Generating tiles return empty tiles directories tree#19

I cloned the project and tested it as well. No problem. But when I try it with My own image the result is just empty directories, no images inside. I exported the image from Gimp, maybe there are an option to set the get the right jpg format? Test on Ubuntu ``` python3 ../gdal2tiles-multiprocess.py -l -p raster map.jpg tiles Generating Base Tiles: Generating Overview Tiles: ``` Compressed version with the same issue [map2.zip](https://github.com/commenthol/gdal2tiles-leaflet/files/5147531/map2.zip) Edit I tested ``` python3 ../gdal2tiles.py -l -p raster map2.jpg tiles Generating Base Tiles: ERROR 6: Reading this image would require libjpeg to allocate at least 3774873600 bytes. This is disabled since above the 104857600 threshold. You may override this restriction by defining the GDAL_ALLOW_LARGE_LIBJPEG_MEM_ALLOC environment variable, or recompile GDAL by defining the GDAL_LIBJPEG_LARGEST_MEM_ALLOC macro to a value greater than 104857600 ERROR 1: map2.jpg, band 1: IReadBlock failed at X offset 0, Y offset 0: Reading this image would require libjpeg to allocate at least 3774873600 bytes. This is disabled since above the 104857600 threshold. You may override this restriction by defining the GDAL_ALLOW_LARGE_LIBJPEG_MEM_ALLOC environment variable, or recompile GDAL by defining the GDAL_LIBJPEG_LARGEST_MEM_ALLOC macro to a value greater than 104857600 ``` I tried to add GDAL_ALLOW_LARGE_LIBJPEG_MEM_ALLOC=yes as an env variable but no success