I said that I disabled the ECW JP2 plugin and it took *longer* than my previous test. That is, using the Jasper driver takes much longer than the 3-5 min with ECW (for me) or Kakadu (for you).
On Jan 21, 2010, at 8:53 PM, Greg Coats wrote: > My GDAL gdalinfo uses the hardware accelerated Kakadu based JPEG2000 code, > which is up to 10 times faster than the software based Jasper based JPEG2000 > code. So, why then does it take me with the faster GDAL Kakadu JPEG2000 the > same time, several minutes, it takes William with the slower GDAL Jasper? Is > Qgis (mistakenly) not using the faster Kakadu JP2KAK plugin that GDAL > provides when Qgis is accessing .jp2 files, including .jp2 files referenced > in a VRT? > I would think that using Kakadu instead of Jasper for JPEG2000 could yield a > 10 times speed up, but would, to me, not account for the 60 times speed up > that Giovanni Manghi reports he is getting. > William, At your convenience would you please try using the GDAL JP2KAK > plugin and see if Qgis open the project faster than with Jasper? > Greg > > $ gdalinfo --version > GDAL 1.6.3, released 2009/11/19 > $ gdalinfo GeoJPEG2000/18stj/18stj940125.jp2 | head -1 > Driver: JP2KAK/JPEG-2000 (based on Kakadu) > > The GDAL Kakadu JP2KAK plugin, compiled for 32 and 64 bit, under Mac OS X > 10.6 can be downloaded from > http://homepage.mac.com/gregcoats/jp2/images/gdal_JP2KAK.dylib.zip > > $ file /Library/Application\ Support/GDAL/1.6/PlugIns/gdal_JP2KAK.dylib > /Library/Application Support/GDAL/1.6/PlugIns/gdal_JP2KAK.dylib: Mach-O > universal binary with 2 architectures > /Library/Application Support/GDAL/1.6/PlugIns/gdal_JP2KAK.dylib (for > architecture i386): Mach-O bundle i386 > /Library/Application Support/GDAL/1.6/PlugIns/gdal_JP2KAK.dylib (for > architecture x86_64): Mach-O 64-bit bundle x86_64 > > On Jan 21, 2010, at 5:10 PM, William Kyngesburye wrote: > >> On Jan 21, 2010, at 3:45 PM, William Kyngesburye wrote: >> >>> Same setup as Greg (my binaries), takes a few minutes to open. >>> >>> A thought - gdalinfo on the jp2 tiles uses the ECW JP2 driver, which is a >>> plugin on the Mac, but I wonder if the vrt is ignoring plugins and using >>> the builtin jasper driver (slow). >>> >> I guess not - I disabled the ECW plugin and now it takes even longer. > _______________________________________________ > Qgis-user mailing list > Qgis-user@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/qgis-user ----- William Kyngesburye <kyngchaos*at*kyngchaos*dot*com> http://www.kyngchaos.com/ Earth: "Mostly harmless" - revised entry in the HitchHiker's Guide to the Galaxy _______________________________________________ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
