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Sebastian Dröge authored
This works around a bug in various ONVIF cameras that implement the attributes the wrong way around. They still won't work with a backchannel but at least normal playback will work for the time being. It restores pre-1.14 behaviour where we would fail to preroll on any SDP that lists a recvonly stream. For 1.16 a better solution should be found. The problem here is that the ONVIF spec has the meaning of the two attributes the wrong way around in the examples, compared to RFC4566. https://bugzilla.gnome.org/show_bug.cgi?id=793715
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