GetID

Function retrieve text ID of Mediainfo field by index with given parameters.

GetID(FieldIndex [, Context, Stream])

FieldIndex	Field index.
Context	Context (General, Video, etc.). If omitted, General context will be used.
Stream	Stream number. If omitted, stream 0 will be used. Total count of strams can be retrieved with GetCount function.

Function return string with field's text ID.