[Bug 724463] New: stuttering with sync=false on sink when using a live source

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=724463
  GStreamer | gst-omx | unspecified

           Summary: stuttering with sync=false on sink when using a live
                    source
    Classification: Platform
           Product: GStreamer
           Version: unspecified
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-omx
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: erik at vontaene.de
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


Created an attachment (id=269278)
 --> (https://bugzilla.gnome.org/attachment.cgi?id=269278)
sample

I get a stuttering effect on my Raspberry Pi when I set sync=false on the
videosink when using a h264 live source, e.g. rtsp. The Pipeline displays a few
frames as fast as it can, waits a few seconds and displays the next frames.
This seems to correlate with the Intra frame interval.

The problem exists on gst-omx versions 1.0 and latest git.

Attached is a file that can be used to recreate the behavior, with the
following pipeline:

gst-launch-1.0 filesrc location=test.mkv ! matroskademux ! h264parse ! identity
sync=true ! omxh264dec ! aasink sync=false

I used an identiy element to "simulate" a live source. The behavior is the same
when using other sinks, like eglglessink.

Playback works fine on my PC with above pipeline, using omxh264dev instead of
avdec_h264.

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