[gdal-dev] VRT Derived Bands from Python?

[Knut-Frode Dagestad]

Hi,

Derived Bands of the VRT format seems like a very powerful resource. 
 From the tutorial (http://www.gdal.org/gdal_vrttut.html) it is clear 
that the Pixel Functions themselves have to be written in C, which is 
probably anyway best for performance.
I also get the impression that the corresponding VRT files with Derived 
Bands can only be used by applications written in C/C++, since the Pixel 
Functions are only available inside the scope of such an application 
program:
http://gis.stackexchange.com/questions/2940/gdal-pixel-functions-question

Does this mean that Pixel Functions can not be used by command line 
utilities (e.g. gdalwarp and gdal_translate) or from Python?

Best regards from Knut-Frode