API changes, most recent first:
+2018-02-xx - xxxxxxx - lavfi 7.12.100 - avfilter.h
+ Add AVFilterContext.extra_hw_frames.
+
+2018-02-xx - xxxxxxx - lavc 58.11.100 - avcodec.h
+ Add AVCodecContext.extra_hw_frames.
+
+2018-02-06 - 0fd475704e - lavd 58.1.100 - avdevice.h
+ Deprecate use of av_input_audio_device_next(), av_input_video_device_next(),
+ av_output_audio_device_next(), av_output_video_device_next().
+ Add av_indev_iterate(), and av_outdev_iterate().
+
+2018-xx-xx - xxxxxxx - lavf 58.9.100 - avformat.h
+ Deprecate use of av_register_input_format(), av_register_output_format(),
+ av_register_all(), av_iformat_next(), av_oformat_next().
+ Add av_demuxer_iterate(), and av_muxer_iterate().
+
+2018-xx-xx - xxxxxxx - lavc 58.10.100 - avcodec.h
+ Deprecate use of avcodec_register(), avcodec_register_all(),
+ av_codec_next(), av_register_codec_parser(), and av_parser_next().
+ Add av_codec_iterate() and av_parser_iterate().
+
+2018-02-xx - xxxxxxx - lavf 58.8.100 - avformat.h
+ Deprecate the current names of the RTSP "timeout", "stimeout", "user-agent"
+ options. Introduce "listen_timeout" as replacement for the current "timeout"
+ option, and "user_agent" as replacement for "user-agent". Once the deprecation
+ is over, the old "timeout" option will be removed, and "stimeout" will be
+ renamed to "stimeout" (the "timeout" option will essentially change semantics).
+
+2018-01-xx - xxxxxxx - lavf 58.7.100 - avformat.h
+ Deprecate AVFormatContext filename field which had limited length, use the
+ new dynamically allocated url field instead.
+
+2018-01-xx - xxxxxxx - lavf 58.7.100 - avformat.h
+ Add url field to AVFormatContext and add ff_format_set_url helper function.
+
+2018-01-xx - xxxxxxx - lavf 58.6.100 - avformat.h
+ Add AVFMTCTX_UNSEEKABLE (for HLS demuxer).
+
+2018-xx-xx - xxxxxxx - lavu 56.9.100 - aes_ctr.h
+ Add method to set the 16-byte IV.
+
+2018-01-xx - xxxxxxx - lavf 58.5.100 - avformat.h
+ Explicitly make avformat_network_init() and avformat_network_deinit() optional.
+ If these are not called, network initialization and deinitialization is
+ automatic, and unlike in older versions, fully supported, unless libavformat
+ is linked to ancient GnuTLS and OpenSSL.
+
+2018-01-xx - xxxxxxx - lavf 58.4.100 - avformat.h
+ Deprecate AVStream.recommended_encoder_configuration. It was useful only for
+ FFserver, which has been removed.
+
+2018-01-xx - xxxxxxx - lavfi 7.11.101 - avfilter.h
+ Deprecate avfilter_link_get_channels(). Use av_buffersink_get_channels().
+
+2017-xx-xx - xxxxxxx - lavr 4.0.0 - avresample.h
+ Deprecate the entire library. Merged years ago to provide compatibility
+ with Libav, it remained unmaintained by the FFmpeg project and duplicated
+ functionality provided by libswresample.
+
+ In order to improve consistency and reduce attack surface, it has been deprecated.
+ Users of this library are asked to migrate to libswresample, which, as well as
+ providing more functionality, is faster and has higher accuracy.
+
+2017-xx-xx - xxxxxxx - lavc 58.9.100 - avcodec.h
+ Deprecate av_lockmgr_register(). You need to build FFmpeg with threading
+ support enabled to get basic thread-safety (which is the default build
+ configuration).
+
+2017-12-xx - xxxxxxx - lavu 56.7.100 - cpu.h
+ AVX-512 flags added.
+
+2017-xx-xx - xxxxxxx - lavc 58.8.100 - avcodec.h
+ The MediaCodec decoders now support AVCodecContext.hw_device_ctx.
+
+2017-xx-xx - xxxxxxx - lavu 56.6.100 - hwcontext.h hwcontext_mediacodec.h
+ Add AV_HWDEVICE_TYPE_MEDIACODEC and a new installed header with
+ MediaCodec-specific hwcontext definitions.
+
+2017-xx-xx - xxxxxxc - lavc 58.7.100 - avcodec.h
+ Add AV_CODEC_CAP_HARDWARE, AV_CODEC_CAP_HYBRID, and AVCodec.wrapper_name,
+ and mark all AVCodecs accordingly.
+
+2017-xx-xx - xxxxxxx - lavu 56.4.100 / 56.7.0 - stereo3d.h
+ Add view field to AVStereo3D structure and AVStereo3DView enum.
+
2017-xx-xx - xxxxxxx - lavc 58.6.100 - avcodec.h
Add const to AVCodecContext.hwaccel.
2017-11-xx - xxxxxxx - lavc 58.4.100 - avcodec.h
Add AVCodecHWConfig and avcodec_get_hw_config().
-2017-11-22 - 3650cb2dfa - lavu 55.3.100 - opencl.h
+2017-11-22 - 3650cb2dfa - lavu 56.3.100 - opencl.h
Remove experimental OpenCL API (av_opencl_*).
-2017-11-22 - b25d8ef0a7 - lavu 55.2.100 - hwcontext.h hwcontext_opencl.h
+2017-11-22 - b25d8ef0a7 - lavu 56.2.100 - hwcontext.h hwcontext_opencl.h
Add AV_HWDEVICE_TYPE_OPENCL and a new installed header with
OpenCL-specific hwcontext definitions.
-2017-11-22 - a050f56c09 - lavu 55.1.100 - pixfmt.h
+2017-11-22 - a050f56c09 - lavu 56.1.100 - pixfmt.h
Add AV_PIX_FMT_OPENCL.
2017-11-11 - 48e4eda11d - lavc 58.3.100 - avcodec.h