 / 58.119.100
   libavformat    58. 65.101 / 58. 65.101
   libavdevice    58. 11.103 / 58. 11.103
   libavfilter     7. 98.100 /  7. 98.100
   libswscale      5.  8.100 /  5.  8.100
   libswresample   3.  8.100 /  3.  8.100
   libpostproc    55.  8.100 / 55.  8.100
 Input #0, image2, from 'Channel_digital_image_CMYK_color.jpg':
   Duration: 00:00:00.04, start: 0.000000, bitrate: 146323 kb/s
     Stream #0:0: Video: mjpeg (Baseline), yuva444p(pc,
 bt470bg/unknown/unknown), 500x333, 25 fps, 25 tbr, 25 tbn, 25 tbc
 Stream mapping:
   Stream #0:0 -> #0:0 (mjpeg (native) -> png (native))
 Press [q] to stop, [?] for help
 Output #0, image2, to 'colour.png':
   Metadata:
     encoder         : Lavf58.65.101
     Stream #0:0: Video: png, rgba(pc, bt470bg/unknown/unknown,
 progressive), 500x333, q=2-31, 200 kb/s, 25 fps, 25 tbn
     Metadata:
       encoder         : Lavc58.119.100 png
 frame=    1 fps=0.0 q=-0.0 Lsize=N/A time=00:00:00.04 bitrate=N/A
 speed=0.267x
 video:496kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
 muxing overhead: unknown
 }}}


 This is not cmyk, it is YCCK (also not Adobe CYYK ?)...

 The main part here is PhotoYCC for PhotoCD though. ;)

--
Ticket URL: <https://trac.ffmpeg.org/ticket/9085#comment:2>
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