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I have an old raster that I have to update in the same internal structure. The old one have one band, the new have 4, that gives a factor 5 on data volume.

 

What I want,

 

What I have:

Oh, I found it. Rasterbandselector-rasterbandremover(to drop the alphaband). Again rasterbandselector and RasterPaletteGenerator. Done.

Output file size is down by 70-90%.

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