WHAT IS BTV EXTERNINATOR?
The goal of BTV-Externinator is to perform recordings, using capture devices not currently supported by Beyond TV (i.e. Firewire, DVB, unencrypted QAM, etc.). For instance, I used this plugin with BeyondTV before the SiliconDust HDHR was officially supported. The addon acts as a bridge between BTV's powerful scheduling and an external application, which knows how to perform recordings with that unsupported capture device (i.e. VLC, ProgDVB, FusionHDTV, etc.) This add-in is free donationware coded by the long-time BeyondTV user Fonceur
Read more at the Snapstream Forums here and here. Also the BTV Externinator Website