====== GetID ======

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

<code pcmi>
GetID(FieldIndex [, Context, Stream])
</code>

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|**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 [[script_getcount]] function.|

Function return string with field's text ID.