Writing a Manager
Managers are elements that add a function or unify the function of
another (series of) element(s). Managers are generally a
one or more ghostpads. Inside them is/are the actual element(s) that
matters. There is several cases where this is useful. For example:
To add support for private events with custom event handling to another element.
To add support for custom pad
_convert ()handling to another element.
To add custom data handling before or after another element's data handler function (generally its
To embed an element, or a series of elements, into something that looks and works like a simple element to the outside world. This is particular handy for implementing sources and sink elements with multiple pads.
Making a manager is about as simple as it gets. You can derive from a
GstBin, and in most cases, you can embed the required elements in the
_init () already, including setup of ghostpads. If you need any custom
data handlers, you can connect signals or embed a second element which
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