Article ID: 315959 - Last Review: January 31, 2007 - Revision: 4.2

Additional query strings for Windows Media Player

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SUMMARY

There are certain switches that you can use with Windows Media Player to assist you in troubleshooting issues. These switches are added in the form of a query string to the end of a requested URL.
  • WMThinning: Enables or disables Windows Media Player to automatically thin if network conditions dictate.

    Values: 0 (Disable) or 1 (Enable)
  • WMBitrate: Sets the maximum connection speed (BPS) that Windows Media Player can use.

    Values: Positive DWORD value
  • WMContentBitrate: Explicitly sets the bit rate of the content to be received (BPS).

    Values: Positive DWORD value
  • WMReconnect: Sets the number of times that Windows Media Player will try to automatically reconnect to content.

    Values: Positive integer
  • WMCache: Enables or disables Windows Media Player client caching and progressive streaming.

    Values: 0 (Disable) or 1 (Enable)
  • WMFecSpan: Sets the Forward Error Correction (FEC) span.

    Values: Positive DWORD value
  • WMFecPktsPerSpan: Sets the number of packets in a FEC span.

    Values: Positive DWORD value
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MORE INFORMATION

Examples

To disable Windows Media Player thinning: 
   mms://server/content.wmv?WMThinning=0
To specify that Windows Media Player has a 50 Kbps connection speed, and that it is trying to get a 100 Kbps stream from the content: 
   mms://server/content.wmv?WMBitrate=50000&WMContentBitrate=100000
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Supported Versions

The following table lists the supported Windows Media Player versions for the various switches:

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Windows Media Player 6.4Windows Media Player 7.xWindows Media Player XPWindows Media Player 9 Series
WMThinning     X     X     X      X
WMBitrate     X     X     X      X
WMContentBitrate     X     X     X      X
WMReconnect                  X
WMCache                  X
WMFecSpan                  X
WMFecPktsPerSpan                     X
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APPLIES TO
  • Microsoft Windows Media Player 6.4
  • Microsoft Windows Media Player 7.0
  • Microsoft Windows Media Player 7.1
  • Microsoft Windows Media Player 8.01
  • Microsoft Windows Media Player 8.01
  • Microsoft Windows Media Player 9 Series
  • Microsoft Windows Media Player 9 Series for Windows XP
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Keywords: 
kbdswmm2003swept kbinfo KB315959
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