Mapserver and the fly conversion of 24bit RGB raster images to 8bit colormapped format

[sylvain.perrinel]

Hello,
I'm trying to make a map with an ecw layer. But, Mapserver does not want 
to convert my 24bit RGB ecw image to 8bit like documentation says : 
http://mapserver.gis.umn.edu/doc35/raster-howto.html#rgb_color_cube .

Gdal support ecw format and the commande "gdalinfo" on the ecw layer 
stops on the color table and doesn't say anything. I think it tries to 
recover the table color !

I verify that my ecw file has three bands, with no classification 
information provided in the mapfile and the first band in the file does 
not have a colormap.

I can't preprocess the rasters because I have 8Tb of images. It would be 
too long...

So is this a bug or a misconfiguration of my mapserver?

Thanks


Notes :
MapServer version 4.4.2 OUTPUT=PNG OUTPUT=JPEG OUTPUT=WBMP OUTPUT=PDF 
SUPPORTS=PROJ SUPPORTS=FREETYPE SUPPORTS=WMS_SERVER SUPPORTS=WMS_CLIENT 
SUPPORTS=WFS_SERVER SUPPORTS=WFS_CLIENT SUPPORTS=WCS_SERVER INPUT=EPPL7 
INPUT=POSTGIS INPUT=OGR INPUT=GDAL INPUT=SHAPEFILE

Mandrake 10.1
Mapserver 4.4.2
GDAL 1.2.6

-- 
Sylvain Perrinel
Ministère de l'Agriculture et de la Pêche
SG/SM/SDSI/CERIT
Département d'Information Géographique (DIG)
Toulouse
France