Any time you are working with video, you can expect large file sizes. Camtasia enables you to produce videos in a variety of different formats. The format you choose will largely depend on your audience's connection speed and the quality video you desire. However, Adobe Flash is generally a good option that provides reasonable quality audio/video, cross-platform support, and a free media player that can be viewed in most browsers.

• Flash movie (.swf)
• Flash video (.flv)
• Quick Time movie (.mov)
• Windows Media (.wmv)
• Real Media (.rm)
• Camtasia for real player streaming media (.camv)
• Animated GIF (.gif)

Since video file sizes tend to be quite large, remember to record an area of the screen that is the minimum size required to deliver your presentation effectively. Recording excessive areas of the screen will cause your file size to increase drastically, and may also increase the amount of time and effort it takes to edit and prepare your presentation. Below is a list of approximate file sizes for various recording sizes (these sizes are for 5 minute video with accompanying audio unless otherwise noted).

The quality of video varies depending on file size as well as the sampling rate of the audio and video. However a larger file size does not neccessarily mean higher quality video. Varying the audio and video settings can keep file size down. The most straightforward way to change the video quality is to vary the frame rate. More significant differences will be noticed in files with more movement in the capture. Standard AVI files created with Camtasia will be recorded with 15 frames per second. The following chart is an extimate for a 300 x 500 high motion Flash video at varying frame rates: