Since I started to put serious amounts of time and effort into screencasting last summer, I’ve gotten a lot of requests to blog about how I go about making these things. Starting with this post, I’m going to do a multi-part series here about making screencasts — or at least how I make screencasts, which is a long way from perfect or canonical, but it’s what people asked for! I hope it’s useful for people who are interested in this kind of thing and need some pointers; and I hope too that those with more experience and better ideas than I have can share.
First, let’s start with a few FAQ’s.
Q: What is a screencast?
A: A screencast is a video of stuff that is happening on your computer screen. There is often, but not always, some kind of voiceover happening in the background as well. So a screencast can be a lot of different things: A recorded Prezi or PowerPoint slide presentation; a demo of computer software; a “whiteboard” lecture with audio capture; a video of you playing Angry Birds; or any linear combination of these.
Q: What’s the point of a screencast?
A: I suppose you could do just about anything with a screencast, but mainly the point is to instruct. Some people make short screencasts to show a remote collaborator or student how to do some little task on their computer, like this one I made on the fly in Linear Algebra class last Thursday morning to show students how to get MATLAB to produce \(\LaTeX\) code. Or you can record partial or entire lectures (like many of the ones I did for my department’s YouTube channel) for students to watch outside of class. Or you can record lengthy demos of software usage like I have done in my ongoing series of MATLAB screencasts. Or you can record every level of Angry Birds you play. Suit yourself.
The screencast is just a means of conveying some process or stream of information that can be represented on the screen and therefore captured using software and disseminated on the web. It’s a pretty much wide-open medium.
Q: So what kinds of software and hardware and other stuff do you use?
This is a good question, but at this point I have to stop the FAQ’s and explain why there are going to be multiple posts in this series. I have a toolbox of software and hardware items that I use, but the exact combination that I use depends on the kind of screencast that I am trying to make. Basically, there are three different kinds of screencasts that I make:
- Lecture capture screencasts, where I am going through a Prezi or slide deck and giving audio narration;
- Whiteboard screencasts, where I am using an input device to hand-write things on the screen so that it looks like a typical whiteboard presentation; and
- Demo screencasts, where I am doing a straight-up screen capture of something happening on my computer (as opposed to a presentation or “whiteboard” work) in real time.
Each of these kinds of screencasts requires a different set of software and hardware tools, as well as a different set of approaches for actually making them. So I’m going to spend at least one post on each. Actually, most of my screencasts are really combinations of these; for example a lot of the MATLAB screencasts start and end with a lecture capture and have MATLAB demos in the middle.
In the next post, I’ll start things off by focusing on lecture capture screencasts and how I work with those. They’re probably the simplest of the three kinds I make.
Do you have any specific question or topic you’d like me to address as part of this series?