Thx for the answer. Can I simply inherit from GstBaseTransform and use the tracked segment from it since it keeps a copy of it ? <div class="gmail_quote">Le 12 janv. 2016 12:25 AM, "Nicolas Dufresne" <<a href="mailto:nicolas.dufresne@collabora.com">nicolas.dufresne@collabora.com</a>> a écrit : <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Le lundi 11 janvier 2016 à 23:24 +0100, Florian Langlois a écrit : > Hello, > For a project I need to insert UTC timestamps into a h.264 stream > using the MISB ST 604. > I also need to insert Commercial precision timestamp detailled in the > same MISB. > Frames are captured from a live source v4l2src then encoded using an > imx6 encoder and send with a udpsink. > Before to start I want to know if someone here has any idea of what > would be a good pipeline architecture for that ? > I wanted to develop a dedicated plugin for that but i dont know how > to get correct UTC timestamp ? Do such a gstclock exist ? > Thx > Florian You can grab the system clock and set the clock-type property to GST_CLOCK_TYPE_REALTIME (instead of default which is GST_CLOCK_TYPE_MONOTONIC). Then you need to force your pipeline into using that clock, see gst_pipeline_use_clock() method. Note that to convert the buffer timestamp into clock time (UTC time), you will have to track the GstSegment structure from the segment event, convert the timestamp to running-time and add the pipeline base time (gst_element_get_base_time(pipeline)). cheers, Nicolas _______________________________________________ gstreamer-devel mailing list <a href="mailto:gstreamer-devel@lists.freedesktop.org">gstreamer-devel@lists.freedesktop.org</a> <a href="http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" rel="noreferrer" target="_blank">http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a> </blockquote></div>