DASH specific stream descriptor fields

dash_accessibilities (accessibilities)

Optional semicolon separated list of values for DASH Accessibility element. The value should be in the format: scheme_id_uri=value, which propagates to the Accessibility element in the result DASH manifest. See DASH (ISO/IEC 23009-1) specification for details.

dash_roles (roles)

Optional semicolon separated list of values for DASH Role element. The value should be one of: caption, subtitle, main, alternate, supplementary, commentary and dub. See DASH (ISO/IEC 23009-1) specification for details.