What video encoding formats are supported?
The designer or developer is free to use any encoding format for their video supported by the Windows Media Video codec. This includes Variable Bit Rate (VBR) encoding for DVD-quality video and the use of the VC-1 codec for high-definition content. Remember that the optimized output rate from the service is 1.4 megabits per second. Silverlight Streaming also provides transcoding in the cloud if the user chooses the Manage Video scenario. In that case, a wide variety of formats are supported in input, and a high quality WMV file encoded at 1.4 Mbps with VC_1 codecs will be generated as output. The technical details of the profile used by the Silverlight Streaming transcoding service are provided in the SDK on http://dev.live.com/silverlight.