YCbCrSubsampling in EXIF is not updated

cosmin · Post by **cosmin** » Sat Feb 14, 2009 5:37 am

Hello,

I noticed that XnView does not update the YCbCrSubsampling field in EXIF after a lossless JPEG rotation. My digital camera (as well as most others) create JPEGs using chroma subsampling 4:2:2, which in EXIF is encoded as (2,1). After a lossless 90' rotation this should become (1,2), yet XnView leaves it untouched.

This isn't a big problem, the information is encoded in the JPEG datastream anyway, and this EXIF field seems to be ignored by most imaging programs. I just thought you'd like to know about it.

Thank you very much for giving us XnView.

Best regards,
Cosmin