API changes, most recent first:
+2012-07-31 - xxxxxxx - lavc 54.46.100
+ Add channels field to AVFrame.
+
+2012-07-30 - xxxxxxx - lavu 51.66.100
+ Add av_get_channel_description()
+ and av_get_standard_channel_layout() functions.
+
2012-07-20 - xxxxxxx - lavc 54.43.100
Add decode_error_flags field to AVFrame.
2012-03-26 - a67d9cf - lavfi 2.66.100
Add avfilter_fill_frame_from_{audio_,}buffer_ref() functions.
+2012-08-xx - xxxxxxx - lavc 54.25 - avcodec.h
+ Rename CodecID to AVCodecID and all CODEC_ID_* to AV_CODEC_ID_*.
+
+2012-08-03 - xxxxxxx - lavu 51.37.1 - cpu.h
+ lsws 2.1.1 - swscale.h
+ Rename AV_CPU_FLAG_MMX2 ---> AV_CPU_FLAG_MMXEXT.
+ Rename SWS_CPU_CAPS_MMX2 ---> SWS_CPU_CAPS_MMXEXT.
+
+2012-07-xx - xxxxxxx - lavf 54.13.0 - avformat.h
+ Add AVFMT_FLAG_NOBUFFER for low latency use cases.
+
2012-07-10 - 5fade8a - lavu 51.37.0
Add av_malloc_array() and av_mallocz_array()