API changes, most recent first:
+2014-05-xx - xxxxxxx - lavf 55.17.1 - avformat.h
+ Deprecate AVStream.pts and the AVFrac struct, which was its only use case.
+ Those fields were poorly defined and not meant to be public, so there is
+ no replacement for them.
+
2014-05-18 - fd05602 - lavc 55.52.0 - avcodec.h
Add avcodec_free_context(). From now on it should be used for freeing
AVCodecContext.