There a few sample filters that have been written to support the other DeckLink DirectShow samples.

DecklinkKeyer is a simple dialog based Microsoft Windows video keying and preview application. It can blend either still images, BMPs or AVI movies over the input video of DeckLink cards that support keying.

DecklinkPlayback is a simple dialog based Microsoft Windows video playback application using Decklink for output. It can play Windows AVIs and Quicktime MOVs.