2005.12.24 03:56 "Re: [Tiff] problem reading Photoshop CS2 JPEG-in-TIFF", by Joris Van Damme

JPEGPreDecode: Warning, Improper JPEG sampling factors 2,2 Apparently should be 1,1..

JPEGPreDecode: Warning, Decompressor will try reading with sampling 2,2..

JPEGPreDecode: Improper JPEG sampling factors.

I believe the reason for this may be the auto-correction of YCbCrSubsampling values.

Can you try undefining the macro CHECK_JPEG_YCBCR_SUBSAMPLING from your build?

Looking at the actual code, I'm more confused now. My previous advice may not solve anything, and I'm not even sure CHECK_JPEG_YCBCR_SUBSAMPLING is defined in your build.

Can you mail me such a file?

Joris Van Damme
info@awaresystems.be
http://www.awaresystems.be/
Download your free TIFF tag viewer for windows here:
http://www.awaresystems.be/imaging/tiff/astifftagviewer.html