[Bug 796803] New: vaapi: two cases fail during doing csc with iHD driver

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=796803

            Bug ID: 796803
           Summary: vaapi: two cases fail during doing csc with iHD driver
    Classification: Platform
           Product: GStreamer
           Version: git master
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gstreamer-vaapi
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: zhanjunx.wang at intel.com
        QA Contact: gstreamer-bugs at lists.freedesktop.org
                CC: bsreerenj at gmail.com, vjaquez at igalia.com
     GNOME version: ---

Test Env:
============================================
Platform:               APL/SKL
Arch:                  x86_64
Kernel:            4.16.0
libva            commit b3be72a5a110880f70626d7c3bed953cdde124b2
media_driver        commit 4a85bb18ecc9a18b7cf592d405c8c2fa1c7aad06
gstreamer               master branch 9722e896446ed052623d795d8511140fbca7f023
gst-vaapi         master branch f5eb4faa5914f3745820e557ac2401a7d738be66

Reproduce Steps:
============================================
1. build enc as above lists
2. gst-launch-1.0 filesrc
location=/media//encoderbitstreams/gstvpp//768x480.I420 '!' videoparse
format=i420 width=768 height=480 framerate=1 '!' videoconvert '!'
video/x-raw,format=NV12 '!' vaapipostproc format=7 '!' videoconvert '!'
video/x-raw,format=I420 '!' checksumsink2 frame-checksum=false dump-output=true
dump-location=cscrgbx.I420
3. error message
0:00:00.127384980  9391       0xfa59e0 ERROR       vaapivideomemory
gstvaapivideomemory.c:736:gst_video_info_update_from_surface: Cannot create a
VA derived image from surface 0x7f8f84002c00

or 
gst-launch-1.0 filesrc location=/media//encoderbitstreams/gstvpp//768x480.I420
'!' videoparse format=i420 width=768 height=480 framerate=1 '!' videoconvert
'!' video/x-raw,format=NV12 '!' vaapipostproc format=3 '!' videoconvert '!'
video/x-raw,format=I420 '!' checksumsink2 frame-checksum=false dump-output=true
dump-location=cscyv12.I420
this case will core dumped probably(failure rate: 2/10)

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