diff --git a/gst-libs/gst/codecparsers/gstmpegvideometa.c b/gst-libs/gst/codecparsers/gstmpegvideometa.c
index f7b2f87e75..d5d5f0a102 100644
--- a/gst-libs/gst/codecparsers/gstmpegvideometa.c
+++ b/gst-libs/gst/codecparsers/gstmpegvideometa.c
@@ -37,6 +37,7 @@ gst_mpeg_video_meta_init (GstMpegVideoMeta * mpeg_video_meta,
   mpeg_video_meta->pichdr = NULL;
   mpeg_video_meta->picext = NULL;
   mpeg_video_meta->quantext = NULL;
+  mpeg_video_meta->num_slices = mpeg_video_meta->slice_offset = 0;
 
   return TRUE;
 }
diff --git a/sys/applemedia-nonpublic/coremediabuffer.c b/sys/applemedia-nonpublic/coremediabuffer.c
index a8136ba4ba..bec604ac90 100644
--- a/sys/applemedia-nonpublic/coremediabuffer.c
+++ b/sys/applemedia-nonpublic/coremediabuffer.c
@@ -19,6 +19,19 @@
 
 #include "coremediabuffer.h"
 
+static gboolean
+gst_core_media_meta_init (GstCoreMediaMeta * meta, gpointer params,
+    GstBuffer * buf)
+{
+  meta->ctx = NULL;
+  meta->sample_buf = NULL;
+  meta->image_buf = NULL;
+  meta->pixel_buf = NULL;
+  meta->block_buf = NULL;
+
+  return TRUE;
+}
+
 static void
 gst_core_media_meta_free (GstCoreMediaMeta * meta, GstBuffer * buf)
 {
@@ -52,7 +65,7 @@ gst_core_media_meta_get_info (void)
   if (g_once_init_enter (&core_media_meta_info)) {
     const GstMetaInfo *meta = gst_meta_register (GST_CORE_MEDIA_META_API_TYPE,
         "GstCoreMediaMeta", sizeof (GstCoreMediaMeta),
-        (GstMetaInitFunction) NULL,
+        (GstMetaInitFunction) gst_core_media_meta_init,
         (GstMetaFreeFunction) gst_core_media_meta_free,
         (GstMetaTransformFunction) NULL);
     g_once_init_leave (&core_media_meta_info, meta);
diff --git a/sys/applemedia-nonpublic/corevideobuffer.c b/sys/applemedia-nonpublic/corevideobuffer.c
index 072fe6bd21..26b5643660 100644
--- a/sys/applemedia-nonpublic/corevideobuffer.c
+++ b/sys/applemedia-nonpublic/corevideobuffer.c
@@ -19,6 +19,17 @@
 
 #include "corevideobuffer.h"
 
+static gboolean
+gst_core_video_meta_init (GstCoreVideoMeta * meta, gpointer params,
+    GstBuffer * buf)
+{
+  meta->ctx = NULL;
+  meta->cvbuf = NULL;
+  meta->pixbuf = NULL;
+
+  return TRUE;
+}
+
 static void
 gst_core_video_meta_free (GstCoreVideoMeta * meta, GstBuffer * buf)
 {
@@ -54,7 +65,7 @@ gst_core_video_meta_get_info (void)
   if (g_once_init_enter (&core_video_meta_info)) {
     const GstMetaInfo *meta = gst_meta_register (GST_CORE_VIDEO_META_API_TYPE,
         "GstCoreVideoMeta", sizeof (GstCoreVideoMeta),
-        (GstMetaInitFunction) NULL,
+        (GstMetaInitFunction) gst_core_video_meta_init,
         (GstMetaFreeFunction) gst_core_video_meta_free,
         (GstMetaTransformFunction) NULL);
     g_once_init_leave (&core_video_meta_info, meta);
diff --git a/sys/applemedia/coremediabuffer.c b/sys/applemedia/coremediabuffer.c
index cf34224d86..4938939adf 100644
--- a/sys/applemedia/coremediabuffer.c
+++ b/sys/applemedia/coremediabuffer.c
@@ -48,6 +48,19 @@ gst_core_media_meta_add (GstBuffer * buffer, CMSampleBufferRef sample_buf,
     meta->pixel_buf = NULL;
 }
 
+static gboolean
+gst_core_media_meta_init (GstCoreMediaMeta * meta, gpointer params,
+    GstBuffer * buf)
+{
+  meta->ctx = NULL;
+  meta->sample_buf = NULL;
+  meta->image_buf = NULL;
+  meta->pixel_buf = NULL;
+  meta->block_buf = NULL;
+
+  return TRUE;
+}
+
 static void
 gst_core_media_meta_free (GstCoreMediaMeta * meta, GstBuffer * buf)
 {
@@ -99,7 +112,7 @@ gst_core_media_meta_get_info (void)
   if (g_once_init_enter (&core_media_meta_info)) {
     const GstMetaInfo *meta = gst_meta_register (GST_CORE_MEDIA_META_API_TYPE,
         "GstCoreMediaMeta", sizeof (GstCoreMediaMeta),
-        (GstMetaInitFunction) NULL,
+        (GstMetaInitFunction) gst_core_media_meta_init,
         (GstMetaFreeFunction) gst_core_media_meta_free,
         (GstMetaTransformFunction) gst_core_media_meta_transform);
     g_once_init_leave (&core_media_meta_info, meta);
diff --git a/sys/applemedia/corevideobuffer.c b/sys/applemedia/corevideobuffer.c
index 67d899c1c8..a1530a170d 100644
--- a/sys/applemedia/corevideobuffer.c
+++ b/sys/applemedia/corevideobuffer.c
@@ -33,6 +33,17 @@ gst_core_video_meta_add (GstBuffer * buffer, CVBufferRef cvbuf)
   meta->pixbuf = (CVPixelBufferRef) cvbuf;
 }
 
+static gboolean
+gst_core_video_meta_init (GstCoreVideoMeta * meta, gpointer params,
+    GstBuffer * buf)
+{
+  meta->ctx = NULL;
+  meta->cvbuf = NULL;
+  meta->pixbuf = NULL;
+
+  return TRUE;
+}
+
 static void
 gst_core_video_meta_free (GstCoreVideoMeta * meta, GstBuffer * buf)
 {