[gdal-dev] WriteBlock() not supported using JP2ECW driver?

[Even Rouault]

For future doc readers: https://github.com/OSGeo/gdal/pull/9211

Le 07/02/2024 à 20:45, Even Rouault via gdal-dev a écrit :
> Scott,
>>
>> I’m trying to create a JPEG2000 file using the JP2ECW driver, but I’m 
>> getting “WriteBlock() not supported…”.  The same code works using the 
>> PNM driver.
>>
>> What am I missing?
>>
> This comment in the code 
> https://github.com/OSGeo/gdal/blob/0255b1d767bbfc6910d8044e37019f1d1ea5a617/frmts/ecw/ecwcreatecopy.cpp#L1653 
> which basically says that there's some form of Create() support in the 
> JP2ECW driver but you need to write by scanline from top to bottom. 
> The PNM, GTiff etc drivers implement full random-writing, which is 
> what is required typically for gdalwarp. The workaround is either to 
> modify the way you write the file (if you use the API), or if you use 
> GDAL tools to write to an intermediate format (GeoTIFF) and then 
> gdal_translate to JPEG2000 afterwards.
>
> Even
>
> -- 
> http://www.spatialys.com
> My software is free, but my time generally not.
>
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-- 
http://www.spatialys.com
My software is free, but my time generally not.
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