roundrobin usage

[Nicolas Dufresne]

Le lun. 10 févr. 2020 07 h 15, Yair Reshef <yair99 at gmail.com> a écrit :

> hi,
> i have single thread decoder plugin
> i would like to use round robin plugin to send a timestamped src to the 3
> different decoder instances.
>
>
> 1. am i thinking about this wrong? should queue handle this in some why?
>

If your decoder can handle random frames, yes, it's possible to add
parallel processing this way (e.g. would work with PNG or jpeg). Would
require: roundrobin, then a queue after each pads, though we are missing an
element to close the loop, we need funnel, but with synchronization so that
buffers comes out in order. That would be a nice addition, and like
roundrobin should be very simple.

2. how do i use the roundrobin plugin, as its described as a "reverse of
> tee"
>

Now that you highlight this, I need to rework that doc. Reverse of tee is
funnel, roundrobin is like tee, 1 to N, but sends each buffer to one pad,
were tee sends buffer to all pads.



> gst-launch-1.0 -v videotestsrc ! roundrobin name=s ! fpsdisplaysink s. !
> fpsdisplaysink s. ! fpsdisplaysink
>
> "This is a generic element that will distribute equally incoming buffers
> over multiple src pads. This is the opposite of tee element, which
> duplicates buffers over all pads. This element can be used to distrute load
> across multiple branches when the buffer can be processed independently."
>
> note: ubuntu's stock 1.14.5 gst build doesnt show it. but gst-build
> exposed it.
>

roundrobin element was added in current development phase, so will be
available in next stable release (1.18). It's a trivial element, feel free
to copy into your project if LGPL is compatible. It's part of
-bad/gst/rist, as this is the only usage inside GStreamer for now.


>
> https://gstreamer.freedesktop.org/documentation/rist/roundrobin.html?gi-language=c
> _______________________________________________
> gstreamer-devel mailing list
> gstreamer-devel at lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/gstreamer-devel/attachments/20200210/67c2ef93/attachment.htm>