On Tue, Mar 5, 2024 at 15:18 (+0100), Taco Hoekwater wrote:
On 4 Mar 2024, at 15:30, Jim
wrote:
Recently I've been trying to make some PDFs smaller by using better compression of JPEG pictures.
I was happy to see that \externalfigure cheerfully accepts .jp2 (JPEG 2000) files. However, my understanding (and I could well be wrong, but I've seen it multiple places) is that JPEG 2000 *Part 2* files should have extension .jpx, not .jp2.
By default, ConTeXt does not recognize .jpx. But if I rename a .jpx file to have a .jp2 extension, then ConTeXt properly processes the file and I see the picture in the PDF.
Q: are there any plans to make ConTeXt recognize the .jpx extension? If not, can anyone suggest some ConTeXt code which allows me to tell ConTeXt to process a .jpx file as a .jp2 file?
The recognised extensions are specified in a table in grph-inc.lmt, I don’t think you can alter that table runtime.
But it is possible to do
\externalfigure[method=jp2,file=….jpx]
Untested, but should work.
Taco, I could not get that to work, but I did get \externalfigure[somefile.jpx][method=jp2] to work. Thanks very much for leading me to that solution. Jim