there's no "legal" way to do it. just do it anyways.
I heard* a "hidden mark" stays inside the new format (say mp3), so if you share it online, people might find the source.
* It was in the application (converter) instruction.
well mp4 is a video container and mp3 is an audio container so i guess the question would be why are you wanting to convert a movie into an audio file?
Audacity.You could probably capture audio somehow in real time
How can I legally do this?
I'm looking to move my library off of my Mac, and onto a PC without using iTunes, and am trying to use a more "open" file format.
First, the music will be working on the PC just as it worked on the Mac. Why would you not want to use iTunes?
Second, you could for very long time upgrade any DRM'd music that you bought on the iTunes Store to 256 kbit/DRM free. I can't find this on the store anymore.
Third, burn the music onto a CD. Then import it any way you like.