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I'm loading several bands and images as VRT to obtain a mosaic. Each of these bands can have an offset and/or scale that I'm already taking care of. When transforming the resulting VRT into a TIFF file, the bands don't have this scale and offset applied, instead, these values are noted in the metadata for each band. Is there any way I can apply these scale and offset when building the TIFF with gdalwarp?

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As far as I'm aware gdalwarp can't do this directly, but gdal_translate can be used with the -unscale argument:

-unscale

  Apply the scale/offset metadata for the bands to convert scaled values to unscaled values. It is also often necessary to reset the output datatype with the -ot switch. The unscaled value is computed from the scaled raw value with the following formula:

  unscaled_value = scaled_value * scale + offset

https://gdal.org/programs/gdal_translate.html#cmdoption-gdal_translate-unscale

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