Here is beta 1:
http://neuron2.net/misc/dgdecodeim_b1.zip
As mentioned earlier, this requires you to use DGIndexNV to create your index file. I am working on an indexer that can be used without Nvidia.
Please read the Notes.txt document for usage information.
Your feedback will be appreciated.
EDIT: In some initial tests, QuickSync appears about 20-25% faster than CUVID.