Here's a compressor setting to prep just about any HD video (720P, 1080i, or 1080p) for a High Definition Grass Valley Turbo box. The resulting 1080i MPEG-2 video files should get sucked into the Turbo without any recompression. Otherwise, you'll be stuck with the Turbo's very long compression times and unpredictable results.
Download the Compressor setting here, unzip it, and put the .setting file in your ~user/Library/Application Support/Compressor folder. Restart Compressor, and you'll see it in the Custom Folder of your Settings window.
Warning: Always do full play-through test screenings after ingesting your footage into the Turbo.
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