ISO-639 lang mappings

GstTag.prototype.tag_check_language_code

function GstTag.prototype.tag_check_language_code(lang_code: String): {
    // javascript wrapper for 'gst_tag_check_language_code'
}

Check if a given string contains a known ISO 639 language code.

This is useful in situations where it's not clear whether a given string is a language code (which should be put into a Gst.TAG_LANGUAGE_CODE tag) or a free-form language name descriptor (which should be put into a Gst.TAG_LANGUAGE_NAME tag instead).

GstTag.prototype.tag_get_language_code_iso_639_1

function GstTag.prototype.tag_get_language_code_iso_639_1(lang_code: String): {
    // javascript wrapper for 'gst_tag_get_language_code_iso_639_1'
}

Returns two-letter ISO-639-1 language code given a three-letter ISO-639-2 language code or two-letter ISO-639-1 language code (both are accepted for convenience).

Language codes are case-sensitive and expected to be lower case.

GstTag.prototype.tag_get_language_code_iso_639_2B

function GstTag.prototype.tag_get_language_code_iso_639_2B(lang_code: String): {
    // javascript wrapper for 'gst_tag_get_language_code_iso_639_2B'
}

Returns three-letter ISO-639-2 "bibliographic" language code given a two-letter ISO-639-1 language code or a three-letter ISO-639-2 language code (both are accepted for convenience).

The "bibliographic" code is derived from the English name of the language (e.g. "ger" for German instead of "de" or "deu"). In most scenarios, the "terminological" codes are preferred.

Language codes are case-sensitive and expected to be lower case.

GstTag.prototype.tag_get_language_code_iso_639_2T

function GstTag.prototype.tag_get_language_code_iso_639_2T(lang_code: String): {
    // javascript wrapper for 'gst_tag_get_language_code_iso_639_2T'
}

Returns three-letter ISO-639-2 "terminological" language code given a two-letter ISO-639-1 language code or a three-letter ISO-639-2 language code (both are accepted for convenience).

The "terminological" code is derived from the local name of the language (e.g. "deu" for German instead of "ger"). In most scenarios, the "terminological" codes are preferred over the "bibliographic" ones.

Language codes are case-sensitive and expected to be lower case.

GstTag.prototype.tag_get_language_codes

function GstTag.prototype.tag_get_language_codes(): {
    // javascript wrapper for 'gst_tag_get_language_codes'
}

Returns a list of known language codes (in form of two-letter ISO-639-1 codes). This is useful for UIs to build a list of available languages for tagging purposes (e.g. to tag an audio track appropriately in a video or audio editor).

GstTag.prototype.tag_get_language_name

function GstTag.prototype.tag_get_language_name(language_code: String): {
    // javascript wrapper for 'gst_tag_get_language_name'
}

Returns the name of the language given an ISO-639 language code as found in a GST_TAG_LANGUAGE_CODE tag. The name will be translated according to the current locale (if the library was built against the iso-codes package, otherwise the English name will be returned).

Language codes are case-sensitive and expected to be lower case.