For those developers of you wanting to do more than just develop under Linux, you'll have realized that there are many things stopping you for doing proper video tutorials as easily as you would do it with some non-free (as in freedom) software. Fear not, though, as this tutorial, written at a time between Ubuntu 14.04 and 14.10 with the Gnome Shell, will help you go through it and hopefully setup a perfect environment that you will be able to re-use anytime, anywhere (with your laptop).
YouTube requirementsIn order to prepare a good video tutorial, the first thing you need is: standards! You need to get a clear list of what you will record, in which size, which quality and which destination. A common destination for video tutorials is YouTube, and as explained by @JanetRichard in this article, and combined with what you have natively in Ubuntu, you might be deciding for these:
- Video format/CODEC: MPEG-4
- Aspect ratio: 16:9
- Resolution: 1280 x 720 (16x9 HD)
- Audio CODEC: MP3 or OGA (from OGG)
- Audio bitrate: 44kHz
- Channels: 2
Screen recorderThe first tool you will need is a simple, efficient screen recorder. For those who knew stuff like Kazam and other screen recorders, you might have had issues with their latest versions. SimpleScreenRecorder is a well-maintained little GTK application developed by Maarten Baert. By clicking the link, you will get to the Github page that contains detailed (but simple) installation instructions. Note: for Ubuntu 14.10 and above, you might be better off following the instructions on Maarten Baert's website: http://www.maartenbaert.be/simplescreenrecorder/#download Start SimpleScreenCaster, set the parameters to the ones suggested above (including resolution), pick a destination file and... start recording.
Sound qualityOne of the most essential items of a good screencast (considering recording your screen will give you extremely good image quality anyway) is sound quality. If you are going to explain stuff to your public, you don't want noise/echo/low volume issues anywhere near your screencast. Laptop microphones are usually good quality, but they are omnidirectional, which means they will catch your cat mauwing 6 meters from you, or the rain hitting on your window. You need a microphone that is built for recording one single voice (or at least focused on that). I personally use a USB Behringer C-1U, which cost me about US$60 delivered at my home. Check my article explaining how to get past the low volume issue. With this setup, you should get a crisp sound quality focused on your mouth. Oh, and this microphone doesn't have a base, so I hacked and cut an old plastic CD tower for 50 CDs and screwed the microphone in there, which works just fine.
Embedding webcamIf you want to embed your webcam inside the screencast, you'll have to use the command line a bit, because SimpleScreenRecorder doesn't allow it directly, but it will focus its recording on the area you define, so you can just include a small webcam feed into this area and you're done. Check my article on how to do that. Shorthand: use mplayer with the command:
mplayer tv:// -tv driver=v4l2:width=640:height=480 -vo xv
[…] A continuación te presento la herramienta: SimpleScreenRecorder pero funciona con Linux aquí explica paso a paso como instalarlo. […]