Hello, I think this is a bug report, or maybe a feature request.
I'm writing a script that shells out to gdalwarp. The GTiff files that I might see as input to this script include palette and non-palette images, and I'd like to be able to reliably compress the output without human intervention.
Initially, I tried -co COMPRESS=JPEG on everything in the hopes that gdalwarp would perform the necessary internal conversions to beat the output into a JPEG. This didn't work with palette images, for which I got an error like: "ERROR 1: JPEGSetupEncode:PhotometricInterpretation 3 not allowed for JPEG"
Then I tried setting up a loop that tries JPEG first followed by LZW, but here I ran into difficulty recognizing a failure. The return code for the palette images with all the errors is still 0, just like the return code for a successful warp. The destination image is also populated, so it's not possible to check for existence to determine success.
What I'd love to see is a modification to the command-line behavior of gdalwarp so it can be better used in a scripted setting, where automated ways of detecting failure that don't require reading the error output strings would be incredibly helpful. Ideally, choosing an incompatible creation option would cause a non-zero exit and wouldn't create the destination file.
-mike. ---------------------------------------------------------------- michal migurski- [email protected] 415.558.1610 _______________________________________________ gdal-dev mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/gdal-dev
