The last version increases were:
libavcodec: 2013-03-xx
libavdevice: 2013-03-xx
-libavfilter: 2012-06-22
+libavfilter: 2013-12-xx
libavformat: 2013-03-xx
libavresample: 2012-10-05
libpostproc: 2011-04-18
API changes, most recent first:
+2013-12-xx - xxxxxxx - lavu 52.57.100 - opencl.h
+ Add av_opencl_benchmark() function.
2013-11-xx - xxxxxxx - lavu 52.56.100 - ffversion.h
Moves version.h to libavutil/ffversion.h.
Install ffversion.h and make it public.
+2013-12-xx - xxxxxxx - lavc 55.28.1 - avcodec.h
+ av_frame_alloc(), av_frame_unref() and av_frame_free() now can and should be
+ used instead of avcodec_alloc_frame(), avcodec_get_frame_defaults() and
+ avcodec_free_frame() respectively. The latter three functions are deprecated.
+
+2013-11-xx - xxxxxxx- - lavu 52.20.0 - frame.h
+ Add AV_FRAME_DATA_STEREO3D value to the AVFrameSideDataType enum and
+ stereo3d.h API, that identify codec-independent stereo3d information.
+
2013-11-xx - xxxxxxx- - lavu 52.19.0 - frame.h
Add AV_FRAME_DATA_A53_CC value to the AVFrameSideDataType enum, which
identifies ATSC A53 Part 4 Closed Captions data.