API changes, most recent first:
+2017-03-18 - xxxxxxx - lavfi 6.77.100 - avfilter.h
+ Deprecate AVFilterGraph.resample_lavr_opts
+ It's never been used by avfilter nor passed to anything.
+
2017-02-10 - xxxxxxx - lavu 55.48.100 / 55.33.0 - spherical.h
Add AV_SPHERICAL_EQUIRECTANGULAR_TILE, av_spherical_tile_bounds(),
and projection-specific properties (bound_left, bound_top, bound_right,