we have problems with silverlight (smoothstreaming) on Wowza Server 3.1.2. We are using several bitrates with different resolutions. They work perfectly fine on their own.

Once they are added to a smil file for multi-bitrate streaming, wowza fails to deliver the right files after switching to one of the higher bitrates.

What you see in this screenshot is the silverlight player trying to render the F4 format (lowest format, first format in smil) with the resolution of the F7 format (highest format). The player requests the F7 format file from the wowza server (according to Firebug/Chrome Debug), but it returns the F4 format. This results in broken output.

The root problem is that the keyframes are not aligned, but the reason why I report this here, is that Wowza fails to deliver the right files.