Process API - TIFF transparency

Clarification

Running

gdal_translate in.tiff out.tif -b 1 -b 2 -b 3 -b 4

solves the issue - gdalinfo doesn’t report any warnings, the bands look like:

Band 1 Block=864x2 Type=Byte, ColorInterp=Red
  Mask Flags: PER_DATASET ALPHA
Band 2 Block=864x2 Type=Byte, ColorInterp=Green
  Mask Flags: PER_DATASET ALPHA
Band 3 Block=864x2 Type=Byte, ColorInterp=Blue
  Mask Flags: PER_DATASET ALPHA
Band 4 Block=864x2 Type=Byte, ColorInterp=Alpha