Adobe® Flex® 4 Language Reference
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flash.net 
NetStreamInfo 
Packageflash.net
Classpublic final class NetStreamInfo
InheritanceNetStreamInfo Inheritance Object

Language Version: ActionScript 3.0
Runtime Versions: Flash Player 10, AIR 1.5, Flash Lite 4

The NetStreamInfo class specifies the various Quality of Service (QOS) statistics related to a NetStream object and the underlying streaming buffer for audio, video, and data. A NetStreamInfo object is returned in response to the NetStream.info call, which takes a snapshot of the current QOS state and provides the QOS statistics through the NetStreamInfo properties.



Public Properties
 PropertyDefined By
  audioBufferByteLength : Number
[read-only] Provides the NetStream audio buffer size in bytes.
NetStreamInfo
  audioBufferLength : Number
[read-only] Provides NetStream audio buffer size in seconds.
NetStreamInfo
  audioByteCount : Number
[read-only] Specifies the total number of audio bytes that have arrived in the queue, regardless of how many have been played or flushed.
NetStreamInfo
  audioBytesPerSecond : Number
[read-only] Specifies the rate at which the NetStream audio buffer is filled in bytes per second.
NetStreamInfo
  audioLossRate : Number
[read-only] Specifies the audio loss for the NetStream session.
NetStreamInfo
  byteCount : Number
[read-only] Specifies the total number of bytes that have arrived into the queue, regardless of how many have been played or flushed.
NetStreamInfo
 Inheritedconstructor : Object
A reference to the class object or constructor function for a given object instance.
Object
  currentBytesPerSecond : Number
[read-only] Specifies the rate at which the NetStream buffer is filled in bytes per second.
NetStreamInfo
  dataBufferByteLength : Number
[read-only] Provides the NetStream data buffer size in bytes.
NetStreamInfo
  dataBufferLength : Number
[read-only] Provides NetStream data buffer size in seconds.
NetStreamInfo
  dataByteCount : Number
[read-only] Specifies the total number of bytes of data messages that have arrived in the queue, regardless of how many have been played or flushed.
NetStreamInfo
  dataBytesPerSecond : Number
[read-only] Specifies the rate at which the NetStream data buffer is filled in bytes per second.
NetStreamInfo
  droppedFrames : Number
[read-only] Returns the number of video frames dropped in the current NetStream playback session.
NetStreamInfo
  maxBytesPerSecond : Number
[read-only] Specifies the maximum rate at which the NetStream buffer is filled in bytes per second.
NetStreamInfo
  playbackBytesPerSecond : Number
[read-only] Returns the stream playback rate in bytes per second.
NetStreamInfo
 Inheritedprototype : Object
[static] A reference to the prototype object of a class or function object.
Object
  SRTT : Number
[read-only] The smoothed round trip time (SRTT) for the NetStream session, in milliseconds.
NetStreamInfo
  videoBufferByteLength : Number
[read-only] Provides the NetStream video buffer size in bytes.
NetStreamInfo
  videoBufferLength : Number
[read-only] Provides NetStream video buffer size in seconds.
NetStreamInfo
  videoByteCount : Number
[read-only] Specifies the total number of video bytes that have arrived in the queue, regardless of how many have been played or flushed.
NetStreamInfo
  videoBytesPerSecond : Number
[read-only] Specifies the rate at which the NetStream video buffer is filled in bytes per second.
NetStreamInfo
  videoLossRate : Number
[read-only] Provides the NetStream video loss rate (ratio of lost messages to total messages).
NetStreamInfo
Public Methods
 MethodDefined By
 Inherited
Indicates whether an object has a specified property defined.
Object
 Inherited
Indicates whether an instance of the Object class is in the prototype chain of the object specified as the parameter.
Object
 Inherited
Indicates whether the specified property exists and is enumerable.
Object
 Inherited
Sets the availability of a dynamic property for loop operations.
Object
 Inherited
Returns the string representation of this object, formatted according to locale-specific conventions.
Object
  
Returns a text value listing the properties of the NetStreamInfo object.
NetStreamInfo
 Inherited
Returns the primitive value of the specified object.
Object
Property Detail

audioBufferByteLength

property
audioBufferByteLength:Number  [read-only]

Language Version: ActionScript 3.0
Runtime Versions: Flash Player 10, AIR 1.5, Flash Lite 4

Provides the NetStream audio buffer size in bytes. It specifies the buffer size for audio data in streaming media, both live and recorded. This property is like Netstream.bytesLoaded, which is used in progressive downloads.



Implementation
    public function get audioBufferByteLength():Number

audioBufferLength

property 
audioBufferLength:Number  [read-only]

Language Version: ActionScript 3.0
Runtime Versions: Flash Player 10, AIR 1.5, Flash Lite 4

Provides NetStream audio buffer size in seconds. This property extends the NetStream.bufferLength property and provides the buffer length in time specifically for audio data.



Implementation
    public function get audioBufferLength():Number

audioByteCount

property 
audioByteCount:Number  [read-only]

Language Version: ActionScript 3.0
Runtime Versions: Flash Player 10, AIR 1.5, Flash Lite 4

Specifies the total number of audio bytes that have arrived in the queue, regardless of how many have been played or flushed. You can use this value to calculate the incoming audio data rate, using the metric of your choice, by creating a timer and calculating the difference in values in successive timer calls. Alternatively, use audioBytesPerSecond.



Implementation
    public function get audioByteCount():Number

See also

audioBytesPerSecond

property 
audioBytesPerSecond:Number  [read-only]

Language Version: ActionScript 3.0
Runtime Versions: Flash Player 10, AIR 1.5, Flash Lite 4

Specifies the rate at which the NetStream audio buffer is filled in bytes per second. The value is calculated as a smooth average for the audio data received in the last second.



Implementation
    public function get audioBytesPerSecond():Number

audioLossRate

property 
audioLossRate:Number  [read-only]

Language Version: ActionScript 3.0
Runtime Versions: AIR 1.0 Flash Player 10, Flash Lite 4

Specifies the audio loss for the NetStream session. This value returns a valid value only for RTMFP streams and would return 0 for RTMP streams. Loss rate is defined as the ratio of lost messages to total messages.



Implementation
    public function get audioLossRate():Number

byteCount

property 
byteCount:Number  [read-only]

Language Version: ActionScript 3.0
Runtime Versions: Flash Player 10, AIR 1.5, Flash Lite 4

Specifies the total number of bytes that have arrived into the queue, regardless of how many have been played or flushed. You can use this value to calculate the incoming data rate, using the metric of your choice, by creating a timer and calculating the difference in values in successive timer calls. Alternatively, use currentBytesPerSecond.



Implementation
    public function get byteCount():Number

See also

currentBytesPerSecond

property 
currentBytesPerSecond:Number  [read-only]

Language Version: ActionScript 3.0
Runtime Versions: Flash Player 10, AIR 1.5, Flash Lite 4

Specifies the rate at which the NetStream buffer is filled in bytes per second. The value is calculated as a smooth average for the total data received in the last second.



Implementation
    public function get currentBytesPerSecond():Number

dataBufferByteLength

property 
dataBufferByteLength:Number  [read-only]

Language Version: ActionScript 3.0
Runtime Versions: Flash Player 10, AIR 1.5, Flash Lite 4

Provides the NetStream data buffer size in bytes. It specifies the buffer size for data messages in streaming media, both live and recorded. This property is like Netstream.bytesLoaded, which is used in progressive downloads.



Implementation
    public function get dataBufferByteLength():Number

dataBufferLength

property 
dataBufferLength:Number  [read-only]

Language Version: ActionScript 3.0
Runtime Versions: Flash Player 10, AIR 1.5, Flash Lite 4

Provides NetStream data buffer size in seconds. This property extends the NetStream.bufferLength property and provides the buffer length in time specifically for data messages.



Implementation
    public function get dataBufferLength():Number

dataByteCount

property 
dataByteCount:Number  [read-only]

Language Version: ActionScript 3.0
Runtime Versions: Flash Player 10, AIR 1.5, Flash Lite 4

Specifies the total number of bytes of data messages that have arrived in the queue, regardless of how many have been played or flushed. You can use this value to calculate the incoming data-messages rate, using the metric of your choice, by creating a timer and calculating the difference in values in successive timer calls. Alternatively, use dataBytesPerSecond.



Implementation
    public function get dataByteCount():Number

See also

dataBytesPerSecond

property 
dataBytesPerSecond:Number  [read-only]

Language Version: ActionScript 3.0
Runtime Versions: Flash Player 10, AIR 1.5, Flash Lite 4

Specifies the rate at which the NetStream data buffer is filled in bytes per second. The value is calculated as a smooth average for the data messages received in the last second.



Implementation
    public function get dataBytesPerSecond():Number

droppedFrames

property 
droppedFrames:Number  [read-only]

Language Version: ActionScript 3.0
Runtime Versions: Flash Player 10, AIR 1.5, Flash Lite 4

Returns the number of video frames dropped in the current NetStream playback session.

In recorded streaming or progressive download, if the video is a high-quality or high-resolution, high-bitrate video, the decoder can lag behind in decoding the required number of frames per second if it does not have adequate system CPU resources. In live streaming, the buffer drops video frames if the latency is too high. This property specifies the number of frames that were dropped and not presented normally.



Implementation
    public function get droppedFrames():Number

maxBytesPerSecond

property 
maxBytesPerSecond:Number  [read-only]

Language Version: ActionScript 3.0
Runtime Versions: Flash Player 10, AIR 1.5, Flash Lite 4

Specifies the maximum rate at which the NetStream buffer is filled in bytes per second. This value provides information about the capacity of the client network based on the last messages received by the NetStream object. Depending on the size of the buffer specified in NetStream.bufferTime and the bandwidth available on the client, Flash Media Server fills the buffer in bursts. This property provides the maximum rate at which the client buffer is filled.



Implementation
    public function get maxBytesPerSecond():Number

playbackBytesPerSecond

property 
playbackBytesPerSecond:Number  [read-only]

Language Version: ActionScript 3.0
Runtime Versions: Flash Player 10, AIR 1.5, Flash Lite 4

Returns the stream playback rate in bytes per second. The playback buffer can contain content of various playlists. This property provides the playback rate that closely matches the bit rate of the currently playing stream.



Implementation
    public function get playbackBytesPerSecond():Number

SRTT

property 
SRTT:Number  [read-only]

Language Version: ActionScript 3.0
Runtime Versions: Flash Player 10, AIR 1.5, Flash Lite 4

The smoothed round trip time (SRTT) for the NetStream session, in milliseconds. This property contains a valid value only for RTMFP streams. For RTMP streams, the value is 0.



Implementation
    public function get SRTT():Number

See also

videoBufferByteLength

property 
videoBufferByteLength:Number  [read-only]

Language Version: ActionScript 3.0
Runtime Versions: Flash Player 10, AIR 1.5, Flash Lite 4

Provides the NetStream video buffer size in bytes. It specifies the buffer size for video data in streaming media, both live and recorded. This property is like Netstream.bytesLoaded, which is used in progressive downloads.



Implementation
    public function get videoBufferByteLength():Number

videoBufferLength

property 
videoBufferLength:Number  [read-only]

Language Version: ActionScript 3.0
Runtime Versions: Flash Player 10, AIR 1.5, Flash Lite 4

Provides NetStream video buffer size in seconds. This property extends the NetStream.bufferLength property and provides the buffer length in time specifically for video data.



Implementation
    public function get videoBufferLength():Number

videoByteCount

property 
videoByteCount:Number  [read-only]

Language Version: ActionScript 3.0
Runtime Versions: Flash Player 10, AIR 1.5, Flash Lite 4

Specifies the total number of video bytes that have arrived in the queue, regardless of how many have been played or flushed. You can use this value to calculate the incoming video data rate, using the metric of your choice, by creating a timer and calculating the difference in values in successive timer calls. Alternatively, use videoBytesPerSecond,



Implementation
    public function get videoByteCount():Number

See also

videoBytesPerSecond

property 
videoBytesPerSecond:Number  [read-only]

Language Version: ActionScript 3.0
Runtime Versions: Flash Player 10, AIR 1.5, Flash Lite 4

Specifies the rate at which the NetStream video buffer is filled in bytes per second. The value is calculated as a smooth average for the video data received in the last second.



Implementation
    public function get videoBytesPerSecond():Number

videoLossRate

property 
videoLossRate:Number  [read-only]

Language Version: ActionScript 3.0
Runtime Versions: Flash Player 10.1, AIR 2

Provides the NetStream video loss rate (ratio of lost messages to total messages).

When the message size is smaller than the maximum transmission unit (MTU), this value corresponds to the network packet loss rate.

This property returns a valid value only for RTMFP streams. For RTMP streams, it returns a value of zero. For more information, see the Flash Media Server documentation.



Implementation
    public function get videoLossRate():Number
Method Detail

toString

()method
public function toString():String

Language Version: ActionScript 3.0
Runtime Versions: Flash Player 10, AIR 1.5, Flash Lite 4

Returns a text value listing the properties of the NetStreamInfo object.

Returns
String — A string containing the values of the properties of the NetStreamInfo object