[Bug 797369] New: playback through gst-msdk: there is obvious performance gap by gst-plugins-bad 1.14.x comparing master 1.15.x

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=797369

            Bug ID: 797369
           Summary: playback through gst-msdk: there is obvious
                    performance gap by gst-plugins-bad 1.14.x comparing
                    master 1.15.x
    Classification: Platform
           Product: GStreamer
           Version: 1.14.x
                OS: Linux
            Status: NEW
          Severity: critical
          Priority: Normal
         Component: gst-plugins-bad
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: long1.wang at intel.com
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

For 1080p60fps samples:
gst-launch-1.0 -v filesrc location=1080p60fps.h264 ! h264parse ! msdkh264dec !
fpsdisplaysink video-sink=glimagesink sync=false | grep dropped
it only showes 35.xx fps, which is far away to the target 60 fps.
2.2)4K 30fps samples:
gst-launch-1.0 -v filesrc location=4k30fps.h264 ! h264parse ! msdkh264dec !
fpsdisplaysink video-sink=glimagesink sync=false | grep dropped
it only showes 9.x fps, which is far away to the target 30fps.

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