API changes, most recent first:
-2019-01-27 - XXXXXXXXXX - lavc 58.46.100 - avcodec.h
+2020-ww-xx - xxxxxxxxxx - lavu yy.yy.yyy - hwcontext.h
+ Add AV_PIX_FMT_VULKAN
+ Add AV_HWDEVICE_TYPE_VULKAN and implementation.
+
+2020-01-30 - xxxxxxxxxx - lavf 58.37.100 - avio.h
+ Add avio_protocol_get_class().
+
+2020-01-15 - xxxxxxxxxx - lavc 58.66.100 - avcodec.h
+ Add AV_PKT_DATA_PRFT and AVProducerReferenceTime.
+
+2019-12-27 - xxxxxxxxxx - lavu 56.38.100 - eval.h
+ Add av_expr_count_func().
+
+2019-12-xx - xxxxxxxxxx - lavu 56.37.100 - buffer.h
+ Add av_buffer_pool_buffer_get_opaque().
+
+2019-11-17 - 1c23abc88f - lavu 56.36.100 - eval API
+ Add av_expr_count_vars().
+
+2019-10-14 - f3746d31f9 - lavu 56.35.101 - opt.h
+ Add AV_OPT_FLAG_RUNTIME_PARAM.
+
+2019-09-25 - xxxxxxxxxx - lavc 58.59.100 - avcodec.h
+ Add max_samples
+
+2019-09-04 - 2a9d461abc - lavu 56.35.100 - hwcontext_videotoolbox.h
+ Add av_map_videotoolbox_format_from_pixfmt2() for full range pixfmt
+
+2019-09-01 - xxxxxxxxxx - lavu 56.34.100 - pixfmt.h
+ Add EBU Tech. 3213-E AVColorPrimaries value
+
+2019-08-xx - xxxxxxxxxx - lavf 58.31.101 - avio.h
+ 4K limit removed from avio_printf.
+
+2019-08-xx - xxxxxxxxxx - lavf 58.31.100 - avio.h
+ Add avio_print_string_array and avio_print.
+
+2019-07-27 - xxxxxxxxxx - lavu 56.33.100 - tx.h
+ Add AV_TX_DOUBLE_FFT and AV_TX_DOUBLE_MDCT
+
+-------- 8< --------- FFmpeg 4.2 was cut here -------- 8< ---------
+
+2019-06-21 - a30e44098a - lavu 56.30.100 - frame.h
+ Add FF_DECODE_ERROR_DECODE_SLICES
+
+2019-06-14 - edfced8c04 - lavu 56.29.100 - frame.h
+ Add FF_DECODE_ERROR_CONCEALMENT_ACTIVE
+
+2019-05-15 - b79b29ddb1 - lavu 56.28.100 - tx.h
+ Add av_tx_init(), av_tx_uninit() and related definitions.
+
+2019-04-20 - 3153a6502a - lavc 58.52.100 - avcodec.h
+ Add AV_CODEC_FLAG_DROPCHANGED to allow avcodec_receive_frame to drop
+ frames whose parameters differ from first decoded frame in stream.
+
+2019-04-12 - abfeba9724 - lavf 58.27.102
+ Rename hls,applehttp demuxer to hls
+
+2019-01-27 - 5bcefceec8 - lavc 58.46.100 - avcodec.h
Add discard_damaged_percentage
-2019-01-08 - xxxxxxxxxx - lavu 56.26.100 - frame.h
+2019-01-08 - 1ef4828276 - lavu 56.26.100 - frame.h
Add AV_FRAME_DATA_REGIONS_OF_INTEREST
2018-12-21 - 2744d6b364 - lavu 56.25.100 - hdr_dynamic_metadata.h