doc/APIchanges

   1 Never assume the API of libav* to be stable unless at least 1 month has passed
   2 since the last major version increase.
   3
   4 The last version increases were:
   5 libavcodec:    2012-01-27
   6 libavdevice:   2011-04-18
   7 libavfilter:   2012-06-22
   8 libavformat:   2012-01-27
   9 libavresample: 2012-10-05
  10 libswscale:    2011-06-20
  11 libavutil:     2012-10-22
  12
  13
  14 API changes, most recent first:
  15
  16 2012-xx-xx - xxxxxxx - lavu 52.1.0 - intmath.h
  17   Add av_ctz() for trailing zero bit count
  18
  19 2012-10-18 - xxxxxxx - lavu 51.45.0 - error.h
  20   Add AVERROR_EXPERIMENTAL
  21
  22 2012-10-12 - xxxxxxx - lavu 51.44.0 - pixdesc.h
  23   Add functions for accessing pixel format descriptors.
  24   Accessing the av_pix_fmt_descriptors array directly is now
  25   deprecated.
  26
  27 2012-10-xx - xxxxxxx - lavu 51.43.0 - aes.h, md5.h, sha.h, tree.h
  28   Add functions for allocating the opaque contexts for the algorithms,
  29   deprecate the context size variables.
  30
  31 2012-10-xx - xxxxxxx - lavf 54.18.0 - avio.h
  32   Add avio_closep to complement avio_close.
  33
  34 2012-10-xx - xxxxxxx - lavu 51.42.0 - pixfmt.h
  35   Rename PixelFormat to AVPixelFormat and all PIX_FMT_* to AV_PIX_FMT_*.
  36   To provide backwards compatibility, PixelFormat is now #defined as
  37   AVPixelFormat.
  38   Note that this can break user code that includes pixfmt.h and uses the
  39   'PixelFormat' identifier. Such code should either #undef PixelFormat
  40   or stop using the PixelFormat name.
  41
  42 2012-10-05 - e7ba5b1 - lavr 1.0.0 - avresample.h
  43   Data planes parameters to avresample_convert() and
  44   avresample_read() are now uint8_t** instead of void**.
  45   Libavresample is now stable.
  46
  47 2012-09-24 - a42aada - lavc 54.28.0 - avcodec.h
  48   Add avcodec_free_frame(). This function must now
  49   be used for freeing an AVFrame.
  50
  51 2012-09-12 - 8919fee - lavu 51.41.0 - audioconvert.h
  52   Added AV_CH_LOW_FREQUENCY_2 channel mask value.
  53
  54 2012-09-04 - 686a329 - lavu 51.40.0 - opt.h
  55   Reordered the fields in default_val in AVOption, changed which
  56   default_val field is used for which AVOptionType.
  57
  58 2012-08-30 - a231832 - lavc 54.26.1 - avcodec.h
  59   Add codec descriptor properties AV_CODEC_PROP_LOSSY and
  60   AV_CODEC_PROP_LOSSLESS.
  61
  62 2012-08-18 - lavc 54.26 - avcodec.h
  63   Add codec descriptors for accessing codec properties without having
  64   to refer to a specific decoder or encoder.
  65
  66   c223d79 - Add an AVCodecDescriptor struct and functions
  67             avcodec_descriptor_get() and avcodec_descriptor_next().
  68   51efed1 - Add AVCodecDescriptor.props and AV_CODEC_PROP_INTRA_ONLY.
  69   91e59fe - Add avcodec_descriptor_get_by_name().
  70
  71
  72 2012-08-08 - 1d9c2dc - lavu 51.39 - avutil.h
  73   Don't implicitly include libavutil/common.h in avutil.h
  74
  75 2012-08-08 - 987170c - lavu 51.38 - dict.h
  76   Add av_dict_count().
  77
  78 2012-08-07 - 104e10f - lavc 54.25 - avcodec.h
  79   Rename CodecID to AVCodecID and all CODEC_ID_* to AV_CODEC_ID_*.
  80   To provide backwards compatibility, CodecID is now #defined as AVCodecID.
  81   Note that this can break user code that includes avcodec.h and uses the
  82   'CodecID' identifier. Such code should either #undef CodecID or stop using the
  83   CodecID name.
  84
  85 2012-08-03 - 239fdf1 - lavu 51.37.1 - cpu.h
  86                        lsws 2.1.1   - swscale.h
  87   Rename AV_CPU_FLAG_MMX2  ---> AV_CPU_FLAG_MMXEXT.
  88   Rename SWS_CPU_CAPS_MMX2 ---> SWS_CPU_CAPS_MMXEXT.
  89
  90 2012-07-29 - 681ed00 - lavf 54.13.0 - avformat.h
  91   Add AVFMT_FLAG_NOBUFFER for low latency use cases.
  92
  93 2012-07-20 - b70d89a - lavfi 3.0.0 - avfilter.h
  94   Add avfilter_unref_bufferp().
  95
  96 2012-07-10 - 5fade8a - lavu 51.37.0
  97   Add av_malloc_array() and av_mallocz_array()
  98
  99 2012-06-22 - d3d3a32 - lavu 51.34.0
 100   Add av_usleep()
 101
 102 2012-06-20 - ae0a301 - lavu 51.33.0
 103   Move av_gettime() to libavutil, add libavutil/time.h
 104
 105 2012-06-09 - 3971be0 - lavr 0.0.3
 106   Add a parameter to avresample_build_matrix() for Dolby/DPLII downmixing.
 107
 108 2012-06-12 - 9baeff9 - lavfi 2.23.0 - avfilter.h
 109   Add AVFilterContext.nb_inputs/outputs. Deprecate
 110   AVFilterContext.input/output_count.
 111
 112 2012-06-12 - 84b9fbe - lavfi 2.22.0 - avfilter.h
 113   Add avfilter_pad_get_type() and avfilter_pad_get_name(). Those
 114   should now be used instead of accessing AVFilterPad members
 115   directly.
 116
 117 2012-06-12 - b0f0dfc - lavu 51.32.0 - audioconvert.h
 118   Add av_get_channel_layout_channel_index(), av_get_channel_name()
 119   and av_channel_layout_extract_channel().
 120
 121 2012-05-25 - 154486f - lavu 51.31.0 - opt.h
 122   Add av_opt_set_bin()
 123
 124 2012-05-26 - e9cef89 - lavf 54.3.0
 125   Add AVFMT_TS_NONSTRICT format flag to indicate that a muxer supports
 126   non-increasing monotone timestamps.
 127
 128 2012-05-15 - lavfi 2.17.0
 129   Add support for audio filters
 130   ac71230/a2cd9be - add video/audio buffer sink in a new installed
 131                     header buffersink.h
 132   720c6b7 - add av_buffersrc_write_frame(), deprecate
 133             av_vsrc_buffer_add_frame()
 134   ab16504 - add avfilter_copy_buf_props()
 135   9453c9e - add extended_data to AVFilterBuffer
 136   1b8c927 - add avfilter_get_audio_buffer_ref_from_arrays()
 137
 138 2012-05-09 - lavu 51.30.0 - samplefmt.h
 139   142e740 - add av_samples_copy()
 140   6d7f617 - add av_samples_set_silence()
 141
 142 2012-05-09 - a5117a2 - lavc 54.13.1
 143   For audio formats with fixed frame size, the last frame
 144   no longer needs to be padded with silence, libavcodec
 145   will handle this internally (effectively all encoders
 146   behave as if they had CODEC_CAP_SMALL_LAST_FRAME set).
 147
 148 2012-05-07 - 828bd08 - lavc 54.13.0 - avcodec.h
 149   Add sample_rate and channel_layout fields to AVFrame.
 150
 151 2012-05-01 - 4010d72 - lavr 0.0.1
 152   Change AV_MIX_COEFF_TYPE_Q6 to AV_MIX_COEFF_TYPE_Q8.
 153
 154 2012-04-25 - 3527a73 - lavu 51.29.0 - cpu.h
 155   Add av_parse_cpu_flags()
 156
 157 2012-04-24 - c8af852 - lavr 0.0.0
 158   Add libavresample audio conversion library
 159
 160 2012-04-20 - 0c0d1bc - lavu 51.28.0 - audio_fifo.h
 161   Add audio FIFO functions:
 162     av_audio_fifo_free()
 163     av_audio_fifo_alloc()
 164     av_audio_fifo_realloc()
 165     av_audio_fifo_write()
 166     av_audio_fifo_read()
 167     av_audio_fifo_drain()
 168     av_audio_fifo_reset()
 169     av_audio_fifo_size()
 170     av_audio_fifo_space()
 171
 172 2012-04-14 - lavfi 2.16.0 - avfiltergraph.h
 173   d7bcc71 Add avfilter_graph_parse2().
 174   91d3cbe Add avfilter_inout_alloc() and avfilter_inout_free().
 175
 176 2012-04-08 - 4d693b0 - lavu 51.27.0 - samplefmt.h
 177   Add av_get_packed_sample_fmt() and av_get_planar_sample_fmt()
 178
 179 2012-04-05 - 5cc51a5 - lavu 51.26.0 - audioconvert.h
 180   Add av_get_default_channel_layout()
 181
 182 2012-03-06 - 4d851f8 - lavu 51.25.0 - cpu.h
 183   Add av_set_cpu_flags_mask().
 184
 185 2012-03-05 - lavc 54.8.0
 186   6699d07 Add av_get_exact_bits_per_sample()
 187   9524cf7 Add av_get_audio_frame_duration()
 188
 189 2012-03-04 - 44fe77b - lavc 54.7.0 - avcodec.h
 190   Add av_codec_is_encoder/decoder().
 191
 192 2012-03-01 - 442c132 - lavc 54.3.0 - avcodec.h
 193   Add av_packet_shrink_side_data.
 194
 195 2012-02-29 - dd2a4bc - lavf 54.2.0 - avformat.h
 196   Add AVStream.attached_pic and AV_DISPOSITION_ATTACHED_PIC,
 197   used for dealing with attached pictures/cover art.
 198
 199 2012-02-25 - c9bca80 - lavu 51.24.0 - error.h
 200   Add AVERROR_UNKNOWN
 201   NOTE: this was backported to 0.8
 202
 203 2012-02-20 - e9cda85 - lavc 54.2.0
 204   Add duration field to AVCodecParserContext
 205
 206 2012-02-20 - 0b42a93 - lavu 51.23.1 - mathematics.h
 207   Add av_rescale_q_rnd()
 208
 209 2012-02-08 - 38d5533 - lavu 51.22.1 - pixdesc.h
 210   Add PIX_FMT_PSEUDOPAL flag.
 211
 212 2012-02-08 - 52f82a1 - lavc 54.01.0
 213   Add avcodec_encode_video2() and deprecate avcodec_encode_video().
 214
 215 2012-02-01 - 316fc74 - lavc 54.01.0
 216   Add av_fast_padded_malloc() as alternative for av_realloc() when aligned
 217   memory is required. The buffer will always have FF_INPUT_BUFFER_PADDING_SIZE
 218   zero-padded bytes at the end.
 219
 220 2012-01-31 - dd6d3b0 - lavf 54.01.0
 221   Add avformat_get_riff_video_tags() and avformat_get_riff_audio_tags().
 222   NOTE: this was backported to 0.8
 223
 224 2012-01-31 - af08d9a - lavc 54.01.0
 225   Add avcodec_is_open() function.
 226   NOTE: this was backported to 0.8
 227
 228 2012-01-30 - 8b93312 - lavu 51.22.0 - intfloat.h
 229   Add a new installed header libavutil/intfloat.h with int/float punning
 230   functions.
 231   NOTE: this was backported to 0.8
 232
 233 2012-01-25 - lavf 53.22.0
 234   f1caf01 Allow doing av_write_frame(ctx, NULL) for flushing possible
 235           buffered data within a muxer. Added AVFMT_ALLOW_FLUSH for
 236           muxers supporting it (av_write_frame makes sure it is called
 237           only for muxers with this flag).
 238
 239 ------------------------------8<-------------------------------------
 240                    0.8 branch was cut here
 241 ----------------------------->8--------------------------------------
 242
 243 2012-01-15 - lavc 53.34.0
 244   New audio encoding API:
 245   b2c75b6 Add CODEC_CAP_VARIABLE_FRAME_SIZE capability for use by audio
 246           encoders.
 247   5ee5fa0 Add avcodec_fill_audio_frame() as a convenience function.
 248   b2c75b6 Add avcodec_encode_audio2() and deprecate avcodec_encode_audio().
 249           Add AVCodec.encode2().
 250
 251 2012-01-12 - 3167dc9 - lavfi 2.15.0
 252   Add a new installed header -- libavfilter/version.h -- with version macros.
 253
 254 2011-01-03 - b73ec05 - lavu 51.21.0
 255   Add av_popcount64
 256
 257 2011-12-25 - lavfi 2.14.0
 258   e1d9dbf Add a new installed header - buffersrc.h
 259   It contains a new function av_buffersrc_buffer() that allows passing
 260   frames to the 'buffer' filter, but unlike av_vsrc_buffer_add_frame()
 261   it allows for direct rendering.
 262   1c9e340 Add avfilter_copy_frame_props() for copying properties from
 263   AVFrame to AVFilterBufferRef.
 264
 265 2011-12-25 - lavc 53.31.0
 266   Add the following new fields to AVFrame:
 267     b58dbb5 sample_aspect_ratio
 268     3a2ddf7 width, height
 269     8a4a5f6 format
 270
 271 2011-12-18 - 8400b12 - lavc 53.28.1
 272   Deprecate AVFrame.age. The field is unused.
 273
 274 2011-12-12 - 5266045 - lavf 53.17.0
 275   Add avformat_close_input().
 276   Deprecate av_close_input_file() and av_close_input_stream().
 277
 278 2011-12-02 - 0eea212 - lavc 53.25.0
 279   Add nb_samples and extended_data fields to AVFrame.
 280   Deprecate AVCODEC_MAX_AUDIO_FRAME_SIZE.
 281   Deprecate avcodec_decode_audio3() in favor of avcodec_decode_audio4().
 282   avcodec_decode_audio4() writes output samples to an AVFrame, which allows
 283   audio decoders to use get_buffer().
 284
 285 2011-12-04 - 560f773 - lavc 53.24.0
 286   Change AVFrame.data[4]/base[4]/linesize[4]/error[4] to [8] at next major bump.
 287   Change AVPicture.data[4]/linesize[4] to [8] at next major bump.
 288   Change AVCodecContext.error[4] to [8] at next major bump.
 289   Add AV_NUM_DATA_POINTERS to simplify the bump transition.
 290
 291 2011-11-23 - bbb46f3 - lavu 51.18.0
 292   Add av_samples_get_buffer_size(), av_samples_fill_arrays(), and
 293   av_samples_alloc(), to samplefmt.h.
 294
 295 2011-11-23 - 8889cc4 - lavu 51.17.0
 296   Add planar sample formats and av_sample_fmt_is_planar() to samplefmt.h.
 297
 298 2011-11-19 - f3a29b7 - lavc 53.21.0
 299   Move some AVCodecContext fields to a new private struct, AVCodecInternal,
 300   which is accessed from a new field, AVCodecContext.internal.
 301   - fields moved:
 302       AVCodecContext.internal_buffer       --> AVCodecInternal.buffer
 303       AVCodecContext.internal_buffer_count --> AVCodecInternal.buffer_count
 304       AVCodecContext.is_copy               --> AVCodecInternal.is_copy
 305
 306 2011-11-16 - 6270671 - lavu 51.16.0
 307   Add av_timegm()
 308
 309 2011-11-13 - lavf 53.15.0
 310   New interrupt callback API, allowing per-AVFormatContext/AVIOContext
 311   interrupt callbacks.
 312   6aa0b98 Add AVIOInterruptCB struct and the interrupt_callback field to
 313           AVFormatContext.
 314   1dee0ac Add avio_open2() with additional parameters. Those are
 315           an interrupt callback and an options AVDictionary.
 316           This will allow passing AVOptions to protocols after lavf
 317           54.0.
 318
 319 2011-11-06 - ba04ecf - lavu 51.14.0
 320   Add av_strcasecmp() and av_strncasecmp() to avstring.h.
 321
 322 2011-11-06 - 07b172f - lavu 51.13.0
 323   Add av_toupper()/av_tolower()
 324
 325 2011-11-05 - b6d08f4 - lavf 53.13.0
 326   Add avformat_network_init()/avformat_network_deinit()
 327
 328 2011-10-27 - 512557b - lavc 53.15.0
 329   Remove avcodec_parse_frame.
 330   Deprecate AVCodecContext.parse_only and CODEC_CAP_PARSE_ONLY.
 331
 332 2011-10-19 - 569129a - lavf 53.10.0
 333   Add avformat_new_stream(). Deprecate av_new_stream().
 334
 335 2011-10-13 - b631fba - lavf 53.9.0
 336   Add AVFMT_NO_BYTE_SEEK AVInputFormat flag.
 337
 338 2011-10-12 - lavu 51.12.0
 339   AVOptions API rewrite.
 340
 341   - 145f741 FF_OPT_TYPE* renamed to AV_OPT_TYPE_*
 342   - new setting/getting functions with slightly different semantics:
 343         dac66da av_set_string3 -> av_opt_set
 344                 av_set_double  -> av_opt_set_double
 345                 av_set_q       -> av_opt_set_q
 346                 av_set_int     -> av_opt_set_int
 347
 348         41d9d51 av_get_string  -> av_opt_get
 349                 av_get_double  -> av_opt_get_double
 350                 av_get_q       -> av_opt_get_q
 351                 av_get_int     -> av_opt_get_int
 352
 353   - 8c5dcaa trivial rename av_next_option -> av_opt_next
 354   - 641c7af new functions - av_opt_child_next, av_opt_child_class_next
 355     and av_opt_find2()
 356
 357 2011-09-03 - fb4ca26 - lavc 53.10.0
 358                        lavf 53.6.0
 359                        lsws  2.1.0
 360   Add {avcodec,avformat,sws}_get_class().
 361
 362 2011-09-03 - c11fb82 - lavu 51.10.0
 363   Add AV_OPT_SEARCH_FAKE_OBJ flag for av_opt_find() function.
 364
 365 2011-08-26 - lavu 51.9.0
 366   - f2011ed Add av_fifo_peek2(), deprecate av_fifo_peek().
 367   - add41de..abc78a5 Do not include intfloat_readwrite.h,
 368     mathematics.h, rational.h, pixfmt.h, or log.h from avutil.h.
 369
 370 2011-08-16 - 48f9e45 - lavf 53.4.0
 371   Add avformat_query_codec().
 372
 373 2011-08-16 - bca06e7 - lavc 53.8.0
 374   Add avcodec_get_type().
 375
 376 2011-08-06 - 2f63440 - lavf 53.4.0
 377   Add error_recognition to AVFormatContext.
 378
 379 2011-08-02 - 9d39cbf - lavc 53.7.1
 380   Add AV_PKT_FLAG_CORRUPT AVPacket flag.
 381
 382 2011-07-10 - a67c061 - lavf 53.3.0
 383   Add avformat_find_stream_info(), deprecate av_find_stream_info().
 384   NOTE: this was backported to 0.7
 385
 386 2011-07-10 - 0b950fe - lavc 53.6.0
 387   Add avcodec_open2(), deprecate avcodec_open().
 388   NOTE: this was backported to 0.7
 389
 390   Add avcodec_alloc_context3. Deprecate avcodec_alloc_context() and
 391   avcodec_alloc_context2().
 392
 393 2011-06-23 - 67e9ae1 - lavu 51.8.0 - attributes.h
 394   Add av_printf_format().
 395
 396 ------------------------------8<-------------------------------------
 397                    0.7 branch was cut here
 398 ----------------------------->8--------------------------------------
 399
 400 2011-06-16 - 05e84c9, 25de595 - lavf 53.2.0 - avformat.h
 401   Add avformat_open_input and avformat_write_header().
 402   Deprecate av_open_input_stream, av_open_input_file,
 403   AVFormatParameters and av_write_header.
 404
 405 2011-06-16 - 7e83e1c, dc59ec5 - lavu 51.7.0 - opt.h
 406   Add av_opt_set_dict() and av_opt_find().
 407   Deprecate av_find_opt().
 408   Add AV_DICT_APPEND flag.
 409
 410 2011-06-10 - cb7c11c - lavu 51.6.0 - opt.h
 411   Add av_opt_flag_is_set().
 412
 413 2011-06-08 - d9f80ea - lavu 51.5.0 - AVMetadata
 414   Move AVMetadata from lavf to lavu and rename it to
 415   AVDictionary -- new installed header dict.h.
 416   All av_metadata_* functions renamed to av_dict_*.
 417
 418 2011-06-07 - a6703fa - lavu 51.4.0 - av_get_bytes_per_sample()
 419   Add av_get_bytes_per_sample() in libavutil/samplefmt.h.
 420   Deprecate av_get_bits_per_sample_fmt().
 421
 422 2011-06-05 - b39b062 - lavu 51.3.0 - opt.h
 423   Add av_opt_free convenience function.
 424
 425 2011-05-28 - 0420bd7 - lavu 51.2.0 - pixdesc.h
 426   Add av_get_pix_fmt_name() in libavutil/pixdesc.h, and deprecate
 427   avcodec_get_pix_fmt_name() in libavcodec/avcodec.h in its favor.
 428
 429 2011-05-25 - 30315a8 - lavf 53.1.0 - avformat.h
 430   Add fps_probe_size to AVFormatContext.
 431
 432 2011-05-18 - 64150ff - lavc 53.4.0 - AVCodecContext.request_sample_fmt
 433   Add request_sample_fmt field to AVCodecContext.
 434
 435 2011-05-10 - 188dea1 - lavc 53.3.0 - avcodec.h
 436   Deprecate AVLPCType and the following fields in
 437   AVCodecContext: lpc_coeff_precision, prediction_order_method,
 438   min_partition_order, max_partition_order, lpc_type, lpc_passes.
 439   Corresponding FLAC encoder options should be used instead.
 440
 441 2011-04-26 - bebe72f - lavu 51.1.0 - avutil.h
 442   Add AVPictureType enum and av_get_picture_type_char(), deprecate
 443   FF_*_TYPE defines and av_get_pict_type_char() defined in
 444   libavcodec/avcodec.h.
 445
 446 2011-04-26 - 10d3940 - lavfi 2.3.0 - avfilter.h
 447   Add pict_type and key_frame fields to AVFilterBufferRefVideo.
 448
 449 2011-04-26 - 7a11c82 - lavfi 2.2.0 - vsrc_buffer
 450   Add sample_aspect_ratio fields to vsrc_buffer arguments
 451
 452 2011-04-21 - 94f7451 - lavc 53.1.0 - avcodec.h
 453   Add CODEC_CAP_SLICE_THREADS for codecs supporting sliced threading.
 454
 455 2011-04-15 - lavc 52.120.0 - avcodec.h
 456   AVPacket structure got additional members for passing side information:
 457     4de339e introduce side information for AVPacket
 458     2d8591c make containers pass palette change in AVPacket
 459
 460 2011-04-12 - lavf 52.107.0 - avio.h
 461   Avio cleanup, part II - deprecate the entire URLContext API:
 462     175389c add avio_check as a replacement for url_exist
 463     ff1ec0c add avio_pause and avio_seek_time as replacements
 464             for _av_url_read_fseek/fpause
 465     cdc6a87 deprecate av_protocol_next(), avio_enum_protocols
 466             should be used instead.
 467     80c6e23 rename url_set_interrupt_cb->avio_set_interrupt_cb.
 468     f87b1b3 rename open flags: URL_* -> AVIO_*
 469     f8270bb add avio_enum_protocols.
 470     5593f03 deprecate URLProtocol.
 471     c486dad deprecate URLContext.
 472     026e175 deprecate the typedef for URLInterruptCB
 473     8e76a19 deprecate av_register_protocol2.
 474     b840484 deprecate URL_PROTOCOL_FLAG_NESTED_SCHEME
 475     1305d93 deprecate av_url_read_seek
 476     fa104e1 deprecate av_url_read_pause
 477     727c7aa deprecate url_get_filename().
 478     5958df3 deprecate url_max_packet_size().
 479     1869ea0 deprecate url_get_file_handle().
 480     32a97d4 deprecate url_filesize().
 481     e52a914 deprecate url_close().
 482     58a48c6 deprecate url_seek().
 483     925e908 deprecate url_write().
 484     dce3756 deprecate url_read_complete().
 485     bc371ac deprecate url_read().
 486     0589da0 deprecate url_open().
 487     62eaaea deprecate url_connect.
 488     5652bb9 deprecate url_alloc.
 489     333e894 deprecate url_open_protocol
 490     e230705 deprecate url_poll and URLPollEntry
 491
 492 2011-04-10 - lavu  50.40.0 - pixfmt.h
 493   Add PIX_FMT_BGR48LE and PIX_FMT_BGR48BE pixel formats
 494
 495 2011-04-08 - lavf 52.106.0 - avformat.h
 496   Minor avformat.h cleanup:
 497     a9bf9d8 deprecate av_guess_image2_codec
 498     c3675df rename avf_sdp_create->av_sdp_create
 499
 500 2011-04-03 - lavf 52.105.0 - avio.h
 501   Large-scale renaming/deprecating of AVIOContext-related functions:
 502     724f6a0 deprecate url_fdopen
 503     403ee83 deprecate url_open_dyn_packet_buf
 504     6dc7d80 rename url_close_dyn_buf       -> avio_close_dyn_buf
 505     b92c545 rename url_open_dyn_buf        -> avio_open_dyn_buf
 506     8978fed introduce an AVIOContext.seekable field as a replacement for
 507             AVIOContext.is_streamed and url_is_streamed()
 508     b64030f deprecate get_checksum()
 509     4c4427a deprecate init_checksum()
 510     4ec153b deprecate udp_set_remote_url/get_local_port
 511     933e90a deprecate av_url_read_fseek/fpause
 512     8d9769a deprecate url_fileno
 513     b7f2fdd rename put_flush_packet -> avio_flush
 514     35f1023 deprecate url_close_buf
 515     83fddae deprecate url_open_buf
 516     d9d86e0 rename url_fprintf -> avio_printf
 517     59f65d9 deprecate url_setbufsize
 518     3e68b3b deprecate url_ferror
 519     66e5b1d deprecate url_feof
 520     e8bb2e2 deprecate url_fget_max_packet_size
 521     76aa876 rename url_fsize -> avio_size
 522     e519753 deprecate url_fgetc
 523     655e45e deprecate url_fgets
 524     a2704c9 rename url_ftell -> avio_tell
 525     e16ead0 deprecate get_strz() in favor of avio_get_str
 526     0300db8,2af07d3 rename url_fskip -> avio_skip
 527     6b4aa5d rename url_fseek -> avio_seek
 528     61840b4 deprecate put_tag
 529     22a3212 rename url_fopen/fclose -> avio_open/close.
 530     0ac8e2b deprecate put_nbyte
 531     77eb550 rename put_byte          -> avio_w8
 532                    put_[b/l]e<type>  -> avio_w[b/l]<type>
 533                    put_buffer        -> avio_write
 534     b7effd4 rename get_byte          -> avio_r8,
 535                    get_[b/l]e<type>  -> avio_r[b/l]<type>
 536                    get_buffer        -> avio_read
 537     b3db9ce deprecate get_partial_buffer
 538     8d9ac96 rename av_alloc_put_byte -> avio_alloc_context
 539
 540 2011-03-25 - 34b47d7 - lavc 52.115.0 - AVCodecContext.audio_service_type
 541   Add audio_service_type field to AVCodecContext.
 542
 543 2011-03-02 - 863c471 - lavf  52.103.0 - av_pkt_dump2, av_pkt_dump_log2
 544   Add new functions av_pkt_dump2, av_pkt_dump_log2 that uses the
 545   source stream timebase for outputting timestamps. Deprecate
 546   av_pkt_dump and av_pkt_dump_log.
 547
 548 2011-02-20 - e731b8d - lavf  52.102.0 - avio.h
 549   * e731b8d - rename init_put_byte() to ffio_init_context(), deprecating the
 550               original, and move it to a private header so it is no longer
 551               part of our public API. Instead, use av_alloc_put_byte().
 552   * ae628ec - rename ByteIOContext to AVIOContext.
 553
 554 2011-02-16 - 09d171b - lavf  52.101.0 - avformat.h
 555                        lavu  52.39.0  - parseutils.h
 556   * 610219a - Add av_ prefix to dump_format().
 557   * f6c7375 - Replace parse_date() in lavf with av_parse_time() in lavu.
 558   * ab0287f - Move find_info_tag from lavf to lavu and add av_prefix to it.
 559
 560 2011-02-15 - lavu 52.38.0 - merge libavcore
 561   libavcore is merged back completely into libavutil
 562
 563 2011-02-10 - 55bad0c - lavc 52.113.0 - vbv_delay
 564   Add vbv_delay field to AVCodecContext
 565
 566 2011-02-14 - 24a83bd - lavf 52.100.0 - AV_DISPOSITION_CLEAN_EFFECTS
 567   Add AV_DISPOSITION_CLEAN_EFFECTS disposition flag.
 568
 569 2011-02-14 - 910b5b8 - lavfi 1.76.0 - AVFilterLink sample_aspect_ratio
 570   Add sample_aspect_ratio field to AVFilterLink.
 571
 572 2011-02-10 - 12c14cd - lavf 52.99.0 - AVStream.disposition
 573   Add AV_DISPOSITION_HEARING_IMPAIRED and AV_DISPOSITION_VISUAL_IMPAIRED.
 574
 575 2011-02-09 - 5592734 - lavc 52.112.0 - avcodec_thread_init()
 576   Deprecate avcodec_thread_init()/avcodec_thread_free() use; instead
 577   set thread_count before calling avcodec_open.
 578
 579 2011-02-09 - 778b08a - lavc 52.111.0 - threading API
 580   Add CODEC_CAP_FRAME_THREADS with new restrictions on get_buffer()/
 581   release_buffer()/draw_horiz_band() callbacks for appropriate codecs.
 582   Add thread_type and active_thread_type fields to AVCodecContext.
 583
 584 2011-02-08 - 3940caa - lavf 52.98.0 - av_probe_input_buffer
 585   Add av_probe_input_buffer() to avformat.h for probing format from a
 586   ByteIOContext.
 587
 588 2011-02-06 - fe174fc - lavf 52.97.0 - avio.h
 589   Add flag for non-blocking protocols: URL_FLAG_NONBLOCK
 590
 591 2011-02-04 - f124b08 - lavf 52.96.0 - avformat_free_context()
 592   Add avformat_free_context() in avformat.h.
 593
 594 2011-02-03 - f5b82f4 - lavc 52.109.0 - add CODEC_ID_PRORES
 595   Add CODEC_ID_PRORES to avcodec.h.
 596
 597 2011-02-03 - fe9a3fb - lavc 52.109.0 - H.264 profile defines
 598   Add defines for H.264 * Constrained Baseline and Intra profiles
 599
 600 2011-02-02 - lavf 52.95.0
 601   * 50196a9 - add a new installed header version.h.
 602   * 4efd5cf, dccbd97, 93b78d1 - add several variants of public
 603     avio_{put,get}_str* functions.  Deprecate corresponding semi-public
 604     {put,get}_str*.
 605
 606 2011-02-02 - dfd2a00 - lavu 50.37.0 - log.h
 607   Make av_dlog public.
 608
 609 2011-01-15 - a242ac3 - lavfi 1.74.0 - AVFilterBufferRefAudioProps
 610   Rename AVFilterBufferRefAudioProps.samples_nb to nb_samples.
 611
 612 2011-01-14 - 7f88a5b - lavf 52.93.0 - av_metadata_copy()
 613   Add av_metadata_copy() in avformat.h.
 614
 615 2011-01-07 - 81c623f - lavc 52.107.0 - deprecate reordered_opaque
 616   Deprecate reordered_opaque in favor of pkt_pts/dts.
 617
 618 2011-01-07 - 1919fea - lavc 52.106.0 - pkt_dts
 619   Add pkt_dts to AVFrame, this will in the future allow multithreading decoders
 620   to not mess up dts.
 621
 622 2011-01-07 - 393cbb9 - lavc 52.105.0 - pkt_pts
 623   Add pkt_pts to AVFrame.
 624
 625 2011-01-07 - 060ec0a - lavc 52.104.0 - av_get_profile_name()
 626   Add av_get_profile_name to libavcodec/avcodec.h.
 627
 628 2010-12-27 - 0ccabee - lavfi 1.71.0 - AV_PERM_NEG_LINESIZES
 629   Add AV_PERM_NEG_LINESIZES in avfilter.h.
 630
 631 2010-12-27 - 9128ae0 - lavf 52.91.0 - av_find_best_stream()
 632   Add av_find_best_stream to libavformat/avformat.h.
 633
 634 2010-12-27 - 107a7e3 - lavf 52.90.0
 635   Add AVFMT_NOSTREAMS flag for formats with no streams,
 636   like e.g. text metadata.
 637
 638 2010-12-22 - 0328b9e - lavu 50.36.0 - file.h
 639   Add functions av_file_map() and av_file_unmap() in file.h.
 640
 641 2010-12-19 - 0bc55f5 - lavu 50.35.0 - error.h
 642   Add "not found" error codes:
 643   AVERROR_DEMUXER_NOT_FOUND
 644   AVERROR_MUXER_NOT_FOUND
 645   AVERROR_DECODER_NOT_FOUND
 646   AVERROR_ENCODER_NOT_FOUND
 647   AVERROR_PROTOCOL_NOT_FOUND
 648   AVERROR_FILTER_NOT_FOUND
 649   AVERROR_BSF_NOT_FOUND
 650   AVERROR_STREAM_NOT_FOUND
 651
 652 2010-12-09 - c61cdd0 - lavcore 0.16.0 - avcore.h
 653   Move AV_NOPTS_VALUE, AV_TIME_BASE, AV_TIME_BASE_Q symbols from
 654   avcodec.h to avcore.h.
 655
 656 2010-12-04 - 16cfc96 - lavc 52.98.0 - CODEC_CAP_NEG_LINESIZES
 657   Add CODEC_CAP_NEG_LINESIZES codec capability flag in avcodec.h.
 658
 659 2010-12-04 - bb4afa1 - lavu 50.34.0 - av_get_pix_fmt_string()
 660   Deprecate avcodec_pix_fmt_string() in favor of
 661   pixdesc.h/av_get_pix_fmt_string().
 662
 663 2010-12-04 - 4da12e3 - lavcore 0.15.0 - av_image_alloc()
 664   Add av_image_alloc() to libavcore/imgutils.h.
 665
 666 2010-12-02 - 037be76 - lavfi 1.67.0 - avfilter_graph_create_filter()
 667   Add function avfilter_graph_create_filter() in avfiltergraph.h.
 668
 669 2010-11-25 - 4723bc2 - lavfi 1.65.0 - avfilter_get_video_buffer_ref_from_arrays()
 670   Add function avfilter_get_video_buffer_ref_from_arrays() in
 671   avfilter.h.
 672
 673 2010-11-21 - 176a615 - lavcore 0.14.0 - audioconvert.h
 674   Add a public audio channel API in audioconvert.h, and deprecate the
 675   corresponding functions in libavcodec:
 676   avcodec_get_channel_name()
 677   avcodec_get_channel_layout()
 678   avcodec_get_channel_layout_string()
 679   avcodec_channel_layout_num_channels()
 680   and the CH_* macros defined in libavcodec/avcodec.h.
 681
 682 2010-11-21 - 6bfc268 - lavf 52.85.0 - avformat.h
 683   Add av_append_packet().
 684
 685 2010-11-21 - a08d918 - lavc 52.97.0 - avcodec.h
 686   Add av_grow_packet().
 687
 688 2010-11-17 - 0985e1a - lavcore 0.13.0 - parseutils.h
 689   Add av_parse_color() declared in libavcore/parseutils.h.
 690
 691 2010-11-13 - cb2c971 - lavc 52.95.0 - AVCodecContext
 692   Add AVCodecContext.subtitle_header and AVCodecContext.subtitle_header_size
 693   fields.
 694
 695 2010-11-13 - 5aaea02 - lavfi 1.62.0 - avfiltergraph.h
 696   Make avfiltergraph.h public.
 697
 698 2010-11-13 - 4fcbb2a - lavfi 1.61.0 - avfiltergraph.h
 699   Remove declarations from avfiltergraph.h for the functions:
 700   avfilter_graph_check_validity()
 701   avfilter_graph_config_links()
 702   avfilter_graph_config_formats()
 703   which are now internal.
 704   Use avfilter_graph_config() instead.
 705
 706 2010-11-08 - d2af720 - lavu 50.33.0 - eval.h
 707   Deprecate functions:
 708   av_parse_and_eval_expr(),
 709   av_parse_expr(),
 710   av_eval_expr(),
 711   av_free_expr(),
 712   in favor of the functions:
 713   av_expr_parse_and_eval(),
 714   av_expr_parse(),
 715   av_expr_eval(),
 716   av_expr_free().
 717
 718 2010-11-08 - 24de0ed - lavfi 1.59.0 - avfilter_free()
 719   Rename avfilter_destroy() to avfilter_free().
 720   This change breaks libavfilter API/ABI.
 721
 722 2010-11-07 - 1e80a0e - lavfi 1.58.0 - avfiltergraph.h
 723   Remove graphparser.h header, move AVFilterInOut and
 724   avfilter_graph_parse() declarations to libavfilter/avfiltergraph.h.
 725
 726 2010-11-07 - 7313132 - lavfi 1.57.0 - AVFilterInOut
 727   Rename field AVFilterInOut.filter to AVFilterInOut.filter_ctx.
 728   This change breaks libavfilter API.
 729
 730 2010-11-04 - 97dd1e4 - lavfi 1.56.0 - avfilter_graph_free()
 731   Rename avfilter_graph_destroy() to avfilter_graph_free().
 732   This change breaks libavfilter API/ABI.
 733
 734 2010-11-04 - e15aeea - lavfi 1.55.0 - avfilter_graph_alloc()
 735   Add avfilter_graph_alloc() to libavfilter/avfiltergraph.h.
 736
 737 2010-11-02 - 6f84cd1 - lavcore 0.12.0 - av_get_bits_per_sample_fmt()
 738   Add av_get_bits_per_sample_fmt() to libavcore/samplefmt.h and
 739   deprecate av_get_bits_per_sample_format().
 740
 741 2010-11-02 - d63e456 - lavcore 0.11.0 - samplefmt.h
 742   Add sample format functions in libavcore/samplefmt.h:
 743   av_get_sample_fmt_name(),
 744   av_get_sample_fmt(),
 745   av_get_sample_fmt_string(),
 746   and deprecate the corresponding libavcodec/audioconvert.h functions:
 747   avcodec_get_sample_fmt_name(),
 748   avcodec_get_sample_fmt(),
 749   avcodec_sample_fmt_string().
 750
 751 2010-11-02 - 262d1c5 - lavcore 0.10.0 - samplefmt.h
 752   Define enum AVSampleFormat in libavcore/samplefmt.h, deprecate enum
 753   SampleFormat.
 754
 755 2010-10-16 - 2a24df9 - lavfi 1.52.0 - avfilter_graph_config()
 756   Add the function avfilter_graph_config() in avfiltergraph.h.
 757
 758 2010-10-15 - 03700d3 - lavf 52.83.0 - metadata API
 759   Change demuxers to export metadata in generic format and
 760   muxers to accept generic format. Deprecate the public
 761   conversion API.
 762
 763 2010-10-10 - 867ae7a - lavfi 1.49.0 - AVFilterLink.time_base
 764   Add time_base field to AVFilterLink.
 765
 766 2010-09-27 - c85eef4 - lavu 50.31.0 - av_set_options_string()
 767   Move av_set_options_string() from libavfilter/parseutils.h to
 768   libavutil/opt.h.
 769
 770 2010-09-27 - acc0490 - lavfi 1.47.0 - AVFilterLink
 771   Make the AVFilterLink fields srcpad and dstpad store the pointers to
 772   the source and destination pads, rather than their indexes.
 773
 774 2010-09-27 - 372e288 - lavu 50.30.0 - av_get_token()
 775   Move av_get_token() from libavfilter/parseutils.h to
 776   libavutil/avstring.h.
 777
 778 2010-09-26 - 635d4ae - lsws 0.12.0 - swscale.h
 779   Add the functions sws_alloc_context() and sws_init_context().
 780
 781 2010-09-26 - 6ed0404 - lavu 50.29.0 - opt.h
 782   Move libavcodec/opt.h to libavutil/opt.h.
 783
 784 2010-09-24 - 1c1c80f - lavu 50.28.0 - av_log_set_flags()
 785   Default of av_log() changed due to many problems to the old no repeat
 786   detection. Read the docs of AV_LOG_SKIP_REPEATED in log.h before
 787   enabling it for your app!.
 788
 789 2010-09-24 - f66eb58 - lavc 52.90.0 - av_opt_show2()
 790   Deprecate av_opt_show() in favor or av_opt_show2().
 791
 792 2010-09-14 - bc6f0af - lavu 50.27.0 - av_popcount()
 793   Add av_popcount() to libavutil/common.h.
 794
 795 2010-09-08 - c6c98d0 - lavu 50.26.0 - av_get_cpu_flags()
 796   Add av_get_cpu_flags().
 797
 798 2010-09-07 - 34017fd - lavcore 0.9.0 - av_image_copy()
 799   Add av_image_copy().
 800
 801 2010-09-07 - 9686abb - lavcore 0.8.0 - av_image_copy_plane()
 802   Add av_image_copy_plane().
 803
 804 2010-09-07 - 9b7269e - lavcore 0.7.0 - imgutils.h
 805   Adopt hierarchical scheme for the imgutils.h function names,
 806   deprecate the old names.
 807
 808 2010-09-04 - 7160bb7 - lavu 50.25.0 - AV_CPU_FLAG_*
 809   Deprecate the FF_MM_* flags defined in libavcodec/avcodec.h in favor
 810   of the AV_CPU_FLAG_* flags defined in libavutil/cpu.h.
 811
 812 2010-08-26 - 5da19b5 - lavc 52.87.0 - avcodec_get_channel_layout()
 813   Add avcodec_get_channel_layout() in audioconvert.h.
 814
 815 2010-08-20 - e344336 - lavcore 0.6.0 - av_fill_image_max_pixsteps()
 816   Rename av_fill_image_max_pixstep() to av_fill_image_max_pixsteps().
 817
 818 2010-08-18 - a6ddf8b - lavcore 0.5.0 - av_fill_image_max_pixstep()
 819   Add av_fill_image_max_pixstep() in imgutils.h.
 820
 821 2010-08-17 - 4f2d2e4 - lavu 50.24.0 - AV_NE()
 822   Add the AV_NE macro.
 823
 824 2010-08-17 - ad2c950 - lavfi 1.36.0 - audio framework
 825   Implement AVFilterBufferRefAudioProps struct for audio properties,
 826   get_audio_buffer(), filter_samples() functions and related changes.
 827
 828 2010-08-12 - 81c1eca - lavcore 0.4.0 - av_get_image_linesize()
 829   Add av_get_image_linesize() in imgutils.h.
 830
 831 2010-08-11 - c1db7bf - lavfi 1.34.0 - AVFilterBufferRef
 832   Resize data and linesize arrays in AVFilterBufferRef to 8.
 833
 834   This change breaks libavfilter API/ABI.
 835
 836 2010-08-11 - 9f08d80 - lavc 52.85.0 - av_picture_data_copy()
 837   Add av_picture_data_copy in avcodec.h.
 838
 839 2010-08-11 - 84c0386 - lavfi 1.33.0 - avfilter_open()
 840   Change avfilter_open() signature:
 841   AVFilterContext *avfilter_open(AVFilter *filter, const char *inst_name) ->
 842   int avfilter_open(AVFilterContext **filter_ctx, AVFilter *filter, const char *inst_name);
 843
 844   This change breaks libavfilter API/ABI.
 845
 846 2010-08-11 - cc80caf - lavfi 1.32.0 - AVFilterBufferRef
 847   Add a type field to AVFilterBufferRef, and move video specific
 848   properties to AVFilterBufferRefVideoProps.
 849
 850   This change breaks libavfilter API/ABI.
 851
 852 2010-08-07 - 5d4890d - lavfi 1.31.0 - AVFilterLink
 853   Rename AVFilterLink fields:
 854   AVFilterLink.srcpic    ->  AVFilterLink.src_buf
 855   AVFilterLink.cur_pic   ->  AVFilterLink.cur_buf
 856   AVFilterLink.outpic    ->  AVFilterLink.out_buf
 857
 858 2010-08-07 - 7fce481 - lavfi 1.30.0
 859   Rename functions and fields:
 860   avfilter_(un)ref_pic       -> avfilter_(un)ref_buffer
 861   avfilter_copy_picref_props -> avfilter_copy_buffer_ref_props
 862   AVFilterBufferRef.pic      -> AVFilterBufferRef.buffer
 863
 864 2010-08-07 - ecc8dad - lavfi 1.29.0 - AVFilterBufferRef
 865   Rename AVFilterPicRef to AVFilterBufferRef.
 866
 867 2010-08-07 - d54e094 - lavfi 1.28.0 - AVFilterBuffer
 868   Move format field from AVFilterBuffer to AVFilterPicRef.
 869
 870 2010-08-06 - bf176f5 - lavcore 0.3.0 - av_check_image_size()
 871   Deprecate avcodec_check_dimensions() in favor of the function
 872   av_check_image_size() defined in libavcore/imgutils.h.
 873
 874 2010-07-30 - 56b5e9d - lavfi 1.27.0 - AVFilterBuffer
 875   Increase size of the arrays AVFilterBuffer.data and
 876   AVFilterBuffer.linesize from 4 to 8.
 877
 878   This change breaks libavfilter ABI.
 879
 880 2010-07-29 - e7bd48a - lavcore 0.2.0 - imgutils.h
 881   Add functions av_fill_image_linesizes() and
 882   av_fill_image_pointers(), declared in libavcore/imgutils.h.
 883
 884 2010-07-27 - 126b638 - lavcore 0.1.0 - parseutils.h
 885   Deprecate av_parse_video_frame_size() and av_parse_video_frame_rate()
 886   defined in libavcodec in favor of the newly added functions
 887   av_parse_video_size() and av_parse_video_rate() declared in
 888   libavcore/parseutils.h.
 889
 890 2010-07-23 - 4485247 - lavu 50.23.0 - mathematics.h
 891   Add the M_PHI constant definition.
 892
 893 2010-07-22 - bdab614 - lavfi 1.26.0 - media format generalization
 894   Add a type field to AVFilterLink.
 895
 896   Change the field types:
 897   enum PixelFormat format   -> int format   in AVFilterBuffer
 898   enum PixelFormat *formats -> int *formats in AVFilterFormats
 899   enum PixelFormat *format  -> int format   in AVFilterLink
 900
 901   Change the function signatures:
 902   AVFilterFormats *avfilter_make_format_list(const enum PixelFormat *pix_fmts); ->
 903   AVFilterFormats *avfilter_make_format_list(const int *fmts);
 904
 905   int avfilter_add_colorspace(AVFilterFormats **avff, enum PixelFormat pix_fmt); ->
 906   int avfilter_add_format    (AVFilterFormats **avff, int fmt);
 907
 908   AVFilterFormats *avfilter_all_colorspaces(void); ->
 909   AVFilterFormats *avfilter_all_formats    (enum AVMediaType type);
 910
 911   This change breaks libavfilter API/ABI.
 912
 913 2010-07-21 - aac6ca6 - lavcore 0.0.0
 914   Add libavcore.
 915
 916 2010-07-17 - b5c582f - lavfi 1.25.0 - AVFilterBuffer
 917   Remove w and h fields from AVFilterBuffer.
 918
 919 2010-07-17 - f0d77b2 - lavfi 1.24.0 - AVFilterBuffer
 920   Rename AVFilterPic to AVFilterBuffer.
 921
 922 2010-07-17 - 57fe80f - lavf 52.74.0 - url_fskip()
 923   Make url_fskip() return an int error code instead of void.
 924
 925 2010-07-11 - 23940f1 - lavc 52.83.0
 926   Add AVCodecContext.lpc_type and AVCodecContext.lpc_passes fields.
 927   Add AVLPCType enum.
 928   Deprecate AVCodecContext.use_lpc.
 929
 930 2010-07-11 - e1d7c88 - lavc 52.82.0 - avsubtitle_free()
 931   Add a function for free the contents of a AVSubtitle generated by
 932   avcodec_decode_subtitle.
 933
 934 2010-07-11 - b91d08f - lavu 50.22.0 - bswap.h and intreadwrite.h
 935   Make the bswap.h and intreadwrite.h API public.
 936
 937 2010-07-08 - ce1cd1c - lavu 50.21.0 - pixdesc.h
 938   Rename read/write_line() to av_read/write_image_line().
 939
 940 2010-07-07 - 4d508e4 - lavfi 1.21.0 - avfilter_copy_picref_props()
 941   Add avfilter_copy_picref_props().
 942
 943 2010-07-03 - 2d525ef - lavc 52.79.0
 944   Add FF_COMPLIANCE_UNOFFICIAL and change all instances of
 945   FF_COMPLIANCE_INOFFICIAL to use FF_COMPLIANCE_UNOFFICIAL.
 946
 947 2010-07-02 - 89eec74 - lavu 50.20.0 - lfg.h
 948   Export av_lfg_init(), av_lfg_get(), av_mlfg_get(), and av_bmg_get() through
 949   lfg.h.
 950
 951 2010-06-28 - a52e2c3 - lavfi 1.20.1 - av_parse_color()
 952   Extend av_parse_color() syntax, make it accept an alpha value specifier and
 953   set the alpha value to 255 by default.
 954
 955 2010-06-22 - 735cf6b - lavf 52.71.0 - URLProtocol.priv_data_size, priv_data_class
 956   Add priv_data_size and priv_data_class to URLProtocol.
 957
 958 2010-06-22 - ffbb289 - lavf 52.70.0 - url_alloc(), url_connect()
 959   Add url_alloc() and url_connect().
 960
 961 2010-06-22 - 9b07a2d - lavf 52.69.0 - av_register_protocol2()
 962   Add av_register_protocol2(), deprecating av_register_protocol().
 963
 964 2010-06-09 - 65db058 - lavu 50.19.0 - av_compare_mod()
 965   Add av_compare_mod() to libavutil/mathematics.h.
 966
 967 2010-06-05 - 0b99215 - lavu 50.18.0 - eval API
 968   Make the eval API public.
 969
 970 2010-06-04 - 31878fc - lavu 50.17.0 - AV_BASE64_SIZE
 971   Add AV_BASE64_SIZE() macro.
 972
 973 2010-06-02 - 7e566bb - lavc 52.73.0 - av_get_codec_tag_string()
 974   Add av_get_codec_tag_string().
 975
 976 2010-06-01 - 2b99142 - lsws 0.11.0 - convertPalette API
 977   Add sws_convertPalette8ToPacked32() and sws_convertPalette8ToPacked24().
 978
 979 2010-05-26 - 93ebfee - lavc 52.72.0 - CODEC_CAP_EXPERIMENTAL
 980   Add CODEC_CAP_EXPERIMENTAL flag.
 981   NOTE: this was backported to 0.6
 982
 983 2010-05-23 - 9977863 - lavu 50.16.0 - av_get_random_seed()
 984   Add av_get_random_seed().
 985
 986 2010-05-18 - 796ac23 - lavf 52.63.0 - AVFMT_FLAG_RTP_HINT
 987   Add AVFMT_FLAG_RTP_HINT as possible value for AVFormatContext.flags.
 988   NOTE: this was backported to 0.6
 989
 990 2010-05-09 - b6bc205 - lavfi 1.20.0 - AVFilterPicRef
 991   Add interlaced and top_field_first fields to AVFilterPicRef.
 992
 993 ------------------------------8<-------------------------------------
 994                    0.6 branch was cut here
 995 ----------------------------->8--------------------------------------
 996
 997 2010-05-01 - 8e2ee18 - lavf 52.62.0 - probe function
 998   Add av_probe_input_format2 to API, it allows ignoring probe
 999   results below given score and returns the actual probe score.
1000
1001 2010-04-01 - 3dd6180 - lavf 52.61.0 - metadata API
1002   Add a flag for av_metadata_set2() to disable overwriting of
1003   existing tags.
1004
1005 2010-04-01 - 0fb49b5 - lavc 52.66.0
1006   Add avcodec_get_edge_width().
1007
1008 2010-03-31 - d103218 - lavc 52.65.0
1009   Add avcodec_copy_context().
1010
1011 2010-03-31 - 1a70d12 - lavf 52.60.0 - av_match_ext()
1012   Make av_match_ext() public.
1013
1014 2010-03-31 - 1149150 - lavu 50.14.0 - AVMediaType
1015   Move AVMediaType enum from libavcodec to libavutil.
1016
1017 2010-03-31 - 72415b2 - lavc 52.64.0 - AVMediaType
1018   Define AVMediaType enum, and use it instead of enum CodecType, which
1019   is deprecated and will be dropped at the next major bump.
1020
1021 2010-03-25 - 8795823 - lavu 50.13.0 - av_strerror()
1022   Implement av_strerror().
1023
1024 2010-03-23 - e1484eb - lavc 52.60.0 - av_dct_init()
1025   Support DCT-I and DST-I.
1026
1027 2010-03-15 - b8819c8 - lavf 52.56.0 - AVFormatContext.start_time_realtime
1028   Add AVFormatContext.start_time_realtime field.
1029
1030 2010-03-13 - 5bb5c1d - lavfi 1.18.0 - AVFilterPicRef.pos
1031   Add AVFilterPicRef.pos field.
1032
1033 2010-03-13 - 60c144f - lavu 50.12.0 - error.h
1034   Move error code definitions from libavcodec/avcodec.h to
1035   the new public header libavutil/error.h.
1036
1037 2010-03-07 - c709483 - lavc 52.56.0 - avfft.h
1038   Add public FFT interface.
1039
1040 2010-03-06 - ac6ef86 - lavu 50.11.0 - av_stristr()
1041   Add av_stristr().
1042
1043 2010-03-03 - 4b83fc0 - lavu 50.10.0 - av_tree_enumerate()
1044   Add av_tree_enumerate().
1045
1046 2010-02-07 - b687c1a - lavu 50.9.0 - av_compare_ts()
1047   Add av_compare_ts().
1048
1049 2010-02-05 - 3f3dc76 - lsws 0.10.0 - sws_getCoefficients()
1050   Add sws_getCoefficients().
1051
1052 2010-02-01 - ca76a11 - lavf 52.50.0 - metadata API
1053   Add a list of generic tag names, change 'author' -> 'artist',
1054   'year' -> 'date'.
1055
1056 2010-01-30 - 80a07f6 - lavu 50.8.0 - av_get_pix_fmt()
1057   Add av_get_pix_fmt().
1058
1059 2010-01-21 - 01cc47d - lsws 0.9.0 - sws_scale()
1060   Change constness attributes of sws_scale() parameters.
1061
1062 2010-01-10 - 3fb8e77 - lavfi 1.15.0 - avfilter_graph_config_links()
1063   Add a log_ctx parameter to avfilter_graph_config_links().
1064
1065 2010-01-07 - 8e9767f - lsws 0.8.0 - sws_isSupported{In,Out}put()
1066   Add sws_isSupportedInput() and sws_isSupportedOutput() functions.
1067
1068 2010-01-06 - c1d662f - lavfi 1.14.0 - avfilter_add_colorspace()
1069   Change the avfilter_add_colorspace() signature, make it accept an
1070   (AVFilterFormats **) rather than an (AVFilterFormats *) as before.
1071
1072 2010-01-03 - 4fd1f18 - lavfi 1.13.0 - avfilter_add_colorspace()
1073   Add avfilter_add_colorspace().
1074
1075 2010-01-02 - 8eb631f - lavf 52.46.0 - av_match_ext()
1076   Add av_match_ext(), it should be used in place of match_ext().
1077
1078 2010-01-01 - a1f547b - lavf 52.45.0 - av_guess_format()
1079   Add av_guess_format(), it should be used in place of guess_format().
1080
1081 2009-12-13 - a181981 - lavf 52.43.0 - metadata API
1082   Add av_metadata_set2(), AV_METADATA_DONT_STRDUP_KEY and
1083   AV_METADATA_DONT_STRDUP_VAL.
1084
1085 2009-12-13 - 277c733 - lavu 50.7.0 - avstring.h API
1086   Add av_d2str().
1087
1088 2009-12-13 - 02b398e - lavc 52.42.0 - AVStream
1089   Add avg_frame_rate.
1090
1091 2009-12-12 - 3ba69a1 - lavu 50.6.0 - av_bmg_next()
1092   Introduce the av_bmg_next() function.
1093
1094 2009-12-05 - a13a543 - lavfi 1.12.0 - avfilter_draw_slice()
1095   Add a slice_dir parameter to avfilter_draw_slice().
1096
1097 2009-11-26 - 4cc3f6a - lavfi 1.11.0 - AVFilter
1098   Remove the next field from AVFilter, this is not anymore required.
1099
1100 2009-11-25 - 1433c4a - lavfi 1.10.0 - avfilter_next()
1101   Introduce the avfilter_next() function.
1102
1103 2009-11-25 - 86a60fa - lavfi 1.9.0 - avfilter_register()
1104   Change the signature of avfilter_register() to make it return an
1105   int. This is required since now the registration operation may fail.
1106
1107 2009-11-25 - 74a0059 - lavu 50.5.0 - pixdesc.h API
1108   Make the pixdesc.h API public.
1109
1110 2009-10-27 - 243110f - lavfi 1.5.0 - AVFilter.next
1111   Add a next field to AVFilter, this is used for simplifying the
1112   registration and management of the registered filters.
1113
1114 2009-10-23 - cccd292 - lavfi 1.4.1 - AVFilter.description
1115   Add a description field to AVFilter.
1116
1117 2009-10-19 - 6b5dc05 - lavfi 1.3.0 - avfilter_make_format_list()
1118   Change the interface of avfilter_make_format_list() from
1119   avfilter_make_format_list(int n, ...) to
1120   avfilter_make_format_list(enum PixelFormat *pix_fmts).
1121
1122 2009-10-18 - 0eb4ff9 - lavfi 1.0.0 - avfilter_get_video_buffer()
1123   Make avfilter_get_video_buffer() recursive and add the w and h
1124   parameters to it.
1125
1126 2009-10-07 - 46c40e4 - lavfi 0.5.1 - AVFilterPic
1127   Add w and h fields to AVFilterPic.
1128
1129 2009-06-22 - 92400be - lavf 52.34.1 - AVFormatContext.packet_size
1130   This is now an unsigned int instead of a signed int.
1131
1132 2009-06-19 - a4276ba - lavc 52.32.0 - AVSubtitle.pts
1133   Add a pts field to AVSubtitle which gives the subtitle packet pts
1134   in AV_TIME_BASE. Some subtitle de-/encoders (e.g. XSUB) will
1135   not work right without this.
1136
1137 2009-06-03 - 8f3f2e0 - lavc 52.30.2 - AV_PKT_FLAG_KEY
1138   PKT_FLAG_KEY has been deprecated and will be dropped at the next
1139   major version. Use AV_PKT_FLAG_KEY instead.
1140
1141 2009-06-01 - f988ce6 - lavc 52.30.0 - av_lockmgr_register()
1142   av_lockmgr_register() can be used to register a callback function
1143   that lavc (and in the future, libraries that depend on lavc) can use
1144   to implement mutexes. The application should provide a callback function
1145   that implements the AV_LOCK_* operations described in avcodec.h.
1146   When the lock manager is registered, FFmpeg is guaranteed to behave
1147   correctly in a multi-threaded application.
1148
1149 2009-04-30 - ce1d9c8 - lavc 52.28.0 - av_free_packet()
1150   av_free_packet() is no longer an inline function. It is now exported.
1151
1152 2009-04-11 - 80d403f - lavc 52.25.0 - deprecate av_destruct_packet_nofree()
1153   Please use NULL instead. This has been supported since r16506
1154   (lavf > 52.23.1, lavc > 52.10.0).
1155
1156 2009-04-07 - 7a00bba - lavc 52.23.0 - avcodec_decode_video/audio/subtitle
1157   The old decoding functions are deprecated, all new code should use the
1158   new functions avcodec_decode_video2(), avcodec_decode_audio3() and
1159   avcodec_decode_subtitle2(). These new functions take an AVPacket *pkt
1160   argument instead of a const uint8_t *buf / int buf_size pair.
1161
1162 2009-04-03 - 7b09db3 - lavu 50.3.0 - av_fifo_space()
1163   Introduce the av_fifo_space() function.
1164
1165 2009-04-02 - fabd246 - lavc 52.23.0 - AVPacket
1166   Move AVPacket declaration from libavformat/avformat.h to
1167   libavcodec/avcodec.h.
1168
1169 2009-03-22 - 6e08ca9 - lavu 50.2.0 - RGB32 pixel formats
1170   Convert the pixel formats PIX_FMT_ARGB, PIX_FMT_RGBA, PIX_FMT_ABGR,
1171   PIX_FMT_BGRA, which were defined as macros, into enum PixelFormat values.
1172   Conversely PIX_FMT_RGB32, PIX_FMT_RGB32_1, PIX_FMT_BGR32 and
1173   PIX_FMT_BGR32_1 are now macros.
1174   avcodec_get_pix_fmt() now recognizes the "rgb32" and "bgr32" aliases.
1175   Re-sort the enum PixelFormat list accordingly.
1176   This change breaks API/ABI backward compatibility.
1177
1178 2009-03-22 - f82674e - lavu 50.1.0 - PIX_FMT_RGB5X5 endian variants
1179   Add the enum PixelFormat values:
1180   PIX_FMT_RGB565BE, PIX_FMT_RGB565LE, PIX_FMT_RGB555BE, PIX_FMT_RGB555LE,
1181   PIX_FMT_BGR565BE, PIX_FMT_BGR565LE, PIX_FMT_BGR555BE, PIX_FMT_BGR555LE.
1182
1183 2009-03-21 - ee6624e - lavu 50.0.0  - av_random*
1184   The Mersenne Twister PRNG implemented through the av_random* functions
1185   was removed. Use the lagged Fibonacci PRNG through the av_lfg* functions
1186   instead.
1187
1188 2009-03-08 - 41dd680 - lavu 50.0.0  - AVFifoBuffer
1189   av_fifo_init, av_fifo_read, av_fifo_write and av_fifo_realloc were dropped
1190   and replaced by av_fifo_alloc, av_fifo_generic_read, av_fifo_generic_write
1191   and av_fifo_realloc2.
1192   In addition, the order of the function arguments of av_fifo_generic_read
1193   was changed to match av_fifo_generic_write.
1194   The AVFifoBuffer/struct AVFifoBuffer may only be used in an opaque way by
1195   applications, they may not use sizeof() or directly access members.
1196
1197 2009-03-01 - ec26457 - lavf 52.31.0 - Generic metadata API
1198   Introduce a new metadata API (see av_metadata_get() and friends).
1199   The old API is now deprecated and should not be used anymore. This especially
1200   includes the following structure fields:
1201     - AVFormatContext.title
1202     - AVFormatContext.author
1203     - AVFormatContext.copyright
1204     - AVFormatContext.comment
1205     - AVFormatContext.album
1206     - AVFormatContext.year
1207     - AVFormatContext.track
1208     - AVFormatContext.genre
1209     - AVStream.language
1210     - AVStream.filename
1211     - AVProgram.provider_name
1212     - AVProgram.name
1213     - AVChapter.title