API changes, most recent first:
+2020-12-03 - xxxxxxxxxx - lavu 56.62.100 - timecode.h
+ Add av_timecode_init_from_components.
+
+2020-xx-xx - xxxxxxxxxx - lavc 58.114.100 - avcodec.h
+ Deprecate AVCodecContext.thread_safe_callbacks. Starting with
+ LIBAVCODEC_VERSION_MAJOR=60, user callbacks must always be
+ thread-safe when frame threading is used.
+
+2020-11-25 - xxxxxxxxxx - lavc 58.113.100 - avcodec.h
+ Adds a new flag AV_CODEC_EXPORT_DATA_FILM_GRAIN for export_side_data.
+
+2020-11-25 - xxxxxxxxxx - lavu 56.61.100 - film_grain_params.h
+ Adds a new API for extracting codec film grain parameters as side data.
+ Adds a new AVFrameSideDataType entry AV_FRAME_DATA_FILM_GRAIN_PARAMS for it.
+
2020-xx-xx - xxxxxxxxxx - lavf 58.64.100 - avformat.h
Add AVSTREAM_EVENT_FLAG_NEW_PACKETS.