PeerStreamer

Never assume the API of libav* to be stable unless at least 1 week has passed since

the last major version increase.

The last version increases were:

libavcodec:  ?

libavcore:   2010-07-21

libavdevice: ?

libavfilter: 2009-10-18

libavformat: ?

libpostproc: ?

libswscale:  ?

libavutil:   2009-03-08

API changes, most recent first:

2010-11-22 - r25826 - lavfi 1.65.0 - avfilter_get_video_buffer_ref_from_arrays()

  Add function avfilter_get_video_buffer_ref_from_arrays() in

  avfilter.h.

2010-11-21 - r25787 - lavcore 0.14.0 - audioconvert.h

  Add a public audio channel API in audioconvert.h, and deprecate the

  corresponding functions in libavcodec:

  avcodec_get_channel_name()

  avcodec_get_channel_layout()

  avcodec_get_channel_layout_string()

  avcodec_channel_layout_num_channels()

  and the CH_* macros defined in libavcodec/avcodec.h.

2010-11-21 - r25777 - lavf 52.85.0 - avformat.h

  Add av_append_packet().

2010-11-21 - r25776 - lavc 52.97.0 - avcodec.h

  Add av_grow_packet().

2010-11-17 - r25761 - lavcore 0.13.0 - parseutils.h

  Add av_parse_color() declared in libavcore/parseutils.h.

2010-11-13 - r25745 - lavc 52.95.0 - AVCodecContext

  Add AVCodecContext.subtitle_header and AVCodecContext.subtitle_header_size

  fields.

2010-11-13 - r25740 - lavfi 1.62.0 - avfiltergraph.h

  Make avfiltergraph.h public.

2010-11-13 - r25737 - lavfi 1.61.0 - avfiltergraph.h

  Remove declarations from avfiltergraph.h for the functions:

  avfilter_graph_check_validity()

  avfilter_graph_config_links()

  avfilter_graph_config_formats()

  which are now internal.

  Use avfilter_graph_config() instead.

2010-11-08 - r25708 - lavu 50.33.0 - eval.h

  Deprecate functions:

  av_parse_and_eval_expr(),

  av_parse_expr(),

  av_eval_expr(),

  av_free_expr(),

  in favor of the functions:

  av_expr_parse_and_eval(),

  av_expr_parse(),

  av_expr_eval(),

  av_expr_free().

2010-11-08 - r25707 - lavfi 1.59.0 - avfilter_free()

  Rename avfilter_destroy() to avfilter_free().

  This change breaks libavfilter API/ABI.

2010-11-07 - r25705 - lavfi 1.58.0 - avfiltergraph.h

  Remove graphparser.h header, move AVFilterInOut and

  avfilter_graph_parse() declarations to libavfilter/avfiltergraph.h.

2010-11-07 - r25700 - lavfi 1.57.0 - AVFilterInOut

  Rename field AVFilterInOut.filter to AVFilterInOut.filter_ctx.

  This change breaks libavfilter API.

2010-11-04 - r25674 - lavfi 1.56.0 - avfilter_graph_free()

  Rename avfilter_graph_destroy() to avfilter_graph_free().

  This change breaks libavfilter API/ABI.

2010-11-04 - r25673 - lavfi 1.55.0 - avfilter_graph_alloc()

  Add avfilter_graph_alloc() to libavfilter/avfiltergraph.h.

2010-11-02 - r25654 - lavcore 0.12.0 - av_get_bits_per_sample_fmt()

  Add av_get_bits_per_sample_fmt() to libavcore/samplefmt.h and

  deprecate av_get_bits_per_sample_format().

2010-11-02 - r25653 - lavcore 0.11.0 - samplefmt.h

  Add sample format functions in libavcore/samplefmt.h:

  av_get_sample_fmt_name(),

  av_get_sample_fmt(),

  av_get_sample_fmt_string(),

  and deprecate the corresponding libavcodec/audioconvert.h functions:

  avcodec_get_sample_fmt_name(),

  avcodec_get_sample_fmt(),

  avcodec_sample_fmt_string().

2010-11-02 - r25652 - lavcore 0.10.0 - samplefmt.h

  Define enum AVSampleFormat in libavcore/samplefmt.h, deprecate enum

  SampleFormat.

2010-10-16 - r25502 - lavfi 1.52.0 - avfilter_graph_config()

  Add the function avfilter_graph_config() in avfiltergraph.h.

2010-10-15 - r25493 - lavf 52.83.0 - metadata API

  Change demuxers to export metadata in generic format and

  muxers to accept generic format. Deprecate the public

  conversion API.

2010-10-10 - r25441 - lavfi 1.49.0 - AVFilterLink.time_base

  Add time_base field to AVFilterLink.

2010-09-27 - r25236 - lavu 50.31.0 - av_set_options_string()

  Move av_set_options_string() from libavfilter/parseutils.h to

  libavutil/opt.h.

2010-09-27 - r25227 - lavfi 1.47.0 - AVFilterLink

  Make the AVFilterLink fields srcpad and dstpad store the pointers to

  the source and destination pads, rather than their indexes.

2010-09-27 - r25225 - lavu 50.30.0 - av_get_token()

  Move av_get_token() from libavfilter/parseutils.h to

  libavutil/avstring.h.

2010-09-26 - r32368 - lsws 0.12.0 - swscale.h

  Add the functions sws_alloc_context() and sws_init_context().

2010-09-26 - r25210 - lavu 50.29.0 - opt.h

  Move libavcodec/opt.h to libavutil/opt.h.

2010-09-24 - r25174 - lavu 50.28.0 - av_log_set_flags()

  Default of av_log() changed due to many problems to the old no repeat

  detection. Read the docs of AV_LOG_SKIP_REPEATED in log.h before

  enabling it for your app!.

2010-09-24 - r25167 - lavc 52.90.0 - av_opt_show2()

  Deprecate av_opt_show() in favor or av_opt_show2().

2010-09-14 - r25120 - lavu 50.27.0 - av_popcount()

  Add av_popcount() to libavutil/common.h.

2010-09-08 - r25076 - lavu 50.26.0 - av_get_cpu_flags()

  Add av_get_cpu_flags().

2010-09-07 - r25067 - lavcore 0.9.0 - av_image_copy()

  Add av_image_copy().

2010-09-07 - r25064 - lavcore 0.8.0 - av_image_copy_plane()

  Add av_image_copy_plane().

2010-09-07 - r25057 - lavcore 0.7.0 - imgutils.h

  Adopt hierarchical scheme for the imgutils.h function names,

  deprecate the old names.

2010-09-04 - r25040 - lavu 50.25.0 - AV_CPU_FLAG_*

  Deprecate the FF_MM_* flags defined in libavcodec/avcodec.h in favor

  of the AV_CPU_FLAG_* flags defined in libavutil/cpu.h.

2010-08-26 - r24936 - lavc 52.87.0 - avcodec_get_channel_layout()

  Add avcodec_get_channel_layout() in audioconvert.h.

2010-08-20 - r24851 - lavcore 0.6.0 - av_fill_image_max_pixsteps()

  Rename av_fill_image_max_pixstep() to av_fill_image_max_pixsteps().

2010-08-18 - r24827 - lavcore 0.5.0 - av_fill_image_max_pixstep()

  Add av_fill_image_max_pixstep() in imgutils.h.

2010-08-17 - r24814 - lavu 50.24.0 - AV_NE()

  Add the AV_NE macro.

2010-08-17 - r24811 - lavfi 1.36.0 - audio framework

  Implement AVFilterBufferRefAudioProps struct for audio properties,

  get_audio_buffer(), filter_samples() functions and related changes.

2010-08-12 - r24787 - lavcore 0.4.0 - av_get_image_linesize()

  Add av_get_image_linesize() in imgutils.h.

2010-08-11 - r24773 - lavfi 1.34.0 - AVFilterBufferRef

  Resize data and linesize arrays in AVFilterBufferRef to 8.

  This change breaks libavfilter API/ABI.

2010-08-11 - r24768 - lavc 52.85.0 - av_picture_data_copy()

  Add av_picture_data_copy in avcodec.h.

2010-08-11 - r24765 - lavfi 1.33.0 - avfilter_open()

  Change avfilter_open() signature:

  AVFilterContext *avfilter_open(AVFilter *filter, const char *inst_name) ->

  int avfilter_open(AVFilterContext **filter_ctx, AVFilter *filter, const char *inst_name);

  This change breaks libavfilter API/ABI.

2010-08-11 - r24763 - lavfi 1.32.0 - AVFilterBufferRef

  Add a type field to AVFilterBufferRef, and move video specific

  properties to AVFilterBufferRefVideoProps.

  This change breaks libavfilter API/ABI.

2010-08-07 - r24732 - lavfi 1.31.0 - AVFilterLink

  Rename AVFilterLink fields:

  AVFilterLink.srcpic    ->  AVFilterLink.src_buf

  AVFilterLink.cur_pic   ->  AVFilterLink.cur_buf

  AVFilterLink.outpic    ->  AVFilterLink.out_buf

2010-08-07 - r24731 - lavfi 1.30.0

  Rename functions and fields:

  avfilter_(un)ref_pic       -> avfilter_(un)ref_buffer

  avfilter_copy_picref_props -> avfilter_copy_buffer_ref_props

  AVFilterBufferRef.pic      -> AVFilterBufferRef.buffer

2010-08-07 - r24730 - lavfi 1.29.0 - AVFilterBufferRef

  Rename AVFilterPicRef to AVFilterBufferRef.

2010-08-07 - r24728 - lavfi 1.28.0 - AVFilterBuffer

  Move format field from AVFilterBuffer to AVFilterPicRef.

2010-08-06 - r24709 - lavcore 0.3.0 - av_check_image_size()

  Deprecate avcodec_check_dimensions() in favor of the function

  av_check_image_size() defined in libavcore/imgutils.h.

2010-07-30 - r24592 - lavfi 1.27.0 - AVFilterBuffer

  Increase size of the arrays AVFilterBuffer.data and

  AVFilterBuffer.linesize from 4 to 8.

  This change breaks libavfilter ABI.

2010-07-29 - r24583 - lavcore 0.2.0 - imgutils.h

  Add functions av_fill_image_linesizes() and

  av_fill_image_pointers(), declared in libavcore/imgutils.h.

2010-07-27 - r24518 - lavcore 0.1.0 - parseutils.h

  Deprecate av_parse_video_frame_size() and av_parse_video_frame_rate()

  defined in libavcodec in favor of the newly added functions

  av_parse_video_size() and av_parse_video_rate() declared in

  libavcore/parseutils.h.

2010-07-23 - r24439 - lavu 50.23.0 - mathematics.h

  Add the M_PHI constant definition.

2010-07-22 - r24424 - lavfi 1.26.0 - media format generalization

  Add a type field to AVFilterLink.

  Change the field types:

  enum PixelFormat format   -> int format   in AVFilterBuffer

  enum PixelFormat *formats -> int *formats in AVFilterFormats

  enum PixelFormat *format  -> int format   in AVFilterLink

  Change the function signatures:

  AVFilterFormats *avfilter_make_format_list(const enum PixelFormat *pix_fmts); ->

  AVFilterFormats *avfilter_make_format_list(const int *fmts);

  int avfilter_add_colorspace(AVFilterFormats **avff, enum PixelFormat pix_fmt); ->

  int avfilter_add_format    (AVFilterFormats **avff, int fmt);

  AVFilterFormats *avfilter_all_colorspaces(void); ->

  AVFilterFormats *avfilter_all_formats    (enum AVMediaType type);

  This change breaks libavfilter API/ABI.

2010-07-21 - r24393 - lavcore 0.0.0

  Add libavcore.

2010-07-17 - r24291 - lavfi 1.25.0 - AVFilterBuffer

  Remove w and h fields from AVFilterBuffer.

2010-07-17 - r24284 - lavfi 1.24.0 - AVFilterBuffer

  Rename AVFilterPic to AVFilterBuffer.

2010-07-17 - r24278 - lavf 52.74.0 - url_fskip()

  Make url_fskip() return an int error code instead of void.

2010-07-11 - r24199 - lavc 52.83.0

  Add AVCodecContext.lpc_type and AVCodecContext.lpc_passes fields.

  Add AVLPCType enum.

  Deprecate AVCodecContext.use_lpc.

2010-07-11 - r24185 - lavc 52.82.0 - avsubtitle_free()

  Add a function for free the contents of a AVSubtitle generated by

  avcodec_decode_subtitle.

2010-07-11 - r24174 - lavu 50.22.0 - bswap.h and intreadwrite.h

  Make the bswap.h and intreadwrite.h API public.

2010-07-08 - r24101 - lavu 50.21.0 - pixdesc.h

  Rename read/write_line() to av_read/write_image_line().

2010-07-07 - r24091 - lavfi 1.21.0 - avfilter_copy_picref_props()

  Add avfilter_copy_picref_props().

2010-07-03 - r24021 - lavc 52.79.0

  Add FF_COMPLIANCE_UNOFFICIAL and change all instances of

  FF_COMPLIANCE_INOFFICIAL to use FF_COMPLIANCE_UNOFFICIAL.

2010-07-02 - r23985 - lavu 50.20.0 - lfg.h

  Export av_lfg_init(), av_lfg_get(), av_mlfg_get(), and av_bmg_get() through

  lfg.h.

2010-06-28 - r23835 - lavfi 1.20.1 - av_parse_color()

  Extend av_parse_color() syntax, make it accept an alpha value specifier and

  set the alpha value to 255 by default.

2010-06-22 - r23706 - lavf 52.71.0 - URLProtocol.priv_data_size, priv_data_class

  Add priv_data_size and priv_data_class to URLProtocol.

2010-06-22 - r23704 - lavf 52.70.0 - url_alloc(), url_connect()

  Add url_alloc() and url_connect().

2010-06-22 - r23702 - lavf 52.69.0 - av_register_protocol2()

  Add av_register_protocol2(), deprecating av_register_protocol().

2010-06-09 - r23551 - lavu 50.19.0 - av_compare_mod()

  Add av_compare_mod() to libavutil/mathematics.h.

2010-06-05 - r23485 - lavu 50.18.0 - eval API

  Make the eval API public.

2010-06-04 - r23461 - lavu 50.17.0 - AV_BASE64_SIZE

  Add AV_BASE64_SIZE() macro.

2010-06-02 - r23421 - lavc 52.73.0 - av_get_codec_tag_string()

  Add av_get_codec_tag_string().

2010-06-01 - r31301 - lsws 0.11.0 - convertPalette API

  Add sws_convertPalette8ToPacked32() and sws_convertPalette8ToPacked24().

2010-05-26 - r23334 - lavc 52.72.0 - CODEC_CAP_EXPERIMENTAL

  Add CODEC_CAP_EXPERIMENTAL flag.

2010-05-23 - r23255 - lavu 50.16.0 - av_get_random_seed()

  Add av_get_random_seed().

2010-05-18 - r23161 - lavf 52.63.0 - AVFMT_FLAG_RTP_HINT

  Add AVFMT_FLAG_RTP_HINT as possible value for AVFormatContext.flags.

2010-05-09 - r23066 - lavfi 1.20.0 - AVFilterPicRef

  Add interlaced and top_field_first fields to AVFilterPicRef.

2010-05-01 - r23002 - lavf 52.62.0 - probe function

  Add av_probe_input_format2 to API, it allows ignoring probe

  results below given score and returns the actual probe score.

2010-04-01 - r22806 - lavf 52.61.0 - metadata API

  Add a flag for av_metadata_set2() to disable overwriting of

  existing tags.

2010-04-01 - r22753 - lavc 52.66.0

  Add avcodec_get_edge_width().

2010-03-31 - r22750 - lavc 52.65.0

  Add avcodec_copy_context().

2010-03-31 - r22748 - lavf 52.60.0 - av_match_ext()

  Make av_match_ext() public.

2010-03-31 - r22736 - lavu 50.14.0 - AVMediaType

  Move AVMediaType enum from libavcodec to libavutil.

2010-03-31 - r22735 - lavc 52.64.0 - AVMediaType

  Define AVMediaType enum, and use it instead of enum CodecType, which

  is deprecated and will be dropped at the next major bump.

2010-03-25 - r22684 - lavu 50.13.0 - av_strerror()

  Implement av_strerror().

2010-03-23 - r22649 - lavc 52.60.0 - av_dct_init()

  Support DCT-I and DST-I.

2010-03-15 - r22540 - lavf 52.56.0 - AVFormatContext.start_time_realtime

  Add AVFormatContext.start_time_realtime field.

2010-03-13 - r22506 - lavfi 1.18.0 - AVFilterPicRef.pos

  Add AVFilterPicRef.pos field.

2010-03-13 - r22501 - lavu 50.12.0 - error.h

  Move error code definitions from libavcodec/avcodec.h to

  the new public header libavutil/error.h.

2010-03-07 - r22291 - lavc 52.56.0 - avfft.h

  Add public FFT interface.

2010-03-06 - r22251 - lavu 50.11.0 - av_stristr()

  Add av_stristr().

2010-03-03 - r22174 - lavu 50.10.0 - av_tree_enumerate()

  Add av_tree_enumerate().

2010-02-07 - r21673 - lavu 50.9.0 - av_compare_ts()

  Add av_compare_ts().

2010-02-05 - r30513 - lsws 0.10.0 - sws_getCoefficients()

  Add sws_getCoefficients().

2010-02-01 - r21587 - lavf 52.50.0 - metadata API

  Add a list of generic tag names, change 'author' -> 'artist',

  'year' -> 'date'.

2010-01-30 - r21545 - lavu 50.8.0 - av_get_pix_fmt()

  Add av_get_pix_fmt().

2010-01-21 - r30381 - lsws 0.9.0 - sws_scale()

  Change constness attributes of sws_scale() parameters.

2010-01-10 - r21121 - lavfi 1.15.0 - avfilter_graph_config_links()

  Add a log_ctx parameter to avfilter_graph_config_links().

2010-01-07 - r30236 - lsws 0.8.0 - sws_isSupported{In,Out}put()

  Add sws_isSupportedInput() and sws_isSupportedOutput() functions.

2010-01-06 - r21035 - lavfi 1.14.0 - avfilter_add_colorspace()

  Change the avfilter_add_colorspace() signature, make it accept an

  (AVFilterFormats **) rather than an (AVFilterFormats *) as before.

2010-01-03 - r21007 - lavfi 1.13.0 - avfilter_add_colorspace()

  Add avfilter_add_colorspace().

2010-01-02 - r20998 - lavf 52.46.0 - av_match_ext()

  Add av_match_ext(), it should be used in place of match_ext().

2010-01-01 - r20991 - lavf 52.45.0 - av_guess_format()

  Add av_guess_format(), it should be used in place of guess_format().

2009-12-13 - r20834 - lavf 52.43.0 - metadata API

  Add av_metadata_set2(), AV_METADATA_DONT_STRDUP_KEY and

  AV_METADATA_DONT_STRDUP_VAL.

2009-12-13 - r20829 - lavu 50.7.0 - avstring.h API

  Add av_d2str().

2009-12-13 - r20826 - lavc 52.42.0 - AVStream

  Add avg_frame_rate.

2009-12-12 - r20808 - lavu 50.6.0 - av_bmg_next()

  Introduce the av_bmg_next() function.

2009-12-05 - r20734 - lavfi 1.12.0 - avfilter_draw_slice()

  Add a slice_dir parameter to avfilter_draw_slice().

2009-11-26 - r20611 - lavfi 1.11.0 - AVFilter

  Remove the next field from AVFilter, this is not anymore required.

2009-11-25 - r20607 - lavfi 1.10.0 - avfilter_next()

  Introduce the avfilter_next() function.

2009-11-25 - r20605 - lavfi 1.9.0 - avfilter_register()

  Change the signature of avfilter_register() to make it return an

  int. This is required since now the registration operation may fail.

2009-11-25 - r20603 - lavu 50.5.0 - pixdesc.h API

  Make the pixdesc.h API public.

2009-10-27 - r20385 - lavfi 1.5.0 - AVFilter.next

  Add a next field to AVFilter, this is used for simplifying the

  registration and management of the registered filters.

2009-10-23 - r20356 - lavfi 1.4.1 - AVFilter.description

  Add a description field to AVFilter.

2009-10-19 - r20302 - lavfi 1.3.0 - avfilter_make_format_list()

  Change the interface of avfilter_make_format_list() from

  avfilter_make_format_list(int n, ...) to

  avfilter_make_format_list(enum PixelFormat *pix_fmts).

2009-10-18 - r20272 - lavfi 1.0.0 - avfilter_get_video_buffer()

  Make avfilter_get_video_buffer() recursive and add the w and h

  parameters to it.

2009-10-07 - r20189 - lavfi 0.5.1 - AVFilterPic

  Add w and h fields to AVFilterPic.

2009-06-22 - r19250 - lavf 52.34.1 - AVFormatContext.packet_size

  This is now an unsigned int instead of a signed int.

2009-06-19 - r19222 - lavc 52.32.0 - AVSubtitle.pts

  Add a pts field to AVSubtitle which gives the subtitle packet pts

  in AV_TIME_BASE. Some subtitle de-/encoders (e.g. XSUB) will

  not work right without this.

2009-06-03 - r19078 - lavc 52.30.2 - AV_PKT_FLAG_KEY

  PKT_FLAG_KEY has been deprecated and will be dropped at the next

  major version. Use AV_PKT_FLAG_KEY instead.

2009-06-01 - r19025 - lavc 52.30.0 - av_lockmgr_register()

  av_lockmgr_register() can be used to register a callback function

  that lavc (and in the future, libraries that depend on lavc) can use

  to implement mutexes. The application should provide a callback function

  that implements the AV_LOCK_* operations described in avcodec.h.

  When the lock manager is registered, FFmpeg is guaranteed to behave

  correctly in a multi-threaded application.

2009-04-30 - r18719 - lavc 52.28.0 - av_free_packet()

  av_free_packet() is no longer an inline function. It is now exported.

2009-04-11 - r18431 - lavc 52.25.0 - deprecate av_destruct_packet_nofree()

  Please use NULL instead. This has been supported since r16506

  (lavf > 52.23.1, lavc > 52.10.0).

2009-04-07 - r18351 - lavc 52.23.0 - avcodec_decode_video/audio/subtitle

  The old decoding functions are deprecated, all new code should use the

  new functions avcodec_decode_video2(), avcodec_decode_audio3() and

  avcodec_decode_subtitle2(). These new functions take an AVPacket *pkt

  argument instead of a const uint8_t *buf / int buf_size pair.

2009-04-03 - r18321 - lavu 50.3.0 - av_fifo_space()

  Introduce the av_fifo_space() function.

2009-04-02 - r18317 - lavc 52.23.0 - AVPacket

  Move AVPacket declaration from libavformat/avformat.h to

  libavcodec/avcodec.h.

2009-03-22 - r18163 - lavu 50.2.0 - RGB32 pixel formats

  Convert the pixel formats PIX_FMT_ARGB, PIX_FMT_RGBA, PIX_FMT_ABGR,

  PIX_FMT_BGRA, which were defined as macros, into enum PixelFormat values.

  Conversely PIX_FMT_RGB32, PIX_FMT_RGB32_1, PIX_FMT_BGR32 and

  PIX_FMT_BGR32_1 are now macros.

  avcodec_get_pix_fmt() now recognizes the "rgb32" and "bgr32" aliases.

  Re-sort the enum PixelFormat list accordingly.

  This change breaks API/ABI backward compatibility.

2009-03-22 - r18133 - lavu 50.1.0 - PIX_FMT_RGB5X5 endian variants

  Add the enum PixelFormat values:

  PIX_FMT_RGB565BE, PIX_FMT_RGB565LE, PIX_FMT_RGB555BE, PIX_FMT_RGB555LE,

  PIX_FMT_BGR565BE, PIX_FMT_BGR565LE, PIX_FMT_BGR555BE, PIX_FMT_BGR555LE.

2009-03-21 - r18116 - lavu 50.0.0  - av_random*

  The Mersenne Twister PRNG implemented through the av_random* functions

  was removed. Use the lagged Fibonacci PRNG through the av_lfg* functions

  instead.

2009-03-08 - r17869 - lavu 50.0.0  - AVFifoBuffer

  av_fifo_init, av_fifo_read, av_fifo_write and av_fifo_realloc were dropped

  and replaced by av_fifo_alloc, av_fifo_generic_read, av_fifo_generic_write

  and av_fifo_realloc2.

  In addition, the order of the function arguments of av_fifo_generic_read

  was changed to match av_fifo_generic_write.

  The AVFifoBuffer/struct AVFifoBuffer may only be used in an opaque way by

  applications, they may not use sizeof() or directly access members.

2009-03-01 - r17682 - lavf 52.31.0 - Generic metadata API

  Introduce a new metadata API (see av_metadata_get() and friends).

  The old API is now deprecated and should not be used anymore. This especially

  includes the following structure fields:

    - AVFormatContext.title

    - AVFormatContext.author

    - AVFormatContext.copyright

    - AVFormatContext.comment

    - AVFormatContext.album

    - AVFormatContext.year

    - AVFormatContext.track

    - AVFormatContext.genre

    - AVStream.language

    - AVStream.filename

    - AVProgram.provider_name

    - AVProgram.name

    - AVChapter.title