OS X: Is there an open source screen recorder?

Solution 1:

You've answered your own question, but I thought I would flesh it out a bit.

You are correct that QuickTime will record a window, or the whole screen, but it only does so with the version of QT that ships with Lion. It wasn't available in earlier versions of QT or OS X (I'm not sure if the latest QT would do this on an older OS - I don't have one to try it on.)

I was pleasantly surprised to see that it now had that functionality - there really aren't any other free or low cost options.

Solution 2:

Kap is a great option. Recently (January 3, 2017) they hit version 1.0.0.

Its great features include:

• Export to Gif, WebM, MP4
• Audio recording
• Hiding the mouse cursor and highlighting clicks
• Record a portion of your screen with a custom size and aspect ratio
• "High" FPS recording