API changes, most recent first:
+2010-01-03 - r21007 - lavfi 1.13.0 - avfilter_add_colorspace()
+ Add avfilter_add_colorspace().
+
+2010-01-02 - r20998 - lavf 52.46.0 - av_match_ext()
+ Add av_match_ext(), it should be used in place of match_ext().
+
+2010-01-01 - r20991 - lavf 52.45.0 - av_guess_format()
+ Add av_guess_format(), it should be used in place of guess_format().
+
2009-12-13 - r20834 - lavf 52.43.0 - metadata API
- add av_metadata_set2(), AV_METADATA_DONT_STRDUP_KEY and AV_METADATA_DONT_STRDUP_VAL
+ Add av_metadata_set2(), AV_METADATA_DONT_STRDUP_KEY and AV_METADATA_DONT_STRDUP_VAL.
2009-12-13 - r20829 - lavu 50.7.0 - avstring.h API
- add av_d2str()
+ Add av_d2str().
2009-12-13 - r20826 - lavc 52.42.0 - AVStream
- add avg_frame_rate
+ Add avg_frame_rate.
2009-12-12 - r20808 - lavu 50.6.0 - av_bmg_next()
Introduce the av_bmg_next() function.