[Bug 771507] New: [gst-vaapi-master][vp9][encoder] reference Mode 1 produces blocky pixels content

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=771507

            Bug ID: 771507
           Summary: [gst-vaapi-master][vp9][encoder] reference Mode 1
                    produces blocky pixels content
    Classification: Platform
           Product: GStreamer
           Version: 1.9.2
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gstreamer-vaapi
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: dcharlesm at gmail.com
        QA Contact: gstreamer-bugs at lists.freedesktop.org
                CC: bsreerenj at gmail.com, vjaquez at igalia.com
     GNOME version: ---

This pipeline produces blocky pixels content. Analyzing the output it is losing
the proper reference frame at the 8th frame. 

gst-launch-1.0 -e filesrc location=./someyuv_1920x1080.I420 blocksize=3110400 !
video/x-raw, format=I420, width=1920, height=1080, framerate=30/1,
pixel-aspect-ratio=1/1 ! y4menc ! y4mdec ! vaapivp9enc rate-control=cqp
keyframe-period=300 ref-pic-mode=1  ! webmmux ! filesink
location=./gstvp9enc_2Mbps_mode1ref.webm

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