Screencast

A screencast is a digital recording of computer screen output, also known as a video screen capture, often containing audio narration. Although the term screencast dates from 2004, products such as Lotus ScreenCam were used as early as 1994.[1][2] Early products produced large files and had limited editing features. More recent products support more compact file formats such as Adobe Flash and have more sophisticated editing features allowing changes in sequence, mouse movement, and audio.

Just as a screenshot is a picture of a user's screen, a screencast is essentially a movie of what a user sees on their monitor.

Uses

Screencasts are useful for demonstrating software features. Creating a screencast helps software developers show off their work. Screencasts are a useful tool for ordinary software users as well, to help report bugs (the movie takes the place of potentially unclear written explanations) or to show others how a given task is accomplished in a specific software environment. Screencasts are excellent tools for learning how to use computers, and several podcasts have started to teach computer users how to use software through screencasts.

Considering the high cost of instructor / faculty led training and the relative ineffectiveness of typical computer based training (CBT) systems, screencasting is likely to become a very popular technique for imparting high-quality knowledge at a low cost.

For example, organizers of computer related seminars may choose to routinely record complete seminars and make them available on DVDs to all attendees for future reference and/or sell these recordings to people who cannot afford the fee of the live seminar or don't have time to attend it. This will generate an additional revenue stream for organizers of seminars and make the knowledge available to a broader audience, so generating a win-win situation for everybody.

This strategy of recording seminars is already widely used in fields where using a simple video camera or audio recorder is sufficient to make a useful recording of a seminar. Computer-related seminars need high quality and easily readable recordings of screen contents which is usually not achievable by using a video camera to film the desktop which is usually projected onto the wall by a projector.

A drawback of most commercial screencasting programs for the PC is their inability to make videos of OpenGL applications, though Demo Builder, Fraps, and Growler Guncam can cope with this.

Origin of the term

In 2004, columnist Jon Udell invited[3] readers of his blog to propose names for the emerging genre. Udell selected[4] the term screencast, which was proposed by both Joseph McDonald and Deeje Cooley. His "Heavy metal umlaut" screencast is a well-known example - which explains how Wikipedia works, illustrating the history of the Heavy metal umlaut wikipedia article.

It should be noted that the term "ScreenCam" or "ScreenCam Movie" is sometimes used to refer to the same concept, especially given Lotus/IBM's pioneering work in producing a screen-recording utility back in the 1990s. However, "ScreenCam" is a term originally trademarked by Lotus Corporation and really refers to the name of a software product. The trademark of the term has since changed, and is currently held by a software manufacturer, SmartGuyz, Incorporated, who is producing a software product that in like manner records the screen and allows creation of editable, self-playing movies. Hence the two terms, "ScreenCast" and "ScreenCam", while related, are not interchangeable, as one refers to generic creation and playback of screen movies, while the other refers to a trademarked software product produced by a commercial entity.

Since then, the term has gained widespread use, and the use of screencasts has itself become more popular.

Hardware for Screencasting

An alternative solution for capturing a screencast is the use of a hardware RGB or DVI frame grabber card. This approach does not have the OpenGL limitations mentioned above, and places the burden of the recording and compression process on a machine separate from the one generating the visual material being captured.

External links

• O'Reilly Digital Media: What Is Screencasting, a screencasting guide by Jon Udell
• All About ScreenCasting - Jon Udell of InfoWorld
• The Screening Room with Jon Udell - A monthly series of screencasts about important software
• Capturing Screencasts on a Mac - Complete overview of screencasting on the Mac, including workflow, software, and editing.
• Good, Robin (2004–2006). "PowerPoint to Flash Conversion Tools - The PPT2Flash Top20". Retrieved 2006-09-25.{{cite web}}: CS1 maint: date format (link)
• TeachMac & TeachIT - Example of use of screencast technology for CBT.
• Ubuntu Screencasts - video how-tos for Ubuntu Linux
• Ubuntu Video - Features Ubuntu and open source software related screencasts
• RecordMyDesktop (Ubuntu)
• The Secret to Screencasting with Ubuntu and Free Software - Details one method to create screencasts using only Free Software.
• ShowMeDo - Popular screencasting site.

See also

• ScreenCam A current production screen-camcorder product produced by SmartGuyz, Incorporated.
• CamStudio An easy to use light weight capturing application able to capture full screen resolution screencasts and encode directly into Xvid and DivX.
• Flash - SWF
• Flash Video - FLV
• MatchWare Screencorder, a user-friendly Windows application for capturing screencasts and adding annotations and interactivity.
• Non-linear editing system
• PowerPoint
• Presentation Programs
• Screenshot
• Video
• Video capture
• Video editing software
• Vodcast - Video Podcasting
• Wink (tutorial software) A useful freeware program which can be used for creating screencasts
• xvidcap, a small tool to capture things going on on an X Window display

Categories

• Presentation software (category)
• Microsoft PowerPoint

Lists

• List of video topics
• List of screencasting software
• Comparison of screencasting software
• List of video editing software
• Comparison of video editing software

Sources

• US Patent and Trademark Office entries for Lotus "ScreenCam" - The trademark for "ScreenCam" (registration #1920750) was filed by Lotus Corporation on 2 Aug 1993, granted 19 Sept 1995, first public use 28 Jan 1994.
• US Patent and Trademark Office entries for SmartGuyz "ScreenCam" - The trademark for "ScreenCam" (registration #2979843) is currently registered to SmartGuyz, Incorporated, a United States Corporation.

Surveillance

• Computer surveillance, spy software, screen recording and keylogging software can be used to snoop on computer sessions.