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# CMTaggedBufferGroupGetCMSampleBufferForTagCollection

Gets the single sample buffer in a group which contains a given tag collection, if present.

```
extern CMSampleBufferRefCMTaggedBufferGroupGetCMSampleBufferForTagCollection(CMTaggedBufferGroupRef group, CMTagCollectionRef tagCollection, CFIndex *indexOut);
```

## Parameters

`group`

The tagged buffer group to inspect.

`tagCollection`

The tag collection to match in the buffer group.

`indexOut`

A pointer to the index of the retrieved sample buffer. The value of indexOut is `NULL` when the function returns `NULL`.

## Return Value

Returns the unique sample buffer associated with `tagCollection`, or `NULL` if there were multiple sample buffers or no sample buffer could be found.

---

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