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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. libavcore: 2010-07-21
  6. libavdevice: ?
  7. libavfilter: 2009-10-18
  8. libavformat: ?
  9. libpostproc: ?
  10. libswscale: ?
  11. libavutil: 2009-03-08
  12. API changes, most recent first:
  13. 2010-11-08 - r25708 - lavu 50.33.0 - eval.h
  14. Deprecate functions:
  15. av_parse_and_eval_expr(),
  16. av_parse_expr(),
  17. av_eval_expr(),
  18. av_free_expr(),
  19. in favor of the functions:
  20. av_expr_parse_and_eval(),
  21. av_expr_parse(),
  22. av_expr_eval(),
  23. av_expr_free().
  24. 2010-11-08 - r25707 - lavfi 1.59.0 - avfilter_free()
  25. Rename avfilter_destroy() to avfilter_free().
  26. This change breaks libavfilter API/ABI.
  27. 2010-11-07 - r25705 - lavfi 1.58.0 - avfiltergraph.h
  28. Remove graphparser.h header, move AVFilterInOut and
  29. avfilter_graph_parse() declarations to libavfilter/avfiltergraph.h.
  30. 2010-11-07 - r25700 - lavfi 1.57.0 - AVFilterInOut
  31. Rename field AVFilterInOut.filter to AVFilterInOut.filter_ctx.
  32. This change breaks libavfilter API.
  33. 2010-11-04 - r25674 - lavfi 1.56.0 - avfilter_graph_free()
  34. Rename avfilter_graph_destroy() to avfilter_graph_free().
  35. This change breaks libavfilter API/ABI.
  36. 2010-11-04 - r25673 - lavfi 1.55.0 - avfilter_graph_alloc()
  37. Add avfilter_graph_alloc() to libavfilter/avfiltergraph.h.
  38. 2010-11-02 - r25654 - lavcore 0.12.0 - av_get_bits_per_sample_fmt()
  39. Add av_get_bits_per_sample_fmt() to libavcore/samplefmt.h and
  40. deprecate av_get_bits_per_sample_format().
  41. 2010-11-02 - r25653 - lavcore 0.11.0 - samplefmt.h
  42. Add sample format functions in libavcore/samplefmt.h:
  43. av_get_sample_fmt_name(),
  44. av_get_sample_fmt(),
  45. av_get_sample_fmt_string(),
  46. and deprecate the corresponding libavcodec/audioconvert.h functions:
  47. avcodec_get_sample_fmt_name(),
  48. avcodec_get_sample_fmt(),
  49. avcodec_sample_fmt_string().
  50. 2010-11-02 - r25652 - lavcore 0.10.0 - samplefmt.h
  51. Define enum AVSampleFormat in libavcore/samplefmt.h, deprecate enum
  52. SampleFormat.
  53. 2010-10-16 - r25502 - lavfi 1.52.0 - avfilter_graph_config()
  54. Add the function avfilter_graph_config() in avfiltergraph.h.
  55. 2010-10-15 - r25493 - lavf 52.83.0 - metadata API
  56. Change demuxers to export metadata in generic format and
  57. muxers to accept generic format. Deprecate the public
  58. conversion API.
  59. 2010-10-10 - r25441 - lavfi 1.49.0 - AVFilterLink.time_base
  60. Add time_base field to AVFilterLink.
  61. 2010-09-27 - r25236 - lavu 50.31.0 - av_set_options_string()
  62. Move av_set_options_string() from libavfilter/parseutils.h to
  63. libavutil/opt.h.
  64. 2010-09-27 - r25227 - lavfi 1.47.0 - AVFilterLink
  65. Make the AVFilterLink fields srcpad and dstpad store the pointers to
  66. the source and destination pads, rather than their indexes.
  67. 2010-09-27 - r25225 - lavu 50.30.0 - av_get_token()
  68. Move av_get_token() from libavfilter/parseutils.h to
  69. libavutil/avstring.h.
  70. 2010-09-26 - r32368 - lsws 0.12.0 - swscale.h
  71. Add the functions sws_alloc_context() and sws_init_context().
  72. 2010-09-26 - r25210 - lavu 50.29.0 - opt.h
  73. Move libavcodec/opt.h to libavutil/opt.h.
  74. 2010-09-24 - r25174 - lavu 50.28.0 - av_log_set_flags()
  75. Default of av_log() changed due to many problems to the old no repeat
  76. detection. Read the docs of AV_LOG_SKIP_REPEATED in log.h before
  77. enabling it for your app!.
  78. 2010-09-24 - r25167 - lavc 52.90.0 - av_opt_show2()
  79. Deprecate av_opt_show() in favor or av_opt_show2().
  80. 2010-09-14 - r25120 - lavu 50.27.0 - av_popcount()
  81. Add av_popcount() to libavutil/common.h.
  82. 2010-09-08 - r25076 - lavu 50.26.0 - av_get_cpu_flags()
  83. Add av_get_cpu_flags().
  84. 2010-09-07 - r25067 - lavcore 0.9.0 - av_image_copy()
  85. Add av_image_copy().
  86. 2010-09-07 - r25064 - lavcore 0.8.0 - av_image_copy_plane()
  87. Add av_image_copy_plane().
  88. 2010-09-07 - r25057 - lavcore 0.7.0 - imgutils.h
  89. Adopt hierarchical scheme for the imgutils.h function names,
  90. deprecate the old names.
  91. 2010-09-04 - r25040 - lavu 50.25.0 - AV_CPU_FLAG_*
  92. Deprecate the FF_MM_* flags defined in libavcodec/avcodec.h in favor
  93. of the AV_CPU_FLAG_* flags defined in libavutil/cpu.h.
  94. 2010-08-26 - r24936 - lavc 52.87.0 - avcodec_get_channel_layout()
  95. Add avcodec_get_channel_layout() in audioconvert.h.
  96. 2010-08-20 - r24851 - lavcore 0.6.0 - av_fill_image_max_pixsteps()
  97. Rename av_fill_image_max_pixstep() to av_fill_image_max_pixsteps().
  98. 2010-08-18 - r24827 - lavcore 0.5.0 - av_fill_image_max_pixstep()
  99. Add av_fill_image_max_pixstep() in imgutils.h.
  100. 2010-08-17 - r24814 - lavu 50.24.0 - AV_NE()
  101. Add the AV_NE macro.
  102. 2010-08-17 - r24811 - lavfi 1.36.0 - audio framework
  103. Implement AVFilterBufferRefAudioProps struct for audio properties,
  104. get_audio_buffer(), filter_samples() functions and related changes.
  105. 2010-08-12 - r24787 - lavcore 0.4.0 - av_get_image_linesize()
  106. Add av_get_image_linesize() in imgutils.h.
  107. 2010-08-11 - r24773 - lavfi 1.34.0 - AVFilterBufferRef
  108. Resize data and linesize arrays in AVFilterBufferRef to 8.
  109. This change breaks libavfilter API/ABI.
  110. 2010-08-11 - r24768 - lavc 52.85.0 - av_picture_data_copy()
  111. Add av_picture_data_copy in avcodec.h.
  112. 2010-08-11 - r24765 - lavfi 1.33.0 - avfilter_open()
  113. Change avfilter_open() signature:
  114. AVFilterContext *avfilter_open(AVFilter *filter, const char *inst_name) ->
  115. int avfilter_open(AVFilterContext **filter_ctx, AVFilter *filter, const char *inst_name);
  116. This change breaks libavfilter API/ABI.
  117. 2010-08-11 - r24763 - lavfi 1.32.0 - AVFilterBufferRef
  118. Add a type field to AVFilterBufferRef, and move video specific
  119. properties to AVFilterBufferRefVideoProps.
  120. This change breaks libavfilter API/ABI.
  121. 2010-08-07 - r24732 - lavfi 1.31.0 - AVFilterLink
  122. Rename AVFilterLink fields:
  123. AVFilterLink.srcpic -> AVFilterLink.src_buf
  124. AVFilterLink.cur_pic -> AVFilterLink.cur_buf
  125. AVFilterLink.outpic -> AVFilterLink.out_buf
  126. 2010-08-07 - r24731 - lavfi 1.30.0
  127. Rename functions and fields:
  128. avfilter_(un)ref_pic -> avfilter_(un)ref_buffer
  129. avfilter_copy_picref_props -> avfilter_copy_buffer_ref_props
  130. AVFilterBufferRef.pic -> AVFilterBufferRef.buffer
  131. 2010-08-07 - r24730 - lavfi 1.29.0 - AVFilterBufferRef
  132. Rename AVFilterPicRef to AVFilterBufferRef.
  133. 2010-08-07 - r24728 - lavfi 1.28.0 - AVFilterBuffer
  134. Move format field from AVFilterBuffer to AVFilterPicRef.
  135. 2010-08-06 - r24709 - lavcore 0.3.0 - av_check_image_size()
  136. Deprecate avcodec_check_dimensions() in favor of the function
  137. av_check_image_size() defined in libavcore/imgutils.h.
  138. 2010-07-30 - r24592 - lavfi 1.27.0 - AVFilterBuffer
  139. Increase size of the arrays AVFilterBuffer.data and
  140. AVFilterBuffer.linesize from 4 to 8.
  141. This change breaks libavfilter ABI.
  142. 2010-07-29 - r24583 - lavcore 0.2.0 - imgutils.h
  143. Add functions av_fill_image_linesizes() and
  144. av_fill_image_pointers(), declared in libavcore/imgutils.h.
  145. 2010-07-27 - r24518 - lavcore 0.1.0 - parseutils.h
  146. Deprecate av_parse_video_frame_size() and av_parse_video_frame_rate()
  147. defined in libavcodec in favor of the newly added functions
  148. av_parse_video_size() and av_parse_video_rate() declared in
  149. libavcore/parseutils.h.
  150. 2010-07-23 - r24439 - lavu 50.23.0 - mathematics.h
  151. Add the M_PHI constant definition.
  152. 2010-07-22 - r24424 - lavfi 1.26.0 - media format generalization
  153. Add a type field to AVFilterLink.
  154. Change the field types:
  155. enum PixelFormat format -> int format in AVFilterBuffer
  156. enum PixelFormat *formats -> int *formats in AVFilterFormats
  157. enum PixelFormat *format -> int format in AVFilterLink
  158. Change the function signatures:
  159. AVFilterFormats *avfilter_make_format_list(const enum PixelFormat *pix_fmts); ->
  160. AVFilterFormats *avfilter_make_format_list(const int *fmts);
  161. int avfilter_add_colorspace(AVFilterFormats **avff, enum PixelFormat pix_fmt); ->
  162. int avfilter_add_format (AVFilterFormats **avff, int fmt);
  163. AVFilterFormats *avfilter_all_colorspaces(void); ->
  164. AVFilterFormats *avfilter_all_formats (enum AVMediaType type);
  165. This change breaks libavfilter API/ABI.
  166. 2010-07-21 - r24393 - lavcore 0.0.0
  167. Add libavcore.
  168. 2010-07-17 - r24291 - lavfi 1.25.0 - AVFilterBuffer
  169. Remove w and h fields from AVFilterBuffer.
  170. 2010-07-17 - r24284 - lavfi 1.24.0 - AVFilterBuffer
  171. Rename AVFilterPic to AVFilterBuffer.
  172. 2010-07-17 - r24278 - lavf 52.74.0 - url_fskip()
  173. Make url_fskip() return an int error code instead of void.
  174. 2010-07-11 - r24199 - lavc 52.83.0
  175. Add AVCodecContext.lpc_type and AVCodecContext.lpc_passes fields.
  176. Add AVLPCType enum.
  177. Deprecate AVCodecContext.use_lpc.
  178. 2010-07-11 - r24185 - lavc 52.82.0 - avsubtitle_free()
  179. Add a function for free the contents of a AVSubtitle generated by
  180. avcodec_decode_subtitle.
  181. 2010-07-11 - r24174 - lavu 50.22.0 - bswap.h and intreadwrite.h
  182. Make the bswap.h and intreadwrite.h API public.
  183. 2010-07-08 - r24101 - lavu 50.21.0 - pixdesc.h
  184. Rename read/write_line() to av_read/write_image_line().
  185. 2010-07-07 - r24091 - lavfi 1.21.0 - avfilter_copy_picref_props()
  186. Add avfilter_copy_picref_props().
  187. 2010-07-03 - r24021 - lavc 52.79.0
  188. Add FF_COMPLIANCE_UNOFFICIAL and change all instances of
  189. FF_COMPLIANCE_INOFFICIAL to use FF_COMPLIANCE_UNOFFICIAL.
  190. 2010-07-02 - r23985 - lavu 50.20.0 - lfg.h
  191. Export av_lfg_init(), av_lfg_get(), av_mlfg_get(), and av_bmg_get() through
  192. lfg.h.
  193. 2010-06-28 - r23835 - lavfi 1.20.1 - av_parse_color()
  194. Extend av_parse_color() syntax, make it accept an alpha value specifier and
  195. set the alpha value to 255 by default.
  196. 2010-06-22 - r23706 - lavf 52.71.0 - URLProtocol.priv_data_size, priv_data_class
  197. Add priv_data_size and priv_data_class to URLProtocol.
  198. 2010-06-22 - r23704 - lavf 52.70.0 - url_alloc(), url_connect()
  199. Add url_alloc() and url_connect().
  200. 2010-06-22 - r23702 - lavf 52.69.0 - av_register_protocol2()
  201. Add av_register_protocol2(), deprecating av_register_protocol().
  202. 2010-06-09 - r23551 - lavu 50.19.0 - av_compare_mod()
  203. Add av_compare_mod() to libavutil/mathematics.h.
  204. 2010-06-05 - r23485 - lavu 50.18.0 - eval API
  205. Make the eval API public.
  206. 2010-06-04 - r23461 - lavu 50.17.0 - AV_BASE64_SIZE
  207. Add AV_BASE64_SIZE() macro.
  208. 2010-06-02 - r23421 - lavc 52.73.0 - av_get_codec_tag_string()
  209. Add av_get_codec_tag_string().
  210. 2010-06-01 - r31301 - lsws 0.11.0 - convertPalette API
  211. Add sws_convertPalette8ToPacked32() and sws_convertPalette8ToPacked24().
  212. 2010-05-26 - r23334 - lavc 52.72.0 - CODEC_CAP_EXPERIMENTAL
  213. Add CODEC_CAP_EXPERIMENTAL flag.
  214. 2010-05-23 - r23255 - lavu 50.16.0 - av_get_random_seed()
  215. Add av_get_random_seed().
  216. 2010-05-18 - r23161 - lavf 52.63.0 - AVFMT_FLAG_RTP_HINT
  217. Add AVFMT_FLAG_RTP_HINT as possible value for AVFormatContext.flags.
  218. 2010-05-09 - r23066 - lavfi 1.20.0 - AVFilterPicRef
  219. Add interlaced and top_field_first fields to AVFilterPicRef.
  220. 2010-05-01 - r23002 - lavf 52.62.0 - probe function
  221. Add av_probe_input_format2 to API, it allows ignoring probe
  222. results below given score and returns the actual probe score.
  223. 2010-04-01 - r22806 - lavf 52.61.0 - metadata API
  224. Add a flag for av_metadata_set2() to disable overwriting of
  225. existing tags.
  226. 2010-04-01 - r22753 - lavc 52.66.0
  227. Add avcodec_get_edge_width().
  228. 2010-03-31 - r22750 - lavc 52.65.0
  229. Add avcodec_copy_context().
  230. 2010-03-31 - r22748 - lavf 52.60.0 - av_match_ext()
  231. Make av_match_ext() public.
  232. 2010-03-31 - r22736 - lavu 50.14.0 - AVMediaType
  233. Move AVMediaType enum from libavcodec to libavutil.
  234. 2010-03-31 - r22735 - lavc 52.64.0 - AVMediaType
  235. Define AVMediaType enum, and use it instead of enum CodecType, which
  236. is deprecated and will be dropped at the next major bump.
  237. 2010-03-25 - r22684 - lavu 50.13.0 - av_strerror()
  238. Implement av_strerror().
  239. 2010-03-23 - r22649 - lavc 52.60.0 - av_dct_init()
  240. Support DCT-I and DST-I.
  241. 2010-03-15 - r22540 - lavf 52.56.0 - AVFormatContext.start_time_realtime
  242. Add AVFormatContext.start_time_realtime field.
  243. 2010-03-13 - r22506 - lavfi 1.18.0 - AVFilterPicRef.pos
  244. Add AVFilterPicRef.pos field.
  245. 2010-03-13 - r22501 - lavu 50.12.0 - error.h
  246. Move error code definitions from libavcodec/avcodec.h to
  247. the new public header libavutil/error.h.
  248. 2010-03-07 - r22291 - lavc 52.56.0 - avfft.h
  249. Add public FFT interface.
  250. 2010-03-06 - r22251 - lavu 50.11.0 - av_stristr()
  251. Add av_stristr().
  252. 2010-03-03 - r22174 - lavu 50.10.0 - av_tree_enumerate()
  253. Add av_tree_enumerate().
  254. 2010-02-07 - r21673 - lavu 50.9.0 - av_compare_ts()
  255. Add av_compare_ts().
  256. 2010-02-05 - r30513 - lsws 0.10.0 - sws_getCoefficients()
  257. Add sws_getCoefficients().
  258. 2010-02-01 - r21587 - lavf 52.50.0 - metadata API
  259. Add a list of generic tag names, change 'author' -> 'artist',
  260. 'year' -> 'date'.
  261. 2010-01-30 - r21545 - lavu 50.8.0 - av_get_pix_fmt()
  262. Add av_get_pix_fmt().
  263. 2010-01-21 - r30381 - lsws 0.9.0 - sws_scale()
  264. Change constness attributes of sws_scale() parameters.
  265. 2010-01-10 - r21121 - lavfi 1.15.0 - avfilter_graph_config_links()
  266. Add a log_ctx parameter to avfilter_graph_config_links().
  267. 2010-01-07 - r30236 - lsws 0.8.0 - sws_isSupported{In,Out}put()
  268. Add sws_isSupportedInput() and sws_isSupportedOutput() functions.
  269. 2010-01-06 - r21035 - lavfi 1.14.0 - avfilter_add_colorspace()
  270. Change the avfilter_add_colorspace() signature, make it accept an
  271. (AVFilterFormats **) rather than an (AVFilterFormats *) as before.
  272. 2010-01-03 - r21007 - lavfi 1.13.0 - avfilter_add_colorspace()
  273. Add avfilter_add_colorspace().
  274. 2010-01-02 - r20998 - lavf 52.46.0 - av_match_ext()
  275. Add av_match_ext(), it should be used in place of match_ext().
  276. 2010-01-01 - r20991 - lavf 52.45.0 - av_guess_format()
  277. Add av_guess_format(), it should be used in place of guess_format().
  278. 2009-12-13 - r20834 - lavf 52.43.0 - metadata API
  279. Add av_metadata_set2(), AV_METADATA_DONT_STRDUP_KEY and
  280. AV_METADATA_DONT_STRDUP_VAL.
  281. 2009-12-13 - r20829 - lavu 50.7.0 - avstring.h API
  282. Add av_d2str().
  283. 2009-12-13 - r20826 - lavc 52.42.0 - AVStream
  284. Add avg_frame_rate.
  285. 2009-12-12 - r20808 - lavu 50.6.0 - av_bmg_next()
  286. Introduce the av_bmg_next() function.
  287. 2009-12-05 - r20734 - lavfi 1.12.0 - avfilter_draw_slice()
  288. Add a slice_dir parameter to avfilter_draw_slice().
  289. 2009-11-26 - r20611 - lavfi 1.11.0 - AVFilter
  290. Remove the next field from AVFilter, this is not anymore required.
  291. 2009-11-25 - r20607 - lavfi 1.10.0 - avfilter_next()
  292. Introduce the avfilter_next() function.
  293. 2009-11-25 - r20605 - lavfi 1.9.0 - avfilter_register()
  294. Change the signature of avfilter_register() to make it return an
  295. int. This is required since now the registration operation may fail.
  296. 2009-11-25 - r20603 - lavu 50.5.0 - pixdesc.h API
  297. Make the pixdesc.h API public.
  298. 2009-10-27 - r20385 - lavfi 1.5.0 - AVFilter.next
  299. Add a next field to AVFilter, this is used for simplifying the
  300. registration and management of the registered filters.
  301. 2009-10-23 - r20356 - lavfi 1.4.1 - AVFilter.description
  302. Add a description field to AVFilter.
  303. 2009-10-19 - r20302 - lavfi 1.3.0 - avfilter_make_format_list()
  304. Change the interface of avfilter_make_format_list() from
  305. avfilter_make_format_list(int n, ...) to
  306. avfilter_make_format_list(enum PixelFormat *pix_fmts).
  307. 2009-10-18 - r20272 - lavfi 1.0.0 - avfilter_get_video_buffer()
  308. Make avfilter_get_video_buffer() recursive and add the w and h
  309. parameters to it.
  310. 2009-10-07 - r20189 - lavfi 0.5.1 - AVFilterPic
  311. Add w and h fields to AVFilterPic.
  312. 2009-06-22 - r19250 - lavf 52.34.1 - AVFormatContext.packet_size
  313. This is now an unsigned int instead of a signed int.
  314. 2009-06-19 - r19222 - lavc 52.32.0 - AVSubtitle.pts
  315. Add a pts field to AVSubtitle which gives the subtitle packet pts
  316. in AV_TIME_BASE. Some subtitle de-/encoders (e.g. XSUB) will
  317. not work right without this.
  318. 2009-06-03 - r19078 - lavc 52.30.2 - AV_PKT_FLAG_KEY
  319. PKT_FLAG_KEY has been deprecated and will be dropped at the next
  320. major version. Use AV_PKT_FLAG_KEY instead.
  321. 2009-06-01 - r19025 - lavc 52.30.0 - av_lockmgr_register()
  322. av_lockmgr_register() can be used to register a callback function
  323. that lavc (and in the future, libraries that depend on lavc) can use
  324. to implement mutexes. The application should provide a callback function
  325. that implements the AV_LOCK_* operations described in avcodec.h.
  326. When the lock manager is registered, FFmpeg is guaranteed to behave
  327. correctly in a multi-threaded application.
  328. 2009-04-30 - r18719 - lavc 52.28.0 - av_free_packet()
  329. av_free_packet() is no longer an inline function. It is now exported.
  330. 2009-04-11 - r18431 - lavc 52.25.0 - deprecate av_destruct_packet_nofree()
  331. Please use NULL instead. This has been supported since r16506
  332. (lavf > 52.23.1, lavc > 52.10.0).
  333. 2009-04-07 - r18351 - lavc 52.23.0 - avcodec_decode_video/audio/subtitle
  334. The old decoding functions are deprecated, all new code should use the
  335. new functions avcodec_decode_video2(), avcodec_decode_audio3() and
  336. avcodec_decode_subtitle2(). These new functions take an AVPacket *pkt
  337. argument instead of a const uint8_t *buf / int buf_size pair.
  338. 2009-04-03 - r18321 - lavu 50.3.0 - av_fifo_space()
  339. Introduce the av_fifo_space() function.
  340. 2009-04-02 - r18317 - lavc 52.23.0 - AVPacket
  341. Move AVPacket declaration from libavformat/avformat.h to
  342. libavcodec/avcodec.h.
  343. 2009-03-22 - r18163 - lavu 50.2.0 - RGB32 pixel formats
  344. Convert the pixel formats PIX_FMT_ARGB, PIX_FMT_RGBA, PIX_FMT_ABGR,
  345. PIX_FMT_BGRA, which were defined as macros, into enum PixelFormat values.
  346. Conversely PIX_FMT_RGB32, PIX_FMT_RGB32_1, PIX_FMT_BGR32 and
  347. PIX_FMT_BGR32_1 are now macros.
  348. avcodec_get_pix_fmt() now recognizes the "rgb32" and "bgr32" aliases.
  349. Re-sort the enum PixelFormat list accordingly.
  350. This change breaks API/ABI backward compatibility.
  351. 2009-03-22 - r18133 - lavu 50.1.0 - PIX_FMT_RGB5X5 endian variants
  352. Add the enum PixelFormat values:
  353. PIX_FMT_RGB565BE, PIX_FMT_RGB565LE, PIX_FMT_RGB555BE, PIX_FMT_RGB555LE,
  354. PIX_FMT_BGR565BE, PIX_FMT_BGR565LE, PIX_FMT_BGR555BE, PIX_FMT_BGR555LE.
  355. 2009-03-21 - r18116 - lavu 50.0.0 - av_random*
  356. The Mersenne Twister PRNG implemented through the av_random* functions
  357. was removed. Use the lagged Fibonacci PRNG through the av_lfg* functions
  358. instead.
  359. 2009-03-08 - r17869 - lavu 50.0.0 - AVFifoBuffer
  360. av_fifo_init, av_fifo_read, av_fifo_write and av_fifo_realloc were dropped
  361. and replaced by av_fifo_alloc, av_fifo_generic_read, av_fifo_generic_write
  362. and av_fifo_realloc2.
  363. In addition, the order of the function arguments of av_fifo_generic_read
  364. was changed to match av_fifo_generic_write.
  365. The AVFifoBuffer/struct AVFifoBuffer may only be used in an opaque way by
  366. applications, they may not use sizeof() or directly access members.
  367. 2009-03-01 - r17682 - lavf 52.31.0 - Generic metadata API
  368. Introduce a new metadata API (see av_metadata_get() and friends).
  369. The old API is now deprecated and should not be used anymore. This especially
  370. includes the following structure fields:
  371. - AVFormatContext.title
  372. - AVFormatContext.author
  373. - AVFormatContext.copyright
  374. - AVFormatContext.comment
  375. - AVFormatContext.album
  376. - AVFormatContext.year
  377. - AVFormatContext.track
  378. - AVFormatContext.genre
  379. - AVStream.language
  380. - AVStream.filename
  381. - AVProgram.provider_name
  382. - AVProgram.name
  383. - AVChapter.title