diff --git a/Changelog b/Changelog
index bff5a1d6b5..834821eef5 100644
--- a/Changelog
+++ b/Changelog
@@ -3,6 +3,7 @@ releases are sorted from youngest to oldest.
 
 version <next>:
 - curves filter
+- reference-counting for AVFrame and AVPacket data
 
 
 version 1.2:
diff --git a/doc/APIchanges b/doc/APIchanges
index d4362c1b56..0b2295c562 100644
--- a/doc/APIchanges
+++ b/doc/APIchanges
@@ -2,10 +2,10 @@ Never assume the API of libav* to be stable unless at least 1 month has passed
 since the last major version increase or the API was added.
 
 The last version increases were:
-libavcodec:    2012-01-27
-libavdevice:   2011-04-18
+libavcodec:    2013-03-xx
+libavdevice:   2013-03-xx
 libavfilter:   2012-06-22
-libavformat:   2012-01-27
+libavformat:   2013-03-xx
 libavresample: 2012-10-05
 libpostproc:   2011-04-18
 libswresample: 2011-09-19
@@ -144,6 +144,40 @@ API changes, most recent first:
 2012-03-26 - a67d9cf - lavfi 2.66.100
   Add avfilter_fill_frame_from_{audio_,}buffer_ref() functions.
 
+2013-03-xx - Reference counted buffers - lavu 52.8.0, lavc 55.0.0, lavf 55.0.0,
+lavd 54.0.0, lavfi 3.5.0
+  xxxxxxx, xxxxxxx - add a new API for reference counted buffers and buffer
+                     pools (new header libavutil/buffer.h).
+  xxxxxxx - add AVPacket.buf to allow reference counting for the AVPacket data.
+            Add av_packet_from_data() function for constructing packets from
+            av_malloc()ed data.
+  xxxxxxx - move AVFrame from lavc to lavu (new header libavutil/frame.h), add
+            AVFrame.buf/extended_buf to allow reference counting for the AVFrame
+            data. Add new API for working with reference-counted AVFrames.
+  xxxxxxx - add the refcounted_frames field to AVCodecContext to make audio and
+            video decoders return reference-counted frames. Add get_buffer2()
+            callback to AVCodecContext which allocates reference-counted frames.
+            Add avcodec_default_get_buffer2() as the default get_buffer2()
+            implementation.
+            Deprecate AVCodecContext.get_buffer() / release_buffer() /
+            reget_buffer(), avcodec_default_get_buffer(),
+            avcodec_default_reget_buffer(), avcodec_default_release_buffer().
+            Remove avcodec_default_free_buffers(), which should not have ever
+            been called from outside of lavc.
+            Deprecate the following AVFrame fields:
+                * base -- is now stored in AVBufferRef
+                * reference, type, buffer_hints -- are unnecessary in the new API
+                * hwaccel_picture_private, owner, thread_opaque -- should not
+                  have been acessed from outside of lavc
+                * qscale_table, qstride, qscale_type, mbskip_table, motion_val,
+                  mb_type, dct_coeff, ref_index -- mpegvideo-specific tables,
+                  which are not exported anymore.
+  xxxxxxx - switch libavfilter to use AVFrame instead of AVFilterBufferRef. Add
+            av_buffersrc_add_frame(), deprecate av_buffersrc_buffer().
+            Add av_buffersink_get_frame() and av_buffersink_get_samples(),
+            deprecate av_buffersink_read() and av_buffersink_read_samples().
+            Deprecate AVFilterBufferRef and all functions for working with it.
+
 2013-xx-xx - xxxxxxx - lavu 52.8.0 - avstring.h
   Add av_isdigit, av_isgraph, av_isspace, av_isxdigit.
 
diff --git a/libavcodec/version.h b/libavcodec/version.h
index 50a203bfd5..3e01b47dc8 100644
--- a/libavcodec/version.h
+++ b/libavcodec/version.h
@@ -28,8 +28,8 @@
 
 #include "libavutil/avutil.h"
 
-#define LIBAVCODEC_VERSION_MAJOR 54
-#define LIBAVCODEC_VERSION_MINOR 92
+#define LIBAVCODEC_VERSION_MAJOR 55
+#define LIBAVCODEC_VERSION_MINOR  0
 #define LIBAVCODEC_VERSION_MICRO 100
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
diff --git a/libavdevice/version.h b/libavdevice/version.h
index 9e0c0ae940..9f2577abaf 100644
--- a/libavdevice/version.h
+++ b/libavdevice/version.h
@@ -28,8 +28,8 @@
 #include "libavutil/avutil.h"
 
 #define LIBAVDEVICE_VERSION_MAJOR  54
-#define LIBAVDEVICE_VERSION_MINOR   3
-#define LIBAVDEVICE_VERSION_MICRO 103
+#define LIBAVDEVICE_VERSION_MINOR   4
+#define LIBAVDEVICE_VERSION_MICRO 100
 
 #define LIBAVDEVICE_VERSION_INT AV_VERSION_INT(LIBAVDEVICE_VERSION_MAJOR, \
                                                LIBAVDEVICE_VERSION_MINOR, \
diff --git a/libavfilter/version.h b/libavfilter/version.h
index 042257d4c8..18f584fc2e 100644
--- a/libavfilter/version.h
+++ b/libavfilter/version.h
@@ -29,8 +29,8 @@
 #include "libavutil/avutil.h"
 
 #define LIBAVFILTER_VERSION_MAJOR  3
-#define LIBAVFILTER_VERSION_MINOR  44
-#define LIBAVFILTER_VERSION_MICRO 101
+#define LIBAVFILTER_VERSION_MINOR  45
+#define LIBAVFILTER_VERSION_MICRO 100
 
 #define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \
                                                LIBAVFILTER_VERSION_MINOR, \
diff --git a/libavformat/version.h b/libavformat/version.h
index 672b9003bf..6cf5850de8 100644
--- a/libavformat/version.h
+++ b/libavformat/version.h
@@ -29,9 +29,9 @@
 
 #include "libavutil/avutil.h"
 
-#define LIBAVFORMAT_VERSION_MAJOR 54
-#define LIBAVFORMAT_VERSION_MINOR 63
-#define LIBAVFORMAT_VERSION_MICRO 104
+#define LIBAVFORMAT_VERSION_MAJOR 55
+#define LIBAVFORMAT_VERSION_MINOR  0
+#define LIBAVFORMAT_VERSION_MICRO 100
 
 #define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
                                                LIBAVFORMAT_VERSION_MINOR, \
@@ -83,7 +83,7 @@
 #define FF_API_AV_GETTIME              (LIBAVFORMAT_VERSION_MAJOR < 55)
 #endif
 #ifndef FF_API_R_FRAME_RATE
-#define FF_API_R_FRAME_RATE            (LIBAVFORMAT_VERSION_MAJOR < 55)
+#define FF_API_R_FRAME_RATE            1
 #endif
 
 #endif /* AVFORMAT_VERSION_H */