[Bug 700747] New: rtsp-sdp: Parse framerate and optional framesize attribute from payloaded caps and put in SDP

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=700747
  GStreamer | gst-rtsp-server | git

           Summary: rtsp-sdp: Parse framerate and optional framesize
                    attribute from payloaded caps and put in SDP
    Classification: Platform
           Product: GStreamer
           Version: git
        OS/Version: All
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: Normal
         Component: gst-rtsp-server
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: sebras at hotmail.com
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


RFC4566 (http://tools.ietf.org/html/rfc4566) describes on page 30 in chapter 6
an SDP attribute that tells an RTSP-client what framerate to expect before the
video stream is started.

RFC6064 (http://tools.ietf.org/html/rfc6064) describes on page 6 in chapter 4.2
an SDP attribute that describes to an RTSP-client the dimensions of the video
stream before it is started.

The attached patches add code to parse SDP attribute values from the payloaded
caps and add the relevant SDP attributes to the SDP itself. gstrtpjpegdepay
already stored an SDP attribute value in a caps field named "a-framerate", so
the proposed patches follows the same pattern.

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