https://bugs.winehq.org/show_bug.cgi?id=9127
--- Comment #80 from Yevgeniy miltenfiremage@gmail.com --- (In reply to Yevgeniy from comment #79)
If it's really about patents, while I'm not sure exactly which one was the problem, Wikipedia says that all of MPEG1, MPEG2 and MP3 patents have already expired, some relatively recently.
Sorry about the formatting, I'm kinda new to bugzilla. Also, I just reread what I myself posted and noticed there are some patents remaining outside of US for MPEG2, though I'm not sure how much they affect.