Creates a missing-plugin message for element to notify the application that a source element for a particular URI protocol is missing. This function is mainly for use in plugins.
the #GstElement posting the message
the URI protocol the missing source needs to implement, e.g. "http" or "mms"
a new #GstMessage
Creates a missing-plugin message for element to notify the application that a source element for a particular URI protocol is missing. This function is mainly for use in plugins.