[gdal-dev] gdal_translate receiving "Warning 6: driver GTiff does not support creation option WEBP_LOSSLESS"

[Marty J. Sullivan]

Thanks for the suggestion. I did actually try to create a plain GTiff and tried with the WEBP_LOSSLESS=TRUE and received the same warning.

It is strange because it does seem to create a WEBP compressed image (I think), gdalinfo seems to suggest that it is, so maybe I should just ignore the warning? It just seems like an odd error to receive if WEBP_LOSSLESS is in fact working.

Marty

On 1/14/21, 5:28 PM, "gdal-dev on behalf of jratike80" <gdal-dev-bounces at lists.osgeo.org on behalf of jukka.rahkonen at maanmittauslaitos.fi> wrote:

    Hi,

    I would also have a try by actually using -co WEBP_LOSSLESS=True even by the
    error message it is perhaps automatically applied.

    -Jukka Rahkonen-


    Marty J. Sullivan wrote
    > Hello,
    > 
    > I am attempting to create a COG format GeoTIFF with WEBP_LOSSLESS
    > compression using GDAL.
    > 
    > I have compiled GDAL 3.2.1 from source with libwebp 0.4.2 installed from
    > Debian Buster repos (I’ve also tried with libwebp v1.1.0 installed from
    > source, no difference). When I run the ./configure script before
    > compiling, WEBP support is listed as “Yes”
    > 
    > When I try to create a COG with gdal_translate, and setting QUALITY=100,
    > GDAL returns “Warning 6: driver GTiff does not support creation option
    > WEBP_LOSSLESS”
    > 
    > I would expect that WEBP_LOSSLESS would work because the documentation for
    > the GTiff driver states “WEBP_LOSSLESS=True/False: (GDAL >= 2.4.0 and
    > libwebp >= 0.1.4): By default, lossy compression is used. If set to True,
    > lossless compression will be used.”
    > 
    > Here is the command I am running, it works fine when running with another
    > compression (or choosing QUALITY=99 for WEBP)
    > 
    > gdal_translate -of COG -co COMPRESS=WEBP -co QUALITY=100 -co
    > NUM_THREADS=ALL_CPUS -co RESAMPLING=NEAREST -co
    > OVERVIEW_RESAMPLING=NEAREST -co WARP_RESAMPLING=NEAREST -co OVERVIEWS=AUTO
    > -co TILING_SCHEME=CUSTOM -co ZOOM_LEVEL_STRATEGY=UPPER input.tif
    > output.tif
    > 
    > Thanks for any guidance on getting WEBP_LOSSLESS to work!
    > 
    > Marty Sullivan
    > Cornell University
    > 
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    > gdal-dev mailing list

    > gdal-dev at .osgeo

    > https://lists.osgeo.org/mailman/listinfo/gdal-dev





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