Gst.PadProbeCallback?

[pisymbol .]

I am adding a probe to my src to do per frame timetamping/gps tagging.
Adding the pad is easy, but what are the arguments to this callback?

Line of code:

self.nvcam0_pad.add_probe(Gst.PadProbeType.BUFFER, self.on_probe, None,
None)

Doc (to show I care!):

https://gstreamer.freedesktop.org/documentation/gstreamer/gstpad.html?gi-language=python#GstPadProbeCallback

...says there are three. But the interpreter claims there are five? What
are the five and does the doc need updating?

Thanks!
-
aps
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