With progressive streaming, a file is downloaded from the server, and usually starts to play while the rest of the file is still downloading. The entire file is downloaded and stored on the visitors computer.
Real time or server based streaming is designed for people who wish to have a lot of multimedia files on their website. As the name suggests, these files are stored on a special dedicated server and works very well for media to be viewed in "real time" such as live TV broadcasts, webinars, and internetbased classrooms. Some of the more popular streaming servers are the QuickTime Streaming Server from Apple, the Real Networks Server or the Windows Media Server.
With real time streaming the entire file is not downloaded to the player. It is much like watching TVonly the view may have the option to view ahead, look back, or skip around. Because real time servers can be very expensive they are not typically included in low cost packages. Some web hosts may offer this at an additional cost or have slightly higher pricing for web hosting packages that include this option.
If you are building a website and not sure whether you will use this feature it you may to consider the possibility you may want to expand and you this option later.
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