According to DashCast, we should provide a configuration file of several entries. Something like this:

[v1] 
type=video 
width=1280 
height=720 
bitrate=800000 
[v2]
type=video 
width=640 
height=360 
bitrate=400000 
[a1]
type=audio
bitrate=128000
[a2]
type=audio
bitrate=256000

I'm wondering where I can get a spec of options for this configuration file?