How to find out the real streaming bitrate (MBR Stream)

From: Ravi Raman (ravira_at_Online.microsoft.com)
Date: 08/05/04

  • Next message: Chris: "Automating Multicast Setup" 
    Date: Thu, 5 Aug 2004 10:55:00 -0700

    Hi Pascal,

    There is a c-max-bandwidth and avgbandwidth entries in the
    log file.

    For explanation of what these two fields mean, here it is
    from the SDK Documentation:

    avgbandwidth: Average bandwidth (in bits per second) at
    which the client is connected to the server. This is the
    average value for the duration of the connection.

    c-max-bandwidth: Maximum client bandwidth, in bits per
    second. You can use this to determine whether clients have
    the capacity for higher bandwidth content. This field can
    have the following values:
    a) the number of bits per second reported from the client.
    b) an undetermined amount, logged as 0.
    c) a very large number of bits per second that cannot be
    accurately measured but is greater than one million and
    less than one billion, logged as a hyphen (-).
    d) a hyphen (-) when a file is being played from the local
    cache and no bandwidth is used.

    If this will not suffice, you can look for
    the "WMS_PRESENT_WMSSINK_SELECTED_BITRATE" in the
    Presentation context during the "PLAY" event which will
    contain the bit rate of the content that is being sent to
    the client.

    Hope this helps.
    Ravi 

    --
This posting is provided "AS IS" with no warranties, and 
confers no rights. 
>-----Original Message-----
>Hi,
>
>We provide videos with multiple bit rates on a windows 
media service 9 
>server. Now, we'd like to get some statistics about the 
really used 
>bitrates.
>
>e.g. The stream contains the following bitrates: 967, 
827, 697 and 567 
>kbit/s. Now a user with a bandwidth of 600 kbit/s 
connects to the server 
>and the player chooses the 567 kbit/s stream. How can we 
find out, which 
>bitrate the user has used?
>
>First, I tried to find the information in the server log 
files. Bit I 
>couldn't found anything.
>
>Then I tried to log it with an own IWMSEventNotification 
plugin. But I 
>don't know which context-property contains the required 
information.
>
>Thanks
>Pascal
>.
>
  • Next message: Chris: "Automating Multicast Setup"

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