1 Never assume the API of libav* to be stable unless at least 1 month has passed
2 since the last major version increase.
4 The last version increases were:
6 libavdevice: 2011-04-18
7 libavfilter: 2011-04-18
8 libavformat: 2012-01-27
13 API changes, most recent first:
15 2012-xx-xx - xxxxxxx - lavfi 2.16.0 - avfiltergraph.h
16 Add avfilter_graph_parse2(), avfilter_inout_alloc() and
17 avfilter_inout_free() functions.
19 2012-xx-xx - xxxxxxx - lavu 51.27.0 - samplefmt.h
20 Add av_get_packed_sample_fmt() and av_get_planar_sample_fmt()
22 2012-xx-xx - xxxxxxx - lavu 51.26.0 - audioconvert.h
23 Add av_get_default_channel_layout()
25 2012-03-06 - 4d851f8 - lavu 51.25.0 - cpu.h
26 Add av_set_cpu_flags_mask().
28 2012-03-05 - lavc 54.8.0
29 6699d07 Add av_get_exact_bits_per_sample()
30 9524cf7 Add av_get_audio_frame_duration()
32 2012-03-04 - 44fe77b - lavc 54.7.0 - avcodec.h
33 Add av_codec_is_encoder/decoder().
35 2012-03-01 - 442c132 - lavc 54.3.0 - avcodec.h
36 Add av_packet_shrink_side_data.
38 2012-02-29 - dd2a4bc - lavf 54.2.0 - avformat.h
39 Add AVStream.attached_pic and AV_DISPOSITION_ATTACHED_PIC,
40 used for dealing with attached pictures/cover art.
42 2012-02-25 - c9bca80 - lavu 51.24.0 - error.h
44 NOTE: this was backported to 0.8
46 2012-02-20 - e9cda85 - lavc 54.2.0
47 Add duration field to AVCodecParserContext
49 2012-02-20 - 0b42a93 - lavu 51.23.1 - mathematics.h
50 Add av_rescale_q_rnd()
52 2012-02-08 - 38d5533 - lavu 51.22.1 - pixdesc.h
53 Add PIX_FMT_PSEUDOPAL flag.
55 2012-02-08 - 52f82a1 - lavc 54.01.0
56 Add avcodec_encode_video2() and deprecate avcodec_encode_video().
58 2012-02-01 - 316fc74 - lavc 54.01.0
59 Add av_fast_padded_malloc() as alternative for av_realloc() when aligned
60 memory is required. The buffer will always have FF_INPUT_BUFFER_PADDING_SIZE
61 zero-padded bytes at the end.
63 2012-01-31 - dd6d3b0 - lavf 54.01.0
64 Add avformat_get_riff_video_tags() and avformat_get_riff_audio_tags().
65 NOTE: this was backported to 0.8
67 2012-01-31 - af08d9a - lavc 54.01.0
68 Add avcodec_is_open() function.
69 NOTE: this was backported to 0.8
71 2012-01-30 - 8b93312 - lavu 51.22.0 - intfloat.h
72 Add a new installed header libavutil/intfloat.h with int/float punning
74 NOTE: this was backported to 0.8
76 2012-01-25 - lavf 53.22.0
77 f1caf01 Allow doing av_write_frame(ctx, NULL) for flushing possible
78 buffered data within a muxer. Added AVFMT_ALLOW_FLUSH for
79 muxers supporting it (av_write_frame makes sure it is called
80 only for muxers with this flag).
82 ------------------------------8<-------------------------------------
83 0.8 branch was cut here
84 ----------------------------->8--------------------------------------
86 2012-01-15 - lavc 53.34.0
87 New audio encoding API:
88 b2c75b6 Add CODEC_CAP_VARIABLE_FRAME_SIZE capability for use by audio
90 5ee5fa0 Add avcodec_fill_audio_frame() as a convenience function.
91 b2c75b6 Add avcodec_encode_audio2() and deprecate avcodec_encode_audio().
92 Add AVCodec.encode2().
94 2012-01-12 - 3167dc9 - lavfi 2.15.0
95 Add a new installed header -- libavfilter/version.h -- with version macros.
97 2011-01-03 - b73ec05 - lavu 51.21.0
100 2011-12-25 - lavfi 2.14.0
101 e1d9dbf Add a new installed header - buffersrc.h
102 It contains a new function av_buffersrc_buffer() that allows passing
103 frames to the 'buffer' filter, but unlike av_vsrc_buffer_add_frame()
104 it allows for direct rendering.
105 1c9e340 Add avfilter_copy_frame_props() for copying properties from
106 AVFrame to AVFilterBufferRef.
108 2011-12-25 - lavc 53.31.0
109 Add the following new fields to AVFrame:
110 b58dbb5 sample_aspect_ratio
111 3a2ddf7 width, height
114 2011-12-18 - 8400b12 - lavc 53.28.1
115 Deprecate AVFrame.age. The field is unused.
117 2011-12-12 - 5266045 - lavf 53.17.0
118 Add avformat_close_input().
119 Deprecate av_close_input_file() and av_close_input_stream().
121 2011-12-02 - 0eea212 - lavc 53.25.0
122 Add nb_samples and extended_data fields to AVFrame.
123 Deprecate AVCODEC_MAX_AUDIO_FRAME_SIZE.
124 Deprecate avcodec_decode_audio3() in favor of avcodec_decode_audio4().
125 avcodec_decode_audio4() writes output samples to an AVFrame, which allows
126 audio decoders to use get_buffer().
128 2011-12-04 - 560f773 - lavc 53.24.0
129 Change AVFrame.data[4]/base[4]/linesize[4]/error[4] to [8] at next major bump.
130 Change AVPicture.data[4]/linesize[4] to [8] at next major bump.
131 Change AVCodecContext.error[4] to [8] at next major bump.
132 Add AV_NUM_DATA_POINTERS to simplify the bump transition.
134 2011-11-23 - bbb46f3 - lavu 51.18.0
135 Add av_samples_get_buffer_size(), av_samples_fill_arrays(), and
136 av_samples_alloc(), to samplefmt.h.
138 2011-11-23 - 8889cc4 - lavu 51.17.0
139 Add planar sample formats and av_sample_fmt_is_planar() to samplefmt.h.
141 2011-11-19 - f3a29b7 - lavc 53.21.0
142 Move some AVCodecContext fields to a new private struct, AVCodecInternal,
143 which is accessed from a new field, AVCodecContext.internal.
145 AVCodecContext.internal_buffer --> AVCodecInternal.buffer
146 AVCodecContext.internal_buffer_count --> AVCodecInternal.buffer_count
147 AVCodecContext.is_copy --> AVCodecInternal.is_copy
149 2011-11-16 - 6270671 - lavu 51.16.0
152 2011-11-13 - lavf 53.15.0
153 New interrupt callback API, allowing per-AVFormatContext/AVIOContext
155 6aa0b98 Add AVIOInterruptCB struct and the interrupt_callback field to
157 1dee0ac Add avio_open2() with additional parameters. Those are
158 an interrupt callback and an options AVDictionary.
159 This will allow passing AVOptions to protocols after lavf
162 2011-11-06 - ba04ecf - lavu 51.14.0
163 Add av_strcasecmp() and av_strncasecmp() to avstring.h.
165 2011-11-06 - 07b172f - lavu 51.13.0
166 Add av_toupper()/av_tolower()
168 2011-11-05 - b6d08f4 - lavf 53.13.0
169 Add avformat_network_init()/avformat_network_deinit()
171 2011-10-27 - 512557b - lavc 53.15.0
172 Remove avcodec_parse_frame.
173 Deprecate AVCodecContext.parse_only and CODEC_CAP_PARSE_ONLY.
175 2011-10-19 - 569129a - lavf 53.10.0
176 Add avformat_new_stream(). Deprecate av_new_stream().
178 2011-10-13 - b631fba - lavf 53.9.0
179 Add AVFMT_NO_BYTE_SEEK AVInputFormat flag.
181 2011-10-12 - lavu 51.12.0
182 AVOptions API rewrite.
184 - 145f741 FF_OPT_TYPE* renamed to AV_OPT_TYPE_*
185 - new setting/getting functions with slightly different semantics:
186 dac66da av_set_string3 -> av_opt_set
187 av_set_double -> av_opt_set_double
188 av_set_q -> av_opt_set_q
189 av_set_int -> av_opt_set_int
191 41d9d51 av_get_string -> av_opt_get
192 av_get_double -> av_opt_get_double
193 av_get_q -> av_opt_get_q
194 av_get_int -> av_opt_get_int
196 - 8c5dcaa trivial rename av_next_option -> av_opt_next
197 - 641c7af new functions - av_opt_child_next, av_opt_child_class_next
200 2011-09-03 - fb4ca26 - lavc 53.10.0
203 Add {avcodec,avformat,sws}_get_class().
205 2011-09-03 - c11fb82 - lavu 51.10.0
206 Add AV_OPT_SEARCH_FAKE_OBJ flag for av_opt_find() function.
208 2011-08-26 - lavu 51.9.0
209 - f2011ed Add av_fifo_peek2(), deprecate av_fifo_peek().
210 - add41de..abc78a5 Do not include intfloat_readwrite.h,
211 mathematics.h, rational.h, pixfmt.h, or log.h from avutil.h.
213 2011-08-16 - 48f9e45 - lavf 53.4.0
214 Add avformat_query_codec().
216 2011-08-16 - bca06e7 - lavc 53.8.0
217 Add avcodec_get_type().
219 2011-08-06 - 2f63440 - lavf 53.4.0
220 Add error_recognition to AVFormatContext.
222 2011-08-02 - 9d39cbf - lavc 53.7.1
223 Add AV_PKT_FLAG_CORRUPT AVPacket flag.
225 2011-07-10 - a67c061 - lavf 53.3.0
226 Add avformat_find_stream_info(), deprecate av_find_stream_info().
227 NOTE: this was backported to 0.7
229 2011-07-10 - 0b950fe - lavc 53.6.0
230 Add avcodec_open2(), deprecate avcodec_open().
231 NOTE: this was backported to 0.7
233 Add avcodec_alloc_context3. Deprecate avcodec_alloc_context() and
234 avcodec_alloc_context2().
236 2011-06-23 - 67e9ae1 - lavu 51.8.0 - attributes.h
237 Add av_printf_format().
239 ------------------------------8<-------------------------------------
240 0.7 branch was cut here
241 ----------------------------->8--------------------------------------
243 2011-06-16 - 05e84c9, 25de595 - lavf 53.2.0 - avformat.h
244 Add avformat_open_input and avformat_write_header().
245 Deprecate av_open_input_stream, av_open_input_file,
246 AVFormatParameters and av_write_header.
248 2011-06-16 - 7e83e1c, dc59ec5 - lavu 51.7.0 - opt.h
249 Add av_opt_set_dict() and av_opt_find().
250 Deprecate av_find_opt().
251 Add AV_DICT_APPEND flag.
253 2011-06-10 - cb7c11c - lavu 51.6.0 - opt.h
254 Add av_opt_flag_is_set().
256 2011-06-08 - d9f80ea - lavu 51.5.0 - AVMetadata
257 Move AVMetadata from lavf to lavu and rename it to
258 AVDictionary -- new installed header dict.h.
259 All av_metadata_* functions renamed to av_dict_*.
261 2011-06-07 - a6703fa - lavu 51.4.0 - av_get_bytes_per_sample()
262 Add av_get_bytes_per_sample() in libavutil/samplefmt.h.
263 Deprecate av_get_bits_per_sample_fmt().
265 2011-06-05 - b39b062 - lavu 51.3.0 - opt.h
266 Add av_opt_free convenience function.
268 2011-05-28 - 0420bd7 - lavu 51.2.0 - pixdesc.h
269 Add av_get_pix_fmt_name() in libavutil/pixdesc.h, and deprecate
270 avcodec_get_pix_fmt_name() in libavcodec/avcodec.h in its favor.
272 2011-05-25 - 30315a8 - lavf 53.1.0 - avformat.h
273 Add fps_probe_size to AVFormatContext.
275 2011-05-18 - 64150ff - lavc 53.4.0 - AVCodecContext.request_sample_fmt
276 Add request_sample_fmt field to AVCodecContext.
278 2011-05-10 - 188dea1 - lavc 53.3.0 - avcodec.h
279 Deprecate AVLPCType and the following fields in
280 AVCodecContext: lpc_coeff_precision, prediction_order_method,
281 min_partition_order, max_partition_order, lpc_type, lpc_passes.
282 Corresponding FLAC encoder options should be used instead.
284 2011-04-26 - bebe72f - lavu 51.1.0 - avutil.h
285 Add AVPictureType enum and av_get_picture_type_char(), deprecate
286 FF_*_TYPE defines and av_get_pict_type_char() defined in
287 libavcodec/avcodec.h.
289 2011-04-26 - 10d3940 - lavfi 2.3.0 - avfilter.h
290 Add pict_type and key_frame fields to AVFilterBufferRefVideo.
292 2011-04-26 - 7a11c82 - lavfi 2.2.0 - vsrc_buffer
293 Add sample_aspect_ratio fields to vsrc_buffer arguments
295 2011-04-21 - 94f7451 - lavc 53.1.0 - avcodec.h
296 Add CODEC_CAP_SLICE_THREADS for codecs supporting sliced threading.
298 2011-04-15 - lavc 52.120.0 - avcodec.h
299 AVPacket structure got additional members for passing side information:
300 4de339e introduce side information for AVPacket
301 2d8591c make containers pass palette change in AVPacket
303 2011-04-12 - lavf 52.107.0 - avio.h
304 Avio cleanup, part II - deprecate the entire URLContext API:
305 175389c add avio_check as a replacement for url_exist
306 ff1ec0c add avio_pause and avio_seek_time as replacements
307 for _av_url_read_fseek/fpause
308 cdc6a87 deprecate av_protocol_next(), avio_enum_protocols
309 should be used instead.
310 80c6e23 rename url_set_interrupt_cb->avio_set_interrupt_cb.
311 f87b1b3 rename open flags: URL_* -> AVIO_*
312 f8270bb add avio_enum_protocols.
313 5593f03 deprecate URLProtocol.
314 c486dad deprecate URLContext.
315 026e175 deprecate the typedef for URLInterruptCB
316 8e76a19 deprecate av_register_protocol2.
317 b840484 deprecate URL_PROTOCOL_FLAG_NESTED_SCHEME
318 1305d93 deprecate av_url_read_seek
319 fa104e1 deprecate av_url_read_pause
320 727c7aa deprecate url_get_filename().
321 5958df3 deprecate url_max_packet_size().
322 1869ea0 deprecate url_get_file_handle().
323 32a97d4 deprecate url_filesize().
324 e52a914 deprecate url_close().
325 58a48c6 deprecate url_seek().
326 925e908 deprecate url_write().
327 dce3756 deprecate url_read_complete().
328 bc371ac deprecate url_read().
329 0589da0 deprecate url_open().
330 62eaaea deprecate url_connect.
331 5652bb9 deprecate url_alloc.
332 333e894 deprecate url_open_protocol
333 e230705 deprecate url_poll and URLPollEntry
335 2011-04-10 - lavu 50.40.0 - pixfmt.h
336 Add PIX_FMT_BGR48LE and PIX_FMT_BGR48BE pixel formats
338 2011-04-08 - lavf 52.106.0 - avformat.h
339 Minor avformat.h cleanup:
340 a9bf9d8 deprecate av_guess_image2_codec
341 c3675df rename avf_sdp_create->av_sdp_create
343 2011-04-03 - lavf 52.105.0 - avio.h
344 Large-scale renaming/deprecating of AVIOContext-related functions:
345 724f6a0 deprecate url_fdopen
346 403ee83 deprecate url_open_dyn_packet_buf
347 6dc7d80 rename url_close_dyn_buf -> avio_close_dyn_buf
348 b92c545 rename url_open_dyn_buf -> avio_open_dyn_buf
349 8978fed introduce an AVIOContext.seekable field as a replacement for
350 AVIOContext.is_streamed and url_is_streamed()
351 b64030f deprecate get_checksum()
352 4c4427a deprecate init_checksum()
353 4ec153b deprecate udp_set_remote_url/get_local_port
354 933e90a deprecate av_url_read_fseek/fpause
355 8d9769a deprecate url_fileno
356 b7f2fdd rename put_flush_packet -> avio_flush
357 35f1023 deprecate url_close_buf
358 83fddae deprecate url_open_buf
359 d9d86e0 rename url_fprintf -> avio_printf
360 59f65d9 deprecate url_setbufsize
361 3e68b3b deprecate url_ferror
362 66e5b1d deprecate url_feof
363 e8bb2e2 deprecate url_fget_max_packet_size
364 76aa876 rename url_fsize -> avio_size
365 e519753 deprecate url_fgetc
366 655e45e deprecate url_fgets
367 a2704c9 rename url_ftell -> avio_tell
368 e16ead0 deprecate get_strz() in favor of avio_get_str
369 0300db8,2af07d3 rename url_fskip -> avio_skip
370 6b4aa5d rename url_fseek -> avio_seek
371 61840b4 deprecate put_tag
372 22a3212 rename url_fopen/fclose -> avio_open/close.
373 0ac8e2b deprecate put_nbyte
374 77eb550 rename put_byte -> avio_w8
375 put_[b/l]e<type> -> avio_w[b/l]<type>
376 put_buffer -> avio_write
377 b7effd4 rename get_byte -> avio_r8,
378 get_[b/l]e<type> -> avio_r[b/l]<type>
379 get_buffer -> avio_read
380 b3db9ce deprecate get_partial_buffer
381 8d9ac96 rename av_alloc_put_byte -> avio_alloc_context
383 2011-03-25 - 34b47d7 - lavc 52.115.0 - AVCodecContext.audio_service_type
384 Add audio_service_type field to AVCodecContext.
386 2011-03-02 - 863c471 - lavf 52.103.0 - av_pkt_dump2, av_pkt_dump_log2
387 Add new functions av_pkt_dump2, av_pkt_dump_log2 that uses the
388 source stream timebase for outputting timestamps. Deprecate
389 av_pkt_dump and av_pkt_dump_log.
391 2011-02-20 - e731b8d - lavf 52.102.0 - avio.h
392 * e731b8d - rename init_put_byte() to ffio_init_context(), deprecating the
393 original, and move it to a private header so it is no longer
394 part of our public API. Instead, use av_alloc_put_byte().
395 * ae628ec - rename ByteIOContext to AVIOContext.
397 2011-02-16 - 09d171b - lavf 52.101.0 - avformat.h
398 lavu 52.39.0 - parseutils.h
399 * 610219a - Add av_ prefix to dump_format().
400 * f6c7375 - Replace parse_date() in lavf with av_parse_time() in lavu.
401 * ab0287f - Move find_info_tag from lavf to lavu and add av_prefix to it.
403 2011-02-15 - lavu 52.38.0 - merge libavcore
404 libavcore is merged back completely into libavutil
406 2011-02-10 - 55bad0c - lavc 52.113.0 - vbv_delay
407 Add vbv_delay field to AVCodecContext
409 2011-02-14 - 24a83bd - lavf 52.100.0 - AV_DISPOSITION_CLEAN_EFFECTS
410 Add AV_DISPOSITION_CLEAN_EFFECTS disposition flag.
412 2011-02-14 - 910b5b8 - lavfi 1.76.0 - AVFilterLink sample_aspect_ratio
413 Add sample_aspect_ratio field to AVFilterLink.
415 2011-02-10 - 12c14cd - lavf 52.99.0 - AVStream.disposition
416 Add AV_DISPOSITION_HEARING_IMPAIRED and AV_DISPOSITION_VISUAL_IMPAIRED.
418 2011-02-09 - 5592734 - lavc 52.112.0 - avcodec_thread_init()
419 Deprecate avcodec_thread_init()/avcodec_thread_free() use; instead
420 set thread_count before calling avcodec_open.
422 2011-02-09 - 778b08a - lavc 52.111.0 - threading API
423 Add CODEC_CAP_FRAME_THREADS with new restrictions on get_buffer()/
424 release_buffer()/draw_horiz_band() callbacks for appropriate codecs.
425 Add thread_type and active_thread_type fields to AVCodecContext.
427 2011-02-08 - 3940caa - lavf 52.98.0 - av_probe_input_buffer
428 Add av_probe_input_buffer() to avformat.h for probing format from a
431 2011-02-06 - fe174fc - lavf 52.97.0 - avio.h
432 Add flag for non-blocking protocols: URL_FLAG_NONBLOCK
434 2011-02-04 - f124b08 - lavf 52.96.0 - avformat_free_context()
435 Add avformat_free_context() in avformat.h.
437 2011-02-03 - f5b82f4 - lavc 52.109.0 - add CODEC_ID_PRORES
438 Add CODEC_ID_PRORES to avcodec.h.
440 2011-02-03 - fe9a3fb - lavc 52.109.0 - H.264 profile defines
441 Add defines for H.264 * Constrained Baseline and Intra profiles
443 2011-02-02 - lavf 52.95.0
444 * 50196a9 - add a new installed header version.h.
445 * 4efd5cf, dccbd97, 93b78d1 - add several variants of public
446 avio_{put,get}_str* functions. Deprecate corresponding semi-public
449 2011-02-02 - dfd2a00 - lavu 50.37.0 - log.h
452 2011-01-15 - a242ac3 - lavfi 1.74.0 - AVFilterBufferRefAudioProps
453 Rename AVFilterBufferRefAudioProps.samples_nb to nb_samples.
455 2011-01-14 - 7f88a5b - lavf 52.93.0 - av_metadata_copy()
456 Add av_metadata_copy() in avformat.h.
458 2011-01-07 - 81c623f - lavc 52.107.0 - deprecate reordered_opaque
459 Deprecate reordered_opaque in favor of pkt_pts/dts.
461 2011-01-07 - 1919fea - lavc 52.106.0 - pkt_dts
462 Add pkt_dts to AVFrame, this will in the future allow multithreading decoders
465 2011-01-07 - 393cbb9 - lavc 52.105.0 - pkt_pts
466 Add pkt_pts to AVFrame.
468 2011-01-07 - 060ec0a - lavc 52.104.0 - av_get_profile_name()
469 Add av_get_profile_name to libavcodec/avcodec.h.
471 2010-12-27 - 0ccabee - lavfi 1.71.0 - AV_PERM_NEG_LINESIZES
472 Add AV_PERM_NEG_LINESIZES in avfilter.h.
474 2010-12-27 - 9128ae0 - lavf 52.91.0 - av_find_best_stream()
475 Add av_find_best_stream to libavformat/avformat.h.
477 2010-12-27 - 107a7e3 - lavf 52.90.0
478 Add AVFMT_NOSTREAMS flag for formats with no streams,
479 like e.g. text metadata.
481 2010-12-22 - 0328b9e - lavu 50.36.0 - file.h
482 Add functions av_file_map() and av_file_unmap() in file.h.
484 2010-12-19 - 0bc55f5 - lavu 50.35.0 - error.h
485 Add "not found" error codes:
486 AVERROR_DEMUXER_NOT_FOUND
487 AVERROR_MUXER_NOT_FOUND
488 AVERROR_DECODER_NOT_FOUND
489 AVERROR_ENCODER_NOT_FOUND
490 AVERROR_PROTOCOL_NOT_FOUND
491 AVERROR_FILTER_NOT_FOUND
492 AVERROR_BSF_NOT_FOUND
493 AVERROR_STREAM_NOT_FOUND
495 2010-12-09 - c61cdd0 - lavcore 0.16.0 - avcore.h
496 Move AV_NOPTS_VALUE, AV_TIME_BASE, AV_TIME_BASE_Q symbols from
497 avcodec.h to avcore.h.
499 2010-12-04 - 16cfc96 - lavc 52.98.0 - CODEC_CAP_NEG_LINESIZES
500 Add CODEC_CAP_NEG_LINESIZES codec capability flag in avcodec.h.
502 2010-12-04 - bb4afa1 - lavu 50.34.0 - av_get_pix_fmt_string()
503 Deprecate avcodec_pix_fmt_string() in favor of
504 pixdesc.h/av_get_pix_fmt_string().
506 2010-12-04 - 4da12e3 - lavcore 0.15.0 - av_image_alloc()
507 Add av_image_alloc() to libavcore/imgutils.h.
509 2010-12-02 - 037be76 - lavfi 1.67.0 - avfilter_graph_create_filter()
510 Add function avfilter_graph_create_filter() in avfiltergraph.h.
512 2010-11-25 - 4723bc2 - lavfi 1.65.0 - avfilter_get_video_buffer_ref_from_arrays()
513 Add function avfilter_get_video_buffer_ref_from_arrays() in
516 2010-11-21 - 176a615 - lavcore 0.14.0 - audioconvert.h
517 Add a public audio channel API in audioconvert.h, and deprecate the
518 corresponding functions in libavcodec:
519 avcodec_get_channel_name()
520 avcodec_get_channel_layout()
521 avcodec_get_channel_layout_string()
522 avcodec_channel_layout_num_channels()
523 and the CH_* macros defined in libavcodec/avcodec.h.
525 2010-11-21 - 6bfc268 - lavf 52.85.0 - avformat.h
526 Add av_append_packet().
528 2010-11-21 - a08d918 - lavc 52.97.0 - avcodec.h
529 Add av_grow_packet().
531 2010-11-17 - 0985e1a - lavcore 0.13.0 - parseutils.h
532 Add av_parse_color() declared in libavcore/parseutils.h.
534 2010-11-13 - cb2c971 - lavc 52.95.0 - AVCodecContext
535 Add AVCodecContext.subtitle_header and AVCodecContext.subtitle_header_size
538 2010-11-13 - 5aaea02 - lavfi 1.62.0 - avfiltergraph.h
539 Make avfiltergraph.h public.
541 2010-11-13 - 4fcbb2a - lavfi 1.61.0 - avfiltergraph.h
542 Remove declarations from avfiltergraph.h for the functions:
543 avfilter_graph_check_validity()
544 avfilter_graph_config_links()
545 avfilter_graph_config_formats()
546 which are now internal.
547 Use avfilter_graph_config() instead.
549 2010-11-08 - d2af720 - lavu 50.33.0 - eval.h
551 av_parse_and_eval_expr(),
555 in favor of the functions:
556 av_expr_parse_and_eval(),
561 2010-11-08 - 24de0ed - lavfi 1.59.0 - avfilter_free()
562 Rename avfilter_destroy() to avfilter_free().
563 This change breaks libavfilter API/ABI.
565 2010-11-07 - 1e80a0e - lavfi 1.58.0 - avfiltergraph.h
566 Remove graphparser.h header, move AVFilterInOut and
567 avfilter_graph_parse() declarations to libavfilter/avfiltergraph.h.
569 2010-11-07 - 7313132 - lavfi 1.57.0 - AVFilterInOut
570 Rename field AVFilterInOut.filter to AVFilterInOut.filter_ctx.
571 This change breaks libavfilter API.
573 2010-11-04 - 97dd1e4 - lavfi 1.56.0 - avfilter_graph_free()
574 Rename avfilter_graph_destroy() to avfilter_graph_free().
575 This change breaks libavfilter API/ABI.
577 2010-11-04 - e15aeea - lavfi 1.55.0 - avfilter_graph_alloc()
578 Add avfilter_graph_alloc() to libavfilter/avfiltergraph.h.
580 2010-11-02 - 6f84cd1 - lavcore 0.12.0 - av_get_bits_per_sample_fmt()
581 Add av_get_bits_per_sample_fmt() to libavcore/samplefmt.h and
582 deprecate av_get_bits_per_sample_format().
584 2010-11-02 - d63e456 - lavcore 0.11.0 - samplefmt.h
585 Add sample format functions in libavcore/samplefmt.h:
586 av_get_sample_fmt_name(),
588 av_get_sample_fmt_string(),
589 and deprecate the corresponding libavcodec/audioconvert.h functions:
590 avcodec_get_sample_fmt_name(),
591 avcodec_get_sample_fmt(),
592 avcodec_sample_fmt_string().
594 2010-11-02 - 262d1c5 - lavcore 0.10.0 - samplefmt.h
595 Define enum AVSampleFormat in libavcore/samplefmt.h, deprecate enum
598 2010-10-16 - 2a24df9 - lavfi 1.52.0 - avfilter_graph_config()
599 Add the function avfilter_graph_config() in avfiltergraph.h.
601 2010-10-15 - 03700d3 - lavf 52.83.0 - metadata API
602 Change demuxers to export metadata in generic format and
603 muxers to accept generic format. Deprecate the public
606 2010-10-10 - 867ae7a - lavfi 1.49.0 - AVFilterLink.time_base
607 Add time_base field to AVFilterLink.
609 2010-09-27 - c85eef4 - lavu 50.31.0 - av_set_options_string()
610 Move av_set_options_string() from libavfilter/parseutils.h to
613 2010-09-27 - acc0490 - lavfi 1.47.0 - AVFilterLink
614 Make the AVFilterLink fields srcpad and dstpad store the pointers to
615 the source and destination pads, rather than their indexes.
617 2010-09-27 - 372e288 - lavu 50.30.0 - av_get_token()
618 Move av_get_token() from libavfilter/parseutils.h to
619 libavutil/avstring.h.
621 2010-09-26 - 635d4ae - lsws 0.12.0 - swscale.h
622 Add the functions sws_alloc_context() and sws_init_context().
624 2010-09-26 - 6ed0404 - lavu 50.29.0 - opt.h
625 Move libavcodec/opt.h to libavutil/opt.h.
627 2010-09-24 - 1c1c80f - lavu 50.28.0 - av_log_set_flags()
628 Default of av_log() changed due to many problems to the old no repeat
629 detection. Read the docs of AV_LOG_SKIP_REPEATED in log.h before
630 enabling it for your app!.
632 2010-09-24 - f66eb58 - lavc 52.90.0 - av_opt_show2()
633 Deprecate av_opt_show() in favor or av_opt_show2().
635 2010-09-14 - bc6f0af - lavu 50.27.0 - av_popcount()
636 Add av_popcount() to libavutil/common.h.
638 2010-09-08 - c6c98d0 - lavu 50.26.0 - av_get_cpu_flags()
639 Add av_get_cpu_flags().
641 2010-09-07 - 34017fd - lavcore 0.9.0 - av_image_copy()
644 2010-09-07 - 9686abb - lavcore 0.8.0 - av_image_copy_plane()
645 Add av_image_copy_plane().
647 2010-09-07 - 9b7269e - lavcore 0.7.0 - imgutils.h
648 Adopt hierarchical scheme for the imgutils.h function names,
649 deprecate the old names.
651 2010-09-04 - 7160bb7 - lavu 50.25.0 - AV_CPU_FLAG_*
652 Deprecate the FF_MM_* flags defined in libavcodec/avcodec.h in favor
653 of the AV_CPU_FLAG_* flags defined in libavutil/cpu.h.
655 2010-08-26 - 5da19b5 - lavc 52.87.0 - avcodec_get_channel_layout()
656 Add avcodec_get_channel_layout() in audioconvert.h.
658 2010-08-20 - e344336 - lavcore 0.6.0 - av_fill_image_max_pixsteps()
659 Rename av_fill_image_max_pixstep() to av_fill_image_max_pixsteps().
661 2010-08-18 - a6ddf8b - lavcore 0.5.0 - av_fill_image_max_pixstep()
662 Add av_fill_image_max_pixstep() in imgutils.h.
664 2010-08-17 - 4f2d2e4 - lavu 50.24.0 - AV_NE()
667 2010-08-17 - ad2c950 - lavfi 1.36.0 - audio framework
668 Implement AVFilterBufferRefAudioProps struct for audio properties,
669 get_audio_buffer(), filter_samples() functions and related changes.
671 2010-08-12 - 81c1eca - lavcore 0.4.0 - av_get_image_linesize()
672 Add av_get_image_linesize() in imgutils.h.
674 2010-08-11 - c1db7bf - lavfi 1.34.0 - AVFilterBufferRef
675 Resize data and linesize arrays in AVFilterBufferRef to 8.
677 This change breaks libavfilter API/ABI.
679 2010-08-11 - 9f08d80 - lavc 52.85.0 - av_picture_data_copy()
680 Add av_picture_data_copy in avcodec.h.
682 2010-08-11 - 84c0386 - lavfi 1.33.0 - avfilter_open()
683 Change avfilter_open() signature:
684 AVFilterContext *avfilter_open(AVFilter *filter, const char *inst_name) ->
685 int avfilter_open(AVFilterContext **filter_ctx, AVFilter *filter, const char *inst_name);
687 This change breaks libavfilter API/ABI.
689 2010-08-11 - cc80caf - lavfi 1.32.0 - AVFilterBufferRef
690 Add a type field to AVFilterBufferRef, and move video specific
691 properties to AVFilterBufferRefVideoProps.
693 This change breaks libavfilter API/ABI.
695 2010-08-07 - 5d4890d - lavfi 1.31.0 - AVFilterLink
696 Rename AVFilterLink fields:
697 AVFilterLink.srcpic -> AVFilterLink.src_buf
698 AVFilterLink.cur_pic -> AVFilterLink.cur_buf
699 AVFilterLink.outpic -> AVFilterLink.out_buf
701 2010-08-07 - 7fce481 - lavfi 1.30.0
702 Rename functions and fields:
703 avfilter_(un)ref_pic -> avfilter_(un)ref_buffer
704 avfilter_copy_picref_props -> avfilter_copy_buffer_ref_props
705 AVFilterBufferRef.pic -> AVFilterBufferRef.buffer
707 2010-08-07 - ecc8dad - lavfi 1.29.0 - AVFilterBufferRef
708 Rename AVFilterPicRef to AVFilterBufferRef.
710 2010-08-07 - d54e094 - lavfi 1.28.0 - AVFilterBuffer
711 Move format field from AVFilterBuffer to AVFilterPicRef.
713 2010-08-06 - bf176f5 - lavcore 0.3.0 - av_check_image_size()
714 Deprecate avcodec_check_dimensions() in favor of the function
715 av_check_image_size() defined in libavcore/imgutils.h.
717 2010-07-30 - 56b5e9d - lavfi 1.27.0 - AVFilterBuffer
718 Increase size of the arrays AVFilterBuffer.data and
719 AVFilterBuffer.linesize from 4 to 8.
721 This change breaks libavfilter ABI.
723 2010-07-29 - e7bd48a - lavcore 0.2.0 - imgutils.h
724 Add functions av_fill_image_linesizes() and
725 av_fill_image_pointers(), declared in libavcore/imgutils.h.
727 2010-07-27 - 126b638 - lavcore 0.1.0 - parseutils.h
728 Deprecate av_parse_video_frame_size() and av_parse_video_frame_rate()
729 defined in libavcodec in favor of the newly added functions
730 av_parse_video_size() and av_parse_video_rate() declared in
731 libavcore/parseutils.h.
733 2010-07-23 - 4485247 - lavu 50.23.0 - mathematics.h
734 Add the M_PHI constant definition.
736 2010-07-22 - bdab614 - lavfi 1.26.0 - media format generalization
737 Add a type field to AVFilterLink.
739 Change the field types:
740 enum PixelFormat format -> int format in AVFilterBuffer
741 enum PixelFormat *formats -> int *formats in AVFilterFormats
742 enum PixelFormat *format -> int format in AVFilterLink
744 Change the function signatures:
745 AVFilterFormats *avfilter_make_format_list(const enum PixelFormat *pix_fmts); ->
746 AVFilterFormats *avfilter_make_format_list(const int *fmts);
748 int avfilter_add_colorspace(AVFilterFormats **avff, enum PixelFormat pix_fmt); ->
749 int avfilter_add_format (AVFilterFormats **avff, int fmt);
751 AVFilterFormats *avfilter_all_colorspaces(void); ->
752 AVFilterFormats *avfilter_all_formats (enum AVMediaType type);
754 This change breaks libavfilter API/ABI.
756 2010-07-21 - aac6ca6 - lavcore 0.0.0
759 2010-07-17 - b5c582f - lavfi 1.25.0 - AVFilterBuffer
760 Remove w and h fields from AVFilterBuffer.
762 2010-07-17 - f0d77b2 - lavfi 1.24.0 - AVFilterBuffer
763 Rename AVFilterPic to AVFilterBuffer.
765 2010-07-17 - 57fe80f - lavf 52.74.0 - url_fskip()
766 Make url_fskip() return an int error code instead of void.
768 2010-07-11 - 23940f1 - lavc 52.83.0
769 Add AVCodecContext.lpc_type and AVCodecContext.lpc_passes fields.
771 Deprecate AVCodecContext.use_lpc.
773 2010-07-11 - e1d7c88 - lavc 52.82.0 - avsubtitle_free()
774 Add a function for free the contents of a AVSubtitle generated by
775 avcodec_decode_subtitle.
777 2010-07-11 - b91d08f - lavu 50.22.0 - bswap.h and intreadwrite.h
778 Make the bswap.h and intreadwrite.h API public.
780 2010-07-08 - ce1cd1c - lavu 50.21.0 - pixdesc.h
781 Rename read/write_line() to av_read/write_image_line().
783 2010-07-07 - 4d508e4 - lavfi 1.21.0 - avfilter_copy_picref_props()
784 Add avfilter_copy_picref_props().
786 2010-07-03 - 2d525ef - lavc 52.79.0
787 Add FF_COMPLIANCE_UNOFFICIAL and change all instances of
788 FF_COMPLIANCE_INOFFICIAL to use FF_COMPLIANCE_UNOFFICIAL.
790 2010-07-02 - 89eec74 - lavu 50.20.0 - lfg.h
791 Export av_lfg_init(), av_lfg_get(), av_mlfg_get(), and av_bmg_get() through
794 2010-06-28 - a52e2c3 - lavfi 1.20.1 - av_parse_color()
795 Extend av_parse_color() syntax, make it accept an alpha value specifier and
796 set the alpha value to 255 by default.
798 2010-06-22 - 735cf6b - lavf 52.71.0 - URLProtocol.priv_data_size, priv_data_class
799 Add priv_data_size and priv_data_class to URLProtocol.
801 2010-06-22 - ffbb289 - lavf 52.70.0 - url_alloc(), url_connect()
802 Add url_alloc() and url_connect().
804 2010-06-22 - 9b07a2d - lavf 52.69.0 - av_register_protocol2()
805 Add av_register_protocol2(), deprecating av_register_protocol().
807 2010-06-09 - 65db058 - lavu 50.19.0 - av_compare_mod()
808 Add av_compare_mod() to libavutil/mathematics.h.
810 2010-06-05 - 0b99215 - lavu 50.18.0 - eval API
811 Make the eval API public.
813 2010-06-04 - 31878fc - lavu 50.17.0 - AV_BASE64_SIZE
814 Add AV_BASE64_SIZE() macro.
816 2010-06-02 - 7e566bb - lavc 52.73.0 - av_get_codec_tag_string()
817 Add av_get_codec_tag_string().
819 2010-06-01 - 2b99142 - lsws 0.11.0 - convertPalette API
820 Add sws_convertPalette8ToPacked32() and sws_convertPalette8ToPacked24().
822 2010-05-26 - 93ebfee - lavc 52.72.0 - CODEC_CAP_EXPERIMENTAL
823 Add CODEC_CAP_EXPERIMENTAL flag.
824 NOTE: this was backported to 0.6
826 2010-05-23 - 9977863 - lavu 50.16.0 - av_get_random_seed()
827 Add av_get_random_seed().
829 2010-05-18 - 796ac23 - lavf 52.63.0 - AVFMT_FLAG_RTP_HINT
830 Add AVFMT_FLAG_RTP_HINT as possible value for AVFormatContext.flags.
831 NOTE: this was backported to 0.6
833 2010-05-09 - b6bc205 - lavfi 1.20.0 - AVFilterPicRef
834 Add interlaced and top_field_first fields to AVFilterPicRef.
836 ------------------------------8<-------------------------------------
837 0.6 branch was cut here
838 ----------------------------->8--------------------------------------
840 2010-05-01 - 8e2ee18 - lavf 52.62.0 - probe function
841 Add av_probe_input_format2 to API, it allows ignoring probe
842 results below given score and returns the actual probe score.
844 2010-04-01 - 3dd6180 - lavf 52.61.0 - metadata API
845 Add a flag for av_metadata_set2() to disable overwriting of
848 2010-04-01 - 0fb49b5 - lavc 52.66.0
849 Add avcodec_get_edge_width().
851 2010-03-31 - d103218 - lavc 52.65.0
852 Add avcodec_copy_context().
854 2010-03-31 - 1a70d12 - lavf 52.60.0 - av_match_ext()
855 Make av_match_ext() public.
857 2010-03-31 - 1149150 - lavu 50.14.0 - AVMediaType
858 Move AVMediaType enum from libavcodec to libavutil.
860 2010-03-31 - 72415b2 - lavc 52.64.0 - AVMediaType
861 Define AVMediaType enum, and use it instead of enum CodecType, which
862 is deprecated and will be dropped at the next major bump.
864 2010-03-25 - 8795823 - lavu 50.13.0 - av_strerror()
865 Implement av_strerror().
867 2010-03-23 - e1484eb - lavc 52.60.0 - av_dct_init()
868 Support DCT-I and DST-I.
870 2010-03-15 - b8819c8 - lavf 52.56.0 - AVFormatContext.start_time_realtime
871 Add AVFormatContext.start_time_realtime field.
873 2010-03-13 - 5bb5c1d - lavfi 1.18.0 - AVFilterPicRef.pos
874 Add AVFilterPicRef.pos field.
876 2010-03-13 - 60c144f - lavu 50.12.0 - error.h
877 Move error code definitions from libavcodec/avcodec.h to
878 the new public header libavutil/error.h.
880 2010-03-07 - c709483 - lavc 52.56.0 - avfft.h
881 Add public FFT interface.
883 2010-03-06 - ac6ef86 - lavu 50.11.0 - av_stristr()
886 2010-03-03 - 4b83fc0 - lavu 50.10.0 - av_tree_enumerate()
887 Add av_tree_enumerate().
889 2010-02-07 - b687c1a - lavu 50.9.0 - av_compare_ts()
892 2010-02-05 - 3f3dc76 - lsws 0.10.0 - sws_getCoefficients()
893 Add sws_getCoefficients().
895 2010-02-01 - ca76a11 - lavf 52.50.0 - metadata API
896 Add a list of generic tag names, change 'author' -> 'artist',
899 2010-01-30 - 80a07f6 - lavu 50.8.0 - av_get_pix_fmt()
900 Add av_get_pix_fmt().
902 2010-01-21 - 01cc47d - lsws 0.9.0 - sws_scale()
903 Change constness attributes of sws_scale() parameters.
905 2010-01-10 - 3fb8e77 - lavfi 1.15.0 - avfilter_graph_config_links()
906 Add a log_ctx parameter to avfilter_graph_config_links().
908 2010-01-07 - 8e9767f - lsws 0.8.0 - sws_isSupported{In,Out}put()
909 Add sws_isSupportedInput() and sws_isSupportedOutput() functions.
911 2010-01-06 - c1d662f - lavfi 1.14.0 - avfilter_add_colorspace()
912 Change the avfilter_add_colorspace() signature, make it accept an
913 (AVFilterFormats **) rather than an (AVFilterFormats *) as before.
915 2010-01-03 - 4fd1f18 - lavfi 1.13.0 - avfilter_add_colorspace()
916 Add avfilter_add_colorspace().
918 2010-01-02 - 8eb631f - lavf 52.46.0 - av_match_ext()
919 Add av_match_ext(), it should be used in place of match_ext().
921 2010-01-01 - a1f547b - lavf 52.45.0 - av_guess_format()
922 Add av_guess_format(), it should be used in place of guess_format().
924 2009-12-13 - a181981 - lavf 52.43.0 - metadata API
925 Add av_metadata_set2(), AV_METADATA_DONT_STRDUP_KEY and
926 AV_METADATA_DONT_STRDUP_VAL.
928 2009-12-13 - 277c733 - lavu 50.7.0 - avstring.h API
931 2009-12-13 - 02b398e - lavc 52.42.0 - AVStream
934 2009-12-12 - 3ba69a1 - lavu 50.6.0 - av_bmg_next()
935 Introduce the av_bmg_next() function.
937 2009-12-05 - a13a543 - lavfi 1.12.0 - avfilter_draw_slice()
938 Add a slice_dir parameter to avfilter_draw_slice().
940 2009-11-26 - 4cc3f6a - lavfi 1.11.0 - AVFilter
941 Remove the next field from AVFilter, this is not anymore required.
943 2009-11-25 - 1433c4a - lavfi 1.10.0 - avfilter_next()
944 Introduce the avfilter_next() function.
946 2009-11-25 - 86a60fa - lavfi 1.9.0 - avfilter_register()
947 Change the signature of avfilter_register() to make it return an
948 int. This is required since now the registration operation may fail.
950 2009-11-25 - 74a0059 - lavu 50.5.0 - pixdesc.h API
951 Make the pixdesc.h API public.
953 2009-10-27 - 243110f - lavfi 1.5.0 - AVFilter.next
954 Add a next field to AVFilter, this is used for simplifying the
955 registration and management of the registered filters.
957 2009-10-23 - cccd292 - lavfi 1.4.1 - AVFilter.description
958 Add a description field to AVFilter.
960 2009-10-19 - 6b5dc05 - lavfi 1.3.0 - avfilter_make_format_list()
961 Change the interface of avfilter_make_format_list() from
962 avfilter_make_format_list(int n, ...) to
963 avfilter_make_format_list(enum PixelFormat *pix_fmts).
965 2009-10-18 - 0eb4ff9 - lavfi 1.0.0 - avfilter_get_video_buffer()
966 Make avfilter_get_video_buffer() recursive and add the w and h
969 2009-10-07 - 46c40e4 - lavfi 0.5.1 - AVFilterPic
970 Add w and h fields to AVFilterPic.
972 2009-06-22 - 92400be - lavf 52.34.1 - AVFormatContext.packet_size
973 This is now an unsigned int instead of a signed int.
975 2009-06-19 - a4276ba - lavc 52.32.0 - AVSubtitle.pts
976 Add a pts field to AVSubtitle which gives the subtitle packet pts
977 in AV_TIME_BASE. Some subtitle de-/encoders (e.g. XSUB) will
978 not work right without this.
980 2009-06-03 - 8f3f2e0 - lavc 52.30.2 - AV_PKT_FLAG_KEY
981 PKT_FLAG_KEY has been deprecated and will be dropped at the next
982 major version. Use AV_PKT_FLAG_KEY instead.
984 2009-06-01 - f988ce6 - lavc 52.30.0 - av_lockmgr_register()
985 av_lockmgr_register() can be used to register a callback function
986 that lavc (and in the future, libraries that depend on lavc) can use
987 to implement mutexes. The application should provide a callback function
988 that implements the AV_LOCK_* operations described in avcodec.h.
989 When the lock manager is registered, FFmpeg is guaranteed to behave
990 correctly in a multi-threaded application.
992 2009-04-30 - ce1d9c8 - lavc 52.28.0 - av_free_packet()
993 av_free_packet() is no longer an inline function. It is now exported.
995 2009-04-11 - 80d403f - lavc 52.25.0 - deprecate av_destruct_packet_nofree()
996 Please use NULL instead. This has been supported since r16506
997 (lavf > 52.23.1, lavc > 52.10.0).
999 2009-04-07 - 7a00bba - lavc 52.23.0 - avcodec_decode_video/audio/subtitle
1000 The old decoding functions are deprecated, all new code should use the
1001 new functions avcodec_decode_video2(), avcodec_decode_audio3() and
1002 avcodec_decode_subtitle2(). These new functions take an AVPacket *pkt
1003 argument instead of a const uint8_t *buf / int buf_size pair.
1005 2009-04-03 - 7b09db3 - lavu 50.3.0 - av_fifo_space()
1006 Introduce the av_fifo_space() function.
1008 2009-04-02 - fabd246 - lavc 52.23.0 - AVPacket
1009 Move AVPacket declaration from libavformat/avformat.h to
1010 libavcodec/avcodec.h.
1012 2009-03-22 - 6e08ca9 - lavu 50.2.0 - RGB32 pixel formats
1013 Convert the pixel formats PIX_FMT_ARGB, PIX_FMT_RGBA, PIX_FMT_ABGR,
1014 PIX_FMT_BGRA, which were defined as macros, into enum PixelFormat values.
1015 Conversely PIX_FMT_RGB32, PIX_FMT_RGB32_1, PIX_FMT_BGR32 and
1016 PIX_FMT_BGR32_1 are now macros.
1017 avcodec_get_pix_fmt() now recognizes the "rgb32" and "bgr32" aliases.
1018 Re-sort the enum PixelFormat list accordingly.
1019 This change breaks API/ABI backward compatibility.
1021 2009-03-22 - f82674e - lavu 50.1.0 - PIX_FMT_RGB5X5 endian variants
1022 Add the enum PixelFormat values:
1023 PIX_FMT_RGB565BE, PIX_FMT_RGB565LE, PIX_FMT_RGB555BE, PIX_FMT_RGB555LE,
1024 PIX_FMT_BGR565BE, PIX_FMT_BGR565LE, PIX_FMT_BGR555BE, PIX_FMT_BGR555LE.
1026 2009-03-21 - ee6624e - lavu 50.0.0 - av_random*
1027 The Mersenne Twister PRNG implemented through the av_random* functions
1028 was removed. Use the lagged Fibonacci PRNG through the av_lfg* functions
1031 2009-03-08 - 41dd680 - lavu 50.0.0 - AVFifoBuffer
1032 av_fifo_init, av_fifo_read, av_fifo_write and av_fifo_realloc were dropped
1033 and replaced by av_fifo_alloc, av_fifo_generic_read, av_fifo_generic_write
1034 and av_fifo_realloc2.
1035 In addition, the order of the function arguments of av_fifo_generic_read
1036 was changed to match av_fifo_generic_write.
1037 The AVFifoBuffer/struct AVFifoBuffer may only be used in an opaque way by
1038 applications, they may not use sizeof() or directly access members.
1040 2009-03-01 - ec26457 - lavf 52.31.0 - Generic metadata API
1041 Introduce a new metadata API (see av_metadata_get() and friends).
1042 The old API is now deprecated and should not be used anymore. This especially
1043 includes the following structure fields:
1044 - AVFormatContext.title
1045 - AVFormatContext.author
1046 - AVFormatContext.copyright
1047 - AVFormatContext.comment
1048 - AVFormatContext.album
1049 - AVFormatContext.year
1050 - AVFormatContext.track
1051 - AVFormatContext.genre
1054 - AVProgram.provider_name