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:   2013-12-xx

 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:

 2014-03-18 - e9c8a9a - lsws 2.5.102
   Make gray16 full-scale.
 

 2014-xx-xx - xxxxxxx - lavu 53.05.0 - frame.h
   Add av_frame_copy() for copying the frame data.
 

 2014-02-xx - xxxxxxx - lswr 0.18.100 - swresample.h
   Add swr_is_initialized() for checking whether a resample context is initialized.
 

 2014-02-xx - xxxxxxx - lavr 1.2.0 - avresample.h
   Add avresample_is_open() for checking whether a resample context is open.
 

 2014-xx-xx - xxxxxxx - lavu 53.04.0  - opt.h
   Add AV_OPT_FLAG_EXPORT and AV_OPT_FLAG_READONLY to mark options meant (only)
   for reading.
 

 2014-xx-xx - xxxxxxx - lavu 53.03.01 - opt.h
   Deprecate unused AV_OPT_FLAG_METADATA.
 

 2014-02-xx - xxxxxxx - lavd 55.10.100 - avdevice.h
   Add avdevice_list_devices() and avdevice_free_list_devices()
 

 2014-02-16 - db3c970 - lavf 55.33.100 - avio.h
   Add avio_find_protocol_name() to find out the name of the protocol that would
   be selected for a given URL.
 

 2014-02-xx - xxxxxxx - lavu 53.3.0 - frame.h
   Add AV_FRAME_DATA_DOWNMIX_INFO value to the AVFrameSideDataType enum and
   downmix_info.h API, which identify downmix-related metadata.
 

 2014-02-11 - 1b05ac2 - lavf 55.32.100 - avformat.h
   Add av_write_uncoded_frame() and av_interleaved_write_uncoded_frame().
 

 2014-02-04 - 3adb5f8 / d9ae103 - lavf 55.30.100 / 55.11.0 - avformat.h

   Add AVFormatContext.max_interleave_delta for controlling amount of buffering
   when interleaving.
 

 2014-02-02 - xxxxxxx - lavf 55.29.100 - avformat.h
   Add output_ts_offset muxing option to AVFormatContext.
 

 2014-01-27 - 102bd64 - lavd 55.7.100 - avdevice.h
                        lavf 55.28.100 - avformat.h

   Add avdevice_dev_to_app_control_message() function.

 
 2014-01-27 - 7151411 - lavd 55.6.100 - avdevice.h
                        lavf 55.27.100 - avformat.h

   Add avdevice_app_to_dev_control_message() function.

 2014-01-24 - 86bee79 - lavf 55.26.100 - avformat.h

   Add AVFormatContext option metadata_header_padding to allow control over the
   amount of padding added.

 2014-01-20 - eef74b2 / 93c553c - lavc 55.48.102 / 55.32.1 - avcodec.h

   Edges are not required anymore on video buffers allocated by get_buffer2()
   (i.e. as if the CODEC_FLAG_EMU_EDGE flag was always on). Deprecate
   CODEC_FLAG_EMU_EDGE and avcodec_get_edge_width().
 

 2014-01-19 - xxxxxxx - lavf 55.25.100 - avformat.h

   Add avformat_get_mov_video_tags() and avformat_get_mov_audio_tags().

 2014-01-19 - xxxxxxx - lavu 52.63.100 - rational.h
   Add av_make_q() function.
 

 2014-01-05 - 4cf4da9 / 5b4797a - lavu 52.62.100 / 53.2.0 - frame.h

   Add AV_FRAME_DATA_MATRIXENCODING value to the AVFrameSideDataType enum, which
   identifies AVMatrixEncoding data.
 

 2014-01-05 - 751385f / 5c437fb - lavu 52.61.100 / 53.1.0 - channel_layout.h

   Add values for various Dolby flags to the AVMatrixEncoding enum.
 

 2014-01-04 - xxxxxxx - lavu 52.60.100 - mathematics.h
   Add av_add_stable() function.
 

 2013-12-22 - xxxxxxx - lavu 52.59.100 - avstring.h
   Add av_strnlen() function.
 

 2013-12-xx - xxxxxxx - lavu 52.57.100 - opencl.h
   Add av_opencl_benchmark() function.

 2013-11-xx - xxxxxxx - lavu 52.56.100 - ffversion.h
   Moves version.h to libavutil/ffversion.h.
   Install ffversion.h and make it public.
 

 2013-12-11 - 29c83d2 / b9fb59d,409a143 / 9431356,44967ab / d7b3ee9 - lavc 55.45.101 / 55.28.1 - avcodec.h

   av_frame_alloc(), av_frame_unref() and av_frame_free() now can and should be
   used instead of avcodec_alloc_frame(), avcodec_get_frame_defaults() and
   avcodec_free_frame() respectively. The latter three functions are deprecated.
 

 2013-12-09 - 7a60348 / 7e244c6- - lavu 52.58.100 / 52.20.0 - frame.h

   Add AV_FRAME_DATA_STEREO3D value to the AVFrameSideDataType enum and
   stereo3d.h API, that identify codec-independent stereo3d information.
 

 2013-11-26 - 625b290 / 1eaac1d- - lavu 52.55.100 / 52.19.0 - frame.h

   Add AV_FRAME_DATA_A53_CC value to the AVFrameSideDataType enum, which
   identifies ATSC A53 Part 4 Closed Captions data.
 

 2013-11-XX - xxxxxxx - lavu 52.54.100 - avstring.h
   Add av_utf8_decode() function.
 

 2013-11-22 - fb7d70c - lavc 55.44.100 - avcodec.h
   Add HEVC profiles
 

 2013-11-xx - xxxxxxx - lavc 55.44.100 - avcodec.h
   Add av_packet_{un,}pack_dictionary()
   Add AV_PKT_METADATA_UPDATE side data type, used to transmit key/value
   strings between a stream and the application.
 

 2013-11-14 - 7c888ae / cce3e0a - lavu 52.53.100 / 52.18.0 - mem.h

   Move av_fast_malloc() and av_fast_realloc() for libavcodec to libavutil.
 

 2013-11-14 - b71e4d8 / 8941971 - lavc 55.43.100 / 55.27.0 - avcodec.h

   Deprecate AVCodecContext.error_rate, it is replaced by the 'error_rate'
   private option of the mpegvideo encoder family.
 

 2013-11-14 - 31c09b7 / 728c465 - lavc 55.26.0 - vdpau.h

   Add av_vdpau_get_profile().

   Add av_vdpau_alloc_context(). This function must from now on be
   used for allocating AVVDPAUContext.

 2013-11-04 - be41f21 / cd8f772 - lavc 55.41.100 / 55.25.0 - avcodec.h

                        lavu 52.51.100 - frame.h

   Add ITU-R BT.2020 and other not yet included values to color primaries,
   transfer characteristics and colorspaces.
 

 2013-11-04 - xxxxxxx - lavu 52.50.100 - avutil.h
   Add av_fopen_utf8()
 

 2013-10-31 - 78265fc / 28096e0 - lavu 52.49.100 / 52.17.0 - frame.h

   Add AVFrame.flags and AV_FRAME_FLAG_CORRUPT.
 

 2013-10-27 - xxxxxxx - lavc 55.39.100 - avcodec.h
   Add CODEC_CAP_DELAY support to avcodec_decode_subtitle2.
 

 2013-10-27 - xxxxxxx - lavu 52.48.100 - parseutils.h
   Add av_get_known_color_name().
 

 2013-10-17 - xxxxxxx - lavu 52.47.100 - opt.h
   Add AV_OPT_TYPE_CHANNEL_LAYOUT and channel layout option handlers
   av_opt_get_channel_layout() and av_opt_set_channel_layout().
 

 2013-10-xx - xxxxxxx -libswscale 2.5.101 - options.c
   Change default scaler to bicubic
 

 2013-10-03 - xxxxxxx - lavc 55.34.100 - avcodec.h
   Add av_codec_get_max_lowres()
 

 2013-10-02 - xxxxxxx - lavf 55.19.100 - avformat.h
   Add audio/video/subtitle AVCodec fields to AVFormatContext to force specific
   decoders
 

 2013-09-28 - 7381d31 / 0767bfd - lavfi 3.88.100 / 3.11.0 - avfilter.h

   Add AVFilterGraph.execute and AVFilterGraph.opaque for custom slice threading
   implementations.
 

 2013-09-21 - 85f8a3c / e208e6d - lavu 52.46.100 / 52.16.0 - pixfmt.h

   Add interleaved 4:2:2 8/10-bit formats AV_PIX_FMT_NV16 and
   AV_PIX_FMT_NV20.
 

 2013-09-16 - c74c3fb / 3feb3d6 - lavu 52.44.100 / 52.15.0 - mem.h

   Add av_reallocp.
 

 2013-09-04 - 3e1f507 - lavc 55.31.101 - avcodec.h

   avcodec_close() argument can be NULL.
 

 2013-09-04 - 36cd017 - lavf 55.16.101 - avformat.h

   avformat_close_input() argument can be NULL and point on NULL.
 

 2013-08-29 - e31db62 - lavf 55.15.100 - avformat.h
   Add av_format_get_probe_score().
 

 2013-08-15 - 1e0e193 - lsws 2.5.100 -

   Add a sws_dither AVOption, allowing to set the dither algorithm used
 

 2013-08-xx - xxxxxxx - lavc 55.27.100 - vdpau.h
   Add a render2 alternative to the render callback function.
 

 2013-08-xx - xxxxxxx - lavc 55.26.100 - vdpau.h
   Add allocation function for AVVDPAUContext, allowing
   to extend it in the future without breaking ABI/API.
 

 2013-08-10 - 67a580f / 5a9a9d4 - lavc 55.25.100 / 55.16.0 - avcodec.h

   Extend AVPacket API with av_packet_unref, av_packet_ref,
   av_packet_move_ref, av_packet_copy_props, av_packet_free_side_data.
 

 2013-08-05 - 9547e3e / f824535 - lavc 55.22.100 / 55.13.0 - avcodec.h

   Deprecate the bitstream-related members from struct AVVDPAUContext.
   The bistream buffers no longer need to be explicitly freed.
 

 2013-08-05 - 3b805dc / 549294f - lavc 55.21.100 / 55.12.0 - avcodec.h

   Deprecate the CODEC_CAP_HWACCEL_VDPAU codec capability. Use CODEC_CAP_HWACCEL
   and select the AV_PIX_FMT_VDPAU format with get_format() instead.
 

 2013-08-05 - 4ee0984 / a0ad5d0 - lavu 52.41.100 / 52.14.0 - pixfmt.h

   Deprecate AV_PIX_FMT_VDPAU_*. Use AV_PIX_FMT_VDPAU instead.
 

 2013-08-02 - 82fdfe8 / a8b1927 - lavc 55.20.100 / 55.11.0 - avcodec.h

   Add output_picture_number to AVCodecParserContext.
 

 2013-07-23 - abc8110 - lavc 55.19.100 - avcodec.h

   Add avcodec_chroma_pos_to_enum()
   Add avcodec_enum_to_chroma_pos()
 

 2013-07-03 - 838bd73 - lavfi 3.78.100 - avfilter.h

   Deprecate avfilter_graph_parse() in favor of the equivalent
   avfilter_graph_parse_ptr().
 

 2013-06-24 - af5f9c0 / 95d5246 - lavc 55.17.100 / 55.10.0 - avcodec.h

   Add MPEG-2 AAC profiles

 2013-06-25 - af5f9c0 / 95d5246 - lavf 55.10.100 - avformat.h

   Add AV_DISPOSITION_* flags to indicate text track kind.
 

 2013-06-15 - 99b8cd0 - lavu 52.36.100

   Add AVRIPEMD:
    av_ripemd_alloc()
    av_ripemd_init()
    av_ripemd_update()
    av_ripemd_final()
 

 2013-06-04 - 30b491f / fc962d4 - lavu 52.35.100 / 52.13.0 - mem.h

   Add av_realloc_array and av_reallocp_array
 

 2013-05-30 - 682b227 - lavu 52.35.100
   Add AVSHA512:
    av_sha512_alloc()
    av_sha512_init()
    av_sha512_update()
    av_sha512_final()
 

 2013-05-24 - 8d4e969 / 129bb23 - lavfi 3.10.0 / 3.70.100 - avfilter.h

   Add support for slice multithreading to lavfi. Filters supporting threading
   are marked with AVFILTER_FLAG_SLICE_THREADS.
   New fields AVFilterContext.thread_type, AVFilterGraph.thread_type and
   AVFilterGraph.nb_threads (accessible directly or through AVOptions) may be
   used to configure multithreading.
 

 2013-05-24 - fe40a9f / 2a6eaea - lavu 52.12.0 / 52.34.100 - cpu.h

   Add av_cpu_count() function for getting the number of logical CPUs.
 

 2013-05-24 - 0c25c39 / b493847 - lavc 55.7.0 / 55.12.100 - avcodec.h

   Add picture_structure to AVCodecParserContext.
 

 2013-05-17 - 3a751ea - lavu 52.33.100 - opt.h

   Add AV_OPT_TYPE_COLOR value to AVOptionType enum.
 

 2013-05-13 - e398416 - lavu 52.31.100 - mem.h

   Add av_dynarray2_add().
 

 2013-05-12 - 1776177 - lavfi 3.65.100

   Add AVFILTER_FLAG_SUPPORT_TIMELINE* filter flags.
 

 2013-04-19 - 380cfce - lavc 55.4.100

   Add AV_CODEC_PROP_TEXT_SUB property for text based subtitles codec.
 

 2013-04-18 - 7c1a002 - lavf 55.3.100

   The matroska demuxer can now output proper verbatim ASS packets. It will
   become the default starting lavf 56.0.100.
 

 2013-04-10 - af0d270 - lavu 25.26.100 - avutil.h,opt.h

   Add av_int_list_length()
   and av_opt_set_int_list().
 

 2013-03-30 - 5c73645 - lavu 52.24.100 - samplefmt.h

   Add av_samples_alloc_array_and_samples().
 

 2013-03-29 - ef7b6b4 - lavf 55.1.100 - avformat.h

   Add av_guess_frame_rate()
 

 2013-03-20 - 8d928a9 - lavu 52.22.100 - opt.h

   Add AV_OPT_TYPE_DURATION value to AVOptionType enum.
 

 2013-03-17 - 7aa9af5 - lavu 52.20.100 - opt.h

   Add AV_OPT_TYPE_VIDEO_RATE value to AVOptionType enum.
 

 2013-03-07 - 9767ec6 - lavu 52.18.100 - avstring.h,bprint.h

   Add av_escape() and av_bprint_escape() API.
 

 2013-02-24 - b59cd08 - lavfi 3.41.100 - buffersink.h

   Add sample_rates field to AVABufferSinkParams.
 

 2013-01-17 - a1a707f - lavf 54.61.100
   Add av_codec_get_tag2().
 

 2013-01-01 - 2eb2e17 - lavfi 3.34.100
   Add avfilter_get_audio_buffer_ref_from_arrays_channels.
 

 2012-12-20 - 34de47aa - lavfi 3.29.100 - avfilter.h

   Add AVFilterLink.channels, avfilter_link_get_channels()
   and avfilter_ref_get_channels().
 

 2012-12-15 - 96d815fc - lavc 54.80.100 - avcodec.h

   Add pkt_size field to AVFrame.
 

 2012-11-25 - 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
 

 2012-11-17 - 4cd74c81 - lavu 52.8.100 - bprint.h

   Add av_bprint_strftime().
 

 2012-11-15 - 92648107 - lavu 52.7.100 - opt.h

   Add av_opt_get_key_value().
 

 2012-11-13 - 79456652 - lavfi 3.23.100 - avfilter.h

   Add channels field to AVFilterBufferRefAudioProps.
 

 2012-11-03 - 481fdeee - lavu 52.3.100 - opt.h

   Add AV_OPT_TYPE_SAMPLE_FMT value to AVOptionType enum.
 

 2012-10-21 - 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).
 

 2012-09-27 - a70b493 - lavd 54.3.100 - version.h

   Add LIBAVDEVICE_IDENT symbol.
 

 2012-09-27 - a70b493 - lavfi 3.18.100 - version.h

   Add LIBAVFILTER_IDENT symbol.
 

 2012-09-27 - a70b493 - libswr 0.16.100 - version.h

   Add LIBSWRESAMPLE_VERSION, LIBSWRESAMPLE_BUILD
   and LIBSWRESAMPLE_IDENT symbols.
 

 2012-09-06 - 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.
 

 2012-08-25 - 2626cc4 - lavf 54.28.100
   Matroska demuxer now identifies SRT subtitles as AV_CODEC_ID_SUBRIP instead
   of AV_CODEC_ID_TEXT.
 

 2012-08-13 - 5c0d8bc - lavfi 3.8.100 - avfilter.h

   Add avfilter_get_class() function, and priv_class field to AVFilter
   struct.
 

 2012-08-12 - a25346e - lavu 51.69.100 - opt.h

   Add AV_OPT_FLAG_FILTERING_PARAM symbol in opt.h.
 

 2012-07-31 - 23fc4dd - lavc 54.46.100

   Add channels field to AVFrame.
 

 2012-07-30 - f893904 - lavu 51.66.100

   Add av_get_channel_description()
   and av_get_standard_channel_layout() functions.
 

 2012-07-21 - 016a472 - lavc 54.43.100

   Add decode_error_flags field to AVFrame.
 

 2012-07-20 - b062936 - lavf 54.18.100

   Add avformat_match_stream_specifier() function.
 

 2012-07-14 - f49ec1b - lavc 54.38.100 - avcodec.h

   Add metadata to AVFrame, and the accessor functions
   av_frame_get_metadata() and av_frame_set_metadata().
 

 2012-07-10 - 0e003d8 - lavc 54.33.100

   Add av_fast_padded_mallocz().
 

 2012-07-10 - 21d5609 - lavfi 3.2.0 - avfilter.h

   Add init_opaque() callback to AVFilter struct.
 

 2012-06-26 - 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()
 

 2012-06-24 - c41899a - lavu 51.62.100 - version.h

   version moved from avutil.h to version.h
 

 2012-04-11 - 359abb1 - lavu 51.58.100 - error.h

   Add av_make_error_string() and av_err2str() utilities to
   libavutil/error.h.
 

 2012-06-05 - 62b39d4 - lavc 54.24.100

   Add pkt_duration field to AVFrame.
 

 2012-05-24 - f2ee065 - lavu 51.54.100

   Move AVPALETTE_SIZE and AVPALETTE_COUNT macros from
   libavcodec/avcodec.h to libavutil/pixfmt.h.
 

 2012-05-14 - 94a9ac1 - lavf 54.5.100

   Add av_guess_sample_aspect_ratio() function.
 

 2012-04-20 - 65fa7bc - lavfi 2.70.100

   Add avfilter_unref_bufferp() to avfilter.h.
 

 2012-04-13 - 162e400 - lavfi 2.68.100

   Install libavfilter/asrc_abuffer.h public header.
 

 2012-03-26 - a67d9cf - lavfi 2.66.100

   Add avfilter_fill_frame_from_{audio_,}buffer_ref() functions.
 

 2013-05-15 - ff46809 / e6c4ac7 - lavu 52.32.100 / 52.11.0 - pixdesc.h

   Replace PIX_FMT_* flags with AV_PIX_FMT_FLAG_*.
 

 2013-04-03 - 6fc58a8 / 507b1e4 - lavc 55.7.100 / 55.4.0 - avcodec.h

   Add field_order to AVCodecParserContext.
 

 2013-04-19 - f4b05cd / 5e83d9a - lavc 55.5.100 / 55.2.0 - avcodec.h

   Add CODEC_FLAG_UNALIGNED to allow decoders to produce unaligned output.
 

 2013-04-11 - lavfi 3.53.100 / 3.8.0
   231fd44 / 38f0c07 - Move all content from avfiltergraph.h to avfilter.h. Deprecate

             avfilterhraph.h, user applications should include just avfilter.h

   86070b8 / bc1a985 - Add avfilter_graph_alloc_filter(), deprecate avfilter_open() and

             avfilter_graph_add_filter().

   4fde705 / 1113672 - Add AVFilterContext.graph pointing to the AVFilterGraph that contains the

             filter.

   710b0aa / 48a5ada - Add avfilter_init_str(), deprecate avfilter_init_filter().
   46de9ba / 1ba95a9 - Add avfilter_init_dict().
   16fc24b / 7cdd737 - Add AVFilter.flags field and AVFILTER_FLAG_DYNAMIC_{INPUTS,OUTPUTS} flags.
   f4db6bf / 7e8fe4b - Add avfilter_pad_count() for counting filter inputs/outputs.
   835cc0f / fa2a34c - Add avfilter_next(), deprecate av_filter_next().

             Deprecate avfilter_uninit().
 

 2013-04-09 - lavfi 3.51.100 / 3.7.0 - avfilter.h
   0594ef0 / b439c99 - Add AVFilter.priv_class for exporting filter options through the

             AVOptions API in the similar way private options work in lavc and lavf.

   44d4488 / 8114c10 - Add avfilter_get_class().

   Switch all filters to use AVOptions.
 

 2013-03-19 - 17ebef2 / 2c328a9 - lavu 52.20.100 / 52.9.0 - pixdesc.h

   Add av_pix_fmt_count_planes() function for counting planes in a pixel format.
 

 2013-03-16 - ecade98 / 42c7c61 - lavfi 3.47.100 / 3.6.0

   Add AVFilterGraph.nb_filters, deprecate AVFilterGraph.filter_count.
 

 2013-03-08 - Reference counted buffers - lavu 52.8.0, lavc 55.0.100 / 55.0.0, lavf 55.0.100 / 55.0.0,
 lavd 54.4.100 / 54.0.0, lavfi 3.5.0
   36099df / 8e401db, 532f31a / 1cec062 - add a new API for reference counted buffers and buffer

                      pools (new header libavutil/buffer.h).

   2653e12 / 1afddbe - 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.

   c4e8821 / 7ecc2d4 - 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.

   80e9e63 / 759001c - 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.

   a05a44e / 7e35037 - 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.
 

 2013-03-17 - 6c17ff8 / 12c5c1d - lavu 52.19.100 / 52.8.0 - avstring.h

   Add av_isdigit, av_isgraph, av_isspace, av_isxdigit.
 

 2013-02-23 - 71cf094 / 9f12235 - lavfi 3.40.100 / 3.4.0 - avfiltergraph.h

   Add resample_lavr_opts to AVFilterGraph for setting libavresample options
   for auto-inserted resample filters.
 

 2013-01-25 - e7e14bc / 38c1466 - lavu 52.17.100 / 52.7.0 - dict.h

   Add av_dict_parse_string() to set multiple key/value pairs at once from a
   string.
 

 2013-01-25 - 25be630 / b85a5e8 - lavu 52.16.100 / 52.6.0 - avstring.h

   Add av_strnstr()
 

 2013-01-15 - e7e0186 / 8ee288d - lavu 52.15.100 / 52.5.0 - hmac.h

   Add AVHMAC.
 

 2013-01-13 - 8ee7b38 / 44e065d - lavc 54.87.100 / 54.36.0 - vdpau.h

   Add AVVDPAUContext struct for VDPAU hardware-accelerated decoding.
 

 2013-01-12 - dae382b / 169fb94 - lavu 52.14.100 / 52.4.0 - pixdesc.h

   Add AV_PIX_FMT_VDPAU flag.
 

 2013-01-07 - 249fca3 / 074a00d - lavr 1.1.0

   Add avresample_set_channel_mapping() for input channel reordering,
   duplication, and silencing.
 

 2012-12-29 - 2ce43b3 / d8fd06c - lavu 52.13.100 / 52.3.0 - avstring.h

   Add av_basename() and av_dirname().
 

 2012-11-11 - 03b0787 / 5980f5d - lavu 52.6.100 / 52.2.0 - audioconvert.h

   Rename audioconvert.h to channel_layout.h. audioconvert.h is now deprecated.
 

 2012-11-05 - 7d26be6 / dfde8a3 - lavu 52.5.100 / 52.1.0 - intmath.h

   Add av_ctz() for trailing zero bit count
 

 2012-10-21 - e3a91c5 / a893655 - lavu 51.77.100 / 51.45.0 - error.h

   Add AVERROR_EXPERIMENTAL
 

 2012-10-12 - 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.
 

 2012-10-11 - 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,
 

 2012-10-10 - de31814 / b522000 - lavf 54.32.100 / 54.18.0 - avio.h

   Add avio_closep to complement avio_close.
 

 2012-10-08 - 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.
 

 2012-10-05 - 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.
 

 2012-09-24 - 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.
 

 2012-09-12 - e3e09f2 / 8919fee - lavu 51.73.100 / 51.41.0 - audioconvert.h

   Added AV_CH_LOW_FREQUENCY_2 channel mask value.
 

 2012-09-04 - 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.
 

 2012-08-30 - 98298eb / a231832 - lavc 54.54.101 / 54.26.1 - avcodec.h

   Add codec descriptor properties AV_CODEC_PROP_LOSSY and
   AV_CODEC_PROP_LOSSLESS.
 

 2012-08-18 - 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().

 2012-08-08 - f5f3684 / 987170c - lavu 51.68.100 / 51.38.0 - dict.h

   Add av_dict_count().
 

 2012-08-07 - 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.

 2012-08-03 - 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.
 

 2012-07-29 - 7c26761 / 681ed00 - lavf 54.22.100 / 54.13.0 - avformat.h

   Add AVFMT_FLAG_NOBUFFER for low latency use cases.
 

 2012-07-10 - fbe0245 / f3e5e6f - lavu 51.65.100 / 51.37.0

   Add av_malloc_array() and av_mallocz_array()
 

 2012-06-22 - e847f41 / d3d3a32 - lavu 51.61.100 / 51.34.0

   Add av_usleep()
 

 2012-06-20 - 4da42eb / ae0a301 - lavu 51.60.100 / 51.33.0

   Move av_gettime() to libavutil, add libavutil/time.h
 

 2012-06-09 - 82edf67 / 3971be0 - lavr 0.0.3

   Add a parameter to avresample_build_matrix() for Dolby/DPLII downmixing.
 

 2012-06-12 - c7b9eab / 9baeff9 - lavfi 2.79.100 / 2.23.0 - avfilter.h

   Add AVFilterContext.nb_inputs/outputs. Deprecate
   AVFilterContext.input/output_count.
 

 2012-06-12 - 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.
 

 2012-06-12 - 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().
 

 2012-05-25 - 53ce990 / 154486f - lavu 51.55.100 / 51.31.0 - opt.h

   Add av_opt_set_bin()
 

 2012-05-15 - 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()

 2012-05-09 - lavu 51.53.100 / 51.30.0 - samplefmt.h
   61930bd / 142e740 - add av_samples_copy()
   61930bd / 6d7f617 - add av_samples_set_silence()

 2012-05-09 - 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).
 

 2012-05-07 - 653d117 / 828bd08 - lavc 54.20.100 / 54.13.0 - avcodec.h

   Add sample_rate and channel_layout fields to AVFrame.
 

 2012-05-01 - 2330eb1 / 4010d72 - lavr 0.0.1

   Change AV_MIX_COEFF_TYPE_Q6 to AV_MIX_COEFF_TYPE_Q8.
 

 2012-04-25 - e890b68 / 3527a73 - lavu 51.48.100 / 51.29.0 - cpu.h

   Add av_parse_cpu_flags()
 

 2012-04-24 - 3ead79e / c8af852 - lavr 0.0.0

   Add libavresample audio conversion library
 

 2012-04-20 - 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()
 

 2012-04-14 - lavfi 2.70.100 / 2.16.0 - avfiltergraph.h
   7432bcf / d7bcc71 Add avfilter_graph_parse2().

 2012-04-08 - 6bfb304 / 4d693b0 - lavu 51.46.100 / 51.27.0 - samplefmt.h

   Add av_get_packed_sample_fmt() and av_get_planar_sample_fmt()
 

 2012-03-21 - b75c67d - lavu 51.43.100

   Add bprint.h for bprint API.
 

 2012-02-21 - 9cbf17e - lavc 54.4.100

   Add av_get_pcm_codec() function.
 

 2012-02-16 - 560b224 - libswr 0.7.100

   Add swr_set_matrix() function.
 

 2012-02-09 - c28e7af - lavu 51.39.100

   Add a new installed header libavutil/timestamp.h with timestamp
   utilities.
 

 2012-02-06 - 70ffda3 - lavu 51.38.100

   Add av_parse_ratio() function to parseutils.h.
 

 2012-02-06 - 70ffda3 - lavu 51.38.100

   Add AV_LOG_MAX_OFFSET macro to log.h.
 

 2012-02-02 - 0eaa123 - lavu 51.37.100

   Add public timecode helpers.
 

 2012-01-24 - 0c3577b - lavfi 2.60.100

   Add avfilter_graph_dump.
 

 2012-03-20 - 0ebd836 / 3c90cc2 - lavfo 54.2.0

   Deprecate av_read_packet(), use av_read_frame() with
   AVFMT_FLAG_NOPARSE | AVFMT_FLAG_NOFILLIN in AVFormatContext.flags
 

 2012-03-05 - lavc 54.10.100 / 54.8.0
   f095391 / 6699d07 Add av_get_exact_bits_per_sample()
   f095391 / 9524cf7 Add av_get_audio_frame_duration()

 2012-03-04 - 2af8f2c / 44fe77b - lavc 54.8.100 / 54.7.0 - avcodec.h

   Add av_codec_is_encoder/decoder().
 

 2012-03-01 - 1eb7f39 / 442c132 - lavc 54.5.100 / 54.3.0 - avcodec.h

   Add av_packet_shrink_side_data.
 

 2012-02-29 - 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.
 

 2012-02-25 - 305e4b3 / c9bca80 - lavu 51.41.100 / 51.24.0 - error.h

   Add AVERROR_UNKNOWN

   NOTE: this was backported to 0.8

 2012-02-20 - eadd426 / e9cda85 - lavc 54.2.100 / 54.2.0

   Add duration field to AVCodecParserContext
 

 2012-02-20 - eadd426 / 0b42a93 - lavu 51.40.100 / 51.23.1 - mathematics.h

   Add av_rescale_q_rnd()
 

 2012-02-08 - f2b20b7 / 38d5533 - lavu 51.38.101 / 51.22.1 - pixdesc.h

   Add PIX_FMT_PSEUDOPAL flag.
 

 2012-02-08 - f2b20b7 / 52f82a1 - lavc 54.2.100 / 54.1.0

   Add avcodec_encode_video2() and deprecate avcodec_encode_video().
 

 2012-02-01 - 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.
 

 2012-01-31 - 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

 2012-01-31 - a369a6b / af08d9a - lavc 54.1.0

   Add avcodec_is_open() function.

   NOTE: this was backported to 0.8

 2012-01-30 - 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

 2012-01-25 - 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).
 

 2012-01-15 - 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().
 

 2012-01-12 - b18e17e / 3167dc9 - lavfi 2.59.100 / 2.15.0

   Add a new installed header -- libavfilter/version.h -- with version macros.
 

 2011-12-08 - a502939 - lavfi 2.52.0
   Add av_buffersink_poll_frame() to buffersink.h.
 

 2011-12-08 - 26c6fec - lavu 51.31.0

   Add av_log_format_line.
 

 2011-12-03 - 976b095 - lavu 51.30.0

   Add AVERROR_BUG.
 

 2011-11-24 - 573ffbb - lavu 51.28.1

   Add av_get_alt_sample_fmt() to samplefmt.h.
 

 2011-11-03 - 96949da - lavu 51.23.0

   Add av_strcasecmp() and av_strncasecmp() to avstring.h.
 

 2011-10-20 - b35e9e1 - lavu 51.22.0
   Add av_strtok() to avstring.h.
 

 2012-01-03 - ad1c8dd / b73ec05 - lavu 51.34.100 / 51.21.0

   Add av_popcount64

 2011-12-18 - 7c29313 / 8400b12 - lavc 53.46.1 / 53.28.1

   Deprecate AVFrame.age. The field is unused.
 

 2011-12-12 - 8bc7fe4 / 5266045 - lavf 53.25.0 / 53.17.0

   Add avformat_close_input().

   Deprecate av_close_input_file() and av_close_input_stream().
 

 2011-12-02 - 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().
 

 2011-12-04 - 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.
 

 2011-11-23 - 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.
 

 2011-11-23 - 8e576d5 / 8889cc4 - lavu 51.27.0 / 51.17.0

   Add planar sample formats and av_sample_fmt_is_planar() to samplefmt.h.
 

 2011-11-19 - 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
 

 2011-11-16 - 8709ba9 / 6270671 - lavu 51.26.0 / 51.16.0

   Add av_timegm()
 

 2011-11-13 - 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.
 

 2011-11-06 - 13b7781 / ba04ecf - lavu 51.24.0 / 51.14.0

   Add av_strcasecmp() and av_strncasecmp() to avstring.h.
 

 2011-11-06 - 13b7781 / 07b172f - lavu 51.24.0 / 51.13.0

   Add av_toupper()/av_tolower()
 

 2011-11-05 - d8cab5c / b6d08f4 - lavf 53.19.0 / 53.13.0

   Add avformat_network_init()/avformat_network_deinit()

 2011-10-27 - 6faf0a2 / 512557b - lavc 53.24.0 / 53.15.0

   Remove avcodec_parse_frame.
   Deprecate AVCodecContext.parse_only and CODEC_CAP_PARSE_ONLY.
 

 2011-10-19 - d049257 / 569129a - lavf 53.17.0 / 53.10.0

   Add avformat_new_stream(). Deprecate av_new_stream().
 

 2011-10-13 - 91eb1b1 / b631fba - lavf 53.16.0 / 53.9.0

   Add AVFMT_NO_BYTE_SEEK AVInputFormat flag.
 

 2011-10-12 - 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()
 

 2011-09-22 - a70e787 - lavu 51.17.0

   Add av_x_if_null().
 

 2011-09-18 - 645cebb - lavc 53.16.0

   Add showall flag2
 

 2011-09-16 - ea8de10 - lavfi 2.42.0

   Add avfilter_all_channel_layouts.
 

 2011-09-16 - 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
 

 2011-09-12 - 4381bdd - lavfi 2.40.0

   Change AVFilterBufferRefAudioProps.sample_rate type from uint32_t to int.
 

 2011-09-12 - 2c03174 - lavfi 2.40.0

   Simplify signature for avfilter_get_audio_buffer(), make it
   consistent with avfilter_get_video_buffer().
 

 2011-09-06 - 4f7dfe1 - lavfi 2.39.0

   Rename libavfilter/vsink_buffer.h to libavfilter/buffersink.h.
 

 2011-09-06 - 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.
 

 2011-09-04 - 61e2e29 - lavu 51.16.0

   Add av_asprintf().
 

 2011-08-22 - dacd827 - lavf 53.10.0

   Add av_find_program_from_stream().
 

 2011-08-20 - 69e2c1a - lavu 51.13.0

   Add av_get_media_type_string().
 

 2011-09-03 - 1889c67 / fb4ca26 - lavc 53.13.0

                        lavf 53.11.0

                        lsws  2.1.0
   Add {avcodec,avformat,sws}_get_class().
 

 2011-08-03 - 1889c67 / c11fb82 - lavu 51.15.0

   Add AV_OPT_SEARCH_FAKE_OBJ flag for av_opt_find() function.
 

 2011-08-14 - 323b930 - lavu 51.12.0

   Add av_fifo_peek2(), deprecate av_fifo_peek().
 

 2011-08-26 - 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.

 2011-08-16 - 27fbe31 / 48f9e45 - lavf 53.11.0 / 53.8.0

   Add avformat_query_codec().
 

 2011-08-16 - 27fbe31 / bca06e7 - lavc 53.11.0

   Add avcodec_get_type().
 

 2011-08-06 - 0cb233c / 2f63440 - lavf 53.7.0

   Add error_recognition to AVFormatContext.
 

 2011-08-02 - 1d186e9 / 9d39cbf - lavc 53.9.1

   Add AV_PKT_FLAG_CORRUPT AVPacket flag.
 

 2011-07-16 - 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()
 

 2011-07-10 - 3602ad7 / a67c061 - lavf 53.6.0

   Add avformat_find_stream_info(), deprecate av_find_stream_info().

   NOTE: this was backported to 0.7

 2011-07-10 - 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().

 2011-07-01 - b442ca6 - lavf 53.5.0 - avformat.h
   Add function av_get_output_timestamp().
 

 2011-06-28 - 5129336 - lavu 51.11.0 - avutil.h
   Define the AV_PICTURE_TYPE_NONE value in AVPictureType enum.
 

 2011-06-19 - 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()
 

 2011-06-19 - 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.
 

 2011-06-19 - 44f669e - lavfi 2.21.0 - vsink_buffer.h

   Add video sink buffer and vsink_buffer.h public header.
 

 2011-06-12 - 9fdf772 - lavfi 2.18.0 - avcodec.h

   Add avfilter_get_video_buffer_ref_from_frame() function in
   libavfilter/avcodec.h.
 

 2011-06-12 - c535494 - lavfi 2.17.0 - avfiltergraph.h

   Add avfilter_inout_alloc() and avfilter_inout_free() functions.
 

 2011-06-12 - 6119b23 - lavfi 2.16.0 - avfilter_graph_parse()

   Change avfilter_graph_parse() signature.
 

 2011-06-23 - 686959e / 67e9ae1 - lavu 51.10.0 / 51.8.0 - attributes.h

   Add av_printf_format().
 

 2011-06-16 - 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.
 

 2011-06-16 - 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.
 

 2011-06-10 - 45fb647 / cb7c11c - lavu 51.6.0 - opt.h

   Add av_opt_flag_is_set().
 

 2011-06-10 - c381960 - lavfi 2.15.0 - avfilter_get_audio_buffer_ref_from_arrays

   Add avfilter_get_audio_buffer_ref_from_arrays() to avfilter.h.
 

 2011-06-09 - 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_*.
 

 2011-06-07 - 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().
 

 2011-06-05 - f956924 / b39b062 - lavu 51.8.0 - opt.h

   Add av_opt_free convenience function.

 2011-06-06 - 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.
 

 2011-06-06 - 0bc2cca - lavu 51.6.0 - av_samples_alloc()

   Switch nb_channels and nb_samples parameters order in
   av_samples_alloc().
 

 2011-06-06 - e1c7414 - lavu 51.5.0 - av_samples_*

   Change the data layout created by av_samples_fill_arrays() and
   av_samples_alloc().
 

 2011-06-06 - 27bcf55 - lavfi 2.13.0 - vsrc_buffer.h

   Make av_vsrc_buffer_add_video_buffer_ref() accepts an additional
   flags parameter in input.
 

 2011-06-03 - e977ca2 - lavfi 2.12.0 - avfilter_link_free()

   Add avfilter_link_free() function.
 

 2011-06-02 - 5ad38d9 - lavu 51.4.0 - av_force_cpu_flags()

   Add av_cpu_flags() in libavutil/cpu.h.
 

 2011-05-28 - 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.
 

 2011-05-25 - 39e4206 / 30315a8 - lavf 53.3.0 - avformat.h

   Add fps_probe_size to AVFormatContext.
 

 2011-05-22 - 5ecdfd0 - lavf 53.2.0 - avformat.h

   Introduce avformat_alloc_output_context2() and deprecate
   avformat_alloc_output_context().
 

 2011-05-22 - 83db719 - lavfi 2.10.0 - vsrc_buffer.h

   Make libavfilter/vsrc_buffer.h public.
 

 2011-05-19 - c000a9f - lavfi 2.8.0 - avcodec.h

   Add av_vsrc_buffer_add_frame() to libavfilter/avcodec.h.
 

 2011-05-14 - 9fdf772 - lavfi 2.6.0 - avcodec.h

   Add avfilter_get_video_buffer_ref_from_frame() to libavfilter/avcodec.h.
 

 2011-05-18 - 75a37b5 / 64150ff - lavc 53.7.0 - AVCodecContext.request_sample_fmt

   Add request_sample_fmt field to AVCodecContext.
 

 2011-05-10 - 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.
 

 2011-05-07 - 9fdf772 - lavfi 2.5.0 - avcodec.h

   Add libavfilter/avcodec.h header and avfilter_copy_frame_props()
   function.
 

 2011-05-07 - 18ded93 - lavc 53.5.0 - AVFrame

   Add format field to AVFrame.
 

 2011-05-07 - 22333a6 - lavc 53.4.0 - AVFrame

   Add width and height fields to AVFrame.
 

 2011-05-01 - 35fe66a - lavfi 2.4.0 - avfilter.h

   Rename AVFilterBufferRefVideoProps.pixel_aspect to
   sample_aspect_ratio.
 

 2011-05-01 - 77e9dee - lavc 53.3.0 - AVFrame

   Add a sample_aspect_ratio field to AVFrame.
 

 2011-05-01 - 1ba5727 - lavc 53.2.0 - AVFrame

   Add a pkt_pos field to AVFrame.
 

 2011-04-29 - 35ceaa7 - lavu 51.2.0 - mem.h

   Add av_dynarray_add function for adding
   an element to a dynamic array.
 

 2011-04-26 - 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.
 

 2011-04-26 - d7e5aeb / 10d3940 - lavfi 2.3.0 - avfilter.h

   Add pict_type and key_frame fields to AVFilterBufferRefVideo.
 

 2011-04-26 - d7e5aeb / 7a11c82 - lavfi 2.2.0 - vsrc_buffer

   Add sample_aspect_ratio fields to vsrc_buffer arguments
 

 2011-04-21 - 8772156 / 94f7451 - lavc 53.1.0 - avcodec.h

   Add CODEC_CAP_SLICE_THREADS for codecs supporting sliced threading.
 

 2011-04-15 - 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

 2011-04-12 - 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

 2011-04-08 - 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

 2011-04-03 - 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
 

 2011-03-25 - 27ef7b1 / 34b47d7 - lavc 52.115.0 - AVCodecContext.audio_service_type

   Add audio_service_type field to AVCodecContext.
 

 2011-03-17 - e309fdc - lavu 50.40.0 - pixfmt.h

   Add PIX_FMT_BGR48LE and PIX_FMT_BGR48BE pixel formats
 

 2011-03-02 - 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.
 

 2011-02-20 - 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.
 

 2011-02-16 - 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.

 2011-02-15 - lavu 52.38.0 - merge libavcore
   libavcore is merged back completely into libavutil
 

 2011-02-10 - 55bad0c - lavc 52.113.0 - vbv_delay
   Add vbv_delay field to AVCodecContext
 

 2011-02-14 - 24a83bd - lavf 52.100.0 - AV_DISPOSITION_CLEAN_EFFECTS
   Add AV_DISPOSITION_CLEAN_EFFECTS disposition flag.
 

 2011-02-14 - 910b5b8 - lavfi 1.76.0 - AVFilterLink sample_aspect_ratio
   Add sample_aspect_ratio field to AVFilterLink.
 

 2011-02-10 - 12c14cd - lavf 52.99.0 - AVStream.disposition
   Add AV_DISPOSITION_HEARING_IMPAIRED and AV_DISPOSITION_VISUAL_IMPAIRED.
 

 2011-02-09 - c0b102c - lavc 52.112.0 - avcodec_thread_init()

   Deprecate avcodec_thread_init()/avcodec_thread_free() use; instead
   set thread_count before calling avcodec_open.
 

 2011-02-09 - 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.
 

 2011-02-08 - 3940caa - lavf 52.98.0 - av_probe_input_buffer

   Add av_probe_input_buffer() to avformat.h for probing format from a
   ByteIOContext.
 

 2011-02-06 - fe174fc - lavf 52.97.0 - avio.h

   Add flag for non-blocking protocols: URL_FLAG_NONBLOCK
 

 2011-02-04 - f124b08 - lavf 52.96.0 - avformat_free_context()
   Add avformat_free_context() in avformat.h.
 

 2011-02-03 - f5b82f4 - lavc 52.109.0 - add CODEC_ID_PRORES
   Add CODEC_ID_PRORES to avcodec.h.
 

 2011-02-03 - fe9a3fb - lavc 52.109.0 - H.264 profile defines
   Add defines for H.264 * Constrained Baseline and Intra profiles
 

 2011-02-02 - 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*.
 
 2011-02-02 - dfd2a00 - lavu 50.37.0 - log.h
   Make av_dlog public.
 

 2011-01-31 - 7b3ea55 - lavfi 1.76.0 - vsrc_buffer

   Add sample_aspect_ratio fields to vsrc_buffer arguments
 

 2011-01-31 - 910b5b8 - lavfi 1.75.0 - AVFilterLink sample_aspect_ratio

   Add sample_aspect_ratio field to AVFilterLink.
 

 2011-01-15 - a242ac3 - lavfi 1.74.0 - AVFilterBufferRefAudioProps

   Rename AVFilterBufferRefAudioProps.samples_nb to nb_samples.
 

 2011-01-14 - 7f88a5b - lavf 52.93.0 - av_metadata_copy()

   Add av_metadata_copy() in avformat.h.
 

 2011-01-07 - 81c623f - lavc 52.107.0 - deprecate reordered_opaque

   Deprecate reordered_opaque in favor of pkt_pts/dts.
 

 2011-01-07 - 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.
 

 2011-01-07 - 393cbb9 - lavc 52.105.0 - pkt_pts

   Add pkt_pts to AVFrame.
 

 2011-01-07 - 060ec0a - lavc 52.104.0 - av_get_profile_name()

   Add av_get_profile_name to libavcodec/avcodec.h.
 

 2010-12-27 - 0ccabee - lavfi 1.71.0 - AV_PERM_NEG_LINESIZES

   Add AV_PERM_NEG_LINESIZES in avfilter.h.
 

 2010-12-27 - 9128ae0 - lavf 52.91.0 - av_find_best_stream()

   Add av_find_best_stream to libavformat/avformat.h.
 

 2010-12-27 - 107a7e3 - lavf 52.90.0

   Add AVFMT_NOSTREAMS flag for formats with no streams,
   like e.g. text metadata.
 

 2010-12-22 - 0328b9e - lavu 50.36.0 - file.h

   Add functions av_file_map() and av_file_unmap() in file.h.
 

 2010-12-19 - 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
 

 2010-12-09 - 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.
 

 2010-12-04 - 16cfc96 - lavc 52.98.0 - CODEC_CAP_NEG_LINESIZES

   Add CODEC_CAP_NEG_LINESIZES codec capability flag in avcodec.h.
 

 2010-12-04 - 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().
 

 2010-12-04 - 4da12e3 - lavcore 0.15.0 - av_image_alloc()

   Add av_image_alloc() to libavcore/imgutils.h.
 

 2010-12-02 - 037be76 - lavfi 1.67.0 - avfilter_graph_create_filter()

   Add function avfilter_graph_create_filter() in avfiltergraph.h.
 

 2010-11-25 - 4723bc2 - lavfi 1.65.0 - avfilter_get_video_buffer_ref_from_arrays()

   Add function avfilter_get_video_buffer_ref_from_arrays() in
   avfilter.h.

 2010-11-21 - 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.
 

 2010-11-21 - 6bfc268 - lavf 52.85.0 - avformat.h

   Add av_append_packet().
 

 2010-11-21 - a08d918 - lavc 52.97.0 - avcodec.h

   Add av_grow_packet().
 

 2010-11-17 - 0985e1a - lavcore 0.13.0 - parseutils.h

   Add av_parse_color() declared in libavcore/parseutils.h.
 

 2010-11-13 - cb2c971 - lavc 52.95.0 - AVCodecContext

   Add AVCodecContext.subtitle_header and AVCodecContext.subtitle_header_size
   fields.
 

 2010-11-13 - 5aaea02 - lavfi 1.62.0 - avfiltergraph.h

   Make avfiltergraph.h public.
 

 2010-11-13 - 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.
 

 2010-11-08 - 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().
 

 2010-11-08 - 24de0ed - lavfi 1.59.0 - avfilter_free()

   Rename avfilter_destroy() to avfilter_free().
   This change breaks libavfilter API/ABI.
 

 2010-11-07 - 1e80a0e - lavfi 1.58.0 - avfiltergraph.h

   Remove graphparser.h header, move AVFilterInOut and
   avfilter_graph_parse() declarations to libavfilter/avfiltergraph.h.
 

 2010-11-07 - 7313132 - lavfi 1.57.0 - AVFilterInOut

   Rename field AVFilterInOut.filter to AVFilterInOut.filter_ctx.
   This change breaks libavfilter API.
 

 2010-11-04 - 97dd1e4 - lavfi 1.56.0 - avfilter_graph_free()

   Rename avfilter_graph_destroy() to avfilter_graph_free().
   This change breaks libavfilter API/ABI.
 

 2010-11-04 - e15aeea - lavfi 1.55.0 - avfilter_graph_alloc()

   Add avfilter_graph_alloc() to libavfilter/avfiltergraph.h.
 

 2010-11-02 - 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().
 

 2010-11-02 - 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().
 

 2010-11-02 - 262d1c5 - lavcore 0.10.0 - samplefmt.h

   Define enum AVSampleFormat in libavcore/samplefmt.h, deprecate enum
   SampleFormat.
 

 2010-10-16 - 2a24df9 - lavfi 1.52.0 - avfilter_graph_config()

   Add the function avfilter_graph_config() in avfiltergraph.h.
 

 2010-10-15 - 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.
 

 2010-10-10 - 867ae7a - lavfi 1.49.0 - AVFilterLink.time_base

   Add time_base field to AVFilterLink.
 

 2010-09-27 - c85eef4 - lavu 50.31.0 - av_set_options_string()

   Move av_set_options_string() from libavfilter/parseutils.h to
   libavutil/opt.h.
 

 2010-09-27 - 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.
 

 2010-09-27 - 372e288 - lavu 50.30.0 - av_get_token()

   Move av_get_token() from libavfilter/parseutils.h to
   libavutil/avstring.h.
 

 2010-09-26 - 635d4ae - lsws 0.12.0 - swscale.h

   Add the functions sws_alloc_context() and sws_init_context().
 

 2010-09-26 - 6ed0404 - lavu 50.29.0 - opt.h

   Move libavcodec/opt.h to libavutil/opt.h.
 

 2010-09-24 - 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!.
 

 2010-09-24 - f66eb58 - lavc 52.90.0 - av_opt_show2()

   Deprecate av_opt_show() in favor or av_opt_show2().
 

 2010-09-14 - bc6f0af - lavu 50.27.0 - av_popcount()

   Add av_popcount() to libavutil/common.h.
 

 2010-09-08 - c6c98d0 - lavu 50.26.0 - av_get_cpu_flags()

   Add av_get_cpu_flags().
 

 2010-09-07 - 34017fd - lavcore 0.9.0 - av_image_copy()

   Add av_image_copy().
 

 2010-09-07 - 9686abb - lavcore 0.8.0 - av_image_copy_plane()

   Add av_image_copy_plane().
 

 2010-09-07 - 9b7269e - lavcore 0.7.0 - imgutils.h

   Adopt hierarchical scheme for the imgutils.h function names,
   deprecate the old names.
 

 2010-09-04 - 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.
 

 2010-08-26 - 5da19b5 - lavc 52.87.0 - avcodec_get_channel_layout()

   Add avcodec_get_channel_layout() in audioconvert.h.
 

 2010-08-20 - e344336 - lavcore 0.6.0 - av_fill_image_max_pixsteps()

   Rename av_fill_image_max_pixstep() to av_fill_image_max_pixsteps().
 

 2010-08-18 - a6ddf8b - lavcore 0.5.0 - av_fill_image_max_pixstep()

   Add av_fill_image_max_pixstep() in imgutils.h.
 

 2010-08-17 - 4f2d2e4 - lavu 50.24.0 - AV_NE()

   Add the AV_NE macro.
 

 2010-08-17 - ad2c950 - lavfi 1.36.0 - audio framework

   Implement AVFilterBufferRefAudioProps struct for audio properties,
   get_audio_buffer(), filter_samples() functions and related changes.
 

 2010-08-12 - 81c1eca - lavcore 0.4.0 - av_get_image_linesize()

   Add av_get_image_linesize() in imgutils.h.
 

 2010-08-11 - c1db7bf - lavfi 1.34.0 - AVFilterBufferRef

   Resize data and linesize arrays in AVFilterBufferRef to 8.
 
   This change breaks libavfilter API/ABI.
 

 2010-08-11 - 9f08d80 - lavc 52.85.0 - av_picture_data_copy()

   Add av_picture_data_copy in avcodec.h.
 

 2010-08-11 - 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.
 

 2010-08-11 - 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.

 2010-08-07 - 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
 

 2010-08-07 - 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
 

 2010-08-07 - ecc8dad - lavfi 1.29.0 - AVFilterBufferRef

   Rename AVFilterPicRef to AVFilterBufferRef.
 

 2010-08-07 - d54e094 - lavfi 1.28.0 - AVFilterBuffer

   Move format field from AVFilterBuffer to AVFilterPicRef.
 

 2010-08-06 - 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.
 

 2010-07-30 - 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.
 

 2010-07-29 - e7bd48a - lavcore 0.2.0 - imgutils.h

   Add functions av_fill_image_linesizes() and
   av_fill_image_pointers(), declared in libavcore/imgutils.h.
 

 2010-07-27 - 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.
 

 2010-07-23 - 4485247 - lavu 50.23.0 - mathematics.h

   Add the M_PHI constant definition.
 

 2010-07-22 - 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.
 

 2010-07-21 - aac6ca6 - lavcore 0.0.0

   Add libavcore.
 

 2010-07-17 - b5c582f - lavfi 1.25.0 - AVFilterBuffer

   Remove w and h fields from AVFilterBuffer.
 

 2010-07-17 - f0d77b2 - lavfi 1.24.0 - AVFilterBuffer

   Rename AVFilterPic to AVFilterBuffer.
 

 2010-07-17 - 57fe80f - lavf 52.74.0 - url_fskip()

   Make url_fskip() return an int error code instead of void.
 

 2010-07-11 - 23940f1 - lavc 52.83.0

   Add AVCodecContext.lpc_type and AVCodecContext.lpc_passes fields.

   Add AVLPCType enum.
   Deprecate AVCodecContext.use_lpc.
 

 2010-07-11 - e1d7c88 - lavc 52.82.0 - avsubtitle_free()

   Add a function for free the contents of a AVSubtitle generated by
   avcodec_decode_subtitle.
 

 2010-07-11 - b91d08f - lavu 50.22.0 - bswap.h and intreadwrite.h

   Make the bswap.h and intreadwrite.h API public.
 

 2010-07-08 - ce1cd1c - lavu 50.21.0 - pixdesc.h

   Rename read/write_line() to av_read/write_image_line().
 

 2010-07-07 - 4d508e4 - lavfi 1.21.0 - avfilter_copy_picref_props()

   Add avfilter_copy_picref_props().

 2010-07-03 - 2d525ef - lavc 52.79.0

   Add FF_COMPLIANCE_UNOFFICIAL and change all instances of
   FF_COMPLIANCE_INOFFICIAL to use FF_COMPLIANCE_UNOFFICIAL.

 2010-07-02 - 89eec74 - lavu 50.20.0 - lfg.h

   Export av_lfg_init(), av_lfg_get(), av_mlfg_get(), and av_bmg_get() through
   lfg.h.
 

 2010-06-28 - 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.
 

 2010-06-22 - 735cf6b - lavf 52.71.0 - URLProtocol.priv_data_size, priv_data_class

   Add priv_data_size and priv_data_class to URLProtocol.

 2010-06-22 - ffbb289 - lavf 52.70.0 - url_alloc(), url_connect()

   Add url_alloc() and url_connect().

 2010-06-22 - 9b07a2d - lavf 52.69.0 - av_register_protocol2()

   Add av_register_protocol2(), deprecating av_register_protocol().

 2010-06-09 - 65db058 - lavu 50.19.0 - av_compare_mod()

   Add av_compare_mod() to libavutil/mathematics.h.
 

 2010-06-05 - 0b99215 - lavu 50.18.0 - eval API

   Make the eval API public.
 

 2010-06-04 - 31878fc - lavu 50.17.0 - AV_BASE64_SIZE

   Add AV_BASE64_SIZE() macro.
 

 2010-06-02 - 7e566bb - lavc 52.73.0 - av_get_codec_tag_string()

   Add av_get_codec_tag_string().
 

 2010-06-01 - 2b99142 - lsws 0.11.0 - convertPalette API

   Add sws_convertPalette8ToPacked32() and sws_convertPalette8ToPacked24().

 2010-05-26 - 93ebfee - lavc 52.72.0 - CODEC_CAP_EXPERIMENTAL

   Add CODEC_CAP_EXPERIMENTAL flag.

   NOTE: this was backported to 0.6

 2010-05-23 - 9977863 - lavu 50.16.0 - av_get_random_seed()

   Add av_get_random_seed().

 2010-05-18 - 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

 2010-05-09 - b6bc205 - lavfi 1.20.0 - AVFilterPicRef

   Add interlaced and top_field_first fields to AVFilterPicRef.
 

 ------------------------------8<-------------------------------------
                    0.6 branch was cut here
 ----------------------------->8--------------------------------------
 

 2010-05-01 - 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.
 

 2010-04-01 - 3dd6180 - lavf 52.61.0 - metadata API

   Add a flag for av_metadata_set2() to disable overwriting of
   existing tags.
 

 2010-04-01 - 0fb49b5 - lavc 52.66.0

   Add avcodec_get_edge_width().

 2010-03-31 - d103218 - lavc 52.65.0

   Add avcodec_copy_context().
 

 2010-03-31 - 1a70d12 - lavf 52.60.0 - av_match_ext()

   Make av_match_ext() public.
 

 2010-03-31 - 1149150 - lavu 50.14.0 - AVMediaType

   Move AVMediaType enum from libavcodec to libavutil.
 

 2010-03-31 - 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.
 

 2010-03-25 - 8795823 - lavu 50.13.0 - av_strerror()

   Implement av_strerror().
 

 2010-03-23 - e1484eb - lavc 52.60.0 - av_dct_init()

   Support DCT-I and DST-I.

 2010-03-15 - b8819c8 - lavf 52.56.0 - AVFormatContext.start_time_realtime

   Add AVFormatContext.start_time_realtime field.
 

 2010-03-13 - 5bb5c1d - lavfi 1.18.0 - AVFilterPicRef.pos

   Add AVFilterPicRef.pos field.
 

 2010-03-13 - 60c144f - lavu 50.12.0 - error.h

   Move error code definitions from libavcodec/avcodec.h to
   the new public header libavutil/error.h.
 

 2010-03-07 - c709483 - lavc 52.56.0 - avfft.h

   Add public FFT interface.
 

 2010-03-06 - ac6ef86 - lavu 50.11.0 - av_stristr()

   Add av_stristr().
 

 2010-03-03 - 4b83fc0 - lavu 50.10.0 - av_tree_enumerate()

   Add av_tree_enumerate().
 

 2010-02-07 - b687c1a - lavu 50.9.0 - av_compare_ts()

   Add av_compare_ts().
 

 2010-02-05 - 3f3dc76 - lsws 0.10.0 - sws_getCoefficients()

   Add sws_getCoefficients().
 

 2010-02-01 - ca76a11 - lavf 52.50.0 - metadata API

   Add a list of generic tag names, change 'author' -> 'artist',
   'year' -> 'date'.
 

 2010-01-30 - 80a07f6 - lavu 50.8.0 - av_get_pix_fmt()

   Add av_get_pix_fmt().
 

 2010-01-21 - 01cc47d - lsws 0.9.0 - sws_scale()

   Change constness attributes of sws_scale() parameters.
 

 2010-01-10 - 3fb8e77 - lavfi 1.15.0 - avfilter_graph_config_links()

   Add a log_ctx parameter to avfilter_graph_config_links().
 

 2010-01-07 - 8e9767f - lsws 0.8.0 - sws_isSupported{In,Out}put()

   Add sws_isSupportedInput() and sws_isSupportedOutput() functions.

 2010-01-06 - 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.
 

 2010-01-03 - 4fd1f18 - lavfi 1.13.0 - avfilter_add_colorspace()

   Add avfilter_add_colorspace().
 

 2010-01-02 - 8eb631f - lavf 52.46.0 - av_match_ext()

   Add av_match_ext(), it should be used in place of match_ext().
 

 2010-01-01 - a1f547b - lavf 52.45.0 - av_guess_format()

   Add av_guess_format(), it should be used in place of guess_format().
 

 2009-12-13 - a181981 - lavf 52.43.0 - metadata API

   Add av_metadata_set2(), AV_METADATA_DONT_STRDUP_KEY and
   AV_METADATA_DONT_STRDUP_VAL.

 2009-12-13 - 277c733 - lavu 50.7.0 - avstring.h API

   Add av_d2str().

 2009-12-13 - 02b398e - lavc 52.42.0 - AVStream

   Add avg_frame_rate.

 2009-12-12 - 3ba69a1 - lavu 50.6.0 - av_bmg_next()

   Introduce the av_bmg_next() function.
 

 2009-12-05 - a13a543 - lavfi 1.12.0 - avfilter_draw_slice()

   Add a slice_dir parameter to avfilter_draw_slice().
 

 2009-11-26 - 4cc3f6a - lavfi 1.11.0 - AVFilter

   Remove the next field from AVFilter, this is not anymore required.
 

 2009-11-25 - 1433c4a - lavfi 1.10.0 - avfilter_next()

   Introduce the avfilter_next() function.
 

 2009-11-25 - 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.
 

 2009-11-25 - 74a0059 - lavu 50.5.0 - pixdesc.h API

   Make the pixdesc.h API public.
 

 2009-10-27 - 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.
 

 2009-10-23 - cccd292 - lavfi 1.4.1 - AVFilter.description

   Add a description field to AVFilter.

 2009-10-19 - 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).
 

 2009-10-18 - 0eb4ff9 - lavfi 1.0.0 - avfilter_get_video_buffer()

   Make avfilter_get_video_buffer() recursive and add the w and h
   parameters to it.
 

 2009-10-07 - 46c40e4 - lavfi 0.5.1 - AVFilterPic

   Add w and h fields to AVFilterPic.

 2009-06-22 - 92400be - lavf 52.34.1 - AVFormatContext.packet_size

   This is now an unsigned int instead of a signed int.
 

 2009-06-19 - 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.
 

 2009-06-03 - 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.
 

 2009-06-01 - 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.

 2009-04-30 - ce1d9c8 - lavc 52.28.0 - av_free_packet()

   av_free_packet() is no longer an inline function. It is now exported.
 

 2009-04-11 - 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).
 

 2009-04-07 - 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.
 

 2009-04-03 - 7b09db3 - lavu 50.3.0 - av_fifo_space()

   Introduce the av_fifo_space() function.
 

 2009-04-02 - fabd246 - lavc 52.23.0 - AVPacket

   Move AVPacket declaration from libavformat/avformat.h to
   libavcodec/avcodec.h.
 

 2009-03-22 - 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.
 

 2009-03-22 - 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.
 

 2009-03-21 - 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.
 

 2009-03-08 - 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.

 2009-03-01 - 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