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# AVFragmentedMovieTrackTotalSampleDataLengthDidChangeNotification

```
extern NSString * const AVFragmentedMovieTrackTotalSampleDataLengthDidChangeNotification;
```

## Discussion

\discussion This notification name has been deprecated. Use either AVFragmentedMovieTrackTimeRangeDidChangeNotification or AVFragmentedMovieTrackSegmentsDidChangeNotification instead; in either case, you can assume that timing changes to fragmented tracks result in changes to the total length of the sample data used by the track.

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