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,
+ bound_bottom, padding) to AVSphericalMapping.
+
+2017-03-02 - xxxxxxx - lavc 57.81.104 - videotoolbox.h
+ AVVideotoolboxContext.cv_pix_fmt_type can now be set to 0 to output the
+ native decoder format. (The default value is not changed.)
+
+2017-03-02 - xxxxxxx - lavu 55.47.101, lavc 57.81.102, lavf 57.66.103
+ Remove requirement to use AVOption or accessors to access certain fields
+ in AVFrame, AVCodecContext, and AVFormatContext that were previously
+ documented as "no direct access" allowed.
+
+2017-02-13 - xxxxxxx - lavc 57.80.100 - avcodec.h
+ Add AVCodecContext.hw_device_ctx.
+
+2017-02-11 - xxxxxxx - lavu 55.47.100 - frame.h
+ Add AVFrame.opaque_ref.
+
+2017-01-31 - xxxxxxx - lavu 55.46.100 / 55.20.0 - cpu.h
+ Add AV_CPU_FLAG_SSSE3SLOW.
+
+2017-01-24 - xxxxxxx - lavu 55.45.100 - channel_layout.h
+ Add av_get_extended_channel_layout()
+
+2017-01-22 - xxxxxxx - lavu 55.44.100 - lfg.h
+ Add av_lfg_init_from_data().
+
+2017-01-xx - xxxxxxx - lavc 57.74.100 - vaapi.h
+ Deprecate struct vaapi_context and the vaapi.h installed header.
+ Callers should set AVCodecContext.hw_frames_ctx instead.
+
+2017-01-12 - xxxxxxx - lavfi 6.69.100- buffersink.h
+ Add av_buffersink_get_*() functions.
+
+2017-01-06 - xxxxxxx - lavf 57.62.100- avio.h
+ Add avio_get_dyn_buf()
+
+2016-12-10 - xxxxxxx - lavu xx.xx.100- imgutils.h
+ Add av_image_check_size2()
+
+2016-xx-xx - xxxxxxx - lavc 57.67.100 / 57.29.0 - avcodec.h
+ Add AV_PKT_DATA_SPHERICAL packet side data to export AVSphericalMapping
+ information from containers.
+
+2016-xx-xx - xxxxxxx - lavu 55.42.100 / 55.30.0 - spherical.h
+ Add AV_FRAME_DATA_SPHERICAL value, av_spherical_alloc() API and
+ AVSphericalMapping type to export and describe spherical video properties.
+
+2016-11-18 - xxxxxxx - lavf 57.58.100 - avformat.h
+ Add av_stream_add_side_data().
+
2016-xx-xx - xxxxxxx - lavu 55.39.100 - hwcontext_vaapi.h
Add AV_VAAPI_DRIVER_QUIRK_ATTRIB_MEMTYPE.