UTC timestamp into H.264 stream

[Florian Langlois]

Thx for the answer.

Can I simply inherit from GstBaseTransform and use the tracked segment from
it since it keeps a copy of it ?
Le 12 janv. 2016 12:25 AM, "Nicolas Dufresne" <
nicolas.dufresne at collabora.com> a écrit :

> 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
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