diff --git a/docs/libs/gst-plugins-base-libs-sections.txt b/docs/libs/gst-plugins-base-libs-sections.txt
index 87d5d83d68..f0b17b9173 100644
--- a/docs/libs/gst-plugins-base-libs-sections.txt
+++ b/docs/libs/gst-plugins-base-libs-sections.txt
@@ -2541,6 +2541,7 @@ gst_video_decoder_get_max_decode_time
 gst_video_decoder_get_max_errors
 gst_video_decoder_get_oldest_frame
 gst_video_decoder_get_packetized
+gst_video_decoder_get_pending_frame_size
 gst_video_decoder_get_qos_proportion
 gst_video_decoder_have_frame
 gst_video_decoder_get_latency
diff --git a/gst-libs/gst/video/gstvideodecoder.c b/gst-libs/gst/video/gstvideodecoder.c
index d3370a7b3d..78558163da 100644
--- a/gst-libs/gst/video/gstvideodecoder.c
+++ b/gst-libs/gst/video/gstvideodecoder.c
@@ -2766,6 +2766,33 @@ gst_video_decoder_add_to_frame (GstVideoDecoder * decoder, int n_bytes)
   GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
 }
 
+/**
+ * gst_video_decoder_get_pending_frame_size:
+ * @decoder: a #GstVideoDecoder
+ *
+ * Returns the number of bytes previously added to the current frame
+ * by calling gst_video_decoder_add_to_frame().
+ *
+ * Returns: The number of bytes pending for the current frame
+ *
+ * Since: 1.4
+ */
+gsize
+gst_video_decoder_get_pending_frame_size (GstVideoDecoder * decoder)
+{
+  GstVideoDecoderPrivate *priv = decoder->priv;
+  gsize ret;
+
+  GST_VIDEO_DECODER_STREAM_LOCK (decoder);
+  ret = gst_adapter_available (priv->output_adapter);
+  GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
+
+  GST_LOG_OBJECT (decoder, "Current pending frame has %" G_GSIZE_FORMAT "bytes",
+      ret);
+
+  return ret;
+}
+
 static guint64
 gst_video_decoder_get_frame_duration (GstVideoDecoder * decoder,
     GstVideoCodecFrame * frame)
diff --git a/gst-libs/gst/video/gstvideodecoder.h b/gst-libs/gst/video/gstvideodecoder.h
index a08dc7e808..f3724b320c 100644
--- a/gst-libs/gst/video/gstvideodecoder.h
+++ b/gst-libs/gst/video/gstvideodecoder.h
@@ -363,6 +363,7 @@ GList *             gst_video_decoder_get_frames       (GstVideoDecoder *decoder
 void           gst_video_decoder_add_to_frame     (GstVideoDecoder *decoder,
 						   int n_bytes);
 GstFlowReturn  gst_video_decoder_have_frame       (GstVideoDecoder *decoder);
+gsize          gst_video_decoder_get_pending_frame_size (GstVideoDecoder *decoder);
 
 GstBuffer     *gst_video_decoder_allocate_output_buffer (GstVideoDecoder * decoder);
 
diff --git a/win32/common/libgstvideo.def b/win32/common/libgstvideo.def
index 3a82e46614..cdb6e9f7fa 100644
--- a/win32/common/libgstvideo.def
+++ b/win32/common/libgstvideo.def
@@ -99,6 +99,7 @@ EXPORTS
 	gst_video_decoder_get_oldest_frame
 	gst_video_decoder_get_output_state
 	gst_video_decoder_get_packetized
+	gst_video_decoder_get_pending_frame_size
 	gst_video_decoder_get_qos_proportion
 	gst_video_decoder_get_type
 	gst_video_decoder_have_frame