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  1. Never assume the API of libav* to be stable unless at least 1 week has passed since
  2. the last major version increase.
  3. The last version increases were:
  4. libavcodec: ?
  5. libavdevice: ?
  6. libavfilter: 2009-10-18
  7. libavformat: ?
  8. libpostproc: ?
  9. libswscale: ?
  10. libavutil: 2009-03-08
  11. API changes, most recent first:
  12. 2010-05-23 - r23255 - lavu 50.16.0 - av_get_random_seed
  13. Add av_get_random_seed()
  14. 2010-05-18 - r23161 - lavf 52.63.0 - AVFMT_FLAG_RTP_HINT
  15. Add AVFMT_FLAG_RTP_HINT as possible value for AVFormatContext.flags
  16. 2010-05-09 - r23066 - lavfi 1.20.0 - AVFilterPicRef
  17. Add interlaced and top_field_first fields to AVFilterPicRef.
  18. 2010-05-01 - r23002 - lavf 52.62.0 - probe function
  19. Add av_probe_input_format2 to API, it allows ignoring probe
  20. results below given score and returns the actual probe score.
  21. 2010-04-01 - r22806 - lavf 52.61.0 - metadata API
  22. Add a flag for av_metadata_set2() to disable overwriting of
  23. existing tags.
  24. 2010-04-01 - r22753 - lavc 52.66.0
  25. Add avcodec_get_edge_width()
  26. 2010-03-31 - r22750 - lavc 52.65.0
  27. Add avcodec_copy_context().
  28. 2010-03-31 - r22748 - lavf 52.60.0 - av_match_ext()
  29. Make av_match_ext() public.
  30. 2010-03-31 - r22736 - lavu 50.14.0 - AVMediaType
  31. Move AVMediaType enum from libavcodec to libavutil.
  32. 2010-03-31 - r22735 - lavc 52.64.0 - AVMediaType
  33. Define AVMediaType enum, and use it instead of enum CodecType, which
  34. is deprecated and will be dropped at the next major bump.
  35. 2010-03-25 - r22684 - lavu 50.13.0 - av_strerror()
  36. Implement av_strerror().
  37. 2010-03-23 - r22649 - lavc 52.60.0 - av_dct_init()
  38. Support DCT-I and DST-I
  39. 2010-03-15 - r22540 - lavf 52.56.0 - AVFormatContext.start_time_realtime
  40. Add AVFormatContext.start_time_realtime field.
  41. 2010-03-13 - r22506 - lavfi 1.18.0 - AVFilterPicRef.pos
  42. Add AVFilterPicRef.pos field.
  43. 2010-03-13 - r22501 - lavu 50.12.0 - error.h
  44. Move error code definitions from libavcodec/avcodec.h to
  45. the new public header libavutil/error.h.
  46. 2010-03-07 - r22291 - lavc 52.56.0 - avfft.h
  47. Add public FFT interface.
  48. 2010-03-06 - r22251 - lavu 50.11.0 - av_stristr()
  49. Add av_stristr().
  50. 2010-03-03 - r22174 - lavu 50.10.0 - av_tree_enumerate()
  51. Add av_tree_enumerate().
  52. 2010-02-07 - r21673 - lavu 50.9.0 - av_compare_ts()
  53. Add av_compare_ts().
  54. 2010-02-05 - r30513 - lsws 0.10.0 - sws_getCoefficients()
  55. Add sws_getCoefficients().
  56. 2010-02-01 - r21587 - lavf 52.50.0 - metadata API
  57. Add a list of generic tag names, change 'author' -> 'artist',
  58. 'year' -> 'date'.
  59. 2010-01-30 - r21545 - lavu 50.8.0 - av_get_pix_fmt()
  60. Add av_get_pix_fmt().
  61. 2010-01-21 - r30381 - lsws 0.9.0 - sws_scale
  62. Change constness attributes of sws_scale() parameters.
  63. 2010-01-10 - r21121 - lavfi 1.15.0 - avfilter_graph_config_links()
  64. Add a log_ctx parameter to avfilter_graph_config_links().
  65. 2010-01-07 - r30236 - lsws 0.8.0 - sws_isSupported{In,Out}put
  66. Add sws_isSupportedInput() and sws_isSupportedOutput() functions.
  67. 2010-01-06 - r21035 - lavfi 1.14.0 - avfilter_add_colorspace()
  68. Change the avfilter_add_colorspace() signature, make it accept an
  69. (AVFilterFormats **) rather than an (AVFilterFormats *) as before.
  70. 2010-01-03 - r21007 - lavfi 1.13.0 - avfilter_add_colorspace()
  71. Add avfilter_add_colorspace().
  72. 2010-01-02 - r20998 - lavf 52.46.0 - av_match_ext()
  73. Add av_match_ext(), it should be used in place of match_ext().
  74. 2010-01-01 - r20991 - lavf 52.45.0 - av_guess_format()
  75. Add av_guess_format(), it should be used in place of guess_format().
  76. 2009-12-13 - r20834 - lavf 52.43.0 - metadata API
  77. Add av_metadata_set2(), AV_METADATA_DONT_STRDUP_KEY and AV_METADATA_DONT_STRDUP_VAL.
  78. 2009-12-13 - r20829 - lavu 50.7.0 - avstring.h API
  79. Add av_d2str().
  80. 2009-12-13 - r20826 - lavc 52.42.0 - AVStream
  81. Add avg_frame_rate.
  82. 2009-12-12 - r20808 - lavu 50.6.0 - av_bmg_next()
  83. Introduce the av_bmg_next() function.
  84. 2009-12-05 - r20734 - lavfi 1.12.0 - avfilter_draw_slice()
  85. Add a slice_dir parameter to avfilter_draw_slice().
  86. 2009-11-26 - r20611 - lavfi 1.11.0 - AVFilter
  87. Remove the next field from AVFilter, this is not anymore required.
  88. 2009-11-25 - r20607 - lavfi 1.10.0 - avfilter_next()
  89. Introduce the avfilter_next() function.
  90. 2009-11-25 - r20605 - lavfi 1.9.0 - avfilter_register()
  91. Change the signature of avfilter_register() to make it return an
  92. int. This is required since now the registration operation may fail.
  93. 2009-11-25 - r20603 - lavu 50.5.0 - pixdesc.h API
  94. Make the pixdesc.h API public.
  95. 2009-10-27 - r20385 - lavfi 1.5.0 - AVFilter.next
  96. Add a next field to AVFilter, this is used for simplifying the
  97. registration and management of the registered filters.
  98. 2009-10-23 - r20356 - lavfi 1.4.1 - AVFilter.description
  99. Add a description field to AVFilter.
  100. 2009-10-19 - r20302 - lavfi 1.3.0 - avfilter_make_format_list()
  101. Change the interface of avfilter_make_format_list() from
  102. avfilter_make_format_list(int n, ...) to
  103. avfilter_make_format_list(enum PixelFormat *pix_fmts).
  104. 2009-10-18 - r20272 - lavfi 1.0.0 - avfilter_get_video_buffer()
  105. Make avfilter_get_video_buffer() recursive and add the w and h
  106. parameters to it.
  107. 2009-10-07 - r20189 - lavfi 0.5.1 - AVFilterPic
  108. Add w and h fields to AVFilterPic.
  109. 2009-06-22 - r19250 - lavf 52.34.1 - AVFormatContext.packet_size
  110. This is now an unsigned int instead of a signed int.
  111. 2009-06-19 - r19222 - lavc 52.32.0 - AVSubtitle.pts
  112. Add a pts field to AVSubtitle which gives the subtitle packet pts
  113. in AV_TIME_BASE. Some subtitle de-/encoders (e.g. XSUB) will
  114. not work right without this.
  115. 2009-06-03 - r19078 - lavc 52.30.2 - AV_PKT_FLAG_KEY
  116. PKT_FLAG_KEY has been deprecated and will be dropped at the next
  117. major version. Use AV_PKT_FLAG_KEY instead.
  118. 2009-06-01 - r19025 - lavc 52.30.0 - av_lockmgr_register()
  119. av_lockmgr_register() can be used to register a callback function
  120. that lavc (and in the future, libraries that depend on lavc) can use
  121. to implement mutexes. The application should provide a callback function
  122. that implements the AV_LOCK_* operations described in avcodec.h.
  123. When the lock manager is registered, FFmpeg is guaranteed to behave
  124. correctly in a multi-threaded application.
  125. 2009-04-30 - r18719 - lavc 52.28.0 - av_free_packet
  126. av_free_packet() is no longer an inline function. It is now exported.
  127. 2009-04-11 - r18431 - lavc 52.25.0 - deprecate av_destruct_packet_nofree
  128. Please use NULL instead. This has been supported since r16506
  129. (lavf > 52.23.1, lavc > 52.10.0).
  130. 2009-04-07 - r18351 - lavc 52.23.0 - avcodec_decode_video/audio/subtitle
  131. The old decoding functions are deprecated, all new code should use the
  132. new functions avcodec_decode_video2(), avcodec_decode_audio3() and
  133. avcodec_decode_subtitle2(). These new functions take an AVPacket *pkt
  134. argument instead of a const uint8_t *buf / int buf_size pair.
  135. 2009-04-03 - r18321 - lavu 50.3.0 - av_fifo_space
  136. Introduce the av_fifo_space() function.
  137. 2009-04-02 - r18317 - lavc 52.23.0 - AVPacket
  138. Move AVPacket declaration from libavformat/avformat.h to
  139. libavcodec/avcodec.h.
  140. 2009-03-22 - r18163 - lavu 50.2.0 - RGB32 pixel formats
  141. Convert the pixel formats PIX_FMT_ARGB, PIX_FMT_RGBA, PIX_FMT_ABGR,
  142. PIX_FMT_BGRA, which were defined as macros, into enum PixelFormat values.
  143. Conversely PIX_FMT_RGB32, PIX_FMT_RGB32_1, PIX_FMT_BGR32 and
  144. PIX_FMT_BGR32_1 are now macros.
  145. avcodec_get_pix_fmt() now recognizes the "rgb32" and "bgr32" aliases.
  146. Re-sort the enum PixelFormat list accordingly.
  147. This change breaks API/ABI backward compatibility.
  148. 2009-03-22 - r18133 - lavu 50.1.0 - PIX_FMT_RGB5X5 endian variants
  149. Add the enum PixelFormat values:
  150. PIX_FMT_RGB565BE, PIX_FMT_RGB565LE, PIX_FMT_RGB555BE, PIX_FMT_RGB555LE,
  151. PIX_FMT_BGR565BE, PIX_FMT_BGR565LE, PIX_FMT_BGR555BE, PIX_FMT_BGR555LE.
  152. 2009-03-21 - r18116 - lavu 50.0.0 - av_random*
  153. The Mersenne Twister PRNG implemented through the av_random* functions
  154. was removed. Use the lagged Fibonacci PRNG through the av_lfg* functions
  155. instead.
  156. 2009-03-08 - r17869 - lavu 50.0.0 - AVFifoBuffer
  157. av_fifo_init, av_fifo_read, av_fifo_write and av_fifo_realloc were dropped
  158. and replaced by av_fifo_alloc, av_fifo_generic_read, av_fifo_generic_write
  159. and av_fifo_realloc2.
  160. In addition, the order of the function arguments of av_fifo_generic_read
  161. was changed to match av_fifo_generic_write.
  162. The AVFifoBuffer/struct AVFifoBuffer may only be used in an opaque way by
  163. applications, they may not use sizeof() or directly access members.
  164. 2009-03-01 - r17682 - lavf 52.31.0 - Generic metadata API
  165. Introduce a new metadata API (see av_metadata_get() and friends).
  166. The old API is now deprecated and should not be used anymore. This especially
  167. includes the following structure fields:
  168. - AVFormatContext.title
  169. - AVFormatContext.author
  170. - AVFormatContext.copyright
  171. - AVFormatContext.comment
  172. - AVFormatContext.album
  173. - AVFormatContext.year
  174. - AVFormatContext.track
  175. - AVFormatContext.genre
  176. - AVStream.language
  177. - AVStream.filename
  178. - AVProgram.provider_name
  179. - AVProgram.name
  180. - AVChapter.title