APIchanges

Never assume the API of libav* to be stable unless at least 1 month has passed
since the last major version increase.

The last version increases were:
libavcodec:    2014-08-09
libavdevice:   2014-08-09
libavfilter:   2014-08-09
libavformat:   2014-08-09
libavresample: 2014-08-09
libswscale:    2014-08-09
libavutil:     2014-08-09


API changes, most recent first:

2014-08-13 - 8ddc326 - lavu 54.03.0 - mem.h
  Add av_strndup().

2014-08-13 - a8c104a - lavu 54.02.0 - opt.h
  Add av_opt_get_dict_val/set_dict_val with AV_OPT_TYPE_DICT to support
  dictionary types being set as options.

2014-08-13 - afbd4b8 - lavf 56.01.0 - avformat.h
  Add AVFormatContext.event_flags and AVStream.event_flags for signaling to
  the user when events happen in the file/stream.

2014-08-10 - fb1ddcd - lavr 2.1.0 - avresample.h
  Add avresample_convert_frame() and avresample_config().

2014-08-10 - fb1ddcd - lavu 54.1.0 - error.h
  Add AVERROR_INPUT_CHANGED and AVERROR_OUTPUT_CHANGED.

2014-08-08 - d35b94f - lavc 55.57.4 - avcodec.h
  Deprecate FF_IDCT_XVIDMMX define and xvidmmx idct option.
  Replaced by FF_IDCT_XVID and xvid respectively.

2014-08-07 - bb78903 - lsws 2.1.3 - swscale.h
  sws_getCachedContext is not going to be removed in the future.

2014-08-07 - ad1ee5f - lavc 55.57.3 - avcodec.h
  reordered_opaque is not going to be removed in the future.

2014-08-04 - e9abafc - lavu 53.22.0 - pixfmt.h
  Add AV_PIX_FMT_YA16 pixel format for 16 bit packed gray with alpha.

2014-08-04 - e96c3b8 - lavu 53.21.1 - avstring.h
  Rename AV_PIX_FMT_Y400A to AV_PIX_FMT_YA8 to better identify the format.
  An alias pixel format and color space name are provided for compatibility.

2014-08-04 - d2962e9 - lavu 53.21.0 - pixdesc.h
  Support name aliases for pixel formats.

2014-08-03 - 1ef9e83 - lavc 55.57.2 - avcodec.h
2014-08-03 - 1ef9e83 - lavu 53.20.0 - frame.h
  Deprecate AVCodecContext.dtg_active_format and use side-data instead.

2014-08-03 - 9f17685 - lavc 55.57.1 - avcodec.h
  Deprecate unused FF_IDCT_IPP define and ipp avcodec option.
  Deprecate unused FF_DEBUG_PTS define and pts avcodec option.
  Deprecate unused FF_CODER_TYPE_DEFLATE define and deflate avcodec option.
  Deprecate unused FF_DCT_INT define and int avcodec option.
  Deprecate unused avcodec option scenechange_factor.

2014-07-29 - 69e7336 - lavu 53.19.0 - avstring.h
  Make name matching function from lavf public as av_match_name().

2014-07-28 - c5fca01 - lavc 55.57.0 - avcodec.h
  Add AV_CODEC_PROP_REORDER to mark codecs supporting frame reordering.

2014-07-09 - a54f03b - lavu 53.18.0 - display.h
  Add av_display_matrix_flip() to flip the transformation matrix.

2014-07-09 - f6ee61f - lavc 55.56.0 - dv_profile.h
  Add a public API for DV profile handling.

2014-06-20 - 9e500ef - lavu 53.17.0 - imgutils.h
  Add av_image_check_sar().

2014-06-20 - 874390e - lavc 55.55.0 - avcodec.h
  Add av_packet_rescale_ts() to simplify timestamp conversion.

2014-06-18 - 194be1f - lavf 55.20.0 - avformat.h
  The proper way for providing a hint about the desired timebase to the muxers
  is now setting AVStream.time_base, instead of AVStream.codec.time_base as was
  done previously. The old method is now deprecated.

2014-06-01 - 0957b27 - lavc 55.54.0 - avcodec.h
  Add AVCodecContext.side_data_only_packets to allow encoders to output packets
  with only side data. This option may become mandatory in the future, so all
  users are recommended to update their code and enable this option.

2014-06-01 - 8c02adc - lavu 53.16.0 - frame.h, pixfmt.h
  Move all color-related enums (AVColorPrimaries, AVColorSpace, AVColorRange,
  AVColorTransferCharacteristic, and AVChromaLocation) inside lavu.
  Add AVFrame fields for them on the next lavu major bump.

2014-05-28 - b2d4565 - lavr 1.3.0 - avresample.h
  Add avresample_max_output_samples

2014-05-28 - 6d21259 - lavf 55.19.0 - avformat.h
  Add strict_std_compliance and related AVOptions to support experimental
  muxing.

2014-05-20 - c23c96b - lavf 55.18.0 - avformat.h
  Add av_stream_get_side_data() to access stream-level side data
  in the same way as av_packet_get_side_data().

2014-05-19 - bddd8cb - lavu 53.15.0 - frame.h, display.h
  Add AV_FRAME_DATA_DISPLAYMATRIX for exporting frame-level
  spatial rendering on video frames for proper display.

2014-05-19 - bddd8cb - lavc 55.53.0 - avcodec.h
  Add AV_PKT_DATA_DISPLAYMATRIX for exporting packet-level
  spatial rendering on video frames for proper display.

2014-05-19 - a312f71 - lavf 55.17.1 - avformat.h
  Deprecate AVStream.pts and the AVFrac struct, which was its only use case.
  Those fields were poorly defined and not meant to be public, so there is
  no replacement for them.

2014-05-18 - fd05602 - lavc 55.52.0 - avcodec.h
  Add avcodec_free_context(). From now on it should be used for freeing
  AVCodecContext.

2014-05-15 - 0c1959b - lavf 55.17.0 - avformat.h
  Add AVMFT_FLAG_BITEXACT flag. Muxers now use it instead of checking
  CODEC_FLAG_BITEXACT on the first stream.

2014-05-11 - 66e6c8a - lavu 53.14.0 - pixfmt.h
  Add AV_PIX_FMT_VDA for new-style VDA acceleration.

2014-05-01 - a2941c8 - lavc 55.50.3 - avcodec.h
  Deprecate CODEC_FLAG_MV0. It is replaced by the flag "mv0" in the
  "mpv_flags" private option of the mpegvideo encoders.

2014-05-01 - 6484149 - lavc 55.50.2 - avcodec.h
  Deprecate CODEC_FLAG_GMC. It is replaced by the "gmc" private option of the
  libxvid encoder.

2014-05-01 - b2c3171 - lavc 55.50.1 - avcodec.h
  Deprecate CODEC_FLAG_NORMALIZE_AQP. It is replaced by the flag "naq" in the
  "mpv_flags" private option of the mpegvideo encoders.

2014-05-01 - 5fcceda - avcodec.h
  Deprecate CODEC_FLAG_INPUT_PRESERVED. Its functionality is replaced by passing
  reference-counted frames to encoders.

2014-04-28 - ed4b757 - lavc 55.50.0 - dxva2.h
  Add FF_DXVA2_WORKAROUND_INTEL_CLEARVIDEO for old Intel GPUs.

2014-04-22 - 502512e - lavu 53.13.0 - avutil.h
  Add av_get_time_base_q().

2014-04-17 - 0983d48 - lavu 53.12.0 - crc.h
  Add AV_CRC_16_ANSI_LE crc variant.

2014-04-07 - 8b17243 - lavu 53.11.0 - pixfmt.h
  Add AV_PIX_FMT_YVYU422 pixel format.

2014-04-04 - 8542f9c - lavu 53.10.0 - replaygain.h
  Full scale for peak values is now 100000 (instead of UINT32_MAX) and values
  may overflow.

2014-04-03 - 7763118 - lavu 53.09.0 - log.h
  Add AV_LOG(c) macro to have 256 color debug messages.

2014-03-24 - d161ae0 - lavu 53.08.0 - frame.h
  Add av_frame_remove_side_data() for removing a single side data
  instance from a frame.

2014-03-24 - 5a7e35d - lavu 53.07.0 - frame.h, replaygain.h
  Add AV_FRAME_DATA_REPLAYGAIN for exporting replaygain tags.
  Add a new header replaygain.h with the AVReplayGain struct.

2014-03-24 - 5a7e35d - lavc 55.36.0 - avcodec.h
  Add AV_PKT_DATA_REPLAYGAIN for exporting replaygain tags.

2014-03-24 - 25b3258 - lavf 55.13.0 - avformat.h
  Add AVStream.side_data and AVStream.nb_side_data for exporting stream-global
  side data (e.g. replaygain tags, video rotation)

2014-03-24 - 0e2c3ee - lavc 55.35.0 - avcodec.h
  Give the name AVPacketSideData to the previously anonymous struct used for
  AVPacket.side_data.

2014-03-16 - 1481d24 - lavu 53.06.0 - pixfmt.h
  Add RGBA64 pixel format and variants.

2014-02-24 - 1155fd0 - lavu 53.05.0 - frame.h
  Add av_frame_copy() for copying the frame data.

2014-02-22 - 7e86c27 - lavr 1.2.0 - avresample.h
  Add avresample_is_open() for checking whether a resample context is open.

2014-02-19 - c3ecd96 - lavu 53.04.0  - opt.h
  Add AV_OPT_FLAG_EXPORT and AV_OPT_FLAG_READONLY to mark options meant (only)
  for reading.

2014-02-19 - 6bb8720 - lavu 53.03.01 - opt.h
  Deprecate unused AV_OPT_FLAG_METADATA.