MACROMEDIA FLASH COMMUNICATION SERVER MX-SERVER-SIDE COMMUNICATION ACTIONSCRIPT DICTIONARY Spécifications télécharger pdf (Page 218)

Client-Side Communication ActionScript 27

Returns

Nothing.

Description

Method; sets the maximum amount of bandwidth per second or the required picture quality of

the current outgoing video feed. This method is generally applicable only if you are transmitting

video using Flash Communication Server.

Use this method to specify which element of the outgoing video feed is more important to your

application—bandwidth used or picture quality.

• To indicate that bandwidth use takes precedence, pass the desired value for bandwidth and 0

for frameQuality. Flash will transmit video at the highest quality possible within the specified

bandwidth. If necessary, Flash will reduce picture quality to avoid exceeding the specified

bandwidth. In general, as motion increases, quality decreases.

• To indicate that quality takes precedence, pass 0 for bandwidth and a numeric value for

quality. Flash will use as much bandwidth as required to maintain the specified quality. If

necessary, Flash will reduce the frame rate to maintain picture quality. In general, as motion

increases, bandwidth use also increases.

• To specify that both bandwidth and quality are equally important, pass numeric values for

both parameters. Flash will transmit video that achieves the specified quality and that doesn’t

exceed the specified bandwidth. If necessary, Flash will reduce the frame rate to maintain

picture quality without exceeding the specified bandwidth.

Example

The following examples illustrate how to use this method to control bandwidth use and

picture quality.

// Ensure that no more than 8192 (8K/second) is used to send video

activeCamera.setQuality(8192,0);

// Ensure that no more than 8192 (8K/second) is used to send video

// with a minimum quality of 50

activeCamera.setQuality(8192,50);

// Ensure a minimum quality of 50, no matter how much bandwidth it takes

activeCamera.setQuality(0,50);

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MACROMEDIA FLASH COMMUNICATION SERVER MX-SERVER-SIDE COMMUNICATION ACTIONSCRIPT DICTIONARY Spécifications Page 218