diff --git a/subprojects/gst-plugins-bad/ext/ttml/gstttmlrender.c b/subprojects/gst-plugins-bad/ext/ttml/gstttmlrender.c
index 82db24cfd1..393258dcac 100644
--- a/subprojects/gst-plugins-bad/ext/ttml/gstttmlrender.c
+++ b/subprojects/gst-plugins-bad/ext/ttml/gstttmlrender.c
@@ -273,7 +273,7 @@ gst_ttml_render_class_init (GstTtmlRenderClass * klass)
   gstelement_class->change_state =
       GST_DEBUG_FUNCPTR (gst_ttml_render_change_state);
 
-  klass->pango_lock = g_slice_new (GMutex);
+  klass->pango_lock = g_new (GMutex, 1);
   g_mutex_init (klass->pango_lock);
 }
 
@@ -1228,7 +1228,7 @@ gst_ttml_render_draw_rectangle (guint width, guint height,
 static void
 gst_ttml_render_char_range_free (CharRange * range)
 {
-  g_slice_free (CharRange, range);
+  g_free (range);
 }
 
 
@@ -1301,7 +1301,7 @@ gst_ttml_render_unified_element_free (UnifiedElement * unified_element)
 
   gst_subtitle_element_unref (unified_element->element);
   g_free (unified_element->text);
-  g_slice_free (UnifiedElement, unified_element);
+  g_free (unified_element);
 }
 
 
@@ -1313,7 +1313,7 @@ gst_ttml_render_unified_element_copy (const UnifiedElement * unified_element)
   if (!unified_element)
     return NULL;
 
-  ret = g_slice_new0 (UnifiedElement);
+  ret = g_new0 (UnifiedElement, 1);
   ret->element = gst_subtitle_element_ref (unified_element->element);
   ret->pango_font_size = unified_element->pango_font_size;
   ret->pango_font_metrics.height = unified_element->pango_font_metrics.height;
@@ -1334,7 +1334,7 @@ gst_ttml_render_unified_block_free (UnifiedBlock * unified_block)
   gst_subtitle_style_set_unref (unified_block->style_set);
   g_ptr_array_unref (unified_block->unified_elements);
   g_free (unified_block->joined_text);
-  g_slice_free (UnifiedBlock, unified_block);
+  g_free (unified_block);
 }
 
 
@@ -1358,7 +1358,7 @@ gst_ttml_render_unified_block_copy (const UnifiedBlock * block)
   if (!block)
     return NULL;
 
-  ret = g_slice_new0 (UnifiedBlock);
+  ret = g_new0 (UnifiedBlock, 1);
   ret->joined_text = g_strdup (block->joined_text);
   ret->style_set = gst_subtitle_style_set_ref (block->style_set);
   ret->unified_elements = g_ptr_array_new_with_free_func ((GDestroyNotify)
@@ -1485,7 +1485,7 @@ static UnifiedBlock *
 gst_ttml_render_unify_block (GstTtmlRender * render,
     const GstSubtitleBlock * block, GstBuffer * buf)
 {
-  UnifiedBlock *ret = g_slice_new0 (UnifiedBlock);
+  UnifiedBlock *ret = g_new0 (UnifiedBlock, 1);
   guint i;
 
   ret->unified_elements = g_ptr_array_new_with_free_func ((GDestroyNotify)
@@ -1495,7 +1495,7 @@ gst_ttml_render_unify_block (GstTtmlRender * render,
 
   for (i = 0; i < gst_subtitle_block_get_element_count (block); ++i) {
     gchar *text;
-    UnifiedElement *ue = g_slice_new0 (UnifiedElement);
+    UnifiedElement *ue = g_new0 (UnifiedElement, 1);
     ue->element =
         gst_subtitle_element_ref (gst_subtitle_block_get_element (block, i));
     ue->pango_font_size =
@@ -1584,7 +1584,7 @@ gst_ttml_render_get_line_char_ranges (GstTtmlRender * render,
 
   /* Handle hard breaks in block text. */
   while (start_index < strlen (block->joined_text)) {
-    CharRange *range = g_slice_new0 (CharRange);
+    CharRange *range = g_new0 (CharRange, 1);
     gchar *c = block->joined_text + start_index;
     while (*c != '\0' && *c != '\n')
       ++c;
@@ -1647,7 +1647,7 @@ gst_ttml_render_get_line_char_ranges (GstTtmlRender * render,
         end_index = gst_ttml_render_get_nearest_breakpoint (block, end_index);
 
         if (end_index > range->first_index) {
-          new_range = g_slice_new0 (CharRange);
+          new_range = g_new0 (CharRange, 1);
           new_range->first_index = end_index + 1;
           new_range->last_index = range->last_index;
           GST_CAT_LOG (ttmlrender_debug,
@@ -2279,7 +2279,7 @@ gst_ttml_render_rendered_image_new (GstBuffer * image, gint x, gint y,
 {
   GstTtmlRenderRenderedImage *ret;
 
-  ret = g_slice_new0 (GstTtmlRenderRenderedImage);
+  ret = g_new0 (GstTtmlRenderRenderedImage, 1);
 
   ret->image = image;
   ret->x = x;
@@ -2301,7 +2301,7 @@ gst_ttml_render_rendered_image_new_empty (void)
 static inline GstTtmlRenderRenderedImage *
 gst_ttml_render_rendered_image_copy (GstTtmlRenderRenderedImage * image)
 {
-  GstTtmlRenderRenderedImage *ret = g_slice_new0 (GstTtmlRenderRenderedImage);
+  GstTtmlRenderRenderedImage *ret = g_new0 (GstTtmlRenderRenderedImage, 1);
 
   ret->image = gst_buffer_ref (image->image);
   ret->x = image->x;
@@ -2319,7 +2319,7 @@ gst_ttml_render_rendered_image_free (GstTtmlRenderRenderedImage * image)
   if (!image)
     return;
   gst_buffer_unref (image->image);
-  g_slice_free (GstTtmlRenderRenderedImage, image);
+  g_free (image);
 }
 
 
@@ -2343,7 +2343,7 @@ gst_ttml_render_rendered_image_combine (GstTtmlRenderRenderedImage * image1,
   if (image2 && !image1)
     return gst_ttml_render_rendered_image_copy (image2);
 
-  ret = g_slice_new0 (GstTtmlRenderRenderedImage);
+  ret = g_new0 (GstTtmlRenderRenderedImage, 1);
 
   /* Work out dimensions of combined image. */
   ret->x = MIN (image1->x, image2->x);
@@ -2429,7 +2429,7 @@ gst_ttml_render_rendered_image_crop (GstTtmlRenderRenderedImage * image,
     return NULL;
   }
 
-  ret = g_slice_new0 (GstTtmlRenderRenderedImage);
+  ret = g_new0 (GstTtmlRenderRenderedImage, 1);
 
   ret->x = MAX (image->x, x);
   ret->y = MAX (image->y, y);
diff --git a/subprojects/gst-plugins-bad/ext/ttml/subtitle.c b/subprojects/gst-plugins-bad/ext/ttml/subtitle.c
index 38d442d983..f815f0563b 100644
--- a/subprojects/gst-plugins-bad/ext/ttml/subtitle.c
+++ b/subprojects/gst-plugins-bad/ext/ttml/subtitle.c
@@ -44,7 +44,7 @@ _gst_subtitle_style_set_free (GstSubtitleStyleSet * style_set)
 {
   g_return_if_fail (style_set != NULL);
   g_free (style_set->font_family);
-  g_slice_free (GstSubtitleStyleSet, style_set);
+  g_free (style_set);
 }
 
 GST_DEFINE_MINI_OBJECT_TYPE (GstSubtitleStyleSet, gst_subtitle_style_set);
@@ -59,7 +59,7 @@ GST_DEFINE_MINI_OBJECT_TYPE (GstSubtitleStyleSet, gst_subtitle_style_set);
 GstSubtitleStyleSet *
 gst_subtitle_style_set_new (void)
 {
-  GstSubtitleStyleSet *ret = g_slice_new0 (GstSubtitleStyleSet);
+  GstSubtitleStyleSet *ret = g_new0 (GstSubtitleStyleSet, 1);
   GstSubtitleColor white = { 255, 255, 255, 255 };
   GstSubtitleColor transparent = { 0, 0, 0, 0 };
 
@@ -88,7 +88,7 @@ _gst_subtitle_element_free (GstSubtitleElement * element)
 {
   g_return_if_fail (element != NULL);
   gst_subtitle_style_set_unref (element->style_set);
-  g_slice_free (GstSubtitleElement, element);
+  g_free (element);
 }
 
 GST_DEFINE_MINI_OBJECT_TYPE (GstSubtitleElement, gst_subtitle_element);
@@ -113,7 +113,7 @@ gst_subtitle_element_new (GstSubtitleStyleSet * style_set,
 
   g_return_val_if_fail (style_set != NULL, NULL);
 
-  element = g_slice_new0 (GstSubtitleElement);
+  element = g_new0 (GstSubtitleElement, 1);
   gst_mini_object_init (GST_MINI_OBJECT_CAST (element), 0,
       gst_subtitle_element_get_type (), NULL, NULL,
       (GstMiniObjectFreeFunction) _gst_subtitle_element_free);
@@ -131,7 +131,7 @@ _gst_subtitle_block_free (GstSubtitleBlock * block)
   g_return_if_fail (block != NULL);
   gst_subtitle_style_set_unref (block->style_set);
   g_ptr_array_unref (block->elements);
-  g_slice_free (GstSubtitleBlock, block);
+  g_free (block);
 }
 
 GST_DEFINE_MINI_OBJECT_TYPE (GstSubtitleBlock, gst_subtitle_block);
@@ -154,7 +154,7 @@ gst_subtitle_block_new (GstSubtitleStyleSet * style_set)
 
   g_return_val_if_fail (style_set != NULL, NULL);
 
-  block = g_slice_new0 (GstSubtitleBlock);
+  block = g_new0 (GstSubtitleBlock, 1);
   gst_mini_object_init (GST_MINI_OBJECT_CAST (block), 0,
       gst_subtitle_block_get_type (), NULL, NULL,
       (GstMiniObjectFreeFunction) _gst_subtitle_block_free);
@@ -227,7 +227,7 @@ _gst_subtitle_region_free (GstSubtitleRegion * region)
   g_return_if_fail (region != NULL);
   gst_subtitle_style_set_unref (region->style_set);
   g_ptr_array_unref (region->blocks);
-  g_slice_free (GstSubtitleRegion, region);
+  g_free (region);
 }
 
 GST_DEFINE_MINI_OBJECT_TYPE (GstSubtitleRegion, gst_subtitle_region);
@@ -250,7 +250,7 @@ gst_subtitle_region_new (GstSubtitleStyleSet * style_set)
 
   g_return_val_if_fail (style_set != NULL, NULL);
 
-  region = g_slice_new0 (GstSubtitleRegion);
+  region = g_new0 (GstSubtitleRegion, 1);
   gst_mini_object_init (GST_MINI_OBJECT_CAST (region), 0,
       gst_subtitle_region_get_type (), NULL, NULL,
       (GstMiniObjectFreeFunction) _gst_subtitle_region_free);
diff --git a/subprojects/gst-plugins-bad/ext/ttml/ttmlparse.c b/subprojects/gst-plugins-bad/ext/ttml/ttmlparse.c
index 3c7d8f07ce..eca650de39 100644
--- a/subprojects/gst-plugins-bad/ext/ttml/ttmlparse.c
+++ b/subprojects/gst-plugins-bad/ext/ttml/ttmlparse.c
@@ -111,7 +111,7 @@ struct _TtmlStyleSet
 static TtmlStyleSet *
 ttml_style_set_new (void)
 {
-  TtmlStyleSet *ret = g_slice_new0 (TtmlStyleSet);
+  TtmlStyleSet *ret = g_new0 (TtmlStyleSet, 1);
   ret->table = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_free);
   return ret;
 }
@@ -122,7 +122,7 @@ ttml_style_set_delete (TtmlStyleSet * style_set)
 {
   if (style_set) {
     g_hash_table_unref (style_set->table);
-    g_slice_free (TtmlStyleSet, style_set);
+    g_free (style_set);
   }
 }
 
@@ -254,7 +254,7 @@ ttml_delete_element (TtmlElement * element)
   g_free ((gpointer) element->region);
   ttml_style_set_delete (element->style_set);
   g_free ((gpointer) element->text);
-  g_slice_free (TtmlElement, element);
+  g_free (element);
 }
 
 
@@ -355,7 +355,7 @@ ttml_parse_element (const xmlNode * node)
     return NULL;
   }
 
-  element = g_slice_new0 (TtmlElement);
+  element = g_new0 (TtmlElement, 1);
   element->type = type;
 
   if ((value = ttml_get_xml_property (node, "id"))) {
@@ -1257,7 +1257,7 @@ ttml_create_scenes (GList * region_trees)
         "transition", g_list_length (active_trees));
 
     if (active_trees) {
-      cur_scene = g_slice_new0 (TtmlScene);
+      cur_scene = g_new0 (TtmlScene, 1);
       cur_scene->begin = timestamp;
       cur_scene->trees = active_trees;
     } else {
@@ -1439,7 +1439,7 @@ ttml_remove_nodes_by_region (GNode * node, const gchar * region)
 static TtmlElement *
 ttml_copy_element (const TtmlElement * element)
 {
-  TtmlElement *ret = g_slice_new0 (TtmlElement);
+  TtmlElement *ret = g_new0 (TtmlElement, 1);
 
   ret->type = element->type;
   if (element->id)
@@ -1765,7 +1765,7 @@ ttml_delete_scene (TtmlScene * scene)
     g_list_free_full (scene->trees, (GDestroyNotify) ttml_delete_tree);
   if (scene->buf)
     gst_buffer_unref (scene->buf);
-  g_slice_free (TtmlScene, scene);
+  g_free (scene);
 }