I have an MPEG-2 TS, containing MPEG-2 video at 720x576i, multicast over my LAN in raw UDP (no RTP wrapper), which I try to decode and deinterlace with the following pipeline:

gst-launch-1.0 udpsrc uri=udp://239.192.133.203:5000  ! tsdemux  ! mpegvideoparse ! vaapidecode ! vaapipostproc  ! vaapisink

This fails with current 0.5.8; vaapipostproc complains in gst_vaapipostproc_process_vpp (gstvaapipostproc.c:502) that postproc->filter_pool is NULL.

This also occurs with current git master as of commit b763fdac2cd621e10f0d44f56f8c245c378d0b22 [1]

I can stop the failure with the following diff, but I believe I then undo Gwenole's leak fix in commit 922a04b7347e56fcc8a517aa3f951de894a401b4 [2]

 $ git diff
diff --git a/gst/vaapi/gstvaapipostproc.c b/gst/vaapi/gstvaapipostproc.c
index f1be89c..3802023 100644
--- a/gst/vaapi/gstvaapipostproc.c
+++ b/gst/vaapi/gstvaapipostproc.c
@@ -280,7 +280,7 @@ gst_vaapipostproc_destroy_filter(GstVaapiPostproc *postproc)
         postproc->filter_ops = NULL;
     }
     gst_vaapi_filter_replace(&postproc->filter, NULL);
-    gst_vaapi_video_pool_replace(&postproc->filter_pool, NULL);
+//    gst_vaapi_video_pool_replace(&postproc->filter_pool, NULL);
 }
 
 static void

I'm going to see if I can work out a proper fix - I'm on IRC as "farnz" if you can see the problem and fix it before I post a patch.

[1] $ git show -s origin/master
commit b763fdac2cd621e10f0d44f56f8c245c378d0b22
Author: Gwenole Beauchesne <gwenole.beauchesne@intel.com>
Date:   Fri Jan 24 11:27:30 2014 +0100

    Bump version for development.

[2] $ git show -s 922a04b7347e56fcc8a517aa3f951de894a401b4
commit 922a04b7347e56fcc8a517aa3f951de894a401b4
Author: Gwenole Beauchesne <gwenole.beauchesne@intel.com>
Date:   Fri Nov 22 11:15:57 2013 +0100

    vaapostproc: fix memory leaks.
    
    Destroy VPP output surface pool on exit. Also avoid a possible crash
    in double-free situation caused by insufficiently reference counted
    array of formats returned during initialization.