Libav useful
------------

http://www.libav.org/doxygen/release/0.8/deprecated.html
http://www.libav.org/doxygen/release/9/deprecated.html

https://wiki.libav.org/Migration/10
https://wiki.libav.org/Migration/11

https://github.com/libav/libav/blob/release/9/doc/APIchanges
https://github.com/libav/libav/blob/release/10/doc/APIchanges
https://github.com/libav/libav/blob/master/doc/APIchanges

FFmpeg
------

https://github.com/FFmpeg/FFmpeg/tree/master/doc
--> https://github.com/FFmpeg/FFmpeg/blob/master/doc/writing_filters.txt

