Le mercredi 26 novembre 2014 22:08:43, jplacy2 a écrit : > Thanks Even. Is it true that a recompile from source is necessary to > support other drivers, namely the JasPer JP2 option? I haven't been able > to find any windows binaries that make that driver available. But perhaps > that option only supports three bands as well? I haven't been able to find > a definitive answer.
Yes, you would need to convert from source. Jasper can create a 4-band JPEG2000, but the alpha band will not be tagged as such. And Jasper can have problems converting big images. But that should be OK for a 5920x7700 image. Using OpenJPEG binaries might be easier. > > Thanks again. > > > On Nov 26, 2014, at 10:42 AM, Even Rouault-2 [via OSGeo.org] > > <[email protected]> wrote: > > > > Le mercredi 26 novembre 2014 17:31:34, jplacy2 a écrit : > > > Hi Folks- > > > > > > I'm attempting to generate some 4-band JP2 files using the GDAL 1.11 > > > Win64 binary acquired from gisinternals.com. > > > > > > I quickly ran into a problem... JP2 driver doesn't like four bands: > > > > > > gdal_translate --debug on -of JP2OpenJPEG test.tif test.jp2 > > > GDAL: GDALOpen(test.tif, this=000000000061CB70) succeeds as GTiff. > > > Input file size is 5920, 7700 > > > ERROR 6: Unable to export files with 4 bands > > > GDAL: GDALClose(test.tif, this=000000000061CB70) > > > > > > So my question is simple: what options are there for creating > > > multi-band jpeg2000's with GDAL on the Windows platform? I understand > > > there are other driver options, but from what I have read, they all > > > require a license and/or a recompile of GDAL from the source... the > > > latter is not really in my skill set. > > > > Jim, > > > > This is known as http://trac.osgeo.org/gdal/ticket/5695. The restriction > > has been put, because currently the driver couldn't not produce correct > > RGBA files with the alpha band correctly marked as such. I may have the > > opportunity to work on that in a medium term. > > > > In the meantime, you could perhaps try the opj_compress utility of > > openjpeg ( https://code.google.com/p/openjpeg/wiki/Downloads?tm=2 ), but > > it will likely has the same flow as indicated above if you're interested > > in RGBA images. > > > > Even > > > > > Thanks for any guidance, > > > Jim > > -- > View this message in context: > http://osgeo-org.1560.x6.nabble.com/Multi-band-JPEG2000-support-tp5175104p > 5175169.html Sent from the GDAL - Dev mailing list archive at Nabble.com. -- Spatialys - Geospatial professional services http://www.spatialys.com _______________________________________________ gdal-dev mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/gdal-dev
