А как вот такое устройство
EzCAP 4-Channel/4-Input USB DVR Video Capture/Surveillance Dongle (PAL/NTSC)
- EZCAP 4 Channel USB DVR
- MPEG-4 encoding and decoding hardware for fast and low CPU usage recordings
- Accepts up to 4 simultinuous video inputs
- Supports both PAL/NTSC
- Maximum capture resolution: 1024*768, 16bits/32bits
- 50kbps-1.2Mbps hardware MPEG-4 encoding
- Supports motion detection, motion actived recording, scheduled recording, always-on recording, loop/perpetual recording, etc
- Supports P.T.Z. (pan, tilt, zoom) controls (if supported by camera)
- Comes with USB extension cable
по заявленным характеристика написано что жмет аппаратно
стоит 32 бакса