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That doesn't make sense. Either the parameter is completely useless or it is actually used in some way. If I pass in a pointer to a float[], it can't possibly be used in the same way as if I were to pass in a pointer to a single int or a string or something else entirely.

Thanks for your response. Is this what you mean by the LibVLC Doxygen? Or is there a different section I should be looking at? Can you please explain or point me to somewhere that explains what an opaque data pointer actually is? If it doesn't come in as floats, should I marshal it as bytes or ints ...

I'm using ffmpeg to stream video and audio from a WebCam over a network then using a modified version of Hyper VLC (a C# wrapper around LibVLC) to get it into Unity . After a bit of work I've managed to get the video working well, but HyperVLC doesn't handle audio so I'm trying to add it myself and ...