Macromedia flash media server 2-client-side actionscript language reference for flash media server 2 ユーザーズマニュアル

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Client-Side ActionScript Language Reference
Example
The following function publishes a stream on a NetConnection named 
my_nc
 containing the 
camera output from 
active_cam
.
function pubLive() {
// Create a new source stream.
var source_ns:NetStream = new NetStream(my_nc);
/* Attach the camera activity to the source stream. This call causes a 
warning message to show which service is requesting access. It also gives 
the user the option of not sending the camera activity to the server. */
source_ns.attachVideo(active_cam);
// Get the stream name from the user input.
var mySubj:String = subject;
/* Assuming the user named the stream 'webCamStream',
publish the live camera activity as 'webCamStream'. */
source_ns.publish(mySubj, "live");
}
See also the example for 
See also
NetStream.bufferLength
Availability
Flash Player 6.
Flash Communication Server MX 1.0.
Usage
public bufferLength : Number [read-only]
Description
Property (read-only); the number of seconds of data currently in the buffer. You can use this 
property in conjunction with 
 to estimate how close the buffer is to 
being full—for example, to display feedback to a user who is waiting for data to be loaded 
into the buffer.