API changes, most recent first:
+
+2015-12-22 - xxxxxxx - lavfi 6.21.101 - avfilter.h
+ Deprecate avfilter_link_set_closed().
+ Applications are not supposed to mess with links,
+ they should close the sinks.
+
+2015-12-17 - lavc 57.18.100 / 57.11.0 - avcodec.h dirac.h
+ xxxxxxx - Add av_packet_add_side_data().
+ xxxxxxx - Add AVCodecContext.coded_side_data.
+ xxxxxxx - Add AVCPBProperties API.
+ xxxxxxx - Add a new public header dirac.h containing
+ av_dirac_parse_sequence_header()
+
+2015-12-11 - xxxxxxx - lavf 57.20.100 - avformat.h
+ Add av_program_add_stream_index()
+
+2015-11-29 - xxxxxxx - lavc 57.16.101 - avcodec.h
+ Deprecate rtp_callback without replacement, i.e. it won't be possible to
+ get image slices before the full frame is encoded any more. The libavformat
+ rtpenc muxer can still be used for RFC-2190 packetization.
+
2015-11-xx - xxxxxxx - lavc 57.16.0 - avcodec.h
Add AV_PKT_DATA_FALLBACK_TRACK for making fallback associations between
streams.