The 2246 is a USB 2.0 A/V (audio and video) MPEG-1/2/4 (MPEG ISO 14496-2) processor that supports multiple video input formats, including SDI 1080i, 720p, and both SDI and analog NTSC/PAL SD. It compresses video and stereo audio to MPEG-1 system stream, MPEG-2 program stream, or MPEG-4 (AVI), and sends the resulting stream onto USB. At the same time, it can capture uncompressed full-frame snapshots and send them over USB, while it simultaneously generates live or freeze frame video on its four video outputs.