---
title: numberOfBytesTransferred
framework: mediaplayer
role: symbol
role_heading: Instance Property
path: mediaplayer/mpmovieaccesslogevent/numberofbytestransferred
---

# numberOfBytesTransferred

The accumulated number of bytes transferred.

## Declaration

```swift
var numberOfBytesTransferred: Int64 { get }
```

## Discussion

Discussion If the number of bytes transferred is unknown, this property’s value is negative.

## See Also

### Movie access log event properties

- [numberOfSegmentsDownloaded](mediaplayer/mpmovieaccesslogevent/numberofsegmentsdownloaded.md)
- [playbackStartDate](mediaplayer/mpmovieaccesslogevent/playbackstartdate.md)
- [uri](mediaplayer/mpmovieaccesslogevent/uri.md)
- [serverAddress](mediaplayer/mpmovieaccesslogevent/serveraddress.md)
- [numberOfServerAddressChanges](mediaplayer/mpmovieaccesslogevent/numberofserveraddresschanges.md)
- [playbackSessionID](mediaplayer/mpmovieaccesslogevent/playbacksessionid.md)
- [playbackStartOffset](mediaplayer/mpmovieaccesslogevent/playbackstartoffset.md)
- [segmentsDownloadedDuration](mediaplayer/mpmovieaccesslogevent/segmentsdownloadedduration.md)
- [durationWatched](mediaplayer/mpmovieaccesslogevent/durationwatched.md)
- [numberOfStalls](mediaplayer/mpmovieaccesslogevent/numberofstalls.md)
- [observedBitrate](mediaplayer/mpmovieaccesslogevent/observedbitrate.md)
- [indicatedBitrate](mediaplayer/mpmovieaccesslogevent/indicatedbitrate.md)
- [numberOfDroppedVideoFrames](mediaplayer/mpmovieaccesslogevent/numberofdroppedvideoframes.md)