diff --git a/subprojects/gst-plugins-bad/gst-libs/gst/codecparsers/gstav1parser.c b/subprojects/gst-plugins-bad/gst-libs/gst/codecparsers/gstav1parser.c
index 3e80380976..8e9a206f27 100644
--- a/subprojects/gst-plugins-bad/gst-libs/gst/codecparsers/gstav1parser.c
+++ b/subprojects/gst-plugins-bad/gst-libs/gst/codecparsers/gstav1parser.c
@@ -544,7 +544,7 @@ gst_av1_parse_reset_state (GstAV1Parser * parser, gboolean free_sps)
     parser->state.sequence_changed = FALSE;
 
     if (parser->seq_header) {
-      g_slice_free (GstAV1SequenceHeaderOBU, parser->seq_header);
+      g_free (parser->seq_header);
       parser->seq_header = NULL;
     }
   }
@@ -1440,10 +1440,10 @@ gst_av1_parser_parse_sequence_header_obu (GstAV1Parser * parser,
             sizeof (GstAV1SequenceHeaderOBU)))
       goto success;
 
-    g_slice_free (GstAV1SequenceHeaderOBU, parser->seq_header);
+    g_free (parser->seq_header);
   }
 
-  parser->seq_header = g_slice_dup (GstAV1SequenceHeaderOBU, seq_header);
+  parser->seq_header = g_memdup2 (seq_header, sizeof (GstAV1SequenceHeaderOBU));
   gst_av1_parse_reset_state (parser, FALSE);
 
   /* choose_operating_point() set the operating_point */
@@ -4664,7 +4664,7 @@ gst_av1_parser_set_operating_point (GstAV1Parser * parser,
 GstAV1Parser *
 gst_av1_parser_new (void)
 {
-  return g_slice_new0 (GstAV1Parser);
+  return g_new0 (GstAV1Parser, 1);
 }
 
 /**
@@ -4683,6 +4683,6 @@ gst_av1_parser_free (GstAV1Parser * parser)
   g_return_if_fail (parser != NULL);
 
   if (parser->seq_header)
-    g_slice_free (GstAV1SequenceHeaderOBU, parser->seq_header);
-  g_slice_free (GstAV1Parser, parser);
+    g_free (parser->seq_header);
+  g_free (parser);
 }
diff --git a/subprojects/gst-plugins-bad/gst-libs/gst/codecparsers/gsth264parser.c b/subprojects/gst-plugins-bad/gst-libs/gst/codecparsers/gsth264parser.c
index 349d6d23b3..7f9000a6d5 100644
--- a/subprojects/gst-plugins-bad/gst-libs/gst/codecparsers/gsth264parser.c
+++ b/subprojects/gst-plugins-bad/gst-libs/gst/codecparsers/gsth264parser.c
@@ -1432,7 +1432,7 @@ gst_h264_nal_parser_new (void)
 {
   GstH264NalParser *nalparser;
 
-  nalparser = g_slice_new0 (GstH264NalParser);
+  nalparser = g_new0 (GstH264NalParser, 1);
 
   return nalparser;
 }
@@ -1452,7 +1452,7 @@ gst_h264_nal_parser_free (GstH264NalParser * nalparser)
     gst_h264_sps_clear (&nalparser->sps[i]);
   for (i = 0; i < GST_H264_MAX_PPS_COUNT; i++)
     gst_h264_pps_clear (&nalparser->pps[i]);
-  g_slice_free (GstH264NalParser, nalparser);
+  g_free (nalparser);
 
   nalparser = NULL;
 }
diff --git a/subprojects/gst-plugins-bad/gst-libs/gst/codecparsers/gsth265parser.c b/subprojects/gst-plugins-bad/gst-libs/gst/codecparsers/gsth265parser.c
index d232ba9f97..1426b3c10a 100644
--- a/subprojects/gst-plugins-bad/gst-libs/gst/codecparsers/gsth265parser.c
+++ b/subprojects/gst-plugins-bad/gst-libs/gst/codecparsers/gsth265parser.c
@@ -1357,7 +1357,7 @@ gst_h265_parser_new (void)
 {
   GstH265Parser *parser;
 
-  parser = g_slice_new0 (GstH265Parser);
+  parser = g_new0 (GstH265Parser, 1);
 
   return parser;
 }
@@ -1371,7 +1371,7 @@ gst_h265_parser_new (void)
 void
 gst_h265_parser_free (GstH265Parser * parser)
 {
-  g_slice_free (GstH265Parser, parser);
+  g_free (parser);
   parser = NULL;
 }
 
diff --git a/subprojects/gst-plugins-bad/gst-libs/gst/codecparsers/gstmpegvideometa.c b/subprojects/gst-plugins-bad/gst-libs/gst/codecparsers/gstmpegvideometa.c
index bce5c67d69..c0e05e842e 100644
--- a/subprojects/gst-plugins-bad/gst-libs/gst/codecparsers/gstmpegvideometa.c
+++ b/subprojects/gst-plugins-bad/gst-libs/gst/codecparsers/gstmpegvideometa.c
@@ -47,18 +47,17 @@ gst_mpeg_video_meta_free (GstMpegVideoMeta * mpeg_video_meta,
     GstBuffer * buffer)
 {
   if (mpeg_video_meta->sequencehdr)
-    g_slice_free (GstMpegVideoSequenceHdr, mpeg_video_meta->sequencehdr);
+    g_free (mpeg_video_meta->sequencehdr);
   if (mpeg_video_meta->sequenceext)
-    g_slice_free (GstMpegVideoSequenceExt, mpeg_video_meta->sequenceext);
+    g_free (mpeg_video_meta->sequenceext);
   if (mpeg_video_meta->sequencedispext)
-    g_slice_free (GstMpegVideoSequenceDisplayExt,
-        mpeg_video_meta->sequencedispext);
+    g_free (mpeg_video_meta->sequencedispext);
   if (mpeg_video_meta->pichdr)
-    g_slice_free (GstMpegVideoPictureHdr, mpeg_video_meta->pichdr);
+    g_free (mpeg_video_meta->pichdr);
   if (mpeg_video_meta->picext)
-    g_slice_free (GstMpegVideoPictureExt, mpeg_video_meta->picext);
+    g_free (mpeg_video_meta->picext);
   if (mpeg_video_meta->quantext)
-    g_slice_free (GstMpegVideoQuantMatrixExt, mpeg_video_meta->quantext);
+    g_free (mpeg_video_meta->quantext);
 }
 
 static gboolean
@@ -160,19 +159,21 @@ gst_buffer_add_mpeg_video_meta (GstBuffer * buffer,
 
   if (seq_hdr)
     mpeg_video_meta->sequencehdr =
-        g_slice_dup (GstMpegVideoSequenceHdr, seq_hdr);
+        g_memdup2 (seq_hdr, sizeof (GstMpegVideoSequenceHdr));
   if (seq_ext)
     mpeg_video_meta->sequenceext =
-        g_slice_dup (GstMpegVideoSequenceExt, seq_ext);
+        g_memdup2 (seq_ext, sizeof (GstMpegVideoSequenceExt));
   if (disp_ext)
     mpeg_video_meta->sequencedispext =
-        g_slice_dup (GstMpegVideoSequenceDisplayExt, disp_ext);
-  mpeg_video_meta->pichdr = g_slice_dup (GstMpegVideoPictureHdr, pic_hdr);
+        g_memdup2 (disp_ext, sizeof (GstMpegVideoSequenceDisplayExt));
+  mpeg_video_meta->pichdr =
+      g_memdup2 (pic_hdr, sizeof (GstMpegVideoPictureHdr));
   if (pic_ext)
-    mpeg_video_meta->picext = g_slice_dup (GstMpegVideoPictureExt, pic_ext);
+    mpeg_video_meta->picext =
+        g_memdup2 (pic_ext, sizeof (GstMpegVideoPictureExt));
   if (quant_ext)
     mpeg_video_meta->quantext =
-        g_slice_dup (GstMpegVideoQuantMatrixExt, quant_ext);
+        g_memdup2 (quant_ext, sizeof (GstMpegVideoQuantMatrixExt));
 
   return mpeg_video_meta;
 }
diff --git a/subprojects/gst-plugins-bad/gst-libs/gst/codecparsers/gstvc1parser.c b/subprojects/gst-plugins-bad/gst-libs/gst/codecparsers/gstvc1parser.c
index 2c60ced949..f9af175a9b 100644
--- a/subprojects/gst-plugins-bad/gst-libs/gst/codecparsers/gstvc1parser.c
+++ b/subprojects/gst-plugins-bad/gst-libs/gst/codecparsers/gstvc1parser.c
@@ -2154,7 +2154,7 @@ failed:
 GstVC1BitPlanes *
 gst_vc1_bitplanes_new (void)
 {
-  return g_slice_new0 (GstVC1BitPlanes);
+  return g_new0 (GstVC1BitPlanes, 1);
 }
 
 /**
@@ -2167,7 +2167,7 @@ void
 gst_vc1_bitplanes_free (GstVC1BitPlanes * bitplanes)
 {
   gst_vc1_bitplanes_free_1 (bitplanes);
-  g_slice_free (GstVC1BitPlanes, bitplanes);
+  g_free (bitplanes);
 }
 
 /**
diff --git a/subprojects/gst-plugins-bad/gst-libs/gst/codecparsers/gstvp9parser.c b/subprojects/gst-plugins-bad/gst-libs/gst/codecparsers/gstvp9parser.c
index cb82a0816f..1452210457 100644
--- a/subprojects/gst-plugins-bad/gst-libs/gst/codecparsers/gstvp9parser.c
+++ b/subprojects/gst-plugins-bad/gst-libs/gst/codecparsers/gstvp9parser.c
@@ -637,11 +637,11 @@ gst_vp9_parser_new (void)
   INITIALIZE_DEBUG_CATEGORY;
   GST_DEBUG ("Create VP9 Parser");
 
-  parser = g_slice_new0 (GstVp9Parser);
+  parser = g_new0 (GstVp9Parser, 1);
   if (!parser)
     return NULL;
 
-  priv = g_slice_new0 (GstVp9ParserPrivate);
+  priv = g_new0 (GstVp9ParserPrivate, 1);
   if (!priv)
     return NULL;
 
@@ -664,10 +664,10 @@ gst_vp9_parser_free (GstVp9Parser * parser)
 {
   if (parser) {
     if (parser->priv) {
-      g_slice_free (GstVp9ParserPrivate, parser->priv);
+      g_free (parser->priv);
       parser->priv = NULL;
     }
-    g_slice_free (GstVp9Parser, parser);
+    g_free (parser);
   }
 }