[5.1.0] - 2026-01-16

Added

• Added feature v1_21.
• Updated embedded source code of libheif to version 1.21.1.
• Added support of libheif 1.21:
  • added new values into heif_suberror_code "enum':
    • heif_suberror_code_heif_suberror_Unsupported_track_type
  • added new values into heif_item_property_type "enum':
    • heif_item_property_type_heif_item_property_type_extended_language
  • added new values into heif_track_type_4cc "enum':
    • heif_track_type_4cc_heif_track_type_auxiliary
  • added enums:
    • heif_auxiliary_track_info_type
    • heif_sequence_gop_structure
  • struct heif_security_limits was updated to version 3,
    added new fields:
    • max_sequence_frames
    • max_number_of_file_brands
  • struct heif_decoding_options was updated to version 8,
    added new fields:
    • ignore_sequence_editlist
    • output_image_nclx_profile
    • num_library_threads
    • num_codec_threads
  • struct heif_sequence_encoding_options was updated to version 2,
    added new fields:
    • gop_structure
    • keyframe_distance_min
    • keyframe_distance_max
    • save_alpha_channel
  • added functions:
    • heif_context_set_number_of_sequence_repetitions
    • heif_image_handle_get_gimi_content_id
    • heif_image_handle_set_content_light_level
    • heif_image_handle_set_mastering_display_colour_volume
    • heif_image_handle_set_pixel_aspect_ratio
    • heif_item_get_property_extended_language
    • heif_item_set_property_extended_language
    • heif_metadata_compression_method_supported
    • heif_track_encode_end_of_sequence
    • heif_track_get_auxiliary_info_data
    • heif_track_get_auxiliary_info_type_urn
    • heif_track_get_auxiliary_info_type
    • heif_track_has_alpha_channel