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# CMTagGetSInt64Value

Retrieves a tag’s value as a signed 64-bit integer.

```
extern int64_t CMTagGetSInt64Value(CMTag tag);
```

## Parameters

`tag`

The tag to get the value from.

## Discussion

> Note:
> Before retrieving a tag’s value with this function, call ``doc://com.apple.coremedia/documentation/CoreMedia/CMTagHasSInt64Value`` to ensure it has the correct type.

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