[Bug 746080] v4l2: enumerate output ports and add a property to select input/output

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=746080

--- Comment #6 from Aurélien Zanelli <aurelien.zanelli at parrot.com> ---
(In reply to Aurélien Zanelli from comment #4)
> (In reply to Nicolas Dufresne (stormer) from comment #3)
> > know if this list may change dynamicilly ? Also, to swith input/output, do
> > one need to stop streaming and renegotiate the format ?
> According to the spec, it is related to physical connectors so I think it
> can't change dynamically, but we may ask for confirmation in LinuxMedia ML. 

Question has been asked in LinuxMediaML. Answer is that list is fixed even if
the spec doesn't explicitely forbid it. Dynamic list is not allowed at the
moment.

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