[Libexif-devel] Understanding libjpeg and libexif

[Benny S. <ich...@pa...>]

I am still trying to understand how to open a JPEG file, extract the Exif
header, add data to or change data in the Exif header, and then write the
header back to the JPEG file so that it can be read by ExifPilot or some
other PC application to confirm that the data was written as intended.

 

The documentation at http://libexif.sourceforge.net/api/ is good and I have
studied some of the sample programs.  I have not figured out how to
structure data that I want to store in the Exif header into the correct
format for one of the libexif functions to accept it.

Can anyone tell me where I can learn to do that?

 

I cannot find the equivalent API documentation for the libjpeg file
jpeg-data.c and all of the functions therein.   Can you tell me where to
find it?

 

Benny Smith