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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Video class
139
Video class
Availability
Flash Player 6.
Flash Media Server (not required).
The Video class lets you display live or recorded streaming video on the Stage without 
embedding it in your SWF file. The video may be a live video stream being captured with the 
 command, or a live or recorded video stream or MP3 audio stream being 
displayed through the use of a 
 command (which requires Flash Media 
Server).
Flash Player 7 supports Flash Video (FLV) encoded with the Sorenson Spark video codec. 
Flash Player 8 supports Flash Video (FLV) encoded with either the Sorenson or the On2 VP6 
codec and also supports an alpha channel. The On2 VP6 video codec uses less bandwidth 
than older technologies, and offers additional deblocking and deringing filters.
If your Flash content dynamically loads Flash Video (using either progressive download or 
Flash Media Server), you can use On2 VP6 video without having to republish your SWF for 
Flash Player 8, as long as users view your content through Flash Player 8. Only Flash Player 8 
supports both publish and playback of On2 VP6 video. By streaming or downloading On2 
VP6 video into Flash SWF version 6 or 7, and playing the content using Flash Player 8, you 
avoid having to recreate your SWF files for use with Flash Player 8.
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In Flash Player 7 and later, Flash Video (FLV) files can be played without the use of 
Flash Media Server. In Flash Player 8, you can use the On2 VP6 codec and an alpha 
channel. For more information, see the Video class entry in ActionScript 2.0 
Language Reference
.
Codec
Content (SWF) version 
(publish version)
Flash Player version (version 
required for playback)
Sorenson Spark
6
7
6, 7, 8
7, 8
On2 VP6
6
7
8
8*
8
8