5b916d7a_d_DIVX_supported___WMPoweruser__Supported_Scenarios
[Decoder Support] Adaptive Multi-Rate Narrow Band (AMR-NB) This codec is unsupported in Windows Phone Emulator. [Container] 3GP, 3G2, MP4 [Possible Audio Combinations] N/A [Max Capabilities] Up to 12.2 Kbps Constant bit rate Up to 8 kHz 1 or 2 channels [Supported Scenarios] 
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Updates codec support list for Windows Phone 7 released, XVID and DIVX supported - WMPoweruser
Supported Scenarios