Feature request: simplifying output filenames

[Munchotaur]

I often extract from directories containing many data files, each with a single media asset embedded. This is usually a png or jpg image. So in this use case there will only be one output file per source file.

Source files are usually something like:
sourcefilename_some-numbers-here.dat

Currently if I run mediaextract -f png * on a list of these files, I'll see output filenames such as:
sourcefilename_some-numbers-here.dat_00000020.png

It would be very useful to be able to omit the source file extension and the numerical suffix (maybe 2 options there?) from the output filename, giving output such as:
sourcefilename_some-numbers-here.png

This would save a lot of renaming after the conversion!