Trouble compressing large raw image

[rasweet]

I have a raw image in BIP (RGB,RGB,...) format of width 55722, height 25274, 8 bit precision. When I attempt to use opj_compress using

\opj_compress -i f:\epsgRGBbip.raw -o epsgCompopj_exact.jp2 -F 55722,25274,3,8,u

I get the error message:

Unable to load raw file

Does opj_compress attempt to read in the entire input file before compressing? If so, is there any code available to read in just a few lines at a time? If not, is the compress source code sufficiently modularized that I could modify the input reader rather easily? (I have done similar mods many times with Kakadu.)

I'm hoping to save myself a lot of trouble, if it is impossible to compress big images with opj_compress.

Thanks,
Roland Sweet

[rouault]

Yes, opj_compress cannot handle big input files. Other tools such as gdal_translate from GDAL can use openjpeg to create large JP2 files, provided reasonable tiles are used.

[rasweet]

Thank you for the prompt reply. -- Roland