Cacheable streaming media content

NetCache is preconfigured to cache content  

After you install a Windows Media, RealSystem, or QuickTime streaming media license and enable streaming media, the NetCache appliance is ready to cache on-demand streams using the default caching behavior settings. You can modify the way streams are cached using the options on the Splitting and Caching Behavior page in the Appliance Manager (Setup tab > Streaming > Splitting and Caching Behavior).

Cacheable streaming content  

Generally, NetCache caches RealNetworks, QuickTime, and Microsoft on-demand streaming media content. Live streams are split. See the Deployment Guide for more information.

Noncacheable streaming media content  

The following streaming media content is not cacheable:

• All RealNetworks non-RealMedia content:
  • SMIL (Synchronized Multimedia Integration Language)
  • RealText®
  • RealPix^TM
  • RealFlash
• RealMedia content with over 15 encodings in a particular track
• RealSystem Server authenticated streams
• RealNetworks streams that do not use unicast RDT (Real Data Transport) as the data transport
• Windows Media content accessed in fast-forward or rewind mode
• QuickTime content with unknown RTP timing parameters

Cacheable RealMedia MIME types  

NetCache will split or cache the following RealMedia MIME types:

• audio/x-pn-realaudio
• video/x-pn-realvideo
• application/x-pn-realevent

The application/x-pn-imagemap and image_map/x-pn-realvideo MIME types are not supported. These MIME types are proxied by NetCache.

Prefilling restrictions  

Noncacheable streaming content cannot be prefilled by either the confill command or ContentDirector.

Other content types that NetCache will not cache or split  

NetCache will not split or cache any of the following content:

• Managed content whose minimum age has not yet elapsed
• Content types for which the NetCache appliance has no license (for example, if only QuickTime is licensed, you cannot split or cache RealNetworks media).

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Part No. 210-00369
File: stream26.htm
Last updated: 11/12/02 12:13:46