Does anyone know what this means?
That you are using an alpha (or beta?) version.
You should use the SV 7.x builds. Files created with such encoder will not be supported by future decoders.
The purpose for Test Encoder Binaries are listening tests and NOT FOR ARCHIVAL.The file format can change every day, so for testing use the newest decoder source and compile it with StreamVersion 8 support on.
The alpha version do not output normal SV7 files. They are what should end out to be SV8 and is changing with every release.