| Flash Video Format |
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Mostly, Flash Video files contain video bit streams which are a variant of H.263 video standart, which is called Sorenson Spark. Flash 8 and newer versions support the playback Of On2 True Motion VP6 video bit streams. When using lower bit rates, On2 VP6 provided a higher visual quality than H.263. The new beta version of Flash Player 9 include support for H.264 video standard , know as MPEG-4 ,which offer significantly better quality ratio.
An optional alpha channel which represents per pixel transparency is supported by including a second simultaneous video stream which encodes the alpha channel only, dropping any chromatic information.
The performance makes the assumption that YUV data of the main
On2 VP6 video stream is always converted to RGB by the client. This option is only available for On2 VP6 encoded video streams.
Only Two versions are supported by The Flash Video file format. The first one is called 'screenshare' codec which is an encoding format designed for screencasts. The second version is only compatible with Flash Player 8 and newer.
Using an encoding tool included with Adobe's Macromedia Flash Professional 8 product you are enable to encoding Flash Video files.