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

[Even Rouault]

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

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