There are 3 distinct ways of screencasting:
- Direct screencasting.
- Video first
- Audio first
Is simply screencasting while one demonstrates the software. This has the burden of making it all seem fluent and eloquent while at the same time maintaing technical accuracy. The huge advantage though, is that it takes much less time. Audio and video retouching can still be made at post-production.
This is the technique I currently use for fast and short screencasts.
Allows the video to be recorded in a more laid back way. The audio, however, must match the video by replaying the video and activating the record function of Audacity or any other recorder in a fast move(alt-tabbing may work). Following along, talking about what is displayed in the video is much easier than narrating along with the mouse and keyboard. This allows for a much more professional sounding screencast, at the expense of time consumption trying to make it fit the video, and since the aim is too make it sound more professional, the rehearsal might take longer.
I currently use this for the middle quality screencasts.
This technique becomes easy if one has written the script beforehand, and simply reads it along. Once the audio is ready(which is the easy part), the video must be synchronized with the audio(considering the timing based on the current video's framerates in VirtuaDub and milliseconds played in Audacity can be easily translatable.) It is hard to come up with a rhythmic and well timed screencast using this method. It is best left for more elaborate presentations(live footage, animations, composited images and partly screencasts)
This technique I currently use for elaborate, time consuming presentations.