multi audio

Hi, I have another question regarding the product. We have video files with multi-audio, let’s say german,french,english audio tracks along with one video stream. Is it possible to tell evostream to stream a RTSP movie with one of these audio track. In fact we have movie with 18 audio tracks, we want to avoid to multiply the number of movie, just due to have one language=one video file. So we embedded all audio inside a movie. Now, is is possible to select the audio to serve, depending on an url parameter, or the name of the movie to get… Thanks