[gdal-dev] gdal2tiles 3.11.3 dies when source files have transparency

[Stefan Gofferje]

Nope...

Creating complete.gdalg.json...
Creating tiles...
0...10...20...30...40...50...60...70...              - estimated 
remaining time: 00:03:53ERROR 1: tile: IReadBlock failed at X offset 
386, Y offset 24: File tilesDir/14/9430/4541.png exists but cannot be 
opened with PNG driver

I can open the file in question with gwenview or GIMP no problem....


On 9/29/25 19:03, Scott via gdal-dev wrote:
> echo "Creating complete.gdalg.json..."
> gdal raster mosaic \
>     --input="cache/*.tif" \
>     --output="complete.gdalg.json" \
>     --resolution=highest \
>     --overwrite
> 
> echo "Creating tiles..."
> gdal raster tile \
>     --input=complete.gdalg.json \
>     --min-zoom=12 --max-zoom=14 \
>     --skip-blank --overview-resampling=cubic \
>     --co ZLEVEL=9 --add-alpha \
>     --output=tilesDir \
>     --progress

-- 
  (o_   Stefan Gofferje            | SCLT, MCP, CCSA
  //\   Reg'd Linux User #247167   | VCP #2263
  V_/_  https://www.gofferje.net   | https://www.saakeskus.fi