API changes, most recent first:
+2014-01-xx - xxxxxxx - lavc 55.32.1 - avcodec.h
+ Edges are not required anymore on video buffers allocated by get_buffer2()
+ (i.e. as if the CODEC_FLAG_EMU_EDGE flag was always on). Deprecate
+ CODEC_FLAG_EMU_EDGE and avcodec_get_edge_width().
+
2013-12-xx - xxxxxxx - lavu 53.2.0 - frame.h
Add AV_FRAME_DATA_MATRIXENCODING value to the AVFrameSideDataType enum, which
identifies AVMatrixEncoding data.