APIchanges

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:

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

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

2014-08-02 - xxxxxxx - lavu 52.98.100 - pixelutils.h
  Add pixelutils API with SAD functions

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

2014-08-xx - xxxxxxx - 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-xx - xxxxxxx - lavu 53.21.0 - pixdesc.h
  Support name aliases for pixel formats.

2014-08-04 - xxxxxxx - lavc 55.72.101 / 55.57.2 - avcodec.h
2014-08-04 - xxxxxxx - lavu 52.95.100 / 53.20.0 - frame.h
  Deprecate AVCodecContext.dtg_active_format and use side-data instead.

2014-08-03 - xxxxxxx - lavc 55.72.100 - avcodec.h
  Add get_pixels() to AVDCT

2014-08-xx - xxxxxxx - 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.

2014-07-30 - ba3e331 - lavu 52.94.100 - frame.h
  Add av_frame_side_data_name()

2014-07-29 - 31e0b5d / 69e7336 - lavu 52.92.100 / 53.19.0 - avstring.h
  Make name matching function from lavf public as av_match_name().

2014-07-28 - 2e5c8b0 / c5fca01 - lavc 55.71.100 / 55.57.0 - avcodec.h
  Add AV_CODEC_PROP_REORDER to mark codecs supporting frame reordering.

2014-07-27 - ff9a154 - lavf 55.50.100 - avformat.h
  New field int64_t probesize2 instead of deprecated
  field int probesize.

2014-07-27 - 932ff70 - lavc 55.70.100 - avdct.h
  Add AVDCT / avcodec_dct_alloc() / avcodec_dct_init().

2014-07-23 - 8a4c086 - lavf 55.49.100 - avio.h
  Add avio_read_to_bprint()

2014-07-14 - 62227a7 - lavf 55.47.100 - avformat.h
  Add av_stream_get_parser()

2014-07-09 - c67690f / a54f03b - lavu 52.92.100 / 53.18.0 - display.h
  Add av_display_matrix_flip() to flip the transformation matrix.

2014-07-09 - 1b58f13 / f6ee61f - lavc 55.69.100 / 55.56.0 - dv_profile.h
  Add a public API for DV profile handling.

2014-06-20 - 0dceefc / 9e500ef - lavu 52.90.100 / 53.17.0 - imgutils.h
  Add av_image_check_sar().

2014-06-20 - 4a99333 / 874390e - lavc 55.68.100 / 55.55.0 - avcodec.h
  Add av_packet_rescale_ts() to simplify timestamp conversion.

2014-06-18 - ac293b6 / 194be1f - lavf 55.44.100 / 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.

2014-06-11 - 67d29da - lavc 55.66.101 - avcodec.h
  Increase FF_INPUT_BUFFER_PADDING_SIZE to 32 due to some corner cases needing
  it

2014-06-10 - xxxxxxx - lavf 55.43.100 - avformat.h
  New field int64_t max_analyze_duration2 instead of deprecated
  int max_analyze_duration.

2014-05-30 - 00759d7 - lavu 52.89.100 - opt.h
  Add av_opt_copy()

2014-06-01 - 03bb99a / 0957b27 - lavc 55.66.100 / 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 - 6e8e9f1 / 8c02adc - lavu 52.88.100 / 53.16.0 - frame.h, pixfmt.h
  Move all color-related enums (AVColorPrimaries, AVColorSpace, AVColorRange,
  AVColorTransferCharacteristic, and AVChromaLocation) inside lavu.
  And add AVFrame fields for them.

2014-05-29 - bdb2e80 / b2d4565 - lavr 1.3.0 - avresample.h
  Add avresample_max_output_samples

2014-05-24 - d858ee7 / 6d21259 - lavf 55.42.100 / 55.19.0 - avformat.h
  Add strict_std_compliance and related AVOptions to support experimental
  muxing.

2014-05-26 - xxxxxxx - lavu 52.87.100 - threadmessage.h
  Add thread message queue API.

2014-05-26 - c37d179 - lavf 55.41.100 - avformat.h
  Add format_probesize to AVFormatContext.

2014-05-19 - 7d25af1 / c23c96b - lavf 55.39.100 / 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-xx - xxxxxxx - lavu 52.86.100 - fifo.h
  Add av_fifo_alloc_array() function.

2014-05-19 - ef1d4ee / bddd8cb - lavu 52.85.100 / 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-xx - xxxxxxx - lavc 55.64.100 / 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 - 999a99c / a312f71 - lavf 55.38.101 / 55.17.1 - avformat.h
  Deprecate AVStream.pts and the AVFrac struct, which was its only use case.
  See use av_stream_get_end_pts()

2014-05-18 - 68c0518 / fd05602 - lavc 55.63.100 / 55.52.0 - avcodec.h
  Add avcodec_free_context(). From now on it should be used for freeing
  AVCodecContext.

2014-05-17 - 0eec06e - lavu 52.84.100 - time.h
  Add av_gettime_relative() av_gettime_relative_is_monotonic()

2014-05-15 - eacf7d6 / 0c1959b - lavf 55.38.100 / 55.17.0 - avformat.h
  Add AVMFT_FLAG_BITEXACT flag. Muxers now use it instead of checking
  CODEC_FLAG_BITEXACT on the first stream.

2014-05-15 - 96cb4c8 - lswr 0.19.100 - swresample.h
  Add swr_close()

2014-05-11 - 14aef38 / 66e6c8a - lavu 52.83.100 / 53.14.0 - pixfmt.h
  Add AV_PIX_FMT_VDA for new-style VDA acceleration.

2014-05-xx - xxxxxxx - lavu 52.82.0 - fifo.h
  Add av_fifo_freep() function.

2014-05-02 - ba52fb11 - lavu 52.81.0 - opt.h
  Add av_opt_set_dict2() function.

2014-05-01 - e77b985 / a2941c8 - lavc 55.60.103 / 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 - e40ae8c / 6484149 - lavc 55.60.102 / 55.50.2 - avcodec.h
  Deprecate CODEC_FLAG_GMC. It is replaced by the "gmc" private option of the
  libxvid encoder.

2014-05-01 - 1851643 / b2c3171 - lavc 55.60.101 / 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 - cac07d0 / 5fcceda - avcodec.h
  Deprecate CODEC_FLAG_INPUT_PRESERVED. Its functionality is replaced by passing
  reference-counted frames to encoders.

2014-04-29 - 1bf6396 - lavc 55.60.100 - avcodec.h
  Add AVCodecDescriptor.mime_types field.

2014-04-29 - xxxxxxx - lavu 52.80.0 - hash.h
  Add av_hash_final_bin(), av_hash_final_hex() and av_hash_final_b64().

2014-03-07 - 8b2a130 - lavc 55.50.0 / 55.53.100 - dxva2.h
  Add FF_DXVA2_WORKAROUND_INTEL_CLEARVIDEO for old Intel GPUs.

2014-04-22 - 502512e /dac7e8a - lavu 53.13.0 / 52.78.100 - avutil.h
  Add av_get_time_base_q().

2014-04-17 - a8d01a7 / 0983d48 - lavu 53.12.0 / 52.77.100 - crc.h
  Add AV_CRC_16_ANSI_LE crc variant.

2014-04-XX - xxxxxxx - lavf xx.xx.1xx - avformat.h
  Add av_format_inject_global_side_data()

2014-04-12 - 4f698be - lavu 52.76.100 - log.h