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I’m trying to write a simple command line audio player using the Python Gstreamer bindings.
Is there a function in the gstreamer API that determines in advance whether or not a particular file (URI) can be decoded and played by the currently installed set of codecs?
I guess you can try to play it and see if that raises any error – in fact, there’s no way to know the set of codecs necessary without opening the file. Some distributions even have hooks in place that ask the user to download the right codec when you start playing something.