[gstreamer-bugs] [Bug 529672] New: [videomixer] Big latency and bad framerate while mixing multiple live streams

[GStreamer (bugzilla.gnome.org)]

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  GStreamer | gst-plugins-good | Ver: 0.10.7
           Summary: [videomixer] Big latency and bad framerate while mixing
                    multiple live streams
           Product: GStreamer
           Version: 0.10.7
          Platform: Other
        OS/Version: All
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-plugins-good
        AssignedTo: gstreamer-bugs at lists.sourceforge.net
        ReportedBy: sakdean at gmail.com
         QAContact: gstreamer-bugs at lists.sourceforge.net
     GNOME version: 2.21/2.22
   GNOME milestone: Unspecified


Please describe the problem:
When mixing multiple live streams with non-live streams the output framerate is
inconsistent and a big latency gain (10s+ for QCIF output) is achieved.

Steps to reproduce:
1. 2 client machines: with pipeline: gst-launch videotestsrc ! ffmpegcolorspace
! videoscale ! video/x-raw-yuv,format=\(fourcc\)AYUV,width=176,height=144 !
ffmpegcolorspace ! ffenc_h263 ! rtph263pay ! udpsink port=some_port
host=mixer_host
2. on the mixer host side: gst-launch udpsrc port=some_port1 !
gstrtpjitterbuffer ! rtph263depay ! ffdec_h263 ! ffmpegcolorspace ! videoscale
! video/x-raw-yuv,format=\(fourcc\)AYUV,width=88,height=72 ! mix.
gst-launch udpsrc port=some_port1 ! gstrtpjitterbuffer ! rtph263depay !
ffdec_h263 ! ffmpegcolorspace ! videoscale !
video/x-raw-yuv,format=\(fourcc\)AYUV,width=176,height=144 ! mix.
videomixer name=mix. ! ffmpegcolorspce ! ximagesink



Actual results:
The output framerate is not smooth. Big latency gain.

Expected results:
The output video should be smooth, with as little latency as possible

Does this happen every time?
yes

Other information:


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