diff ffmpeg/doc/APIchanges @ 10:6840f77b83aa

commit

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ffmpeg/doc/APIchanges	Sun Apr 21 10:55:35 2013 +0200
@@ -0,0 +1,1626 @@
+Never assume the API of libav* to be stable unless at least 1 month has passed
+since the last major version increase or the API was added.
+
+The last version increases were:
+libavcodec:    2013-03-xx
+libavdevice:   2013-03-xx
+libavfilter:   2012-06-22
+libavformat:   2013-03-xx
+libavresample: 2012-10-05
+libpostproc:   2011-04-18
+libswresample: 2011-09-19
+libswscale:    2011-06-20
+libavutil:     2012-10-22
+
+
+API changes, most recent first:
+
[phone] - xxxxxxx - lavc 55.4.100
+  Add AV_CODEC_PROP_TEXT_SUB property for text based subtitles codec.
+
[phone] - xxxxxxx - lavf 55.3.100
+  The matroska demuxer can now output proper verbatim ASS packets. It will
+  become the default starting lavf 56.0.100.
+
[phone] - xxxxxxx - lavu 25.26.100 - avutil.h,opt.h
+  Add av_int_list_length()
+  and av_opt_set_int_list().
+
[phone] - xxxxxxx - lavu 52.24.100 - samplefmt.h
+  Add av_samples_alloc_array_and_samples().
+
[phone] - xxxxxxx - lavf 55.1.100 - avformat.h
+  Add av_guess_frame_rate()
+
[phone] - xxxxxxx - lavu 52.22.100 - opt.h
+  Add AV_OPT_TYPE_DURATION value to AVOptionType enum.
+
[phone] - xxxxxx - lavu 52.20.100 - opt.h
+  Add AV_OPT_TYPE_VIDEO_RATE value to AVOptionType enum.
+
[phone] - xxxxxx - lavu 52.18.100 - avstring.h,bprint.h
+  Add av_escape() and av_bprint_escape() API.
+
[phone] - xxxxxx - lavfi 3.41.100 - buffersink.h
+  Add sample_rates field to AVABufferSinkParams.
+
[phone] - a1a707f - lavf 54.61.100
+  Add av_codec_get_tag2().
+
[phone] - 2eb2e17 - lavfi 3.34.100
+  Add avfilter_get_audio_buffer_ref_from_arrays_channels.
+
[phone] - 34de47aa - lavfi 3.29.100 - avfilter.h
+  Add AVFilterLink.channels, avfilter_link_get_channels()
+  and avfilter_ref_get_channels().
+
[phone] - 2ada584d - lavc 54.80.100 - avcodec.h
+  Add pkt_size field to AVFrame.
+
[phone] - c70ec631 - lavu 52.9.100 - opt.h
+  Add the following convenience functions to opt.h:
+   av_opt_get_image_size
+   av_opt_get_pixel_fmt
+   av_opt_get_sample_fmt
+   av_opt_set_image_size
+   av_opt_set_pixel_fmt
+   av_opt_set_sample_fmt
+
[phone] - 4cd74c81 - lavu 52.8.100 - bprint.h
+  Add av_bprint_strftime().
+
[phone] - 92648107 - lavu 52.7.100 - opt.h
+  Add av_opt_get_key_value().
+
[phone] - 79456652 - lavfi 3.23.100 - avfilter.h
+  Add channels field to AVFilterBufferRefAudioProps.
+
[phone] - 481fdeee - lavu 52.3.100 - opt.h
+  Add AV_OPT_TYPE_SAMPLE_FMT value to AVOptionType enum.
+
[phone] - 6fb2fd8 - lavc  54.68.100 - avcodec.h
+                       lavfi  3.20.100 - avfilter.h
+  Add AV_PKT_DATA_STRINGS_METADATA side data type, used to transmit key/value
+  strings between AVPacket and AVFrame, and add metadata field to
+  AVCodecContext (which shall not be accessed by users; see AVFrame metadata
+  instead).
+
[phone] - a70b493 - lavd 54.3.100 - version.h
+  Add LIBAVDEVICE_IDENT symbol.
+
[phone] - a70b493 - lavfi 3.18.100 - version.h
+  Add LIBAVFILTER_IDENT symbol.
+
[phone] - a70b493 - libswr 0.16.100 - version.h
+  Add LIBSWRESAMPLE_VERSION, LIBSWRESAMPLE_BUILD
+  and LIBSWRESAMPLE_IDENT symbols.
+
[phone] - 29e972f - lavu 51.72.100 - parseutils.h
+  Add av_small_strptime() time parsing function.
+
+  Can be used as a stripped-down replacement for strptime(), on
+  systems which do not support it.
+
[phone] - 2626cc4 - lavf 54.28.100
+  Matroska demuxer now identifies SRT subtitles as AV_CODEC_ID_SUBRIP instead
+  of AV_CODEC_ID_TEXT.
+
[phone] - 5c0d8bc - lavfi 3.8.100 - avfilter.h
+  Add avfilter_get_class() function, and priv_class field to AVFilter
+  struct.
+
[phone] - a25346e - lavu 51.69.100 - opt.h
+  Add AV_OPT_FLAG_FILTERING_PARAM symbol in opt.h.
+
[phone] - 23fc4dd - lavc 54.46.100
+  Add channels field to AVFrame.
+
[phone] - f893904 - lavu 51.66.100
+  Add av_get_channel_description()
+  and av_get_standard_channel_layout() functions.
+
[phone] - 016a472 - lavc 54.43.100
+  Add decode_error_flags field to AVFrame.
+
[phone] - b062936 - lavf 54.18.100
+  Add avformat_match_stream_specifier() function.
+
[phone] - f49ec1b - lavc 54.38.100 - avcodec.h
+  Add metadata to AVFrame, and the accessor functions
+  av_frame_get_metadata() and av_frame_set_metadata().
+
[phone] - 0e003d8 - lavc 54.33.100
+  Add av_fast_padded_mallocz().
+
[phone] - 21d5609 - lavfi 3.2.0 - avfilter.h
+  Add init_opaque() callback to AVFilter struct.
+
[phone] - e6674e4 - lavu 51.63.100 - imgutils.h
+  Add functions to libavutil/imgutils.h:
+  av_image_get_buffer_size()
+  av_image_fill_arrays()
+  av_image_copy_to_buffer()
+
[phone] - c41899a - lavu 51.62.100 - version.h
+  version moved from avutil.h to version.h
+
[phone] - 359abb1 - lavu 51.58.100 - error.h
+  Add av_make_error_string() and av_err2str() utilities to
+  libavutil/error.h.
+
[phone] - 62b39d4 - lavc 54.24.100
+  Add pkt_duration field to AVFrame.
+
[phone] - f2ee065 - lavu 51.54.100
+  Move AVPALETTE_SIZE and AVPALETTE_COUNT macros from
+  libavcodec/avcodec.h to libavutil/pixfmt.h.
+
[phone] - 94a9ac1 - lavf 54.5.100
+  Add av_guess_sample_aspect_ratio() function.
+
[phone] - 65fa7bc - lavfi 2.70.100
+  Add avfilter_unref_bufferp() to avfilter.h.
+
[phone] - 162e400 - lavfi 2.68.100
+  Install libavfilter/asrc_abuffer.h public header.
+
[phone] - a67d9cf - lavfi 2.66.100
+  Add avfilter_fill_frame_from_{audio_,}buffer_ref() functions.
+
+2013-03-xx - xxxxxxx - lavc 55.2.0 - avcodec.h
+  Add CODEC_FLAG_UNALIGNED to allow decoders to produce unaligned output.
+
+2013-xx-xx - lavfi 3.8.0
+  Move all content from avfiltergraph.h to avfilter.h. Deprecate
+  avfilterhraph.h, user applications should include just avfilter.h
+  Add avfilter_graph_alloc_filter(), deprecate avfilter_open() and
+  avfilter_graph_add_filter().
+  Add AVFilterContext.graph pointing to the AVFilterGraph that contains the
+  filter.
+  Add avfilter_init_str(), deprecate avfilter_init_filter().
+  Add avfilter_init_dict().
+  Add AVFilter.flags field and AVFILTER_FLAG_DYNAMIC_{INPUTS,OUTPUTS} flags.
+  Add avfilter_pad_count() for counting filter inputs/outputs.
+  Add avfilter_next(), deprecate av_filter_next().
+  Deprecate avfilter_uninit().
+
+2013-xx-xx - lavfi 3.7.0 - avfilter.h
+  Add AVFilter.priv_class for exporting filter options through the AVOptions API
+  in the similar way private options work in lavc and lavf.
+  Add avfilter_get_class().
+  Switch all filters to use AVOptions.
+
+2013-xx-xx - lavu 52.9.0 - pixdesc.h
+  Add av_pix_fmt_count_planes() function for counting planes in a pixel format.
+
+2013-xx-xx - lavfi 3.6.0
+  Add AVFilterGraph.nb_filters, deprecate AVFilterGraph.filter_count.
+
+2013-03-xx - Reference counted buffers - lavu 52.8.0, lavc 55.0.0, lavf 55.0.0,
+lavd 54.0.0, lavfi 3.5.0
+  xxxxxxx, xxxxxxx - add a new API for reference counted buffers and buffer
+                     pools (new header libavutil/buffer.h).
+  xxxxxxx - add AVPacket.buf to allow reference counting for the AVPacket data.
+            Add av_packet_from_data() function for constructing packets from
+            av_malloc()ed data.
+  xxxxxxx - move AVFrame from lavc to lavu (new header libavutil/frame.h), add
+            AVFrame.buf/extended_buf to allow reference counting for the AVFrame
+            data. Add new API for working with reference-counted AVFrames.
+  xxxxxxx - add the refcounted_frames field to AVCodecContext to make audio and
+            video decoders return reference-counted frames. Add get_buffer2()
+            callback to AVCodecContext which allocates reference-counted frames.
+            Add avcodec_default_get_buffer2() as the default get_buffer2()
+            implementation.
+            Deprecate AVCodecContext.get_buffer() / release_buffer() /
+            reget_buffer(), avcodec_default_get_buffer(),
+            avcodec_default_reget_buffer(), avcodec_default_release_buffer().
+            Remove avcodec_default_free_buffers(), which should not have ever
+            been called from outside of lavc.
+            Deprecate the following AVFrame fields:
+                * base -- is now stored in AVBufferRef
+                * reference, type, buffer_hints -- are unnecessary in the new API
+                * hwaccel_picture_private, owner, thread_opaque -- should not
+                  have been acessed from outside of lavc
+                * qscale_table, qstride, qscale_type, mbskip_table, motion_val,
+                  mb_type, dct_coeff, ref_index -- mpegvideo-specific tables,
+                  which are not exported anymore.
+  xxxxxxx - switch libavfilter to use AVFrame instead of AVFilterBufferRef. Add
+            av_buffersrc_add_frame(), deprecate av_buffersrc_buffer().
+            Add av_buffersink_get_frame() and av_buffersink_get_samples(),
+            deprecate av_buffersink_read() and av_buffersink_read_samples().
+            Deprecate AVFilterBufferRef and all functions for working with it.
+
+2013-xx-xx - xxxxxxx - lavu 52.8.0 - avstring.h
+  Add av_isdigit, av_isgraph, av_isspace, av_isxdigit.
+
+2013-xx-xx - xxxxxxx - lavfi 3.4.0 - avfiltergraph.h
+  Add resample_lavr_opts to AVFilterGraph for setting libavresample options
+  for auto-inserted resample filters.
+
+2013-xx-xx - xxxxxxx - lavu 52.7.0 - dict.h
+  Add av_dict_parse_string() to set multiple key/value pairs at once from a
+  string.
+
+2013-01-xx - xxxxxxx - lavu 52.6.0 - avstring.h
+  Add av_strnstr()
+
+2013-01-xx - xxxxxxx - lavu 52.5.0 - hmac.h
+  Add AVHMAC.
+
[phone] - xxxxxxx - lavc 54.87.100 / 54.36.0 - vdpau.h
+  Add AVVDPAUContext struct for VDPAU hardware-accelerated decoding.
+
[phone] - dae382b / 169fb94 - lavu 52.14.100 / 52.4.0 - pixdesc.h
+  Add AV_PIX_FMT_VDPAU flag.
+
[phone] - 249fca3 / 074a00d - lavr 1.1.0
+  Add avresample_set_channel_mapping() for input channel reordering,
+  duplication, and silencing.
+
[phone] - 2ce43b3 / d8fd06c - lavu 52.13.100 / 52.3.0 - avstring.h
+  Add av_basename() and av_dirname().
+
[phone] - 03b0787 / 5980f5d - lavu 52.6.100 / 52.2.0 - audioconvert.h
+  Rename audioconvert.h to channel_layout.h. audioconvert.h is now deprecated.
+
[phone] - 7d26be6 / dfde8a3 - lavu 52.5.100 / 52.1.0 - intmath.h
+  Add av_ctz() for trailing zero bit count
+
[phone] - e3a91c5 / a893655 - lavu 51.77.100 / 51.45.0 - error.h
+  Add AVERROR_EXPERIMENTAL
+
[phone] - a33ed6b / d2fcb35 - lavu 51.76.100 / 51.44.0 - pixdesc.h
+  Add functions for accessing pixel format descriptors.
+  Accessing the av_pix_fmt_descriptors array directly is now
+  deprecated.
+
[phone] - f391e40 / 9a92aea - lavu 51.75.100 / 51.43.0 - aes.h, md5.h, sha.h, tree.h
+  Add functions for allocating the opaque contexts for the algorithms,
+
[phone] - de31814 / b522000 - lavf 54.32.100 / 54.18.0 - avio.h
+  Add avio_closep to complement avio_close.
+
[phone] - ae77266 / 78071a1 - lavu 51.74.100 / 51.42.0 - pixfmt.h
+  Rename PixelFormat to AVPixelFormat and all PIX_FMT_* to AV_PIX_FMT_*.
+  To provide backwards compatibility, PixelFormat is now #defined as
+  AVPixelFormat.
+  Note that this can break user code that includes pixfmt.h and uses the
+  'PixelFormat' identifier. Such code should either #undef PixelFormat
+  or stop using the PixelFormat name.
+
[phone] - 55c49af / e7ba5b1 - lavr 1.0.0 - avresample.h
+  Data planes parameters to avresample_convert() and
+  avresample_read() are now uint8_t** instead of void**.
+  Libavresample is now stable.
+
[phone] - 46a3595 / a42aada - lavc 54.59.100 / 54.28.0 - avcodec.h
+  Add avcodec_free_frame(). This function must now
+  be used for freeing an AVFrame.
+
[phone] - e3e09f2 / 8919fee - lavu 51.73.100 / 51.41.0 - audioconvert.h
+  Added AV_CH_LOW_FREQUENCY_2 channel mask value.
+
[phone] - b21b5b0 / 686a329 - lavu 51.71.100 / 51.40.0 - opt.h
+  Reordered the fields in default_val in AVOption, changed which
+  default_val field is used for which AVOptionType.
+
[phone] - 98298eb / a231832 - lavc 54.54.101 / 54.26.1 - avcodec.h
+  Add codec descriptor properties AV_CODEC_PROP_LOSSY and
+  AV_CODEC_PROP_LOSSLESS.
+
[phone] - lavc 54.26 - avcodec.h
+  Add codec descriptors for accessing codec properties without having
+  to refer to a specific decoder or encoder.
+
+  f5f3684 / c223d79 - Add an AVCodecDescriptor struct and functions
+            avcodec_descriptor_get() and avcodec_descriptor_next().
+  f5f3684 / 51efed1 - Add AVCodecDescriptor.props and AV_CODEC_PROP_INTRA_ONLY.
+  6c180b3 / 91e59fe - Add avcodec_descriptor_get_by_name().
+
[phone] - f5f3684 / 987170c - lavu 51.68.100 / 51.38.0 - dict.h
+  Add av_dict_count().
+
[phone] - 7a72695 / 104e10f - lavc 54.51.100 / 54.25.0 - avcodec.h
+  Rename CodecID to AVCodecID and all CODEC_ID_* to AV_CODEC_ID_*.
+  To provide backwards compatibility, CodecID is now #defined as AVCodecID.
+  Note that this can break user code that includes avcodec.h and uses the
+  'CodecID' identifier. Such code should either #undef CodecID or stop using the
+  CodecID name.
+
[phone] - e776ee8 / 239fdf1 - lavu 51.66.101 / 51.37.1 - cpu.h
+                       lsws 2.1.1   - swscale.h
+  Rename AV_CPU_FLAG_MMX2  ---> AV_CPU_FLAG_MMXEXT.
+  Rename SWS_CPU_CAPS_MMX2 ---> SWS_CPU_CAPS_MMXEXT.
+
[phone] - 7c26761 / 681ed00 - lavf 54.22.100 / 54.13.0 - avformat.h
+  Add AVFMT_FLAG_NOBUFFER for low latency use cases.
+
[phone] - 5fade8a - lavu 51.37.0
+  Add av_malloc_array() and av_mallocz_array()
+
[phone] - e847f41 / d3d3a32 - lavu 51.61.100 / 51.34.0
+  Add av_usleep()
+
[phone] - 4da42eb / ae0a301 - lavu 51.60.100 / 51.33.0
+  Move av_gettime() to libavutil, add libavutil/time.h
+
[phone] - 82edf67 / 3971be0 - lavr 0.0.3
+  Add a parameter to avresample_build_matrix() for Dolby/DPLII downmixing.
+
[phone] - c7b9eab / 9baeff9 - lavfi 2.79.100 / 2.23.0 - avfilter.h
+  Add AVFilterContext.nb_inputs/outputs. Deprecate
+  AVFilterContext.input/output_count.
+
[phone] - c7b9eab / 84b9fbe - lavfi 2.79.100 / 2.22.0 - avfilter.h
+  Add avfilter_pad_get_type() and avfilter_pad_get_name(). Those
+  should now be used instead of accessing AVFilterPad members
+  directly.
+
[phone] - 3630a07 / b0f0dfc - lavu 51.57.100 / 51.32.0 - audioconvert.h
+  Add av_get_channel_layout_channel_index(), av_get_channel_name()
+  and av_channel_layout_extract_channel().
+
[phone] - 53ce990 / 154486f - lavu 51.55.100 / 51.31.0 - opt.h
+  Add av_opt_set_bin()
+
[phone] - lavfi 2.74.100 / 2.17.0
+  Add support for audio filters
+  61930bd / ac71230, 1cbf7fb / a2cd9be - add video/audio buffer sink in a new installed
+                    header buffersink.h
+  1cbf7fb / 720c6b7 - add av_buffersrc_write_frame(), deprecate
+            av_vsrc_buffer_add_frame()
+  61930bd / ab16504 - add avfilter_copy_buf_props()
+  61930bd / 9453c9e - add extended_data to AVFilterBuffer
+  61930bd / 1b8c927 - add avfilter_get_audio_buffer_ref_from_arrays()
+
[phone] - lavu 51.53.100 / 51.30.0 - samplefmt.h
+  61930bd / 142e740 - add av_samples_copy()
+  61930bd / 6d7f617 - add av_samples_set_silence()
+
[phone] - 61930bd / a5117a2 - lavc 54.21.101 / 54.13.1
+  For audio formats with fixed frame size, the last frame
+  no longer needs to be padded with silence, libavcodec
+  will handle this internally (effectively all encoders
+  behave as if they had CODEC_CAP_SMALL_LAST_FRAME set).
+
[phone] - 653d117 / 828bd08 - lavc 54.20.100 / 54.13.0 - avcodec.h
+  Add sample_rate and channel_layout fields to AVFrame.
+
[phone] - 2330eb1 / 4010d72 - lavr 0.0.1
+  Change AV_MIX_COEFF_TYPE_Q6 to AV_MIX_COEFF_TYPE_Q8.
+
[phone] - e890b68 / 3527a73 - lavu 51.48.100 / 51.29.0 - cpu.h
+  Add av_parse_cpu_flags()
+
[phone] - 3ead79e / c8af852 - lavr 0.0.0
+  Add libavresample audio conversion library
+
[phone] - 3194ab7 / 0c0d1bc - lavu 51.47.100 / 51.28.0 - audio_fifo.h
+  Add audio FIFO functions:
+    av_audio_fifo_free()
+    av_audio_fifo_alloc()
+    av_audio_fifo_realloc()
+    av_audio_fifo_write()
+    av_audio_fifo_read()
+    av_audio_fifo_drain()
+    av_audio_fifo_reset()
+    av_audio_fifo_size()
+    av_audio_fifo_space()
+
[phone] - lavfi 2.70.100 / 2.16.0 - avfiltergraph.h
+  7432bcf / d7bcc71 Add avfilter_graph_parse2().
+
[phone] - 6bfb304 / 4d693b0 - lavu 51.46.100 / 51.27.0 - samplefmt.h
+  Add av_get_packed_sample_fmt() and av_get_planar_sample_fmt()
+
[phone] - b75c67d - lavu 51.43.100
+  Add bprint.h for bprint API.
+
[phone] - 9cbf17e - lavc 54.4.100
+  Add av_get_pcm_codec() function.
+
[phone] - 560b224 - libswr 0.7.100
+  Add swr_set_matrix() function.
+
[phone] - c28e7af - lavu 51.39.100
+  Add a new installed header libavutil/timestamp.h with timestamp
+  utilities.
+
[phone] - 70ffda3 - lavu 51.38.100
+  Add av_parse_ratio() function to parseutils.h.
+
[phone] - 70ffda3 - lavu 51.38.100
+  Add AV_LOG_MAX_OFFSET macro to log.h.
+
[phone] - 0eaa123 - lavu 51.37.100
+  Add public timecode helpers.
+
[phone] - 0c3577b - lavfi 2.60.100
+  Add avfilter_graph_dump.
+
[phone] - 0ebd836 / 3c90cc2 - lavfo 54.2.0
+  Deprecate av_read_packet(), use av_read_frame() with
+  AVFMT_FLAG_NOPARSE | AVFMT_FLAG_NOFILLIN in AVFormatContext.flags
+
[phone] - lavc 54.10.100 / 54.8.0
+  f095391 / 6699d07 Add av_get_exact_bits_per_sample()
+  f095391 / 9524cf7 Add av_get_audio_frame_duration()
+
[phone] - 2af8f2c / 44fe77b - lavc 54.8.100 / 54.7.0 - avcodec.h
+  Add av_codec_is_encoder/decoder().
+
[phone] - 1eb7f39 / 442c132 - lavc 54.5.100 / 54.3.0 - avcodec.h
+  Add av_packet_shrink_side_data.
+
[phone] - 79ae084 / dd2a4bc - lavf 54.2.100 / 54.2.0 - avformat.h
+  Add AVStream.attached_pic and AV_DISPOSITION_ATTACHED_PIC,
+  used for dealing with attached pictures/cover art.
+
[phone] - 305e4b3 / c9bca80 - lavu 51.41.100 / 51.24.0 - error.h
+  Add AVERROR_UNKNOWN
+  NOTE: this was backported to 0.8
+
[phone] - eadd426 / e9cda85 - lavc 54.2.100 / 54.2.0
+  Add duration field to AVCodecParserContext
+
[phone] - eadd426 / 0b42a93 - lavu 51.40.100 / 51.23.1 - mathematics.h
+  Add av_rescale_q_rnd()
+
[phone] - f2b20b7 / 38d5533 - lavu 51.38.101 / 51.22.1 - pixdesc.h
+  Add PIX_FMT_PSEUDOPAL flag.
+
[phone] - f2b20b7 / 52f82a1 - lavc 54.2.100 / 54.1.0
+  Add avcodec_encode_video2() and deprecate avcodec_encode_video().
+
[phone] - 4c677df / 316fc74 - lavc 54.1.0
+  Add av_fast_padded_malloc() as alternative for av_realloc() when aligned
+  memory is required. The buffer will always have FF_INPUT_BUFFER_PADDING_SIZE
+  zero-padded bytes at the end.
+
[phone] - a369a6b / dd6d3b0 - lavf 54.1.0
+  Add avformat_get_riff_video_tags() and avformat_get_riff_audio_tags().
+  NOTE: this was backported to 0.8
+
[phone] - a369a6b / af08d9a - lavc 54.1.0
+  Add avcodec_is_open() function.
+  NOTE: this was backported to 0.8
+
[phone] - 151ecc2 / 8b93312 - lavu 51.36.100 / 51.22.0 - intfloat.h
+  Add a new installed header libavutil/intfloat.h with int/float punning
+  functions.
+  NOTE: this was backported to 0.8
+
[phone] - lavf 53.31.100 / 53.22.0
+  3c5fe5b / f1caf01 Allow doing av_write_frame(ctx, NULL) for flushing possible
+          buffered data within a muxer. Added AVFMT_ALLOW_FLUSH for
+          muxers supporting it (av_write_frame makes sure it is called
+          only for muxers with this flag).
+
[phone] - lavc 53.56.105 / 53.34.0
+  New audio encoding API:
+  67f5650 / b2c75b6 Add CODEC_CAP_VARIABLE_FRAME_SIZE capability for use by audio
+          encoders.
+  67f5650 / 5ee5fa0 Add avcodec_fill_audio_frame() as a convenience function.
+  67f5650 / b2c75b6 Add avcodec_encode_audio2() and deprecate avcodec_encode_audio().
+          Add AVCodec.encode2().
+
[phone] - b18e17e / 3167dc9 - lavfi 2.59.100 / 2.15.0
+  Add a new installed header -- libavfilter/version.h -- with version macros.
+
[phone] - a502939 - lavfi 2.52.0
+  Add av_buffersink_poll_frame() to buffersink.h.
+
[phone] - 26c6fec - lavu 51.31.0
+  Add av_log_format_line.
+
[phone] - 976b095 - lavu 51.30.0
+  Add AVERROR_BUG.
+
[phone] - 573ffbb - lavu 51.28.1
+  Add av_get_alt_sample_fmt() to samplefmt.h.
+
[phone] - 96949da - lavu 51.23.0
+  Add av_strcasecmp() and av_strncasecmp() to avstring.h.
+
[phone] - b35e9e1 - lavu 51.22.0
+  Add av_strtok() to avstring.h.
+
[phone] - ad1c8dd / b73ec05 - lavu 51.34.100 / 51.21.0
+  Add av_popcount64
+
[phone] - 7c29313 / 8400b12 - lavc 53.46.1 / 53.28.1
+  Deprecate AVFrame.age. The field is unused.
+
[phone] - 8bc7fe4 / 5266045 - lavf 53.25.0 / 53.17.0
+  Add avformat_close_input().
+  Deprecate av_close_input_file() and av_close_input_stream().
+
[phone] - e4de716 / 0eea212 - lavc 53.40.0 / 53.25.0
+  Add nb_samples and extended_data fields to AVFrame.
+  Deprecate AVCODEC_MAX_AUDIO_FRAME_SIZE.
+  Deprecate avcodec_decode_audio3() in favor of avcodec_decode_audio4().
+  avcodec_decode_audio4() writes output samples to an AVFrame, which allows
+  audio decoders to use get_buffer().
+
[phone] - e4de716 / 560f773 - lavc 53.40.0 / 53.24.0
+  Change AVFrame.data[4]/base[4]/linesize[4]/error[4] to [8] at next major bump.
+  Change AVPicture.data[4]/linesize[4] to [8] at next major bump.
+  Change AVCodecContext.error[4] to [8] at next major bump.
+  Add AV_NUM_DATA_POINTERS to simplify the bump transition.
+
[phone] - 8e576d5 / bbb46f3 - lavu 51.27.0 / 51.18.0
+  Add av_samples_get_buffer_size(), av_samples_fill_arrays(), and
+  av_samples_alloc(), to samplefmt.h.
+
[phone] - 8e576d5 / 8889cc4 - lavu 51.27.0 / 51.17.0
+  Add planar sample formats and av_sample_fmt_is_planar() to samplefmt.h.
+
[phone] - dbb38bc / f3a29b7 - lavc 53.36.0 / 53.21.0
+  Move some AVCodecContext fields to a new private struct, AVCodecInternal,
+  which is accessed from a new field, AVCodecContext.internal.
+  - fields moved:
+      AVCodecContext.internal_buffer       --> AVCodecInternal.buffer
+      AVCodecContext.internal_buffer_count --> AVCodecInternal.buffer_count
+      AVCodecContext.is_copy               --> AVCodecInternal.is_copy
+
[phone] - 8709ba9 / 6270671 - lavu 51.26.0 / 51.16.0
+  Add av_timegm()
+
[phone] - lavf 53.21.0 / 53.15.0
+  New interrupt callback API, allowing per-AVFormatContext/AVIOContext
+  interrupt callbacks.
+  5f268ca / 6aa0b98 Add AVIOInterruptCB struct and the interrupt_callback field to
+          AVFormatContext.
+  5f268ca / 1dee0ac Add avio_open2() with additional parameters. Those are
+          an interrupt callback and an options AVDictionary.
+          This will allow passing AVOptions to protocols after lavf
+          54.0.
+
[phone] - 13b7781 / ba04ecf - lavu 51.24.0 / 51.14.0
+  Add av_strcasecmp() and av_strncasecmp() to avstring.h.
+
[phone] - 13b7781 / 07b172f - lavu 51.24.0 / 51.13.0
+  Add av_toupper()/av_tolower()
+
[phone] - d8cab5c / b6d08f4 - lavf 53.19.0 / 53.13.0
+  Add avformat_network_init()/avformat_network_deinit()
+
[phone] - 6faf0a2 / 512557b - lavc 53.24.0 / 53.15.0
+  Remove avcodec_parse_frame.
+  Deprecate AVCodecContext.parse_only and CODEC_CAP_PARSE_ONLY.
+
[phone] - d049257 / 569129a - lavf 53.17.0 / 53.10.0
+  Add avformat_new_stream(). Deprecate av_new_stream().
+
[phone] - 91eb1b1 / b631fba - lavf 53.16.0 / 53.9.0
+  Add AVFMT_NO_BYTE_SEEK AVInputFormat flag.
+
[phone] - lavu 51.21.0 / 51.12.0
+  AVOptions API rewrite.
+
+  - f884ef0 / 145f741 FF_OPT_TYPE* renamed to AV_OPT_TYPE_*
+  - new setting/getting functions with slightly different semantics:
+        f884ef0 / dac66da av_set_string3 -> av_opt_set
+                av_set_double  -> av_opt_set_double
+                av_set_q       -> av_opt_set_q
+                av_set_int     -> av_opt_set_int
+
+        f884ef0 / 41d9d51 av_get_string  -> av_opt_get
+                av_get_double  -> av_opt_get_double
+                av_get_q       -> av_opt_get_q
+                av_get_int     -> av_opt_get_int
+
+  - f884ef0 / 8c5dcaa trivial rename av_next_option -> av_opt_next
+  - f884ef0 / 641c7af new functions - av_opt_child_next, av_opt_child_class_next
+    and av_opt_find2()
+
[phone] - a70e787 - lavu 51.17.0
+  Add av_x_if_null().
+
[phone] - 645cebb - lavc 53.16.0
+  Add showall flag2
+
[phone] - ea8de10 - lavfi 2.42.0
+  Add avfilter_all_channel_layouts.
+
[phone] - 9899037 - lavfi 2.41.0
+  Rename avfilter_all_* function names to avfilter_make_all_*.
+
+  In particular, apply the renames:
+  avfilter_all_formats         -> avfilter_make_all_formats
+  avfilter_all_channel_layouts -> avfilter_make_all_channel_layouts
+  avfilter_all_packing_formats -> avfilter_make_all_packing_formats
+
[phone] - 4381bdd - lavfi 2.40.0
+  Change AVFilterBufferRefAudioProps.sample_rate type from uint32_t to int.
+
[phone] - 2c03174 - lavfi 2.40.0
+  Simplify signature for avfilter_get_audio_buffer(), make it
+  consistent with avfilter_get_video_buffer().
+
[phone] - 4f7dfe1 - lavfi 2.39.0
+  Rename libavfilter/vsink_buffer.h to libavfilter/buffersink.h.
+
[phone] - c4415f6 - lavfi 2.38.0
+  Unify video and audio sink API.
+
+  In particular, add av_buffersink_get_buffer_ref(), deprecate
+  av_vsink_buffer_get_video_buffer_ref() and change the value for the
+  opaque field passed to the abuffersink init function.
+
[phone] - 61e2e29 - lavu 51.16.0
+  Add av_asprintf().
+
[phone] - dacd827 - lavf 53.10.0
+  Add av_find_program_from_stream().
+
[phone] - 69e2c1a - lavu 51.13.0
+  Add av_get_media_type_string().
+
[phone] - 1889c67 / fb4ca26 - lavc 53.13.0
+                       lavf 53.11.0
+                       lsws  2.1.0
+  Add {avcodec,avformat,sws}_get_class().
+
[phone] - 1889c67 / c11fb82 - lavu 51.15.0
+  Add AV_OPT_SEARCH_FAKE_OBJ flag for av_opt_find() function.
+
[phone] - 323b930 - lavu 51.12.0
+  Add av_fifo_peek2(), deprecate av_fifo_peek().
+
[phone] - lavu 51.14.0 / 51.9.0
+  - 976a8b2 / add41de..976a8b2 / abc78a5 Do not include intfloat_readwrite.h,
+    mathematics.h, rational.h, pixfmt.h, or log.h from avutil.h.
+
[phone] - 27fbe31 / 48f9e45 - lavf 53.11.0 / 53.8.0
+  Add avformat_query_codec().
+
[phone] - 27fbe31 / bca06e7 - lavc 53.11.0
+  Add avcodec_get_type().
+
[phone] - 0cb233c / 2f63440 - lavf 53.7.0
+  Add error_recognition to AVFormatContext.
+
[phone] - 1d186e9 / 9d39cbf - lavc 53.9.1
+  Add AV_PKT_FLAG_CORRUPT AVPacket flag.
+
[phone] - b57df29 - lavfi 2.27.0
+  Add audio packing negotiation fields and helper functions.
+
+  In particular, add AVFilterPacking enum, planar, in_packings and
+  out_packings fields to AVFilterLink, and the functions:
+  avfilter_set_common_packing_formats()
+  avfilter_all_packing_formats()
+
[phone] - 3602ad7 / a67c061 - lavf 53.6.0
+  Add avformat_find_stream_info(), deprecate av_find_stream_info().
+  NOTE: this was backported to 0.7
+
[phone] - 3602ad7 / 0b950fe - lavc 53.8.0
+  Add avcodec_open2(), deprecate avcodec_open().
+  NOTE: this was backported to 0.7
+
+  Add avcodec_alloc_context3. Deprecate avcodec_alloc_context() and
+  avcodec_alloc_context2().
+
[phone] - b442ca6 - lavf 53.5.0 - avformat.h
+  Add function av_get_output_timestamp().
+
[phone] - 5129336 - lavu 51.11.0 - avutil.h
+  Define the AV_PICTURE_TYPE_NONE value in AVPictureType enum.
+
[phone] - fd2c0a5 - lavfi 2.23.0 - avfilter.h
+  Add layout negotiation fields and helper functions.
+
+  In particular, add in_chlayouts and out_chlayouts to AVFilterLink,
+  and the functions:
+  avfilter_set_common_sample_formats()
+  avfilter_set_common_channel_layouts()
+  avfilter_all_channel_layouts()
+
[phone] - 527ca39 - lavfi 2.22.0 - AVFilterFormats
+  Change type of AVFilterFormats.formats from int * to int64_t *,
+  and update formats handling API accordingly.
+
+  avfilter_make_format_list() still takes a int32_t array and converts
+  it to int64_t. A new function, avfilter_make_format64_list(), that
+  takes int64_t arrays has been added.
+
[phone] - 44f669e - lavfi 2.21.0 - vsink_buffer.h
+  Add video sink buffer and vsink_buffer.h public header.
+
[phone] - 9fdf772 - lavfi 2.18.0 - avcodec.h
+  Add avfilter_get_video_buffer_ref_from_frame() function in
+  libavfilter/avcodec.h.
+
[phone] - c535494 - lavfi 2.17.0 - avfiltergraph.h
+  Add avfilter_inout_alloc() and avfilter_inout_free() functions.
+
[phone] - 6119b23 - lavfi 2.16.0 - avfilter_graph_parse()
+  Change avfilter_graph_parse() signature.
+
[phone] - 686959e / 67e9ae1 - lavu 51.10.0 / 51.8.0 - attributes.h
+  Add av_printf_format().
+
[phone] - 2905e3f / 05e84c9, 2905e3f / 25de595 - lavf 53.4.0 / 53.2.0 - avformat.h
+  Add avformat_open_input and avformat_write_header().
+  Deprecate av_open_input_stream, av_open_input_file,
+  AVFormatParameters and av_write_header.
+
[phone] - 2905e3f / 7e83e1c, 2905e3f / dc59ec5 - lavu 51.9.0 / 51.7.0 - opt.h
+  Add av_opt_set_dict() and av_opt_find().
+  Deprecate av_find_opt().
+  Add AV_DICT_APPEND flag.
+
[phone] - 45fb647 / cb7c11c - lavu 51.6.0 - opt.h
+  Add av_opt_flag_is_set().
+
[phone] - c381960 - lavfi 2.15.0 - avfilter_get_audio_buffer_ref_from_arrays
+  Add avfilter_get_audio_buffer_ref_from_arrays() to avfilter.h.
+
[phone] - f9ecb84 / d9f80ea - lavu 51.8.0 - AVMetadata
+  Move AVMetadata from lavf to lavu and rename it to
+  AVDictionary -- new installed header dict.h.
+  All av_metadata_* functions renamed to av_dict_*.
+
[phone] - d552f61 / a6703fa - lavu 51.8.0 - av_get_bytes_per_sample()
+  Add av_get_bytes_per_sample() in libavutil/samplefmt.h.
+  Deprecate av_get_bits_per_sample_fmt().
+
[phone] - f956924 / b39b062 - lavu 51.8.0 - opt.h
+  Add av_opt_free convenience function.
+
[phone] - 95a0242 - lavfi 2.14.0 - AVFilterBufferRefAudioProps
+  Remove AVFilterBufferRefAudioProps.size, and use nb_samples in
+  avfilter_get_audio_buffer() and avfilter_default_get_audio_buffer() in
+  place of size.
+
[phone] - 0bc2cca - lavu 51.6.0 - av_samples_alloc()
+  Switch nb_channels and nb_samples parameters order in
+  av_samples_alloc().
+
[phone] - e1c7414 - lavu 51.5.0 - av_samples_*
+  Change the data layout created by av_samples_fill_arrays() and
+  av_samples_alloc().
+
[phone] - 27bcf55 - lavfi 2.13.0 - vsrc_buffer.h
+  Make av_vsrc_buffer_add_video_buffer_ref() accepts an additional
+  flags parameter in input.
+
[phone] - e977ca2 - lavfi 2.12.0 - avfilter_link_free()
+  Add avfilter_link_free() function.
+
[phone] - 5ad38d9 - lavu 51.4.0 - av_force_cpu_flags()
+  Add av_cpu_flags() in libavutil/cpu.h.
+
[phone] - e71f260 - lavu 51.3.0 - pixdesc.h
+  Add av_get_pix_fmt_name() in libavutil/pixdesc.h, and deprecate
+  avcodec_get_pix_fmt_name() in libavcodec/avcodec.h in its favor.
+
[phone] - 39e4206 / 30315a8 - lavf 53.3.0 - avformat.h
+  Add fps_probe_size to AVFormatContext.
+
[phone] - 5ecdfd0 - lavf 53.2.0 - avformat.h
+  Introduce avformat_alloc_output_context2() and deprecate
+  avformat_alloc_output_context().
+
[phone] - 83db719 - lavfi 2.10.0 - vsrc_buffer.h
+  Make libavfilter/vsrc_buffer.h public.
+
[phone] - c000a9f - lavfi 2.8.0 - avcodec.h
+  Add av_vsrc_buffer_add_frame() to libavfilter/avcodec.h.
+
[phone] - 9fdf772 - lavfi 2.6.0 - avcodec.h
+  Add avfilter_get_video_buffer_ref_from_frame() to libavfilter/avcodec.h.
+
[phone] - 75a37b5 / 64150ff - lavc 53.7.0 - AVCodecContext.request_sample_fmt
+  Add request_sample_fmt field to AVCodecContext.
+
[phone] - 59eb12f / 188dea1 - lavc 53.6.0 - avcodec.h
+  Deprecate AVLPCType and the following fields in
+  AVCodecContext: lpc_coeff_precision, prediction_order_method,
+  min_partition_order, max_partition_order, lpc_type, lpc_passes.
+  Corresponding FLAC encoder options should be used instead.
+
[phone] - 9fdf772 - lavfi 2.5.0 - avcodec.h
+  Add libavfilter/avcodec.h header and avfilter_copy_frame_props()
+  function.
+
[phone] - 18ded93 - lavc 53.5.0 - AVFrame
+  Add format field to AVFrame.
+
[phone] - 22333a6 - lavc 53.4.0 - AVFrame
+  Add width and height fields to AVFrame.
+
[phone] - 35fe66a - lavfi 2.4.0 - avfilter.h
+  Rename AVFilterBufferRefVideoProps.pixel_aspect to
+  sample_aspect_ratio.
+
[phone] - 77e9dee - lavc 53.3.0 - AVFrame
+  Add a sample_aspect_ratio field to AVFrame.
+
[phone] - 1ba5727 - lavc 53.2.0 - AVFrame
+  Add a pkt_pos field to AVFrame.
+
[phone] - 35ceaa7 - lavu 51.2.0 - mem.h
+  Add av_dynarray_add function for adding
+  an element to a dynamic array.
+
[phone] - d7e5aeb / bebe72f - lavu 51.1.0 - avutil.h
+  Add AVPictureType enum and av_get_picture_type_char(), deprecate
+  FF_*_TYPE defines and av_get_pict_type_char() defined in
+  libavcodec/avcodec.h.
+
[phone] - d7e5aeb / 10d3940 - lavfi 2.3.0 - avfilter.h
+  Add pict_type and key_frame fields to AVFilterBufferRefVideo.
+
[phone] - d7e5aeb / 7a11c82 - lavfi 2.2.0 - vsrc_buffer
+  Add sample_aspect_ratio fields to vsrc_buffer arguments
+
[phone] - 8772156 / 94f7451 - lavc 53.1.0 - avcodec.h
+  Add CODEC_CAP_SLICE_THREADS for codecs supporting sliced threading.
+
[phone] - lavc 52.120.0 - avcodec.h
+  AVPacket structure got additional members for passing side information:
+    c407984 / 4de339e introduce side information for AVPacket
+    c407984 / 2d8591c make containers pass palette change in AVPacket
+
[phone] - lavf 52.107.0 - avio.h
+  Avio cleanup, part II - deprecate the entire URLContext API:
+    c55780d / 175389c add avio_check as a replacement for url_exist
+    9891004 / ff1ec0c add avio_pause and avio_seek_time as replacements
+            for _av_url_read_fseek/fpause
+    d4d0932 / cdc6a87 deprecate av_protocol_next(), avio_enum_protocols
+            should be used instead.
+    c88caa5 / 80c6e23 rename url_set_interrupt_cb->avio_set_interrupt_cb.
+    c88caa5 / f87b1b3 rename open flags: URL_* -> AVIO_*
+    d4d0932 / f8270bb add avio_enum_protocols.
+    d4d0932 / 5593f03 deprecate URLProtocol.
+    d4d0932 / c486dad deprecate URLContext.
+    d4d0932 / 026e175 deprecate the typedef for URLInterruptCB
+    c88caa5 / 8e76a19 deprecate av_register_protocol2.
+    11d7841 / b840484 deprecate URL_PROTOCOL_FLAG_NESTED_SCHEME
+    11d7841 / 1305d93 deprecate av_url_read_seek
+    11d7841 / fa104e1 deprecate av_url_read_pause
+    434f248 / 727c7aa deprecate url_get_filename().
+    434f248 / 5958df3 deprecate url_max_packet_size().
+    434f248 / 1869ea0 deprecate url_get_file_handle().
+    434f248 / 32a97d4 deprecate url_filesize().
+    434f248 / e52a914 deprecate url_close().
+    434f248 / 58a48c6 deprecate url_seek().
+    434f248 / 925e908 deprecate url_write().
+    434f248 / dce3756 deprecate url_read_complete().
+    434f248 / bc371ac deprecate url_read().
+    434f248 / 0589da0 deprecate url_open().
+    434f248 / 62eaaea deprecate url_connect.
+    434f248 / 5652bb9 deprecate url_alloc.
+    434f248 / 333e894 deprecate url_open_protocol
+    434f248 / e230705 deprecate url_poll and URLPollEntry
+
[phone] - lavf 52.106.0 - avformat.h
+  Minor avformat.h cleanup:
+    d4d0932 / a9bf9d8 deprecate av_guess_image2_codec
+    d4d0932 / c3675df rename avf_sdp_create->av_sdp_create
+
[phone] - lavf 52.105.0 - avio.h
+  Large-scale renaming/deprecating of AVIOContext-related functions:
+    2cae980 / 724f6a0 deprecate url_fdopen
+    2cae980 / 403ee83 deprecate url_open_dyn_packet_buf
+    2cae980 / 6dc7d80 rename url_close_dyn_buf       -> avio_close_dyn_buf
+    2cae980 / b92c545 rename url_open_dyn_buf        -> avio_open_dyn_buf
+    2cae980 / 8978fed introduce an AVIOContext.seekable field as a replacement for
+            AVIOContext.is_streamed and url_is_streamed()
+    1caa412 / b64030f deprecate get_checksum()
+    1caa412 / 4c4427a deprecate init_checksum()
+    2fd41c9 / 4ec153b deprecate udp_set_remote_url/get_local_port
+    4fa0e24 / 933e90a deprecate av_url_read_fseek/fpause
+    4fa0e24 / 8d9769a deprecate url_fileno
+    0fecf26 / b7f2fdd rename put_flush_packet -> avio_flush
+    0fecf26 / 35f1023 deprecate url_close_buf
+    0fecf26 / 83fddae deprecate url_open_buf
+    0fecf26 / d9d86e0 rename url_fprintf -> avio_printf
+    0fecf26 / 59f65d9 deprecate url_setbufsize
+    6947b0c / 3e68b3b deprecate url_ferror
+    e8bb2e2 deprecate url_fget_max_packet_size
+    76aa876 rename url_fsize -> avio_size
+    e519753 deprecate url_fgetc
+    655e45e deprecate url_fgets
+    a2704c9 rename url_ftell -> avio_tell
+    e16ead0 deprecate get_strz() in favor of avio_get_str
+    0300db8,2af07d3 rename url_fskip -> avio_skip
+    6b4aa5d rename url_fseek -> avio_seek
+    61840b4 deprecate put_tag
+    22a3212 rename url_fopen/fclose -> avio_open/close.
+    0ac8e2b deprecate put_nbyte
+    77eb550 rename put_byte          -> avio_w8
+                   put_[b/l]e<type>  -> avio_w[b/l]<type>
+                   put_buffer        -> avio_write
+    b7effd4 rename get_byte          -> avio_r8,
+                   get_[b/l]e<type>  -> avio_r[b/l]<type>
+                   get_buffer        -> avio_read
+    b3db9ce deprecate get_partial_buffer
+    8d9ac96 rename av_alloc_put_byte -> avio_alloc_context
+
[phone] - 27ef7b1 / 34b47d7 - lavc 52.115.0 - AVCodecContext.audio_service_type
+  Add audio_service_type field to AVCodecContext.
+
[phone] - e309fdc - lavu 50.40.0 - pixfmt.h
+  Add PIX_FMT_BGR48LE and PIX_FMT_BGR48BE pixel formats
+
[phone] - 863c471 - lavf  52.103.0 - av_pkt_dump2, av_pkt_dump_log2
+  Add new functions av_pkt_dump2, av_pkt_dump_log2 that uses the
+  source stream timebase for outputting timestamps. Deprecate
+  av_pkt_dump and av_pkt_dump_log.
+
[phone] - e731b8d - lavf  52.102.0 - avio.h
+  * e731b8d - rename init_put_byte() to ffio_init_context(), deprecating the
+              original, and move it to a private header so it is no longer
+              part of our public API. Instead, use av_alloc_put_byte().
+  * ae628ec - rename ByteIOContext to AVIOContext.
+
[phone] - 09d171b - lavf  52.101.0 - avformat.h
+                       lavu  52.39.0  - parseutils.h
+  * 610219a - Add av_ prefix to dump_format().
+  * f6c7375 - Replace parse_date() in lavf with av_parse_time() in lavu.
+  * ab0287f - Move find_info_tag from lavf to lavu and add av_prefix to it.
+
[phone] - lavu 52.38.0 - merge libavcore
+  libavcore is merged back completely into libavutil
+
[phone] - 55bad0c - lavc 52.113.0 - vbv_delay
+  Add vbv_delay field to AVCodecContext
+
[phone] - 24a83bd - lavf 52.100.0 - AV_DISPOSITION_CLEAN_EFFECTS
+  Add AV_DISPOSITION_CLEAN_EFFECTS disposition flag.
+
[phone] - 910b5b8 - lavfi 1.76.0 - AVFilterLink sample_aspect_ratio
+  Add sample_aspect_ratio field to AVFilterLink.
+
[phone] - 12c14cd - lavf 52.99.0 - AVStream.disposition
+  Add AV_DISPOSITION_HEARING_IMPAIRED and AV_DISPOSITION_VISUAL_IMPAIRED.
+
[phone] - c0b102c - lavc 52.112.0 - avcodec_thread_init()
+  Deprecate avcodec_thread_init()/avcodec_thread_free() use; instead
+  set thread_count before calling avcodec_open.
+
[phone] - 37b00b4 - lavc 52.111.0 - threading API
+  Add CODEC_CAP_FRAME_THREADS with new restrictions on get_buffer()/
+  release_buffer()/draw_horiz_band() callbacks for appropriate codecs.
+  Add thread_type and active_thread_type fields to AVCodecContext.
+
[phone] - 3940caa - lavf 52.98.0 - av_probe_input_buffer
+  Add av_probe_input_buffer() to avformat.h for probing format from a
+  ByteIOContext.
+
[phone] - fe174fc - lavf 52.97.0 - avio.h
+  Add flag for non-blocking protocols: URL_FLAG_NONBLOCK
+
[phone] - f124b08 - lavf 52.96.0 - avformat_free_context()
+  Add avformat_free_context() in avformat.h.
+
[phone] - f5b82f4 - lavc 52.109.0 - add CODEC_ID_PRORES
+  Add CODEC_ID_PRORES to avcodec.h.
+
[phone] - fe9a3fb - lavc 52.109.0 - H.264 profile defines
+  Add defines for H.264 * Constrained Baseline and Intra profiles
+
[phone] - lavf 52.95.0
+  * 50196a9 - add a new installed header version.h.
+  * 4efd5cf, dccbd97, 93b78d1 - add several variants of public
+    avio_{put,get}_str* functions.  Deprecate corresponding semi-public
+    {put,get}_str*.
+
[phone] - dfd2a00 - lavu 50.37.0 - log.h
+  Make av_dlog public.
+
[phone] - 7b3ea55 - lavfi 1.76.0 - vsrc_buffer
+  Add sample_aspect_ratio fields to vsrc_buffer arguments
+
[phone] - 910b5b8 - lavfi 1.75.0 - AVFilterLink sample_aspect_ratio
+  Add sample_aspect_ratio field to AVFilterLink.
+
[phone] - a242ac3 - lavfi 1.74.0 - AVFilterBufferRefAudioProps
+  Rename AVFilterBufferRefAudioProps.samples_nb to nb_samples.
+
[phone] - 7f88a5b - lavf 52.93.0 - av_metadata_copy()
+  Add av_metadata_copy() in avformat.h.
+
[phone] - 81c623f - lavc 52.107.0 - deprecate reordered_opaque
+  Deprecate reordered_opaque in favor of pkt_pts/dts.
+
[phone] - 1919fea - lavc 52.106.0 - pkt_dts
+  Add pkt_dts to AVFrame, this will in the future allow multithreading decoders
+  to not mess up dts.
+
[phone] - 393cbb9 - lavc 52.105.0 - pkt_pts
+  Add pkt_pts to AVFrame.
+
[phone] - 060ec0a - lavc 52.104.0 - av_get_profile_name()
+  Add av_get_profile_name to libavcodec/avcodec.h.
+
[phone] - 0ccabee - lavfi 1.71.0 - AV_PERM_NEG_LINESIZES
+  Add AV_PERM_NEG_LINESIZES in avfilter.h.
+
[phone] - 9128ae0 - lavf 52.91.0 - av_find_best_stream()
+  Add av_find_best_stream to libavformat/avformat.h.
+
[phone] - 107a7e3 - lavf 52.90.0
+  Add AVFMT_NOSTREAMS flag for formats with no streams,
+  like e.g. text metadata.
+
[phone] - 0328b9e - lavu 50.36.0 - file.h
+  Add functions av_file_map() and av_file_unmap() in file.h.
+
[phone] - 0bc55f5 - lavu 50.35.0 - error.h
+  Add "not found" error codes:
+  AVERROR_DEMUXER_NOT_FOUND
+  AVERROR_MUXER_NOT_FOUND
+  AVERROR_DECODER_NOT_FOUND
+  AVERROR_ENCODER_NOT_FOUND
+  AVERROR_PROTOCOL_NOT_FOUND
+  AVERROR_FILTER_NOT_FOUND
+  AVERROR_BSF_NOT_FOUND
+  AVERROR_STREAM_NOT_FOUND
+
[phone] - c61cdd0 - lavcore 0.16.0 - avcore.h
+  Move AV_NOPTS_VALUE, AV_TIME_BASE, AV_TIME_BASE_Q symbols from
+  avcodec.h to avcore.h.
+
[phone] - 16cfc96 - lavc 52.98.0 - CODEC_CAP_NEG_LINESIZES
+  Add CODEC_CAP_NEG_LINESIZES codec capability flag in avcodec.h.
+
[phone] - bb4afa1 - lavu 50.34.0 - av_get_pix_fmt_string()
+  Deprecate avcodec_pix_fmt_string() in favor of
+  pixdesc.h/av_get_pix_fmt_string().
+
[phone] - 4da12e3 - lavcore 0.15.0 - av_image_alloc()
+  Add av_image_alloc() to libavcore/imgutils.h.
+
[phone] - 037be76 - lavfi 1.67.0 - avfilter_graph_create_filter()
+  Add function avfilter_graph_create_filter() in avfiltergraph.h.
+
[phone] - 4723bc2 - lavfi 1.65.0 - avfilter_get_video_buffer_ref_from_arrays()
+  Add function avfilter_get_video_buffer_ref_from_arrays() in
+  avfilter.h.
+
[phone] - 176a615 - lavcore 0.14.0 - audioconvert.h
+  Add a public audio channel API in audioconvert.h, and deprecate the
+  corresponding functions in libavcodec:
+  avcodec_get_channel_name()
+  avcodec_get_channel_layout()
+  avcodec_get_channel_layout_string()
+  avcodec_channel_layout_num_channels()
+  and the CH_* macros defined in libavcodec/avcodec.h.
+
[phone] - 6bfc268 - lavf 52.85.0 - avformat.h
+  Add av_append_packet().
+
[phone] - a08d918 - lavc 52.97.0 - avcodec.h
+  Add av_grow_packet().
+
[phone] - 0985e1a - lavcore 0.13.0 - parseutils.h
+  Add av_parse_color() declared in libavcore/parseutils.h.
+
[phone] - cb2c971 - lavc 52.95.0 - AVCodecContext
+  Add AVCodecContext.subtitle_header and AVCodecContext.subtitle_header_size
+  fields.
+
[phone] - 5aaea02 - lavfi 1.62.0 - avfiltergraph.h
+  Make avfiltergraph.h public.
+
[phone] - 4fcbb2a - lavfi 1.61.0 - avfiltergraph.h
+  Remove declarations from avfiltergraph.h for the functions:
+  avfilter_graph_check_validity()
+  avfilter_graph_config_links()
+  avfilter_graph_config_formats()
+  which are now internal.
+  Use avfilter_graph_config() instead.
+
[phone] - d2af720 - lavu 50.33.0 - eval.h
+  Deprecate functions:
+  av_parse_and_eval_expr(),
+  av_parse_expr(),
+  av_eval_expr(),
+  av_free_expr(),
+  in favor of the functions:
+  av_expr_parse_and_eval(),
+  av_expr_parse(),
+  av_expr_eval(),
+  av_expr_free().
+
[phone] - 24de0ed - lavfi 1.59.0 - avfilter_free()
+  Rename avfilter_destroy() to avfilter_free().
+  This change breaks libavfilter API/ABI.
+
[phone] - 1e80a0e - lavfi 1.58.0 - avfiltergraph.h
+  Remove graphparser.h header, move AVFilterInOut and
+  avfilter_graph_parse() declarations to libavfilter/avfiltergraph.h.
+
[phone] - 7313132 - lavfi 1.57.0 - AVFilterInOut
+  Rename field AVFilterInOut.filter to AVFilterInOut.filter_ctx.
+  This change breaks libavfilter API.
+
[phone] - 97dd1e4 - lavfi 1.56.0 - avfilter_graph_free()
+  Rename avfilter_graph_destroy() to avfilter_graph_free().
+  This change breaks libavfilter API/ABI.
+
[phone] - e15aeea - lavfi 1.55.0 - avfilter_graph_alloc()
+  Add avfilter_graph_alloc() to libavfilter/avfiltergraph.h.
+
[phone] - 6f84cd1 - lavcore 0.12.0 - av_get_bits_per_sample_fmt()
+  Add av_get_bits_per_sample_fmt() to libavcore/samplefmt.h and
+  deprecate av_get_bits_per_sample_format().
+
[phone] - d63e456 - lavcore 0.11.0 - samplefmt.h
+  Add sample format functions in libavcore/samplefmt.h:
+  av_get_sample_fmt_name(),
+  av_get_sample_fmt(),
+  av_get_sample_fmt_string(),
+  and deprecate the corresponding libavcodec/audioconvert.h functions:
+  avcodec_get_sample_fmt_name(),
+  avcodec_get_sample_fmt(),
+  avcodec_sample_fmt_string().
+
[phone] - 262d1c5 - lavcore 0.10.0 - samplefmt.h
+  Define enum AVSampleFormat in libavcore/samplefmt.h, deprecate enum
+  SampleFormat.
+
[phone] - 2a24df9 - lavfi 1.52.0 - avfilter_graph_config()
+  Add the function avfilter_graph_config() in avfiltergraph.h.
+
[phone] - 03700d3 - lavf 52.83.0 - metadata API
+  Change demuxers to export metadata in generic format and
+  muxers to accept generic format. Deprecate the public
+  conversion API.
+
[phone] - 867ae7a - lavfi 1.49.0 - AVFilterLink.time_base
+  Add time_base field to AVFilterLink.
+
[phone] - c85eef4 - lavu 50.31.0 - av_set_options_string()
+  Move av_set_options_string() from libavfilter/parseutils.h to
+  libavutil/opt.h.
+
[phone] - acc0490 - lavfi 1.47.0 - AVFilterLink
+  Make the AVFilterLink fields srcpad and dstpad store the pointers to
+  the source and destination pads, rather than their indexes.
+
[phone] - 372e288 - lavu 50.30.0 - av_get_token()
+  Move av_get_token() from libavfilter/parseutils.h to
+  libavutil/avstring.h.
+
[phone] - 635d4ae - lsws 0.12.0 - swscale.h
+  Add the functions sws_alloc_context() and sws_init_context().
+
[phone] - 6ed0404 - lavu 50.29.0 - opt.h
+  Move libavcodec/opt.h to libavutil/opt.h.
+
[phone] - 1c1c80f - lavu 50.28.0 - av_log_set_flags()
+  Default of av_log() changed due to many problems to the old no repeat
+  detection. Read the docs of AV_LOG_SKIP_REPEATED in log.h before
+  enabling it for your app!.
+
[phone] - f66eb58 - lavc 52.90.0 - av_opt_show2()
+  Deprecate av_opt_show() in favor or av_opt_show2().
+
[phone] - bc6f0af - lavu 50.27.0 - av_popcount()
+  Add av_popcount() to libavutil/common.h.
+
[phone] - c6c98d0 - lavu 50.26.0 - av_get_cpu_flags()
+  Add av_get_cpu_flags().
+
[phone] - 34017fd - lavcore 0.9.0 - av_image_copy()
+  Add av_image_copy().
+
[phone] - 9686abb - lavcore 0.8.0 - av_image_copy_plane()
+  Add av_image_copy_plane().
+
[phone] - 9b7269e - lavcore 0.7.0 - imgutils.h
+  Adopt hierarchical scheme for the imgutils.h function names,
+  deprecate the old names.
+
[phone] - 7160bb7 - lavu 50.25.0 - AV_CPU_FLAG_*
+  Deprecate the FF_MM_* flags defined in libavcodec/avcodec.h in favor
+  of the AV_CPU_FLAG_* flags defined in libavutil/cpu.h.
+
[phone] - 5da19b5 - lavc 52.87.0 - avcodec_get_channel_layout()
+  Add avcodec_get_channel_layout() in audioconvert.h.
+
[phone] - e344336 - lavcore 0.6.0 - av_fill_image_max_pixsteps()
+  Rename av_fill_image_max_pixstep() to av_fill_image_max_pixsteps().
+
[phone] - a6ddf8b - lavcore 0.5.0 - av_fill_image_max_pixstep()
+  Add av_fill_image_max_pixstep() in imgutils.h.
+
[phone] - 4f2d2e4 - lavu 50.24.0 - AV_NE()
+  Add the AV_NE macro.
+
[phone] - ad2c950 - lavfi 1.36.0 - audio framework
+  Implement AVFilterBufferRefAudioProps struct for audio properties,
+  get_audio_buffer(), filter_samples() functions and related changes.
+
[phone] - 81c1eca - lavcore 0.4.0 - av_get_image_linesize()
+  Add av_get_image_linesize() in imgutils.h.
+
[phone] - c1db7bf - lavfi 1.34.0 - AVFilterBufferRef
+  Resize data and linesize arrays in AVFilterBufferRef to 8.
+
+  This change breaks libavfilter API/ABI.
+
[phone] - 9f08d80 - lavc 52.85.0 - av_picture_data_copy()
+  Add av_picture_data_copy in avcodec.h.
+
[phone] - 84c0386 - lavfi 1.33.0 - avfilter_open()
+  Change avfilter_open() signature:
+  AVFilterContext *avfilter_open(AVFilter *filter, const char *inst_name) ->
+  int avfilter_open(AVFilterContext **filter_ctx, AVFilter *filter, const char *inst_name);
+
+  This change breaks libavfilter API/ABI.
+
[phone] - cc80caf - lavfi 1.32.0 - AVFilterBufferRef
+  Add a type field to AVFilterBufferRef, and move video specific
+  properties to AVFilterBufferRefVideoProps.
+
+  This change breaks libavfilter API/ABI.
+
[phone] - 5d4890d - lavfi 1.31.0 - AVFilterLink
+  Rename AVFilterLink fields:
+  AVFilterLink.srcpic    ->  AVFilterLink.src_buf
+  AVFilterLink.cur_pic   ->  AVFilterLink.cur_buf
+  AVFilterLink.outpic    ->  AVFilterLink.out_buf
+
[phone] - 7fce481 - lavfi 1.30.0
+  Rename functions and fields:
+  avfilter_(un)ref_pic       -> avfilter_(un)ref_buffer
+  avfilter_copy_picref_props -> avfilter_copy_buffer_ref_props
+  AVFilterBufferRef.pic      -> AVFilterBufferRef.buffer
+
[phone] - ecc8dad - lavfi 1.29.0 - AVFilterBufferRef
+  Rename AVFilterPicRef to AVFilterBufferRef.
+
[phone] - d54e094 - lavfi 1.28.0 - AVFilterBuffer
+  Move format field from AVFilterBuffer to AVFilterPicRef.
+
[phone] - bf176f5 - lavcore 0.3.0 - av_check_image_size()
+  Deprecate avcodec_check_dimensions() in favor of the function
+  av_check_image_size() defined in libavcore/imgutils.h.
+
[phone] - 56b5e9d - lavfi 1.27.0 - AVFilterBuffer
+  Increase size of the arrays AVFilterBuffer.data and
+  AVFilterBuffer.linesize from 4 to 8.
+
+  This change breaks libavfilter ABI.
+
[phone] - e7bd48a - lavcore 0.2.0 - imgutils.h
+  Add functions av_fill_image_linesizes() and
+  av_fill_image_pointers(), declared in libavcore/imgutils.h.
+
[phone] - 126b638 - lavcore 0.1.0 - parseutils.h
+  Deprecate av_parse_video_frame_size() and av_parse_video_frame_rate()
+  defined in libavcodec in favor of the newly added functions
+  av_parse_video_size() and av_parse_video_rate() declared in
+  libavcore/parseutils.h.
+
[phone] - 4485247 - lavu 50.23.0 - mathematics.h
+  Add the M_PHI constant definition.
+
[phone] - bdab614 - lavfi 1.26.0 - media format generalization
+  Add a type field to AVFilterLink.
+
+  Change the field types:
+  enum PixelFormat format   -> int format   in AVFilterBuffer
+  enum PixelFormat *formats -> int *formats in AVFilterFormats
+  enum PixelFormat *format  -> int format   in AVFilterLink
+
+  Change the function signatures:
+  AVFilterFormats *avfilter_make_format_list(const enum PixelFormat *pix_fmts); ->
+  AVFilterFormats *avfilter_make_format_list(const int *fmts);
+
+  int avfilter_add_colorspace(AVFilterFormats **avff, enum PixelFormat pix_fmt); ->
+  int avfilter_add_format    (AVFilterFormats **avff, int fmt);
+
+  AVFilterFormats *avfilter_all_colorspaces(void); ->
+  AVFilterFormats *avfilter_all_formats    (enum AVMediaType type);
+
+  This change breaks libavfilter API/ABI.
+
[phone] - aac6ca6 - lavcore 0.0.0
+  Add libavcore.
+
[phone] - b5c582f - lavfi 1.25.0 - AVFilterBuffer
+  Remove w and h fields from AVFilterBuffer.
+
[phone] - f0d77b2 - lavfi 1.24.0 - AVFilterBuffer
+  Rename AVFilterPic to AVFilterBuffer.
+
[phone] - 57fe80f - lavf 52.74.0 - url_fskip()
+  Make url_fskip() return an int error code instead of void.
+
[phone] - 23940f1 - lavc 52.83.0
+  Add AVCodecContext.lpc_type and AVCodecContext.lpc_passes fields.
+  Add AVLPCType enum.
+  Deprecate AVCodecContext.use_lpc.
+
[phone] - e1d7c88 - lavc 52.82.0 - avsubtitle_free()
+  Add a function for free the contents of a AVSubtitle generated by
+  avcodec_decode_subtitle.
+
[phone] - b91d08f - lavu 50.22.0 - bswap.h and intreadwrite.h
+  Make the bswap.h and intreadwrite.h API public.
+
[phone] - ce1cd1c - lavu 50.21.0 - pixdesc.h
+  Rename read/write_line() to av_read/write_image_line().
+
[phone] - 4d508e4 - lavfi 1.21.0 - avfilter_copy_picref_props()
+  Add avfilter_copy_picref_props().
+
[phone] - 2d525ef - lavc 52.79.0
+  Add FF_COMPLIANCE_UNOFFICIAL and change all instances of
+  FF_COMPLIANCE_INOFFICIAL to use FF_COMPLIANCE_UNOFFICIAL.
+
[phone] - 89eec74 - lavu 50.20.0 - lfg.h
+  Export av_lfg_init(), av_lfg_get(), av_mlfg_get(), and av_bmg_get() through
+  lfg.h.
+
[phone] - a52e2c3 - lavfi 1.20.1 - av_parse_color()
+  Extend av_parse_color() syntax, make it accept an alpha value specifier and
+  set the alpha value to 255 by default.
+
[phone] - 735cf6b - lavf 52.71.0 - URLProtocol.priv_data_size, priv_data_class
+  Add priv_data_size and priv_data_class to URLProtocol.
+
[phone] - ffbb289 - lavf 52.70.0 - url_alloc(), url_connect()
+  Add url_alloc() and url_connect().
+
[phone] - 9b07a2d - lavf 52.69.0 - av_register_protocol2()
+  Add av_register_protocol2(), deprecating av_register_protocol().
+
[phone] - 65db058 - lavu 50.19.0 - av_compare_mod()
+  Add av_compare_mod() to libavutil/mathematics.h.
+
[phone] - 0b99215 - lavu 50.18.0 - eval API
+  Make the eval API public.
+
[phone] - 31878fc - lavu 50.17.0 - AV_BASE64_SIZE
+  Add AV_BASE64_SIZE() macro.
+
[phone] - 7e566bb - lavc 52.73.0 - av_get_codec_tag_string()
+  Add av_get_codec_tag_string().
+
[phone] - 2b99142 - lsws 0.11.0 - convertPalette API
+  Add sws_convertPalette8ToPacked32() and sws_convertPalette8ToPacked24().
+
[phone] - 93ebfee - lavc 52.72.0 - CODEC_CAP_EXPERIMENTAL
+  Add CODEC_CAP_EXPERIMENTAL flag.
+  NOTE: this was backported to 0.6
+
[phone] - 9977863 - lavu 50.16.0 - av_get_random_seed()
+  Add av_get_random_seed().
+
[phone] - 796ac23 - lavf 52.63.0 - AVFMT_FLAG_RTP_HINT
+  Add AVFMT_FLAG_RTP_HINT as possible value for AVFormatContext.flags.
+  NOTE: this was backported to 0.6
+
[phone] - b6bc205 - lavfi 1.20.0 - AVFilterPicRef
+  Add interlaced and top_field_first fields to AVFilterPicRef.
+
+------------------------------8<-------------------------------------
+                   0.6 branch was cut here
+----------------------------->8--------------------------------------
+
[phone] - 8e2ee18 - lavf 52.62.0 - probe function
+  Add av_probe_input_format2 to API, it allows ignoring probe
+  results below given score and returns the actual probe score.
+
[phone] - 3dd6180 - lavf 52.61.0 - metadata API
+  Add a flag for av_metadata_set2() to disable overwriting of
+  existing tags.
+
[phone] - 0fb49b5 - lavc 52.66.0
+  Add avcodec_get_edge_width().
+
[phone] - d103218 - lavc 52.65.0
+  Add avcodec_copy_context().
+
[phone] - 1a70d12 - lavf 52.60.0 - av_match_ext()
+  Make av_match_ext() public.
+
[phone] - 1149150 - lavu 50.14.0 - AVMediaType
+  Move AVMediaType enum from libavcodec to libavutil.
+
[phone] - 72415b2 - lavc 52.64.0 - AVMediaType
+  Define AVMediaType enum, and use it instead of enum CodecType, which
+  is deprecated and will be dropped at the next major bump.
+
[phone] - 8795823 - lavu 50.13.0 - av_strerror()
+  Implement av_strerror().
+
[phone] - e1484eb - lavc 52.60.0 - av_dct_init()
+  Support DCT-I and DST-I.
+
[phone] - b8819c8 - lavf 52.56.0 - AVFormatContext.start_time_realtime
+  Add AVFormatContext.start_time_realtime field.
+
[phone] - 5bb5c1d - lavfi 1.18.0 - AVFilterPicRef.pos
+  Add AVFilterPicRef.pos field.
+
[phone] - 60c144f - lavu 50.12.0 - error.h
+  Move error code definitions from libavcodec/avcodec.h to
+  the new public header libavutil/error.h.
+
[phone] - c709483 - lavc 52.56.0 - avfft.h
+  Add public FFT interface.
+
[phone] - ac6ef86 - lavu 50.11.0 - av_stristr()
+  Add av_stristr().
+
[phone] - 4b83fc0 - lavu 50.10.0 - av_tree_enumerate()
+  Add av_tree_enumerate().
+
[phone] - b687c1a - lavu 50.9.0 - av_compare_ts()
+  Add av_compare_ts().
+
[phone] - 3f3dc76 - lsws 0.10.0 - sws_getCoefficients()
+  Add sws_getCoefficients().
+
[phone] - ca76a11 - lavf 52.50.0 - metadata API
+  Add a list of generic tag names, change 'author' -> 'artist',
+  'year' -> 'date'.
+
[phone] - 80a07f6 - lavu 50.8.0 - av_get_pix_fmt()
+  Add av_get_pix_fmt().
+
[phone] - 01cc47d - lsws 0.9.0 - sws_scale()
+  Change constness attributes of sws_scale() parameters.
+
[phone] - 3fb8e77 - lavfi 1.15.0 - avfilter_graph_config_links()
+  Add a log_ctx parameter to avfilter_graph_config_links().
+
[phone] - 8e9767f - lsws 0.8.0 - sws_isSupported{In,Out}put()
+  Add sws_isSupportedInput() and sws_isSupportedOutput() functions.
+
[phone] - c1d662f - lavfi 1.14.0 - avfilter_add_colorspace()
+  Change the avfilter_add_colorspace() signature, make it accept an
+  (AVFilterFormats **) rather than an (AVFilterFormats *) as before.
+
[phone] - 4fd1f18 - lavfi 1.13.0 - avfilter_add_colorspace()
+  Add avfilter_add_colorspace().
+
[phone] - 8eb631f - lavf 52.46.0 - av_match_ext()
+  Add av_match_ext(), it should be used in place of match_ext().
+
[phone] - a1f547b - lavf 52.45.0 - av_guess_format()
+  Add av_guess_format(), it should be used in place of guess_format().
+
[phone] - a181981 - lavf 52.43.0 - metadata API
+  Add av_metadata_set2(), AV_METADATA_DONT_STRDUP_KEY and
+  AV_METADATA_DONT_STRDUP_VAL.
+
[phone] - 277c733 - lavu 50.7.0 - avstring.h API
+  Add av_d2str().
+
[phone] - 02b398e - lavc 52.42.0 - AVStream
+  Add avg_frame_rate.
+
[phone] - 3ba69a1 - lavu 50.6.0 - av_bmg_next()
+  Introduce the av_bmg_next() function.
+
[phone] - a13a543 - lavfi 1.12.0 - avfilter_draw_slice()
+  Add a slice_dir parameter to avfilter_draw_slice().
+
[phone] - 4cc3f6a - lavfi 1.11.0 - AVFilter
+  Remove the next field from AVFilter, this is not anymore required.
+
[phone] - 1433c4a - lavfi 1.10.0 - avfilter_next()
+  Introduce the avfilter_next() function.
+
[phone] - 86a60fa - lavfi 1.9.0 - avfilter_register()
+  Change the signature of avfilter_register() to make it return an
+  int. This is required since now the registration operation may fail.
+
[phone] - 74a0059 - lavu 50.5.0 - pixdesc.h API
+  Make the pixdesc.h API public.
+
[phone] - 243110f - lavfi 1.5.0 - AVFilter.next
+  Add a next field to AVFilter, this is used for simplifying the
+  registration and management of the registered filters.
+
[phone] - cccd292 - lavfi 1.4.1 - AVFilter.description
+  Add a description field to AVFilter.
+
[phone] - 6b5dc05 - lavfi 1.3.0 - avfilter_make_format_list()
+  Change the interface of avfilter_make_format_list() from
+  avfilter_make_format_list(int n, ...) to
+  avfilter_make_format_list(enum PixelFormat *pix_fmts).
+
[phone] - 0eb4ff9 - lavfi 1.0.0 - avfilter_get_video_buffer()
+  Make avfilter_get_video_buffer() recursive and add the w and h
+  parameters to it.
+
[phone] - 46c40e4 - lavfi 0.5.1 - AVFilterPic
+  Add w and h fields to AVFilterPic.
+
[phone] - 92400be - lavf 52.34.1 - AVFormatContext.packet_size
+  This is now an unsigned int instead of a signed int.
+
[phone] - a4276ba - lavc 52.32.0 - AVSubtitle.pts
+  Add a pts field to AVSubtitle which gives the subtitle packet pts
+  in AV_TIME_BASE. Some subtitle de-/encoders (e.g. XSUB) will
+  not work right without this.
+
[phone] - 8f3f2e0 - lavc 52.30.2 - AV_PKT_FLAG_KEY
+  PKT_FLAG_KEY has been deprecated and will be dropped at the next
+  major version. Use AV_PKT_FLAG_KEY instead.
+
[phone] - f988ce6 - lavc 52.30.0 - av_lockmgr_register()
+  av_lockmgr_register() can be used to register a callback function
+  that lavc (and in the future, libraries that depend on lavc) can use
+  to implement mutexes. The application should provide a callback function
+  that implements the AV_LOCK_* operations described in avcodec.h.
+  When the lock manager is registered, FFmpeg is guaranteed to behave
+  correctly in a multi-threaded application.
+
[phone] - ce1d9c8 - lavc 52.28.0 - av_free_packet()
+  av_free_packet() is no longer an inline function. It is now exported.
+
[phone] - 80d403f - lavc 52.25.0 - deprecate av_destruct_packet_nofree()
+  Please use NULL instead. This has been supported since r16506
+  (lavf > 52.23.1, lavc > 52.10.0).
+
[phone] - 7a00bba - lavc 52.23.0 - avcodec_decode_video/audio/subtitle
+  The old decoding functions are deprecated, all new code should use the
+  new functions avcodec_decode_video2(), avcodec_decode_audio3() and
+  avcodec_decode_subtitle2(). These new functions take an AVPacket *pkt
+  argument instead of a const uint8_t *buf / int buf_size pair.
+
[phone] - 7b09db3 - lavu 50.3.0 - av_fifo_space()
+  Introduce the av_fifo_space() function.
+
[phone] - fabd246 - lavc 52.23.0 - AVPacket
+  Move AVPacket declaration from libavformat/avformat.h to
+  libavcodec/avcodec.h.
+
[phone] - 6e08ca9 - lavu 50.2.0 - RGB32 pixel formats
+  Convert the pixel formats PIX_FMT_ARGB, PIX_FMT_RGBA, PIX_FMT_ABGR,
+  PIX_FMT_BGRA, which were defined as macros, into enum PixelFormat values.
+  Conversely PIX_FMT_RGB32, PIX_FMT_RGB32_1, PIX_FMT_BGR32 and
+  PIX_FMT_BGR32_1 are now macros.
+  avcodec_get_pix_fmt() now recognizes the "rgb32" and "bgr32" aliases.
+  Re-sort the enum PixelFormat list accordingly.
+  This change breaks API/ABI backward compatibility.
+
[phone] - f82674e - lavu 50.1.0 - PIX_FMT_RGB5X5 endian variants
+  Add the enum PixelFormat values:
+  PIX_FMT_RGB565BE, PIX_FMT_RGB565LE, PIX_FMT_RGB555BE, PIX_FMT_RGB555LE,
+  PIX_FMT_BGR565BE, PIX_FMT_BGR565LE, PIX_FMT_BGR555BE, PIX_FMT_BGR555LE.
+
[phone] - ee6624e - lavu 50.0.0  - av_random*
+  The Mersenne Twister PRNG implemented through the av_random* functions
+  was removed. Use the lagged Fibonacci PRNG through the av_lfg* functions
+  instead.
+
[phone] - 41dd680 - lavu 50.0.0  - AVFifoBuffer
+  av_fifo_init, av_fifo_read, av_fifo_write and av_fifo_realloc were dropped
+  and replaced by av_fifo_alloc, av_fifo_generic_read, av_fifo_generic_write
+  and av_fifo_realloc2.
+  In addition, the order of the function arguments of av_fifo_generic_read
+  was changed to match av_fifo_generic_write.
+  The AVFifoBuffer/struct AVFifoBuffer may only be used in an opaque way by
+  applications, they may not use sizeof() or directly access members.
+
[phone] - ec26457 - lavf 52.31.0 - Generic metadata API
+  Introduce a new metadata API (see av_metadata_get() and friends).
+  The old API is now deprecated and should not be used anymore. This especially
+  includes the following structure fields:
+    - AVFormatContext.title
+    - AVFormatContext.author
+    - AVFormatContext.copyright
+    - AVFormatContext.comment
+    - AVFormatContext.album
+    - AVFormatContext.year
+    - AVFormatContext.track
+    - AVFormatContext.genre
+    - AVStream.language
+    - AVStream.filename
+    - AVProgram.provider_name
+    - AVProgram.name
+    - AVChapter.title