OSGeo4w 2.2 build missing ECW support

[qgib]

Author Name: Nathan Woodrow (@NathanW2)
Original Redmine Issue: 10175
Affected QGIS version: 2.2.0

Assignee: Jürgen Fischer

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Seems the ECW support no longer works in the 2.2 build of OSGeo4W (32) bit. Might be related to the 1.11 GDAL update as 2.2 is still on 1.10. Not sure but just guessing as ECWs work in qgis-dev.

[qgib]

Author Name: Jürgen Fischer (@jef-n)

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QGIS 2.2 is built against GDAL 1.10.

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• status_id was changed from Open to Closed
• resolution was changed from to up/downstream

[qgib]

Author Name: Nathan Woodrow (@NathanW2)

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And we can't have both gdal plugin versions installed? Is that correct?

[qgib]

Author Name: Jürgen Fischer (@jef-n)

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See also http://trac.osgeo.org/osgeo4w/ticket/417

[qgib]

Author Name: Miroslav Umlauf (@mirouml)

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Does this link from QGIS FAQ helps as workaround before the whole problem will be solved? http://www.faunalia.com/content/adding-ecw-support-quantum-gis

[qgib]

Author Name: Giovanni Manghi (@gioman)

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Miroslav Umlauf wrote:

Does this link from QGIS FAQ helps as workaround before the whole problem will be solved? http://www.faunalia.com/content/adding-ecw-support-quantum-gis

it should work, but use this

http://www.gisinternals.com/sdk/Download.aspx?file=release-1600-gdal-1-10-1-mapserver-6-4-1\\gdal-110-1600-ecw.msi

[qgib]

Author Name: Miroslav Umlauf (@mirouml)

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Thank you. I have installed that msi but there is only gdal_ECW_JP2ECW.dll (no libecwj2.dll). Also gdal_ECW_JP2ECW.dll is already in folder C:\OSGeo4W64\bin\gdalplugins.

Update: On Win 8/32 and OSGeo4W, QGIS 2.2 it works. After installing http://www.gisinternals.com/sdk/Download.aspx?file=release-1600-gdal-1-10-1-mapserver-6-4-1\\gdal-110-1600-ecw.msi I took the C:\Program Files\GDAL\NCSEcw.dll and C:\Program Files\GDAL\gdalplugins\gdal_ECW_JP2ECW.dll and overwritten existing dlls in C:\OSGeo4W\bin\NCSEcw.dll and C:\OSGeo4W\bin\gdalplugins\gdal_ECW_JP2ECW.dll.

After some more testing only the C:\OSGeo4W\bin\gdalplugins\gdal_ECW_JP2ECW.dll is needed to replace on Win 8/32.

On Win 7 64 it is needed to download http://www.gisinternals.com/sdk/Download.aspx?file=release-1600-x64-gdal-1-10-1-mapserver-6-4-1\\gdal-110-1600-x64-ecw.msi and copy the C:\Program Files\GDAL\gdalplugins\gdal_ECW_JP2ECW.dll to C:\OSGeo4W64\bin\gdalplugins\gdal_ECW_JP2ECW.dll

[qgib]

Author Name: Jürgen Fischer (@jef-n)

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This is not a qgis problem - hence I closed the ticket. QGIS 2.2 in OSGeo4W is built against GDAL 1.10. OSGeo4W moved on to GDAL 1.11. There is a compatibility package that provides GDAL 1.10 that QGIS 2.2 uses, but that doesn't extent to the plugins. qgis-dev (the master build) is built against GDAL 1.11.

If you need QGIS with GDAL plugins, you can still use the standalone installer for 2.2 (it has GDAL 1.10) or qgis-dev. Downgrading GDAL and it's plugins to 1.10 in OSGeo4W is also an option - but that will likely break qgis-dev.

[qgib]

Author Name: Andre Joost (Andre Joost)

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I wrote a workaround here:

http://gis.stackexchange.com/questions/102193/how-to-change-gdal-version-in-qgis-to-get-ecw-import-to-work

Downgrading the ecw driver in OSGEO4W still works.

QGIS 2.4 should solve the problem anyway.