is lossless MP2 to MPC conversion possible?, goal: reduce bitrate of existing files. Options

[smack]

The wiki articles on Musepack say that it's extended from the MP2 codec, e.g. Hydrogenaudio Wiki and Wikipedia

Does anybody know if it's feasible to losslessly convert MP2 files into MPC files?
If yes, does such a program already exist? (similar to mpc2sv8, the Musepack SV7 to SV8 converter)

Motivation: I'm asking this because I have many gigabytes of MP2 files stored on my hard disks. These are captured DVB radio broadcasts in 320kbps 48kHz stereo MPEG-1 Layer II format. I would like to save some storage space here and hope that Musepack with its more efficient lossless coding method can produce smaller files than MP2.

[smack]

Yes, it is probably possible to losslessly convert from MP2 files to musepack. But even if the entropy coding is better, I don't think you will be able to gain more than 20% of the file size.
I don't know any program that do that (but I may be able to help you if you want to do it).

That's good news! I mean, it would have been even better if such a conversion program already existed. Anyway, I'm going to start by exploring mpc2sv8.

To see if it's possible someone needs to check whether the whole scale factor & quantization part of MPC is MP2-compatible.

Good point. Going to compare mp2 and mpc decoders to find this out.

Well, at least I hope to accomplish that while my motivation lasts...