Expression Encoder 4 is the latest version of the screencast software by Microsoft for Windows-based systems. With Expression Encoder 4, you can record a screencast of your screen activity while simultaneously capturing the webcam video and audio narration from a microphone. Alternatively, you could also capture screen activity first and later add a voiceover, using its Audio Overlay feature.
In 2003, the company was acquired by eHelp Corporation who owned a competing product called RoboDemo (now called Adobe Captivate[4][5][6]). eHelp Corporation released an updated version as CamStudio 2.1 under a proprietary software license only and removed the ability to create SWFs.[7] A succession of acquisitions led to the company being owned by Adobe.
It's an excellent choice for those that have to provide technical support or developer who have to design tutorials to explain how to use their programs. The range of output files is admittedly limited - CamStudio will only output in AVI format but you can also convert movies to Flash (SWF). You can also choose the codecs used to encode your screen capture shots and set the frame rate you need to capture at.

There have been ongoing reports about malicious code contained in some binaries of the software. In 2013, Google-run website VirusTotal declared that CamStudio contains malicious software, where most anti-virus programs detected Artemis Trojan in CamStudio installer file.[10] In January 2014, the binary on the webpage was reported to be infected with the trojan, Artemis!0FEA2B12900D.[citation needed]
LOTS of errors. I know it's good software, and I would definitely recommend it, it has too many errors. Just today I tried to record my webcam, and got "An unexpected error has occurred. Capture cannot be started". I have searched for answers and typically could not find any. Sometimes when I edit clips they crash the software and then I lose sometimes hours of hard work.
Camstudio falls into this latter category. If Stephen Spielberg were to take screenshots instead of make films then he'd probably use something along the lines of this app. Camstudio is an excellent and fully comprehensive screenshot solution for anyone that needs to go beyond simple illustration and really needs to show the end user exactly how to use an application on program.