This update to the WMCmd.vbs script originally included with Windows Media Encoder 9 Series adds support for WVC1 (WMV9 Advanced Profile) encoding, WMA10 Professional encoding, advanced WMV9 settings, AviSynth input, and better progress reporting.
Encoding to a multi-bitrate format such as Smooth Streaming requires that video resolution be varied with bitrate in order to maintain
consistent video quality across all bitrates. You can use this calculator to generate the desired multi-bitrate specifications.