AVPlayerItemAccessLogEventMBS.downloadOverdue as Integer

Type	Topic	Plugin	Version	macOS	Windows	Linux	iOS	Targets
property	AVFoundation	MBS AVFoundation Plugin	14.0	✅ Yes	❌ No	❌ No	✅ Yes	All

The total number of times the download of the segments took too long. (read-only)

The value of the property is negative if unknown.
This property corresponds to "c-overdue".
This property is not compatible with key-value observing.
Available in OS X v10.9 and later.
(Read only property)

AVPlayerItemAccessLogEventMBS.durationWatched as Double

Type	Topic	Plugin	Version	macOS	Windows	Linux	iOS	Targets
property	AVFoundation	MBS AVFoundation Plugin	13.2	✅ Yes	❌ No	❌ No	✅ Yes	All

The accumulated duration of the media played, in seconds. (read-only)

The value of this property is negative if unknown.
(Read only property)

AVPlayerItemAccessLogEventMBS.Handle as Integer

Type	Topic	Plugin	Version	macOS	Windows	Linux	iOS	Targets
property	AVFoundation	MBS AVFoundation Plugin	13.2	✅ Yes	❌ No	❌ No	✅ Yes	All

The internal object reference.

(Read and Write property)

AVPlayerItemAccessLogEventMBS.indicatedBitrate as Double

Type	Topic	Plugin	Version	macOS	Windows	Linux	iOS	Targets
property	AVFoundation	MBS AVFoundation Plugin	13.2	✅ Yes	❌ No	❌ No	✅ Yes	All

The throughput required to play the stream, as advertised by the server, in bits per second. (read-only)

The value of this property is negative if unknown.
(Read only property)

AVPlayerItemAccessLogEventMBS.mediaRequestsWWAN as Integer

Type	Topic	Plugin	Version	macOS	Windows	Linux	iOS	Targets
property	AVFoundation	MBS AVFoundation Plugin	14.0	✅ Yes	❌ No	❌ No	✅ Yes	All

Number of network read requests over WWAN. (read-only)

The value of the property is negative if unknown.
Corresponds to "sc-wwan-count".
This property is not compatible with key-value observing.
Available in OS X v10.9 and later.
(Read only property)

AVPlayerItemAccessLogEventMBS.numberOfBytesTransferred as Int64

Type	Topic	Plugin	Version	macOS	Windows	Linux	iOS	Targets
property	AVFoundation	MBS AVFoundation Plugin	13.2	✅ Yes	❌ No	❌ No	✅ Yes	All

The accumulated number of bytes transferred by the item. (read-only)

The value of this property is negative if unknown.
(Read only property)

AVPlayerItemAccessLogEventMBS.numberOfDroppedVideoFrames as Integer

Type	Topic	Plugin	Version	macOS	Windows	Linux	iOS	Targets
property	AVFoundation	MBS AVFoundation Plugin	13.2	✅ Yes	❌ No	❌ No	✅ Yes	All

The total number of dropped video frames (read-only)

The value of this property is negative if unknown.
(Read only property)

AVPlayerItemAccessLogEventMBS.numberOfMediaRequests as Integer

Type	Topic	Plugin	Version	macOS	Windows	Linux	iOS	Targets
property	AVFoundation	MBS AVFoundation Plugin	14.0	✅ Yes	❌ No	❌ No	✅ Yes	All

A count of media read requests from the server to this client. (read-only)

For HTTP live streaming, this property contains the count of media requests downloaded from the server. For progressive-style HTTP media downloads, it contains a count of HTTP GET (byte-range) requests for the resource.
The value of this property is negative if unknown.
Available in OS X v10.9 and later.#
(Read only property)

AVPlayerItemAccessLogEventMBS.numberOfSegmentsDownloaded as Integer

Type	Topic	Plugin	Version	macOS	Windows	Linux	iOS	Targets
property	AVFoundation	MBS AVFoundation Plugin	13.2	✅ Yes	❌ No	❌ No	✅ Yes	All

A count of the media segments downloaded from the server to this client. (read-only)

The value of this property is negative if unknown.
(Read only property)

AVPlayerItemAccessLogEventMBS.numberOfServerAddressChanges as Integer

Type	Topic	Plugin	Version	macOS	Windows	Linux	iOS	Targets
property	AVFoundation	MBS AVFoundation Plugin	13.2	✅ Yes	❌ No	❌ No	✅ Yes	All

A count of changes to the server address over the last uninterrupted period of playback. (read-only)

The value of this property is negative if unknown.
(Read only property)

AVPlayerItemAccessLogEventMBS.numberOfStalls as Integer

Type	Topic	Plugin	Version	macOS	Windows	Linux	iOS	Targets
property	AVFoundation	MBS AVFoundation Plugin	13.2	✅ Yes	❌ No	❌ No	✅ Yes	All

The total number of playback stalls encountered. (read-only)

The value of this property is negative if unknown.
(Read only property)

AVPlayerItemAccessLogEventMBS.observedBitrate as Double

Type	Topic	Plugin	Version	macOS	Windows	Linux	iOS	Targets
property	AVFoundation	MBS AVFoundation Plugin	13.2	✅ Yes	❌ No	❌ No	✅ Yes	All

The empirical throughput across all media downloaded, in bits per second. (read-only)

The value of this property is negative if unknown.
(Read only property)

AVPlayerItemAccessLogEventMBS.observedBitrateStandardDeviation as Double

Type	Topic	Plugin	Version	macOS	Windows	Linux	iOS	Targets
property	AVFoundation	MBS AVFoundation Plugin	14.0	✅ Yes	❌ No	❌ No	✅ Yes	All

Standard deviation of observed segment download bit rates. (read-only)

The value of the property is negative if unknown.
Available in OS X v10.9 and later.
(Read only property)

AVPlayerItemAccessLogEventMBS.observedMaxBitrate as Double

Type	Topic	Plugin	Version	macOS	Windows	Linux	iOS	Targets
property	AVFoundation	MBS AVFoundation Plugin	14.0	✅ Yes	❌ No	❌ No	✅ Yes	All

Maximum observed segment download bit rate. (read-only)

The value of the property is negative if unknown.
Available in OS X v10.9 and later.#
(Read only property)

AVPlayerItemAccessLogEventMBS.observedMinBitrate as Double

Type	Topic	Plugin	Version	macOS	Windows	Linux	iOS	Targets
property	AVFoundation	MBS AVFoundation Plugin	14.0	✅ Yes	❌ No	❌ No	✅ Yes	All

Minimum observed segment download bit rate. (read-only)

The value of the property is negative if unknown.
Available in OS X v10.9 and later.
(Read only property)

AVPlayerItemAccessLogEventMBS.playbackSessionID as string

Type	Topic	Plugin	Version	macOS	Windows	Linux	iOS	Targets
property	AVFoundation	MBS AVFoundation Plugin	13.2	✅ Yes	❌ No	❌ No	✅ Yes	All

A GUID that identifies the playback session. (read-only)

This value is used in HTTP requests.
The value of this property is nil if unknown.
(Read only property)

AVPlayerItemAccessLogEventMBS.playbackStartDate as date

Type	Topic	Plugin	Version	macOS	Windows	Linux	iOS	Targets
property	AVFoundation	MBS AVFoundation Plugin	13.2	✅ Yes	❌ No	❌ No	❌ No	Desktop, Console & Web

The date and time at which playback began for this event. (read-only)

The value of this property is nil if unknown.
(Read only property)

AVPlayerItemAccessLogEventMBS.playbackStartDateTime as DateTime

Type	Topic	Plugin	Version	macOS	Windows	Linux	iOS	Targets
property	AVFoundation	MBS AVFoundation Plugin	20.5	✅ Yes	❌ No	❌ No	✅ Yes	All

The date and time at which playback began for this event. (read-only)

The value of this property is nil if unknown.
(Read only property)

AVPlayerItemAccessLogEventMBS.playbackStartOffset as Double

Type	Topic	Plugin	Version	macOS	Windows	Linux	iOS	Targets
property	AVFoundation	MBS AVFoundation Plugin	13.2	✅ Yes	❌ No	❌ No	✅ Yes	All

An offset into the playlist where the last uninterrupted period of playback began, in seconds (read-only)

The value of this property is negative if unknown.
(Read only property)

AVPlayerItemAccessLogEventMBS.playbackType as String

Type	Topic	Plugin	Version	macOS	Windows	Linux	iOS	Targets
property	AVFoundation	MBS AVFoundation Plugin	14.0	✅ Yes	❌ No	❌ No	✅ Yes	All

The playback type: live, VOD, or from a file. (read-only)

If nil is returned the playback type is unknown.
Available in OS X v10.9 and later.
(Read only property)

AVPlayerItemAccessLogEventMBS.segmentsDownloadedDuration as Double

Type	Topic	Plugin	Version	macOS	Windows	Linux	iOS	Targets
property	AVFoundation	MBS AVFoundation Plugin	13.2	✅ Yes	❌ No	❌ No	✅ Yes	All

The accumulated duration of the media downloaded, in seconds. (read-only)

The value of this property is negative if unknown.
(Read only property)

AVPlayerItemAccessLogEventMBS.serverAddress as string

Type	Topic	Plugin	Version	macOS	Windows	Linux	iOS	Targets
property	AVFoundation	MBS AVFoundation Plugin	13.2	✅ Yes	❌ No	❌ No	✅ Yes	All

The IP address of the server that was the source of the last delivered media segment. (read-only)

The value of this property is nil if unknown.
(Read only property)

AVPlayerItemAccessLogEventMBS.startupTime as Double

Type	Topic	Plugin	Version	macOS	Windows	Linux	iOS	Targets
property	AVFoundation	MBS AVFoundation Plugin	14.0	✅ Yes	❌ No	❌ No	✅ Yes	All

The accumulated duration, in seconds, until player item is ready to play. (read-only)

The value of the property is negative if unknown.
Available in OS X v10.9 and later.
(Read only property)

AVPlayerItemAccessLogEventMBS.switchBitrate as Double

Type	Topic	Plugin	Version	macOS	Windows	Linux	iOS	Targets
property	AVFoundation	MBS AVFoundation Plugin	14.0	✅ Yes	❌ No	❌ No	✅ Yes	All

Bandwidth that caused a switch (up or down). (read-only)

The value of the property is negative if unknown.
Available in OS X v10.9 and later.
(Read only property)

AVPlayerItemAccessLogEventMBS.transferDuration as Double

Type	Topic	Plugin	Version	macOS	Windows	Linux	iOS	Targets
property	AVFoundation	MBS AVFoundation Plugin	14.0	✅ Yes	❌ No	❌ No	✅ Yes	All

The accumulated duration, in seconds, of active network transfer of bytes. (read-only)

The value of the property is negative if unknown.
Corresponds to "c-transfer-duration".
This property is not compatible with key-value observing.
Available in OS X v10.9 and later.
(Read only property)

AVPlayerItemAccessLogEventMBS.URI as string

Type	Topic	Plugin	Version	macOS	Windows	Linux	iOS	Targets
property	AVFoundation	MBS AVFoundation Plugin	13.2	✅ Yes	❌ No	❌ No	✅ Yes	All

The URI of the playback item (read-only)

The value of this property may be nil if the URI is unknown.
(Read only property)