API changes, most recent first:
+2014-05-26 - xxxxxxx - lavu 52.87.100 - threadmessage.h
+ Add thread message queue API.
+
+2014-05-26 - c37d179 - lavf 55.41.100 - avformat.h
+ Add format_probesize to AVFormatContext.
+
2014-05-19 - xxxxxxx - lavf 55.18.0 - avformat.h
Add av_stream_get_side_data() to access stream-level side data
in the same way as av_packet_get_side_data().
Add AV_FRAME_DATA_DISPLAYMATRIX for exporting frame-level
spatial rendering on video frames for proper display.
-2014-05-xx - xxxxxxx - lavc 55.52.0 - avcodec.h
+2014-05-xx - xxxxxxx - lavc 55.64.100 / 55.53.0 - avcodec.h
Add AV_PKT_DATA_DISPLAYMATRIX for exporting packet-level
spatial rendering on video frames for proper display.