Writing a Plugin

You are now ready to learn how to build a plugin. In this part of the guide, you will learn how to apply basic GStreamer programming concepts to write a simple plugin. The previous parts of the guide have contained no explicit example code, perhaps making things a bit abstract and difficult to understand. In contrast, this section will present both applications and code by following the development of an example audio filter plugin called “MyFilter”.

The example filter element will begin with a single input pad and a single output pad. The filter will, at first, simply pass media and event data from its sink pad to its source pad without modification. But by the end of this part of the guide, you will learn to add some more interesting functionality, including properties and signal handlers. And after reading the next part of the guide, Advanced Filter Concepts, you will be able to add even more functionality to your plugins.

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