Hi,
I rebuilt GDAL (older version: 2.1.2) using this new open jpeg 2.2.0 (https://github.com/uclouvain/openjpeg/releases/download/v2.2.0/openjpeg-v2.2.0-linux-x86_64.tar.gz) and tried to convert two jp2 dataset to tiff (gdal_translate): - bluemarble_4km.jp2: (10800 x 5400 pixels). 37.3 mb file size. - usgsLanSat.jp2: (8627 x 7745 pixels). 48 mb file size. Tests were run on virtual machine with ‘Ubuntu 16.04’ operation system, 18 gb RAM and 2 CPU processors. gdal_translate ‘bluemarble_4km.jp2’ to tiff: - OpenJpeg 2.1.2: 13m34s: first run 13m35s: second run - OpenJpeg 2.2.0: 13m45: first run 14m20s: second run gdal_translate ‘usgsLanSat.jp2’ to tiff: - OpenJpeg 2.1.2: 16m52s: first run 17m04s: second run - OpenJpeg 2.2.0: 18m13s: first run 17m54s: second run These results were not expected since the new openJpeg should be faster than the previous one. Could this be cause by 'gdal_translate' not using threads that the new openjpeg uses for performance boost ? Or could it one of GDAL configuration or the built version of OpenJpeg need to be rebuilt using different config ? Thanks Noureddine Farah ________________________________ From: N. Farah <nfa...@hotmail.com> Sent: Monday, August 14, 2017 11:42:31 AM To: Even Rouault; gdal-dev@lists.osgeo.org Subject: Re: [gdal-dev] Fwd: [OpenJPEG] OpenJPEG 2.2.0 is out ! Faster and safer. Right...since GDAL does not ship the 3rd party lib(s). Thanks again ________________________________ From: Even Rouault <even.roua...@spatialys.com> Sent: Monday, August 14, 2017 4:49:09 AM To: gdal-dev@lists.osgeo.org Cc: N. Farah Subject: Re: [gdal-dev] Fwd: [OpenJPEG] OpenJPEG 2.2.0 is out ! Faster and safer. On dimanche 13 août 2017 15:57:54 CEST N. Farah wrote: > Great news. Thanks for the work. > > > Any plans to integrate this new version in GDAL ? Well, there's nothing to change in the GDAL source code. The existing JP2OpenJPEG driver will work with OpenJPEG 2.2. It is just a matter of recompiling libopenjp2. Even -- Spatialys - Geospatial professional services http://www.spatialys.com
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