API changes, most recent first:
+2021-03-xx - xxxxxxxxxx - lavc 58.133.100 - codec.h
+ Deprecated av_init_packet(). Once removed, sizeof(AVPacket) will
+ no longer be a part of the public ABI.
+ Deprecated AVPacketList.
+
2021-03-xx - xxxxxxxxxx - lavc 58.132.100 - codec.h
Add AV_CODEC_CAP_OTHER_THREADS as a new name for
AV_CODEC_CAP_AUTO_THREADS. AV_CODEC_CAP_AUTO_THREADS