使用Camtasia试一试,我用过,还可以的.

TechSmith's Camtasia is a screen camcorder and video production tool.
Use Camtasia to record screen activity as videos, edit and narrate the
clips, and publish the finished presentation in standard formats.
Develop videos that introduce new software, train new users of existing
software, or create any kind of active documentation. Distribute the
videos as standard AVI files, QuickTime files, streaming presentations,
or animated GIF files from a website. Use standard players to view
presentations, including the Windows Media Player or the RealNetworks
RealPlayer. With Camtasia's Live Output option, you can even use
Camtasia as a live source with streaming media encoders, video
conferencing, and web cam applications.