[Bug 705108] New: Add a config-interval property to rtpgstpay

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=705108
  GStreamer | gst-plugins-good | git

           Summary: Add a config-interval property to rtpgstpay
    Classification: Platform
           Product: GStreamer
           Version: git
        OS/Version: All
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: Normal
         Component: gst-plugins-good
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: youness.alaoui at collabora.co.uk
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


When we use rtpgstpay/rtpgstdepay, sometimes the inlined caps will be lost
(lost packet or new client joining mid-stream, for example), so there is a need
to retransmit the caps as well as the tags at a regular interval.
I've added a config-interval property (similar to rtph264pay) to rtpgstpay that
will retransmit the caps and tags to the client at a regular interval. By
default, the interval is set to 0 (disabled) so there is no change in behavior.
Some small refactoring was needed for this implementation, and also, rtpgstpay
will now merged the tags it receives (similar to what audiobasedecoder will do)
in order to resend the full tags.
The GST_EVENT_STREAM_START is now also being payloaded as it is needed to
detect when tags need to be flushed on the receiver end, in case we switch
sources mid stream.
You will find the patches that implement this feature here :
http://cgit.collabora.com/git/user/kakaroto/gst-plugins-good.git/log/?h=rtppay
Please review/merge.

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