The turbo.264 HD from Elgato Systems is a USB hardware accelerator for H.264 video encoding. It can be used to convert video for use on the Apple TV, iPod, iPhone, and other devices that support the MPEG-4 files encoded with H.264.
The turbo.264 HD uses dedicated hardware to compress video. Software-based conversion can take up to an hour for a 15-minute video; the turbo.264 HD cuts that time to less than 20 minutes. This is an excellent option for anyone who has video content that they would like to play on their Apple TV, iPod, or iPhone.