USBVision for Mac

From EchoFX:

The USBVision software offers Mac OS X support not only for XLR8 InterView, but also for a wide range of new devices including Belkin VideoBus and VideoBus II, iRez USB Live and CapSure, Global Village VideoFX, Alpha Data USB Video Adapter, Hauppauge USB-Live and many others -including those originally sold as PC-only. Mac OS X support for most of these devices was previously unavailable.

• Supports a wide range of video capture devices.
• 352 x 240, 29.97 frames per second NTSC video capture.
• 352 x 288, 25 frames per second PAL/SECAM video capture.
• Supports composite and s-video formats.
• High contrast, high quality video better than DV at the same size.
• Excellent audio/video synchronization.
• Low disk space requirements: 4 GB per hour for video and audio.
• High resolution single frame capture.
• Audio support for devices that have audio input, e.g. Belkin VideoBus II.
• Snapshot button support for devices that snapshot buttons, e.g. Belkin VideoBus.
• Multiple device support for broadcasting, webcam, and surveillance applications.
• Dynamic Quality Management, for maintaining the best quality possible during capture.
• Auto-Detect Input And Format, to automatically adapt to the current video source.
• Fast Record Playback, for near real-time playback during captures.*
• Easy to use, AppleScript enabled capture software with fast full screen playback.**
• Software to export movies to any QuickTime supported format, including DV.
• Compatible with a large number of third-party applications.
• Fast Record Playback requires a G4 processor.
• Full screen playback requires a G4 processor and an accelerated graphics card.