[Bug 788200] New: New element: gstproxy that proxies buffers, events, and caps to separate pipeline

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=788200

            Bug ID: 788200
           Summary: New element: gstproxy that proxies buffers, events,
                    and caps to separate pipeline
    Classification: Platform
           Product: GStreamer
           Version: git master
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: Normal
         Component: gst-plugins-bad
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: nirbheek.chauhan at gmail.com
        QA Contact: gstreamer-bugs at lists.freedesktop.org
                CC: dv at pseudoterminal.org
     GNOME version: ---

Created attachment 360468
  --> https://bugzilla.gnome.org/attachment.cgi?id=360468&action=edit
New element "proxy"

This plugin is useful when you want to pipe arbitrary data to a different
pipeline within the same process. Some advantages over appsink/appsrc or the
inter elements:

* Ease of use. Buffers, events, and caps are transmitted as-is without copying
or serialization.
* Enables zerocopy (especially DMABUF)
* Enables usage with sinks or elements that are unreliable and may throw errors
and need re-initialization, such as a network sink, a USB device sink (v4l2),
etc
* Transmits arbitrary data, not just audio/video/subs
* Can implement 1 producer pipeline -> N dynamic consumer pipelines within a
single process when combined with the `tee` element

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