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It is now possible to update the currently used ntp-offset with a custom serialized downstream event. The element will read the ntp-offset property when doing the state transition from READY to PAUSED and use that offset until it receives a "GstNtpOffset" event, which also has a "ntp-offset" attribute in that it's structure. In case the property is not set and no event has been received, the element will guess the npt-offset with help of the clock. If no clock can be retrieved, the element will error out and stop the data flow. The same event is also used for updating the D/E-bits in the RTP extension header. The discont flag in a buffer can be set whenver a live/network source looses a frame, but that is not the type of discontinuity that the onvif extension header should reflect. The header is mainly used for playback of a track concept, in which gaps can be present, and it's those kind of gaps that should be highlighted with the D- and E-bits. https://bugzilla.gnome.org/show_bug.cgi?id=757688 |
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