API changes, most recent first:
+2021-03-10 - xxxxxxxxxx - lavu 56.68.100 - buffer.h
+ Change AVBufferRef related function and struct size parameter and fields
+ type to size_t at next major bump.
+
+2021-03-04 - xxxxxxxxxx - lavc 58.128.101 - avcodec.h
+ Enable err_recognition to be set for encoders.
+
+2021-03-03 - xxxxxxxxxx - lavf 58.70.100 - avformat.h
+ Deprecate AVFMT_FLAG_PRIV_OPT. It will do nothing
+ as soon as av_demuxer_open() is removed.
+
+2021-02-27 - xxxxxxxxxx - lavc 58.126.100 - avcodec.h
+ Deprecated avcodec_get_frame_class().
+
+2021-02-21 - xxxxxxxxxx - lavu 56.66.100 - tx.h
+ Add enum AVTXFlags and AVTXFlags.AV_TX_INPLACE
+
2021-02-14 - xxxxxxxxxx - lavd 58.12.100 - avdevice.h
Deprecated avdevice_capabilities_create() and
avdevice_capabilities_free().