Hi,
The EMS accepts H.264 video and AAC audio for input. Speex audio has to be transcoded to AAC before it can be fed to EMS. The existing Transcode API doesn’t provide this option yet. However, you are can customize the transcoder script for your special requirements.
The Transcode API of the EMS is documented here:
http://www.evostream.com/evo_evals/API%20Definition.pdf and
http://www.evostream.com/evo_evals/EMS%20User%20Guide.pdf
Cheers,
Don