Are libav and x264 DFSG-free now?

[Eugen Dedu]

Hi,

First, a minor incoherence: on 
http://packages.qa.debian.org/liba/libav.html the maintainer field is 
"Debian multimedia packages maintainers", while on 
http://packages.qa.debian.org/x/x264.html it is "Debian Multimedia 
Maintainers", even if both teams are the same team in fact.

And now to my original question.  I have looked on Internet without 
finding the answer.  I would like to know why libav (ffmpeg) and x264 
are now found in main while before they were not.  Why before they were 
considered DFSG non-free, and now they are considered DFSG-free?  Has 
anything changed in the "patents" they code?  Has DSFG-freeness changed? 
  Have ftp-master changed their mind?  More generally, what has changed 
between when they were non-free and now?

Thank you,
-- 
Eugen