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FFmpeg
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Simple key:value store. More...
Data Structures | |
| struct | AVDictionaryEntry |
Macros | |
| #define | AV_DICT_MATCH_CASE 1 |
| Only get an entry with exact-case key match. More... | |
| #define | AV_DICT_IGNORE_SUFFIX 2 |
| Return first entry in a dictionary whose first part corresponds to the search key, ignoring the suffix of the found key string. More... | |
| #define | AV_DICT_DONT_STRDUP_KEY 4 |
| Take ownership of a key that's been allocated with av_malloc() or another memory allocation function. More... | |
| #define | AV_DICT_DONT_STRDUP_VAL 8 |
| Take ownership of a value that's been allocated with av_malloc() or another memory allocation function. More... | |
| #define | AV_DICT_DONT_OVERWRITE 16 |
| Don't overwrite existing entries. More... | |
| #define | AV_DICT_APPEND 32 |
| If the entry already exists, append to it. More... | |
| #define | AV_DICT_MULTIKEY 64 |
| Allow to store several equal keys in the dictionary. More... | |
Functions | |
| AVDictionaryEntry * | av_dict_get (const AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags) |
| Get a dictionary entry with matching key. More... | |
| int | av_dict_count (const AVDictionary *m) |
| Get number of entries in dictionary. More... | |
| int | av_dict_set (AVDictionary **pm, const char *key, const char *value, int flags) |
| Set the given entry in *pm, overwriting an existing entry. More... | |
| int | av_dict_set_int (AVDictionary **pm, const char *key, int64_t value, int flags) |
| Convenience wrapper for av_dict_set that converts the value to a string and stores it. More... | |
| int | av_dict_parse_string (AVDictionary **pm, const char *str, const char *key_val_sep, const char *pairs_sep, int flags) |
| Parse the key/value pairs list and add the parsed entries to a dictionary. More... | |
| int | av_dict_copy (AVDictionary **dst, const AVDictionary *src, int flags) |
| Copy entries from one AVDictionary struct into another. More... | |
| void | av_dict_free (AVDictionary **m) |
| Free all the memory allocated for an AVDictionary struct and all keys and values. More... | |
| int | av_dict_get_string (const AVDictionary *m, char **buffer, const char key_val_sep, const char pairs_sep) |
| Get dictionary entries as a string. More... | |
Simple key:value store.
Dictionaries are used for storing key:value pairs. To create an AVDictionary, simply pass an address of a NULL pointer to av_dict_set(). NULL can be used as an empty dictionary wherever a pointer to an AVDictionary is required. Use av_dict_get() to retrieve an entry or iterate over all entries and finally av_dict_free() to free the dictionary and all its contents.
| #define AV_DICT_MATCH_CASE 1 |
Only get an entry with exact-case key match.
Only relevant in av_dict_get().
| #define AV_DICT_IGNORE_SUFFIX 2 |
Return first entry in a dictionary whose first part corresponds to the search key, ignoring the suffix of the found key string.
Only relevant in av_dict_get().
| #define AV_DICT_DONT_STRDUP_KEY 4 |
Take ownership of a key that's been allocated with av_malloc() or another memory allocation function.
| #define AV_DICT_DONT_STRDUP_VAL 8 |
Take ownership of a value that's been allocated with av_malloc() or another memory allocation function.
| #define AV_DICT_DONT_OVERWRITE 16 |
| #define AV_DICT_APPEND 32 |
| #define AV_DICT_MULTIKEY 64 |
| AVDictionaryEntry* av_dict_get | ( | const AVDictionary * | m, |
| const char * | key, | ||
| const AVDictionaryEntry * | prev, | ||
| int | flags | ||
| ) |
Get a dictionary entry with matching key.
The returned entry key or value must not be changed, or it will cause undefined behavior.
To iterate through all the dictionary entries, you can set the matching key to the null string "" and set the AV_DICT_IGNORE_SUFFIX flag.
| prev | Set to the previous matching element to find the next. If set to NULL the first matching element is returned. |
| key | matching key |
| flags | a collection of AV_DICT_* flags controlling how the entry is retrieved |
Definition at line 40 of file dict.c.
Referenced by adts_aac_read_header(), aom_init(), asf_write_header1(), asf_write_markers(), assert_avoptions(), av_dict_copy(), av_dict_get_string(), av_dict_set(), av_dump_format(), av_opt_is_set_to_default(), av_opt_set_dict2(), av_packet_pack_dictionary(), avfilter_init_str(), avi_read_header(), avi_write_header(), bitstream_switching(), caf_write_header(), check_extensions(), check_validation_layers(), choose_pix_fmts(), config_props(), configure_filtergraph(), configure_output_video_filter(), cookie_string(), create_filter(), cuda_flags_from_opts(), d3d11va_device_create(), dict_copy_entry(), dump_attachment(), dump_metadata(), dump_stream_format(), dv_write_header(), export_orphan_timecode(), ff_ape_write_tag(), ff_decklink_read_packet(), ff_id3v2_write_apic(), ff_metadata_conv(), ff_mjpeg_receive_frame(), ff_parse_creation_time_metadata(), ff_replaygain_export(), ff_riff_write_info(), ff_vorbiscomment_length(), ff_vorbiscomment_write(), ffurl_connect(), ffurl_open_whitelist(), fifo_thread_write_header(), filter_codec_opts(), filter_frame(), find_compressor(), flac_init(), flac_read_header(), flac_write_picture(), flv_read_packet(), func_metadata(), get_concatdec_select(), get_cookies(), get_date_tag(), get_duration(), get_metadata_duration(), get_metadata_lang(), get_mimetype(), gxf_write_header(), id3_has_changed_values(), id3v1_create_tag(), id3v1_set_string(), id3v2_3_metadata_split_date(), init(), init_input_stream(), init_muxer(), init_output_stream(), libkvazaar_init(), librav1e_encode_init(), libx265_encode_init(), lrc_write_header(), main(), match_stream_specifier(), mkv_check_tag(), mkv_write_attachments(), mkv_write_chapters(), mkv_write_header(), mkv_write_stereo_mode(), mkv_write_tag(), mkv_write_track(), mov_create_chapter_track(), mov_init(), mov_parse_stsd_audio(), mov_read_header(), mov_write_3gp_udta_tag(), mov_write_chpl_tag(), mov_write_hdlr_tag(), mov_write_header(), mov_write_int8_metadata(), mov_write_isml_manifest(), mov_write_mdta_ilst_tag(), mov_write_mdta_keys_tag(), mov_write_raw_metadata_tag(), mov_write_tmcd_tag(), mov_write_tmpo_tag(), mov_write_track_metadata(), mov_write_trkn_tag(), mov_write_uuidusmt_tag(), mp3_write_xing(), mpc_read_header(), mpegts_add_service(), mpegts_init(), mpegts_write_pmt(), mxf_init(), mxf_init_timecode(), mxf_write_header_metadata_sets(), mxf_write_identification(), mxf_write_user_comments(), ogg_build_vp8_headers(), open_input_file(), open_output_file(), open_slave(), opencl_filter_device(), opencl_filter_platform(), parse_cookie(), print_dict(), put_meta(), qsv_device_create(), read_thread(), receiver_thread(), remove_avoptions(), riff_has_valid_tags(), rv10_write_header(), sap_write_header(), segment_end(), set_encoder_id(), show_frame(), show_tags(), smjpeg_write_header(), sox_write_header(), stream_component_open(), strip_specifiers(), subsegment_alignment(), ttml_write_header(), vaapi_device_create(), vorbis_parse_single_comment(), vpx_encode(), vpx_init(), vulkan_device_create_internal(), write_adaptation_set(), write_chapter(), write_globalinfo(), write_manifest(), write_metadata(), write_representation(), write_streaminfo(), write_table_entries_attrib(), write_table_redirector_legacy_attrib(), write_tags(), writer_open(), writer_print_integer(), writer_print_string(), wv_read_header(), X264_init(), and xavs2_init().
| int av_dict_count | ( | const AVDictionary * | m | ) |
Get number of entries in dictionary.
| m | dictionary |
Definition at line 35 of file dict.c.
Referenced by asf_write_header1(), av_dict_get_string(), caf_write_header(), dump_metadata(), ff_vorbiscomment_write(), hls_mux_init(), init(), mp3_read_header(), and seg_init().
| int av_dict_set | ( | AVDictionary ** | pm, |
| const char * | key, | ||
| const char * | value, | ||
| int | flags | ||
| ) |
Set the given entry in *pm, overwriting an existing entry.
Note: If AV_DICT_DONT_STRDUP_KEY or AV_DICT_DONT_STRDUP_VAL is set, these arguments will be freed on error.
Warning: Adding a new entry to a dictionary invalidates all existing entries previously returned with av_dict_get.
| pm | pointer to a pointer to a dictionary struct. If *pm is NULL a dictionary struct is allocated and put in *pm. |
| key | entry key to add to *pm (will either be av_strduped or added as a new key depending on flags) |
| value | entry value to add to *pm (will be av_strduped or added as a new key depending on flags). Passing a NULL value will cause an existing entry to be deleted. |
Definition at line 70 of file dict.c.
Referenced by aa_read_header(), add_filename_as_pkt_side_data(), add_meta(), add_metadata(), add_metadata_from_renditions(), add_timecode_metadata(), amf_parse_object(), ape_tag_read_field(), asf_read_header(), asf_read_metadata(), asf_read_picture(), asf_read_properties(), asf_read_value(), asf_set_metadata(), asf_write_header1(), av_dict_copy(), av_dict_set_fxp(), av_dict_set_int(), av_opt_set_dict2(), av_packet_unpack_dictionary(), avformat_find_stream_info(), avi_metadata_creation_time(), avi_read_nikon(), avi_read_tag(), avpriv_dict_set_timestamp(), avpriv_new_chapter(), bprint_to_avdict(), chunk_end(), cine_read_header(), concat_parse_script(), config_input(), config_props(), dash_init(), dash_read_header(), dashenc_delete_file(), decode_frame(), decode_frame_common(), decode_header(), decode_info_header(), decode_text_chunk(), dict_copy_entry(), dict_set_if_not_null(), dss_read_metadata_date(), dss_read_metadata_string(), dtshd_read_header(), dv_read_timecode(), export_orphan_timecode(), ff_flac_parse_picture(), ff_id3v2_parse_apic(), ff_id3v2_parse_priv_dict(), ff_load_image(), ff_metadata_conv(), ff_parse_mpeg2_descriptor(), ff_read_riff_info(), ff_rm_read_mdpr_codecdata(), ff_rtp_chain_mux_open(), ff_sauce_read(), ff_tadd_string_metadata(), ff_tee_parse_slave_options(), ff_wms_parse_sdp_a_line(), ffio_copy_url_options(), ffurl_connect(), ffurl_open_whitelist(), filter(), filter_codec_opts(), filter_frame(), filter_frame16(), filter_frame8(), flac_init(), flac_read_header(), get_attachment(), get_meta(), get_metadata(), get_string(), get_tag(), gif_read_header(), h264_export_frame_props(), hls_delete_file(), hls_mux_init(), hls_read_header(), hls_start(), hls_write_packet(), hls_write_trailer(), http_open_cnx_internal(), icecast_open(), id3v2_3_metadata_split_date(), iff_read_header(), init_filter_graph(), init_input_stream(), init_muxer(), init_output_stream(), ism_seek(), ism_write_header(), lavfi_read_header(), lrc_read_header(), lrc_write_header(), main(), map_to_opts(), merge_date(), modplug_load_metadata(), mov_metadata_gnre(), mov_metadata_loci(), mov_metadata_track_or_disc_number(), mov_parse_stsd_audio(), mov_parse_stsd_data(), mov_parse_stsd_video(), mov_read_custom(), mov_read_ftyp(), mov_read_hdlr(), mov_read_header(), mov_read_mdhd(), mov_read_rtmd_track(), mov_read_udta_string(), mov_read_uuid(), move_metadata(), mp3_parse_info_tag(), mpeg_decode_frame(), mxf_add_metadata_stream(), mxf_add_timecode_metadata(), mxf_add_umid_metadata(), mxf_parse_package_comments(), mxf_parse_physical_source_package(), mxf_parse_structural_metadata(), mxf_read_partition_pack(), new_output_stream(), new_video_stream(), nist_read_header(), nsp_read_header(), nsv_parse_NSVf_header(), offset_fn(), ogm_chapter(), open_codec_context(), open_input(), open_input_file(), open_output_file(), open_slave(), open_url(), opencl_device_derive(), opt_bitrate(), opt_default(), opt_profile(), opt_show_entries(), opt_timecode(), output_frame(), parse_chunks(), parse_cookie(), parse_dsd_prop(), parse_icy(), parse_key_value_pair(), parse_playlist(), parse_programinformation(), parse_set_cookie(), parse_tag(), parse_timecode_in_framenum_format(), process_options(), qsv_device_create(), r3d_read_red1(), read_comment(), read_gab2_sub(), read_header(), read_info_chunk(), read_string(), read_tag(), read_thread(), read_ttag(), read_uslt(), remove_avoptions(), rm_read_metadata(), rpl_read_header(), rtmp_open(), run_test(), sap_write_header(), scan_file(), sdt_cb(), seg_init(), segment_end(), segment_start(), select_frame(), sender_thread(), set_colorquant_ratio_meta(), set_encoder_id(), set_http_options(), set_language(), set_meta(), set_metadata_float(), set_side_data(), smjpeg_read_header(), sox_read_header(), stream_component_open(), strip_specifiers(), subviewer_read_header(), try_decode_frame(), update_metadata(), var_read_metadata(), decklink_input_callback::VideoInputFrameArrived(), vivo_read_header(), vorbis_parse_single_comment(), wc3_read_header(), webm_chunk_init(), and wsd_read_header().
| int av_dict_set_int | ( | AVDictionary ** | pm, |
| const char * | key, | ||
| int64_t | value, | ||
| int | flags | ||
| ) |
Convenience wrapper for av_dict_set that converts the value to a string and stores it.
Note: If AV_DICT_DONT_STRDUP_KEY is set, key will be freed on error.
Definition at line 147 of file dict.c.
Referenced by add_stream_to_programs(), dash_init(), dash_read_header(), filter_frame(), ftp_connect_control_connection(), ftp_connect_data_connection(), hls_read_header(), http_listen(), ism_write_header(), LLVMFuzzerTestOneInput(), main(), map_to_opts(), mov_metadata_int8_bypass_padding(), mov_metadata_int8_no_padding(), mov_read_ftyp(), mxf_parse_structural_metadata(), open_file(), open_input(), open_input_file(), open_output_file(), parse_tag(), prompeg_open(), read_header(), read_header_openmpt(), read_uint16(), read_uint32(), read_uint64(), read_uint8(), rtp_open(), rtsp_read_setup(), scd_read_track(), set_http_options(), set_metadata_int(), stream_component_open(), vqf_read_header(), and webm_chunk_init().
| int av_dict_parse_string | ( | AVDictionary ** | pm, |
| const char * | str, | ||
| const char * | key_val_sep, | ||
| const char * | pairs_sep, | ||
| int | flags | ||
| ) |
Parse the key/value pairs list and add the parsed entries to a dictionary.
In case of failure, all the successfully set entries are stored in *pm. You may need to manually free the created dictionary.
| key_val_sep | a 0-terminated list of characters used to separate key from value |
| pairs_sep | a 0-terminated list of characters used to separate two pairs from each other |
| flags | flags to use when adding to dictionary. AV_DICT_DONT_STRDUP_KEY and AV_DICT_DONT_STRDUP_VAL are ignored since the key/value tokens will always be duplicated. |
Definition at line 180 of file dict.c.
Referenced by av_opt_is_set_to_default(), concat_parse_script(), hw_device_init_from_string(), init(), libkvazaar_init(), main(), parse_slave_fifo_options(), rtp_open(), run_test(), set_string_dict(), test_separators(), and writer_open().
| int av_dict_copy | ( | AVDictionary ** | dst, |
| const AVDictionary * | src, | ||
| int | flags | ||
| ) |
Copy entries from one AVDictionary struct into another.
| dst | pointer to a pointer to a AVDictionary struct. If *dst is NULL, this function will allocate a struct for you and put it in *dst |
| src | pointer to source AVDictionary struct |
| flags | flags to use when setting entries in *dst |
Definition at line 217 of file dict.c.
Referenced by asf_read_header(), av_opt_copy(), av_opt_get_dict_val(), av_opt_set_dict_val(), avformat_open_input(), copy_chapters(), copy_metadata(), copy_stream_props(), dash_init(), ff_id3v2_parse_chapters(), ff_mjpeg_receive_frame(), ff_stream_encode_params_copy(), ff_wms_parse_sdp_a_line(), fifo_mux_init(), fifo_thread_write_header(), frame_copy_props(), handle_id3(), hls_mux_init(), hls_read_header(), hls_read_packet(), http_open(), http_open_cnx(), init_muxer(), list_devices_for_context(), mark_section_show_entries(), new_output_stream(), ogg_init(), open_audio(), open_file(), open_output_file(), open_slave(), open_track_resource_context(), open_url(), open_video(), opt_default_new(), opt_target(), parse_assetmap(), parse_manifest(), parse_playlist(), read_frame_internal(), rtp_mpegts_write_header(), seg_init(), segment_mux_init(), segment_start(), set_http_options(), tee_write_header(), test_separators(), webm_chunk_init(), webp_decode_frame(), and write_packet().
| void av_dict_free | ( | AVDictionary ** | m | ) |
Free all the memory allocated for an AVDictionary struct and all keys and values.
Definition at line 203 of file dict.c.
Referenced by add_filename_as_pkt_side_data(), asf_read_close(), av_frame_unref(), av_opt_copy(), av_opt_free(), av_opt_is_set_to_default(), av_opt_set_dict2(), av_opt_set_dict_val(), avfilter_init_str(), avformat_find_stream_info(), avformat_free_context(), avformat_open_input(), chunk_end(), clear_frame_metadata(), close_slave(), concat_read_close(), config_input(), config_props(), create_master_playlist(), dash_close(), dash_free(), dash_init(), dash_write_packet(), dashenc_delete_file(), decode_header(), do_encrypt(), ds_free(), ff_http_do_new_request2(), ff_load_image(), ff_metadata_conv(), ff_mjpeg_decode_end(), ff_mjpeg_receive_frame(), ff_rtp_chain_mux_open(), ff_stream_encode_params_copy(), ff_tee_parse_slave_options(), ff_wms_parse_sdp_a_line(), ffmpeg_cleanup(), ffprobe_cleanup(), fifo_thread_write_header(), filter_frame(), free_chapter(), free_playlist_list(), free_side_data(), free_stream(), ftp_connect_control_connection(), ftp_connect_data_connection(), get_cookies(), handle_id3(), hls_close(), hls_delete_file(), hls_encryption_start(), hls_init_file_resend(), hls_mux_init(), hls_read_header(), hls_start(), hls_window(), hls_write_packet(), hls_write_trailer(), http_close(), http_listen(), http_open(), http_read_header(), http_seek_internal(), hw_device_init_from_string(), icecast_open(), id3v2_3_metadata_split_date(), imf_close(), init(), init_filter_graph(), init_fps(), init_muxer(), ism_seek(), ism_write_header(), lavfi_read_header(), libkvazaar_init(), list_devices_for_context(), LLVMFuzzerTestOneInput(), main(), open_audio(), open_codec_context(), open_file(), open_input(), open_input_file(), open_output_file(), open_slave(), open_track_resource_context(), open_url(), open_video(), opencl_device_derive(), opt_default_new(), opt_show_entries(), parse_assetmap(), parse_cookie(), parse_manifest(), parse_playlist(), png_dec_end(), prompeg_open(), qsv_device_create(), read_frame_internal(), read_thread(), reopen_demux_for_component(), rtmp_open(), rtp_mpegts_write_header(), rtp_open(), rtsp_read_setup(), run_test(), seg_init(), segment_start(), set_string_dict(), show_packet(), stream_component_open(), tee_open(), test_separators(), transcode(), try_decode_frame(), uninit(), uninit_opts(), uninit_parse_context(), decklink_input_callback::VideoInputFrameArrived(), vorbis_update_metadata(), webm_chunk_init(), webp_decode_frame(), write_hls_media_playlist(), write_manifest(), write_packet(), and writer_open().
| int av_dict_get_string | ( | const AVDictionary * | m, |
| char ** | buffer, | ||
| const char | key_val_sep, | ||
| const char | pairs_sep | ||
| ) |
Get dictionary entries as a string.
Create a string containing dictionary's entries. Such string may be passed back to av_dict_parse_string().
| [in] | m | dictionary |
| [out] | buffer | Pointer to buffer that will be allocated with string containg entries. Buffer must be freed by the caller when is no longer needed. |
| [in] | key_val_sep | character used to separate key from value |
| [in] | pairs_sep | character used to separate two pairs from each other |
Definition at line 230 of file dict.c.
Referenced by av_opt_get(), main(), open_slave(), and test_separators().
1.8.17