Hmmm.. still foobar's optimizing doesnt work for me somehow.
In this case, MP4Muxer is useful indeed. I would really like to contribute rockbox. But dont know how, and anyway there are only tools for mp3. Strangely, no one thought about mp4. It would require add new entry for this format.
I think i would find time also to translate rbutility to polish, if anyone didnt start it yet. But how?
(forgive me that noob question
) I suppose i should register first?