Measure element latency

[Nicolas Dufresne]

Le jeudi 06 juin 2019 à 13:09 -0500, clubberlang a écrit :
> Hey,
> 
> Thanks for sharing!
> 
> For GStreamer Tracer, I will definitely checkout 1.16 version. But another
> problem is that, what if I only want latency metrics for a few elements (not
> for every element). Is there a way to specify?

You can pass parameters to tracers. It's not currently implemented, but
using the leaks tracer as inspiration, it could be:

  GST_TRACERS="latency(flags=element,filter=mycustomelement0+myotherlement0"

Now that question is how to do that in a speedy manner. Another way is
just to use "grep" or gst-debug-log-viewer to filter. I also have used
LibreOffice Calc importation (using the raw log) and then use a pivot
table.

> 
> For the buffer PTS, I didn't intend to use it as a timestamp, but more for
> identifying. But with the GstMeta approach, I don't really need PTS. I would
> insert a running time timestamp in the buffer before coming in to the
> element. And calculate a new one coming out of the buffer. The new timestamp
> - the inserted one would be the latency.
> 
> 
> 
> --
> Sent from: http://gstreamer-devel.966125.n4.nabble.com/
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