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