Hi
I'm having problems creating a jpeg compressed tif with ARGB pixel format with
gdal_translate.
I tried the command
gdal_translate pngWithAlpha.png 3.tif -b 1 -b 2 -b 3 -mask 4 -co alpha=yes -co
COMPRESS=JPEG --config GDAL_TIFF_INTERNAL_MASK YES
as it appears in the gdal_translate documentation, but the image I'm getting
doesn't have an alpha channel.
c:\Users\Atlas\Pictures>gdalinfo 3.tif
Driver: GTiff/GeoTIFF
Files: 3.tif
Size is 480, 360
Coordinate System is `'
Image Structure Metadata:
COMPRESSION=JPEG
INTERLEAVE=PIXEL
Corner Coordinates:
Upper Left ( 0.0, 0.0)
Lower Left ( 0.0, 360.0)
Upper Right ( 480.0, 0.0)
Lower Right ( 480.0, 360.0)
Center ( 240.0, 180.0)
Band 1 Block=480x16 Type=Byte, ColorInterp=Red
Mask Flags: PER_DATASET
Band 2 Block=480x16 Type=Byte, ColorInterp=Green
Mask Flags: PER_DATASET
Band 3 Block=480x16 Type=Byte, ColorInterp=Blue
Mask Flags: PER_DATASET
I also tried without the -mask option, in which case I get errors:
ERROR 1: JPEGLib:Bogus input colorspace
ERROR 1: WriteEncodedTile/Strip() failed.
I'm using gdal 1.9.1 x64 on windows 7 64 bit.
Is there another way to do this, or is it a known limitation of the tiff driver?
Thanks
Yehiyam
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