Are you talking about the Enigma-TV Server tool or a client application ?
From the server the channel switch should be instantly... From a client app, it can take up to 20 seconds before the change because the server app needs time to prepare the compressed stream.
I have an edision os mini (openvix latest). Running windows7x64 on a 4xCore. When I run the app on my PC, the picture etc is faultless, but any attempt to change channel takes around 20 seconds.
If I use the openweb interface to the sat box, the change is instantaneous. This is also the case when I use various apps to connect too, the channel change is instant.
This app, for whatever reason, takes a lot longer.
Any ideas? Because at the minute the app is pretty much pointless for me.