[FFmpeg-trac] #5923(avcodec:reopened): add support for Kodak PhotoCD image format

[FFmpeg]

#5923: add support for Kodak PhotoCD image format
-------------------------------------+------------------------------------
             Reporter:  ami_stuff    |                    Owner:
                 Type:  enhancement  |                   Status:  reopened
             Priority:  wish         |                Component:  avcodec
              Version:  git-master   |               Resolution:
             Keywords:  pcd          |               Blocked By:
             Blocking:               |  Reproduced by developer:  1
Analyzed by developer:  0            |
-------------------------------------+------------------------------------
Changes (by Balling):

 * status:  closed => reopened
 * resolution:  fixed =>


Comment:

 This is incorrect, Paul. The colorspace used is not
 AVCOL_TRC_IEC61966_2_1, it is AVCOL_TRC_IEC61966_2_4 (or xvYCC). That is
 TransferCharacteristics 11 per H.273. That is what
 https://www5.in.tum.de/lehre/vorlesungen/graphik/info/csc/COL_34.htm says
 and that is what wikipedia says (albeit with a problem in 0.099 v. 0.99).
 https://en.wikipedia.org/wiki/Photo_CD  Again, there is a perfect sample
 here: http://www.tedfelix.com/PhotoCD/REFIMAGE.PCD that should look like
 described in http://www.tedfelix.com/PhotoCD/pcd-102.pdf

 I suppose without proper support for Superwhite YUV headroom, there is no
 way to present this correctly. And that also requires compatible YUV TV.
 There is a idea of HDR images, of course (those are also clarified in
 pcd-102 above).

 Also, 64Base (4096 × 6144) is not implemented. It was implemented here in
 February 2020.
 https://sourceforge.net/projects/pcdtojpeg/files/pcdtojpeg/pcdtojpeg%201.0.14/
 (source code inside).

 It is very important to get this correctly because the very famous Kodak
 test images have highest quality in that format.
 https://www.math.purdue.edu/~lucier/PHOTO_CD/IMAGES/

--
Ticket URL: <https://trac.ffmpeg.org/ticket/5923#comment:5>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker