Screen Recorder

GitHub Repository

META Screen Recorder

Standard and high resolution

Last modification on 4th May 2020 at 14:43 GMT+4


Why a new screen recorder?

Are you developing a new game? Are you proud of your new creation and want to demonstrate it without further delay on Discord or on the gamebuino.com website? You will probably want to create an animated GIF to show your masterpiece to the whole community

The Gamebuino META has two built-in tools that allow you to take screenshots and screen recordings. These tools are directly accessible via the Home button. What interests us here is the video capture:

Native screen recording

The tool provided with the META is very useful, certainly… nevertheless it is quite limited and above all extremely binding!

  • Limited because it does not allow to record a screen capture of an application developed for high resolution (160x128 pixels). Only the standard resolution (80x64 pixels) is supported. Recording in standard resolution can be started by interrupting your application to open the menu accessible by the Home button, which is inconvenient. However, you can trigger it by inserting appropriate instructions into your code.

  • Binding because the capture tool saves a file in GMV format… which is very lightweight, but not readable in a web browser. So you can’t do anything with it as it is. Soru has developed a small utility that allows you to convert this GMV file into an animated GIF. But you will have to get the GMV file from the microSD card before you can convert it… For those who have already done the exercise, you will admit that these manipulations can drive you crazy when you do it again 10 times to get a recording that suits you!

This naturally led me to develop a small utility that meets my needs:

  • Simpler and faster to use.
  • More flexible in that I can now trigger or stop recording in multiple ways: either by simply pressing a button, or directly in my code at a specific time, or when certain events occur. In addition, once the recording has been done, I can still rework the screenshots, or even delete unnecessary screens, before generating my animated GIF.
  • More advanced since I can now access high resolution.

What are the implementation requirements?

  Beginner Intermediary Advanced Expert
Required level     

To be able to install and use this tool under the best conditions, you must:

  • know the basics of the shell of your OS,
  • master the basic concepts of the C++ language,
  • have successfully completed the Academy’s Hello World! workshop,
  • for high resolution: read the article High Resolution without gb.display.

Owning a Gamebuino META is obviously essential to be able to record the screen.

Finally, to be able to run this utility and create animated GIFs, you will need the following free software on your computer:

  • PHP 7.x for CLI (Command Line Interface), i.e. accessible from your shell,
  • ImageMagick, which includes a library and a set of command line utilities to create, convert, edit and display images in a wide variety of formats.
© 2018-2020 Stéphane Calderoni