basevideo: Move base video from vp8 to gst-libs

10 files changed, 705 insertions, 347 deletions

diff --git a/gst-libs/gst/video/gstbasevideocodec.c b/gst-libs/gst/video/gstbasevideocodec.c
index 9cddc3bf4..75d0381e1 100644
--- a/gst-libs/gst/video/gstbasevideocodec.c
+++ b/gst-libs/gst/video/gstbasevideocodec.c
@@ -42,8 +42,15 @@ enum
 
 static void gst_base_video_codec_finalize (GObject * object);
 
+//static const GstQueryType *gst_base_video_codec_get_query_types (GstPad *pad);
+//static gboolean gst_base_video_codec_src_query (GstPad *pad, GstQuery *query);
+//static gboolean gst_base_video_codec_sink_query (GstPad *pad, GstQuery *query);
+//static gboolean gst_base_video_codec_src_event (GstPad *pad, GstEvent *event);
+//static gboolean gst_base_video_codec_sink_event (GstPad *pad, GstEvent *event);
 static GstStateChangeReturn gst_base_video_codec_change_state (GstElement *
     element, GstStateChange transition);
+//static GstFlowReturn gst_base_video_codec_push_all (GstBaseVideoCodec *base_video_codec, 
+//    gboolean at_eos);
 
 
 GST_BOILERPLATE (GstBaseVideoCodec, gst_base_video_codec, GstElement,
@@ -52,7 +59,7 @@ GST_BOILERPLATE (GstBaseVideoCodec, gst_base_video_codec, GstElement,
 static void
 gst_base_video_codec_base_init (gpointer g_class)
 {
-  GST_DEBUG_CATEGORY_INIT (basevideo_debug, "basevideo", 0,
+  GST_DEBUG_CATEGORY_INIT (basevideo_debug, "vp8basevideo", 0,
       "Base Video Classes");
 
 }
@@ -84,6 +91,8 @@ gst_base_video_codec_init (GstBaseVideoCodec * base_video_codec,
   g_return_if_fail (pad_template != NULL);
 
   base_video_codec->sinkpad = gst_pad_new_from_template (pad_template, "sink");
+  //gst_pad_set_query_function (base_video_codec->sinkpad,
+  //    gst_base_video_codec_sink_query);
   gst_element_add_pad (GST_ELEMENT (base_video_codec),
       base_video_codec->sinkpad);
 
@@ -92,7 +101,6 @@ gst_base_video_codec_init (GstBaseVideoCodec * base_video_codec,
   g_return_if_fail (pad_template != NULL);
 
   base_video_codec->srcpad = gst_pad_new_from_template (pad_template, "src");
-  gst_pad_use_fixed_caps (base_video_codec->srcpad);
   gst_element_add_pad (GST_ELEMENT (base_video_codec),
       base_video_codec->srcpad);
 
@@ -108,6 +116,7 @@ gst_base_video_codec_reset (GstBaseVideoCodec * base_video_codec)
 
   base_video_codec->system_frame_number = 0;
 
+  //gst_segment_init (&base_video_codec->state.segment, GST_FORMAT_TIME);
   gst_adapter_clear (base_video_codec->input_adapter);
   gst_adapter_clear (base_video_codec->output_adapter);
 
diff --git a/gst-libs/gst/video/gstbasevideocodec.h b/gst-libs/gst/video/gstbasevideocodec.h
index b6acf62ee..f4a1cf95b 100644
--- a/gst-libs/gst/video/gstbasevideocodec.h
+++ b/gst-libs/gst/video/gstbasevideocodec.h
@@ -20,11 +20,6 @@
 #ifndef _GST_BASE_VIDEO_CODEC_H_
 #define _GST_BASE_VIDEO_CODEC_H_
 
-#ifndef GST_USE_UNSTABLE_API
-#warning "GstBaseVideoCodec is unstable API and may change in future."
-#warning "You can define GST_USE_UNSTABLE_API to avoid this warning."
-#endif
-
 #include <gst/gst.h>
 #include <gst/video/gstbasevideoutils.h>
 
diff --git a/gst-libs/gst/video/gstbasevideodecoder.c b/gst-libs/gst/video/gstbasevideodecoder.c
index 3d736dd06..b34820eb3 100644
--- a/gst-libs/gst/video/gstbasevideodecoder.c
+++ b/gst-libs/gst/video/gstbasevideodecoder.c
@@ -30,8 +30,6 @@ GST_DEBUG_CATEGORY_EXTERN (basevideo_debug);
 
 static void gst_base_video_decoder_finalize (GObject * object);
 
-static gboolean gst_base_video_decoder_sink_activate_push (GstPad * pad,
-    gboolean active);
 static gboolean gst_base_video_decoder_sink_setcaps (GstPad * pad,
     GstCaps * caps);
 static gboolean gst_base_video_decoder_sink_event (GstPad * pad,
@@ -42,6 +40,7 @@ static GstFlowReturn gst_base_video_decoder_chain (GstPad * pad,
     GstBuffer * buf);
 static gboolean gst_base_video_decoder_sink_query (GstPad * pad,
     GstQuery * query);
+//static GstFlowReturn gst_base_video_decoder_process (GstBaseVideoDecoder *base_video_decoder);
 static GstStateChangeReturn gst_base_video_decoder_change_state (GstElement *
     element, GstStateChange transition);
 static const GstQueryType *gst_base_video_decoder_get_query_types (GstPad *
@@ -54,12 +53,17 @@ static gboolean gst_base_video_decoder_src_convert (GstPad * pad,
 static void gst_base_video_decoder_reset (GstBaseVideoDecoder *
     base_video_decoder);
 
+static GstFlowReturn
+gst_base_video_decoder_have_frame_2 (GstBaseVideoDecoder * base_video_decoder);
+
 static guint64
 gst_base_video_decoder_get_timestamp (GstBaseVideoDecoder * base_video_decoder,
     int picture_number);
 static guint64
 gst_base_video_decoder_get_field_timestamp (GstBaseVideoDecoder *
     base_video_decoder, int field_offset);
+static guint64 gst_base_video_decoder_get_field_duration (GstBaseVideoDecoder *
+    base_video_decoder, int n_fields);
 static GstVideoFrame *gst_base_video_decoder_new_frame (GstBaseVideoDecoder *
     base_video_decoder);
 static void gst_base_video_decoder_free_frame (GstVideoFrame * frame);
@@ -99,8 +103,6 @@ gst_base_video_decoder_init (GstBaseVideoDecoder * base_video_decoder,
 
   pad = GST_BASE_VIDEO_CODEC_SINK_PAD (base_video_decoder);
 
-  gst_pad_set_activatepush_function (pad,
-      gst_base_video_decoder_sink_activate_push);
   gst_pad_set_chain_function (pad, gst_base_video_decoder_chain);
   gst_pad_set_event_function (pad, gst_base_video_decoder_sink_event);
   gst_pad_set_setcaps_function (pad, gst_base_video_decoder_sink_setcaps);
@@ -111,11 +113,12 @@ gst_base_video_decoder_init (GstBaseVideoDecoder * base_video_decoder,
   gst_pad_set_event_function (pad, gst_base_video_decoder_src_event);
   gst_pad_set_query_type_function (pad, gst_base_video_decoder_get_query_types);
   gst_pad_set_query_function (pad, gst_base_video_decoder_src_query);
+  gst_pad_use_fixed_caps (pad);
 
   base_video_decoder->input_adapter = gst_adapter_new ();
   base_video_decoder->output_adapter = gst_adapter_new ();
 
-  gst_segment_init (&base_video_decoder->state.segment, GST_FORMAT_TIME);
+  gst_segment_init (&base_video_decoder->segment, GST_FORMAT_TIME);
   gst_base_video_decoder_reset (base_video_decoder);
 
   base_video_decoder->current_frame =
@@ -125,57 +128,14 @@ gst_base_video_decoder_init (GstBaseVideoDecoder * base_video_decoder,
 }
 
 static gboolean
-gst_base_video_decoder_sink_activate (GstBaseVideoDecoder * decoder,
-    gboolean active)
-{
-  GstBaseVideoDecoderClass *klass;
-  gboolean result = FALSE;
-
-  GST_DEBUG_OBJECT (decoder, "activate");
-
-  klass = GST_BASE_VIDEO_DECODER_GET_CLASS (decoder);
-
-  if (active) {
-    if (klass->start)
-      result = klass->start (decoder);
-  } else {
-    /* We must make sure streaming has finished before resetting things
-     * and calling the ::stop vfunc */
-    GST_PAD_STREAM_LOCK (GST_BASE_VIDEO_CODEC_SINK_PAD (decoder));
-    GST_PAD_STREAM_UNLOCK (GST_BASE_VIDEO_CODEC_SINK_PAD (decoder));
-
-    if (klass->stop)
-      result = klass->stop (decoder);
-  }
-
-  GST_DEBUG_OBJECT (decoder, "activate: %d", result);
-
-  return result;
-}
-
-static gboolean
-gst_base_video_decoder_sink_activate_push (GstPad * pad, gboolean active)
-{
-  gboolean result = TRUE;
-  GstBaseVideoDecoder *base_video_decoder;
-
-  base_video_decoder = GST_BASE_VIDEO_DECODER (gst_pad_get_parent (pad));
-
-  result = gst_base_video_decoder_sink_activate (base_video_decoder, active);
-
-  gst_object_unref (base_video_decoder);
-
-  return result;
-}
-
-static gboolean
 gst_base_video_decoder_sink_setcaps (GstPad * pad, GstCaps * caps)
 {
   GstBaseVideoDecoder *base_video_decoder;
   GstBaseVideoDecoderClass *base_video_decoder_class;
   GstStructure *structure;
   const GValue *codec_data;
-  gboolean res = TRUE;
+  GstVideoState *state;
+  gboolean ret = TRUE;
 
   base_video_decoder = GST_BASE_VIDEO_DECODER (gst_pad_get_parent (pad));
   base_video_decoder_class =
@@ -183,24 +143,40 @@ gst_base_video_decoder_sink_setcaps (GstPad * pad, GstCaps * caps)
 
   GST_DEBUG ("setcaps %" GST_PTR_FORMAT, caps);
 
-  if (base_video_decoder->codec_data) {
-    gst_buffer_unref (base_video_decoder->codec_data);
-    base_video_decoder->codec_data = NULL;
+  state = &base_video_decoder->state;
+
+  if (state->codec_data) {
+    gst_buffer_unref (state->codec_data);
   }
+  memset (state, 0, sizeof (GstVideoState));
 
   structure = gst_caps_get_structure (caps, 0);
 
+  gst_video_format_parse_caps (caps, NULL, &state->width, &state->height);
+  gst_video_parse_caps_framerate (caps, &state->fps_n, &state->fps_d);
+  gst_video_parse_caps_pixel_aspect_ratio (caps, &state->par_n, &state->par_d);
+
+#if 0
+  /* requires 0.10.23 */
+  state->have_interlaced =
+      gst_video_format_parse_caps_interlaced (caps, &state->interlaced);
+#else
+  state->have_interlaced = gst_structure_get_boolean (structure,
+      "interlaced", &state->interlaced);
+#endif
+
   codec_data = gst_structure_get_value (structure, "codec_data");
   if (codec_data && G_VALUE_TYPE (codec_data) == GST_TYPE_BUFFER) {
-    base_video_decoder->codec_data = gst_value_get_buffer (codec_data);
+    state->codec_data = gst_value_get_buffer (codec_data);
   }
 
-  if (base_video_decoder_class->set_sink_caps)
-    res = base_video_decoder_class->set_sink_caps (base_video_decoder, caps);
+  if (base_video_decoder_class->start) {
+    ret = base_video_decoder_class->start (base_video_decoder);
+  }
 
   g_object_unref (base_video_decoder);
 
-  return res;
+  return ret;
 }
 
 static void
@@ -215,6 +191,15 @@ gst_base_video_decoder_finalize (GObject * object)
 
   gst_base_video_decoder_reset (base_video_decoder);
 
+  if (base_video_decoder->input_adapter) {
+    g_object_unref (base_video_decoder->input_adapter);
+    base_video_decoder->input_adapter = NULL;
+  }
+  if (base_video_decoder->output_adapter) {
+    g_object_unref (base_video_decoder->output_adapter);
+    base_video_decoder->output_adapter = NULL;
+  }
+
   GST_DEBUG_OBJECT (object, "finalize");
 
   G_OBJECT_CLASS (parent_class)->finalize (object);
@@ -234,18 +219,17 @@ gst_base_video_decoder_sink_event (GstPad * pad, GstEvent * event)
   switch (GST_EVENT_TYPE (event)) {
     case GST_EVENT_EOS:
     {
-      GstVideoFrame *frame;
+      if (!base_video_decoder->packetized) {
+        GstFlowReturn flow_ret;
 
-      frame = g_malloc0 (sizeof (GstVideoFrame));
-      frame->presentation_frame_number =
-          base_video_decoder->presentation_frame_number;
-      frame->presentation_duration = 0;
-      base_video_decoder->presentation_frame_number++;
+        do {
+          flow_ret =
+              base_video_decoder_class->parse_data (base_video_decoder, TRUE);
+        } while (flow_ret == GST_FLOW_OK);
+      }
 
-      base_video_decoder->frames =
-          g_list_append (base_video_decoder->frames, frame);
       if (base_video_decoder_class->finish) {
-        base_video_decoder_class->finish (base_video_decoder, frame);
+        base_video_decoder_class->finish (base_video_decoder);
       }
 
       ret =
@@ -262,6 +246,7 @@ gst_base_video_decoder_sink_event (GstPad * pad, GstEvent * event)
       gint64 start;
       gint64 stop;
       gint64 position;
+      GstSegment *segment = &base_video_decoder->segment;
 
       gst_event_parse_new_segment_full (event, &update, &rate,
           &applied_rate, &format, &start, &stop, &position);
@@ -269,16 +254,34 @@ gst_base_video_decoder_sink_event (GstPad * pad, GstEvent * event)
       if (format != GST_FORMAT_TIME)
         goto newseg_wrong_format;
 
-      gst_segment_set_newsegment_full (&base_video_decoder->state.segment,
+      if (!update) {
+        gst_base_video_decoder_reset (base_video_decoder);
+      }
+
+      base_video_decoder->timestamp_offset = start;
+
+      gst_segment_set_newsegment_full (segment,
           update, rate, applied_rate, format, start, stop, position);
-      GST_DEBUG ("new segment %" GST_SEGMENT_FORMAT,
-          &base_video_decoder->state.segment);
+
+      GST_WARNING ("new segment: format %d rate %g start %" GST_TIME_FORMAT
+          " stop %" GST_TIME_FORMAT
+          " position %" GST_TIME_FORMAT
+          " update %d",
+          format, rate,
+          GST_TIME_ARGS (segment->start),
+          GST_TIME_ARGS (segment->stop), GST_TIME_ARGS (segment->time), update);
 
       ret =
           gst_pad_push_event (GST_BASE_VIDEO_CODEC_SRC_PAD (base_video_decoder),
           event);
     }
       break;
+    case GST_EVENT_FLUSH_STOP:{
+      GST_OBJECT_LOCK (base_video_decoder);
+      base_video_decoder->earliest_time = GST_CLOCK_TIME_NONE;
+      base_video_decoder->proportion = 0.5;
+      GST_OBJECT_UNLOCK (base_video_decoder);
+    }
     default:
       /* FIXME this changes the order of events */
       ret =
@@ -318,6 +321,8 @@ gst_base_video_decoder_src_event (GstPad * pad, GstEvent * event)
       gint64 cur, stop;
       gint64 tcur, tstop;
 
+      GST_DEBUG ("seek event");
+
       gst_event_parse_seek (event, &rate, &format, &flags, &cur_type,
           &cur, &stop_type, &stop);
       gst_event_unref (event);
@@ -348,12 +353,28 @@ gst_base_video_decoder_src_event (GstPad * pad, GstEvent * event)
       gdouble proportion;
       GstClockTimeDiff diff;
       GstClockTime timestamp;
+      GstClockTime duration;
 
       gst_event_parse_qos (event, &proportion, &diff, &timestamp);
 
       GST_OBJECT_LOCK (base_video_decoder);
       base_video_decoder->proportion = proportion;
-      base_video_decoder->earliest_time = timestamp + diff;
+      if (G_LIKELY (GST_CLOCK_TIME_IS_VALID (timestamp))) {
+        if (G_UNLIKELY (diff > 0)) {
+          if (base_video_decoder->state.fps_n > 0)
+            duration =
+                gst_util_uint64_scale (GST_SECOND,
+                base_video_decoder->state.fps_d,
+                base_video_decoder->state.fps_n);
+          else
+            duration = 0;
+          base_video_decoder->earliest_time = timestamp + 2 * diff + duration;
+        } else {
+          base_video_decoder->earliest_time = timestamp + diff;
+        }
+      } else {
+        base_video_decoder->earliest_time = GST_CLOCK_TIME_NONE;
+      }
       GST_OBJECT_UNLOCK (base_video_decoder);
 
       GST_DEBUG_OBJECT (base_video_decoder,
@@ -495,6 +516,8 @@ static const GstQueryType *
 gst_base_video_decoder_get_query_types (GstPad * pad)
 {
   static const GstQueryType query_types[] = {
+    GST_QUERY_POSITION,
+    GST_QUERY_DURATION,
     GST_QUERY_CONVERT,
     0
   };
@@ -506,17 +529,45 @@ static gboolean
 gst_base_video_decoder_src_query (GstPad * pad, GstQuery * query)
 {
   GstBaseVideoDecoder *enc;
-  gboolean res;
+  gboolean res = TRUE;
 
   enc = GST_BASE_VIDEO_DECODER (gst_pad_get_parent (pad));
 
   switch GST_QUERY_TYPE
     (query) {
+    case GST_QUERY_POSITION:
+    {
+      GstFormat format;
+      gint64 time;
+
+      gst_query_parse_position (query, &format, NULL);
+      GST_DEBUG ("query in format %d", format);
+
+      if (format != GST_FORMAT_TIME) {
+        goto error;
+      }
+
+      time = enc->last_timestamp;
+      time = gst_segment_to_stream_time (&enc->segment, GST_FORMAT_TIME, time);
+
+      gst_query_set_position (query, format, time);
+
+      res = TRUE;
+
+      break;
+    }
+    case GST_QUERY_DURATION:
+    {
+      res = gst_pad_peer_query (enc->base_video_codec.sinkpad, query);
+      break;
+    }
     case GST_QUERY_CONVERT:
     {
       GstFormat src_fmt, dest_fmt;
       gint64 src_val, dest_val;
 
+      GST_DEBUG ("convert query");
+
       gst_query_parse_convert (query, &src_fmt, &src_val, &dest_fmt, &dest_val);
       res =
           gst_base_video_decoder_src_convert (pad, src_fmt, src_val, &dest_fmt,
@@ -533,7 +584,7 @@ gst_base_video_decoder_src_query (GstPad * pad, GstQuery * query)
   return res;
 
 error:
-  GST_DEBUG_OBJECT (enc, "query failed");
+  GST_ERROR_OBJECT (enc, "query failed");
   gst_object_unref (enc);
   return res;
 }
@@ -594,6 +645,64 @@ gst_pad_is_negotiated (GstPad * pad)
 }
 #endif
 
+typedef struct _Timestamp Timestamp;
+struct _Timestamp
+{
+  guint64 offset;
+  GstClockTime timestamp;
+  GstClockTime duration;
+};
+
+static void
+gst_base_video_decoder_add_timestamp (GstBaseVideoDecoder * base_video_decoder,
+    GstBuffer * buffer)
+{
+  Timestamp *ts;
+
+  ts = g_malloc (sizeof (Timestamp));
+
+  GST_DEBUG ("adding timestamp %lld %" GST_TIME_FORMAT,
+      base_video_decoder->input_offset,
+      GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buffer)));
+
+  ts->offset = base_video_decoder->input_offset;
+  ts->timestamp = GST_BUFFER_TIMESTAMP (buffer);
+  ts->duration = GST_BUFFER_DURATION (buffer);
+
+  base_video_decoder->timestamps =
+      g_list_append (base_video_decoder->timestamps, ts);
+}
+
+static void
+gst_base_video_decoder_get_timestamp_at_offset (GstBaseVideoDecoder *
+    base_video_decoder, guint64 offset, GstClockTime * timestamp,
+    GstClockTime * duration)
+{
+  Timestamp *ts;
+  GList *g;
+
+  *timestamp = GST_CLOCK_TIME_NONE;
+  *duration = GST_CLOCK_TIME_NONE;
+
+  g = base_video_decoder->timestamps;
+  while (g) {
+    ts = g->data;
+    if (ts->offset <= offset) {
+      *timestamp = ts->timestamp;
+      *duration = ts->duration;
+      g_free (ts);
+      g = g_list_next (g);
+      base_video_decoder->timestamps =
+          g_list_remove (base_video_decoder->timestamps, ts);
+    } else {
+      break;
+    }
+  }
+
+  GST_DEBUG ("got timestamp %lld %" GST_TIME_FORMAT,
+      offset, GST_TIME_ARGS (*timestamp));
+}
+
 static void
 gst_base_video_decoder_reset (GstBaseVideoDecoder * base_video_decoder)
 {
@@ -613,17 +722,25 @@ gst_base_video_decoder_reset (GstBaseVideoDecoder * base_video_decoder)
   base_video_decoder->timestamp_offset = GST_CLOCK_TIME_NONE;
   base_video_decoder->system_frame_number = 0;
   base_video_decoder->presentation_frame_number = 0;
-  base_video_decoder->last_sink_timestamp = GST_CLOCK_TIME_NONE;
-  base_video_decoder->last_sink_offset_end = GST_CLOCK_TIME_NONE;
   base_video_decoder->base_picture_number = 0;
   base_video_decoder->last_timestamp = GST_CLOCK_TIME_NONE;
 
-  base_video_decoder->offset = 0;
+  base_video_decoder->input_offset = 0;
+  base_video_decoder->frame_offset = 0;
+
+  /* This function could be called from finalize() */
+  if (base_video_decoder->input_adapter) {
+    gst_adapter_clear (base_video_decoder->input_adapter);
+  }
+  if (base_video_decoder->output_adapter) {
+    gst_adapter_clear (base_video_decoder->output_adapter);
+  }
 
   if (base_video_decoder->caps) {
     gst_caps_unref (base_video_decoder->caps);
     base_video_decoder->caps = NULL;
   }
+  //gst_segment_init (&base_video_decoder->segment, GST_FORMAT_TIME);
 
   if (base_video_decoder->current_frame) {
     gst_base_video_decoder_free_frame (base_video_decoder->current_frame);
@@ -639,27 +756,26 @@ gst_base_video_decoder_reset (GstBaseVideoDecoder * base_video_decoder)
   g_list_free (base_video_decoder->frames);
   base_video_decoder->frames = NULL;
 
+  GST_OBJECT_LOCK (base_video_decoder);
+  base_video_decoder->earliest_time = GST_CLOCK_TIME_NONE;
+  base_video_decoder->proportion = 0.5;
+  GST_OBJECT_UNLOCK (base_video_decoder);
+
   if (base_video_decoder_class->reset) {
     base_video_decoder_class->reset (base_video_decoder);
   }
 }
 
-static GstBuffer *
-gst_adapter_get_buffer (GstAdapter * adapter)
-{
-  return gst_buffer_ref (GST_BUFFER (adapter->buflist->data));
-
-}
-
 static GstFlowReturn
 gst_base_video_decoder_chain (GstPad * pad, GstBuffer * buf)
 {
   GstBaseVideoDecoder *base_video_decoder;
   GstBaseVideoDecoderClass *klass;
-  GstBuffer *buffer;
   GstFlowReturn ret;
 
-  GST_DEBUG ("chain %" G_GINT64_FORMAT, GST_BUFFER_TIMESTAMP (buf));
+  GST_DEBUG ("chain %" GST_TIME_FORMAT " duration %" GST_TIME_FORMAT,
+      GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)),
+      GST_TIME_ARGS (GST_BUFFER_DURATION (buf)));
 
 #if 0
   /* requiring the pad to be negotiated makes it impossible to use
@@ -677,9 +793,7 @@ gst_base_video_decoder_chain (GstPad * pad, GstBuffer * buf)
 
   if (G_UNLIKELY (GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DISCONT))) {
     GST_DEBUG_OBJECT (base_video_decoder, "received DISCONT buffer");
-    if (base_video_decoder->started) {
-      gst_base_video_decoder_reset (base_video_decoder);
-    }
+    gst_base_video_decoder_reset (base_video_decoder);
   }
 
   if (!base_video_decoder->started) {
@@ -687,16 +801,15 @@ gst_base_video_decoder_chain (GstPad * pad, GstBuffer * buf)
     base_video_decoder->started = TRUE;
   }
 
-  if (GST_BUFFER_TIMESTAMP (buf) != GST_CLOCK_TIME_NONE) {
-    GST_DEBUG ("timestamp %" G_GINT64_FORMAT " offset %" G_GINT64_FORMAT,
-        GST_BUFFER_TIMESTAMP (buf), base_video_decoder->offset);
-    base_video_decoder->last_sink_timestamp = GST_BUFFER_TIMESTAMP (buf);
+  if (base_video_decoder->current_frame == NULL) {
+    base_video_decoder->current_frame =
+        gst_base_video_decoder_new_frame (base_video_decoder);
   }
-  if (GST_BUFFER_OFFSET_END (buf) != -1) {
-    GST_DEBUG ("gp %" G_GINT64_FORMAT, GST_BUFFER_OFFSET_END (buf));
-    base_video_decoder->last_sink_offset_end = GST_BUFFER_OFFSET_END (buf);
+
+  if (GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
+    gst_base_video_decoder_add_timestamp (base_video_decoder, buf);
   }
-  base_video_decoder->offset += GST_BUFFER_SIZE (buf);
+  base_video_decoder->input_offset += GST_BUFFER_SIZE (buf);
 
 #if 0
   if (base_video_decoder->timestamp_offset == GST_CLOCK_TIME_NONE &&
@@ -706,59 +819,55 @@ gst_base_video_decoder_chain (GstPad * pad, GstBuffer * buf)
   }
 #endif
 
-  if (base_video_decoder->current_frame == NULL) {
-    base_video_decoder->current_frame =
-        gst_base_video_decoder_new_frame (base_video_decoder);
-  }
+  if (base_video_decoder->packetized) {
+    base_video_decoder->current_frame->sink_buffer = buf;
 
-  gst_adapter_push (base_video_decoder->input_adapter, buf);
+    ret = gst_base_video_decoder_have_frame_2 (base_video_decoder);
+  } else {
 
-  if (!base_video_decoder->have_sync) {
-    int n, m;
+    gst_adapter_push (base_video_decoder->input_adapter, buf);
 
-    GST_DEBUG ("no sync, scanning");
+    if (!base_video_decoder->have_sync) {
+      int n, m;
 
-    n = gst_adapter_available (base_video_decoder->input_adapter);
-    m = klass->scan_for_sync (base_video_decoder, FALSE, 0, n);
+      GST_DEBUG ("no sync, scanning");
 
-    if (m < 0) {
-      g_warning ("subclass returned negative scan %d", m);
-    }
+      n = gst_adapter_available (base_video_decoder->input_adapter);
+      m = klass->scan_for_sync (base_video_decoder, FALSE, 0, n);
+      if (m == -1) {
+        gst_object_unref (base_video_decoder);
+        return GST_FLOW_OK;
+      }
 
-    if (m >= n) {
-      g_warning ("subclass scanned past end %d >= %d", m, n);
-    }
+      if (m >= n) {
+        GST_ERROR ("subclass scanned past end %d >= %d", m, n);
+      }
+
+      gst_adapter_flush (base_video_decoder->input_adapter, m);
 
-    gst_adapter_flush (base_video_decoder->input_adapter, m);
+      if (m < n) {
+        GST_DEBUG ("found possible sync after %d bytes (of %d)", m, n);
 
-    if (m < n) {
-      GST_DEBUG ("found possible sync after %d bytes (of %d)", m, n);
+        /* this is only "maybe" sync */
+        base_video_decoder->have_sync = TRUE;
+      }
 
-      /* this is only "maybe" sync */
-      base_video_decoder->have_sync = TRUE;
+      if (!base_video_decoder->have_sync) {
+        gst_object_unref (base_video_decoder);
+        return GST_FLOW_OK;
+      }
     }
 
-    if (!base_video_decoder->have_sync) {
+    do {
+      ret = klass->parse_data (base_video_decoder, FALSE);
+    } while (ret == GST_FLOW_OK);
+
+    if (ret == GST_BASE_VIDEO_DECODER_FLOW_NEED_DATA) {
       gst_object_unref (base_video_decoder);
       return GST_FLOW_OK;
     }
   }
 
-  /* FIXME: use gst_adapter_prev_timestamp() here instead? */
-  buffer = gst_adapter_get_buffer (base_video_decoder->input_adapter);
-
-  base_video_decoder->buffer_timestamp = GST_BUFFER_TIMESTAMP (buffer);
-  gst_buffer_unref (buffer);
-
-  do {
-    ret = klass->parse_data (base_video_decoder, FALSE);
-  } while (ret == GST_FLOW_OK);
-
-  if (ret == GST_BASE_VIDEO_DECODER_FLOW_NEED_DATA) {
-    gst_object_unref (base_video_decoder);
-    return GST_FLOW_OK;
-  }
-
   gst_object_unref (base_video_decoder);
   return ret;
 }
@@ -783,6 +892,9 @@ gst_base_video_decoder_change_state (GstElement * element,
 
   switch (transition) {
     case GST_STATE_CHANGE_PAUSED_TO_READY:
+      if (base_video_decoder_class->stop) {
+        base_video_decoder_class->stop (base_video_decoder);
+      }
       break;
     default:
       break;
@@ -799,11 +911,9 @@ gst_base_video_decoder_free_frame (GstVideoFrame * frame)
   if (frame->sink_buffer) {
     gst_buffer_unref (frame->sink_buffer);
   }
-#if 0
   if (frame->src_buffer) {
     gst_buffer_unref (frame->src_buffer);
   }
-#endif
 
   g_free (frame);
 }
@@ -821,9 +931,9 @@ gst_base_video_decoder_new_frame (GstBaseVideoDecoder * base_video_decoder)
   frame->decode_frame_number = frame->system_frame_number -
       base_video_decoder->reorder_depth;
 
-  frame->decode_timestamp = -1;
-  frame->presentation_timestamp = -1;
-  frame->presentation_duration = -1;
+  frame->decode_timestamp = GST_CLOCK_TIME_NONE;
+  frame->presentation_timestamp = GST_CLOCK_TIME_NONE;
+  frame->presentation_duration = GST_CLOCK_TIME_NONE;
   frame->n_fields = 2;
 
   return frame;
@@ -841,29 +951,30 @@ gst_base_video_decoder_finish_frame (GstBaseVideoDecoder * base_video_decoder,
   base_video_decoder_class =
       GST_BASE_VIDEO_DECODER_GET_CLASS (base_video_decoder);
 
-  GST_DEBUG ("finish frame sync=%d pts=%" G_GINT64_FORMAT, frame->is_sync_point,
+  GST_DEBUG ("finish frame sync=%d pts=%lld", frame->is_sync_point,
       frame->presentation_timestamp);
 
-  if (frame->is_sync_point) {
-    if (GST_CLOCK_TIME_IS_VALID (frame->presentation_timestamp)) {
-      if (frame->presentation_timestamp != base_video_decoder->timestamp_offset) {
-        GST_DEBUG ("sync timestamp %" G_GINT64_FORMAT " diff %" G_GINT64_FORMAT,
-            frame->presentation_timestamp,
-            frame->presentation_timestamp -
-            base_video_decoder->state.segment.start);
-        base_video_decoder->timestamp_offset = frame->presentation_timestamp;
-        base_video_decoder->field_index = 0;
-      } else {
-        /* This case is for one initial timestamp and no others, e.g.,
-         * filesrc ! decoder ! xvimagesink */
-        GST_WARNING ("sync timestamp didn't change, ignoring");
-        frame->presentation_timestamp = GST_CLOCK_TIME_NONE;
-      }
+  if (GST_CLOCK_TIME_IS_VALID (frame->presentation_timestamp)) {
+    if (frame->presentation_timestamp != base_video_decoder->timestamp_offset) {
+      GST_DEBUG ("sync timestamp %lld diff %lld",
+          frame->presentation_timestamp,
+          frame->presentation_timestamp - base_video_decoder->segment.start);
+      base_video_decoder->timestamp_offset = frame->presentation_timestamp;
+      base_video_decoder->field_index = 0;
     } else {
+      /* This case is for one initial timestamp and no others, e.g.,
+       * filesrc ! decoder ! xvimagesink */
+      GST_WARNING ("sync timestamp didn't change, ignoring");
+      frame->presentation_timestamp = GST_CLOCK_TIME_NONE;
+    }
+  } else {
+    if (frame->is_sync_point) {
       GST_WARNING ("sync point doesn't have timestamp");
-      if (GST_CLOCK_TIME_IS_VALID (base_video_decoder->timestamp_offset)) {
-        GST_ERROR ("No base timestamp.  Assuming frames start at 0");
-        base_video_decoder->timestamp_offset = 0;
+      if (!GST_CLOCK_TIME_IS_VALID (base_video_decoder->timestamp_offset)) {
+        GST_WARNING
+            ("No base timestamp.  Assuming frames start at segment start");
+        base_video_decoder->timestamp_offset =
+            base_video_decoder->segment.start;
         base_video_decoder->field_index = 0;
       }
     }
@@ -882,15 +993,14 @@ gst_base_video_decoder_finish_frame (GstBaseVideoDecoder * base_video_decoder,
   }
   if (frame->presentation_duration == GST_CLOCK_TIME_NONE) {
     frame->presentation_duration =
-        gst_base_video_decoder_get_field_timestamp (base_video_decoder,
-        frame->field_index + frame->n_fields) - frame->presentation_timestamp;
+        gst_base_video_decoder_get_field_duration (base_video_decoder,
+        frame->n_fields);
   }
 
   if (GST_CLOCK_TIME_IS_VALID (base_video_decoder->last_timestamp)) {
     if (frame->presentation_timestamp < base_video_decoder->last_timestamp) {
-      GST_WARNING ("decreasing timestamp (%" G_GINT64_FORMAT " < %"
-          G_GINT64_FORMAT ")", frame->presentation_timestamp,
-          base_video_decoder->last_timestamp);
+      GST_WARNING ("decreasing timestamp (%lld < %lld)",
+          frame->presentation_timestamp, base_video_decoder->last_timestamp);
     }
   }
   base_video_decoder->last_timestamp = frame->presentation_timestamp;
@@ -927,10 +1037,11 @@ gst_base_video_decoder_finish_frame (GstBaseVideoDecoder * base_video_decoder,
 
   GST_BUFFER_TIMESTAMP (frame->src_buffer) = frame->presentation_timestamp;
   GST_BUFFER_DURATION (frame->src_buffer) = frame->presentation_duration;
-  GST_BUFFER_OFFSET (frame->src_buffer) = -1;
-  GST_BUFFER_OFFSET_END (frame->src_buffer) = -1;
+  GST_BUFFER_OFFSET (frame->src_buffer) = GST_BUFFER_OFFSET_NONE;
+  GST_BUFFER_OFFSET_END (frame->src_buffer) = GST_BUFFER_OFFSET_NONE;
 
-  GST_DEBUG ("pushing frame %" G_GINT64_FORMAT, frame->presentation_timestamp);
+  GST_DEBUG ("pushing frame %" GST_TIME_FORMAT,
+      GST_TIME_ARGS (frame->presentation_timestamp));
 
   base_video_decoder->frames =
       g_list_remove (base_video_decoder->frames, frame);
@@ -947,12 +1058,31 @@ gst_base_video_decoder_finish_frame (GstBaseVideoDecoder * base_video_decoder,
     gint64 stop = GST_BUFFER_TIMESTAMP (src_buffer) +
         GST_BUFFER_DURATION (src_buffer);
 
-    if (gst_segment_clip (&base_video_decoder->state.segment, GST_FORMAT_TIME,
+    if (gst_segment_clip (&base_video_decoder->segment, GST_FORMAT_TIME,
             start, stop, &start, &stop)) {
       GST_BUFFER_TIMESTAMP (src_buffer) = start;
       GST_BUFFER_DURATION (src_buffer) = stop - start;
+      GST_DEBUG ("accepting buffer inside segment: %" GST_TIME_FORMAT
+          " %" GST_TIME_FORMAT
+          " seg %" GST_TIME_FORMAT " to %" GST_TIME_FORMAT
+          " time %" GST_TIME_FORMAT,
+          GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (src_buffer)),
+          GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (src_buffer) +
+              GST_BUFFER_DURATION (src_buffer)),
+          GST_TIME_ARGS (base_video_decoder->segment.start),
+          GST_TIME_ARGS (base_video_decoder->segment.stop),
+          GST_TIME_ARGS (base_video_decoder->segment.time));
     } else {
-      GST_DEBUG ("dropping buffer outside segment");
+      GST_DEBUG ("dropping buffer outside segment: %" GST_TIME_FORMAT
+          " %" GST_TIME_FORMAT
+          " seg %" GST_TIME_FORMAT " to %" GST_TIME_FORMAT
+          " time %" GST_TIME_FORMAT,
+          GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (src_buffer)),
+          GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (src_buffer) +
+              GST_BUFFER_DURATION (src_buffer)),
+          GST_TIME_ARGS (base_video_decoder->segment.start),
+          GST_TIME_ARGS (base_video_decoder->segment.stop),
+          GST_TIME_ARGS (base_video_decoder->segment.time));
       gst_buffer_unref (src_buffer);
       return GST_FLOW_OK;
     }
@@ -962,6 +1092,76 @@ gst_base_video_decoder_finish_frame (GstBaseVideoDecoder * base_video_decoder,
       src_buffer);
 }
 
+GstFlowReturn
+gst_base_video_decoder_skip_frame (GstBaseVideoDecoder * base_video_decoder,
+    GstVideoFrame * frame)
+{
+  GstBaseVideoDecoderClass *base_video_decoder_class;
+
+  GST_DEBUG ("finish frame");
+
+  base_video_decoder_class =
+      GST_BASE_VIDEO_DECODER_GET_CLASS (base_video_decoder);
+
+  GST_DEBUG ("finish frame sync=%d pts=%lld", frame->is_sync_point,
+      frame->presentation_timestamp);
+
+  if (GST_CLOCK_TIME_IS_VALID (frame->presentation_timestamp)) {
+    if (frame->presentation_timestamp != base_video_decoder->timestamp_offset) {
+      GST_DEBUG ("sync timestamp %lld diff %lld",
+          frame->presentation_timestamp,
+          frame->presentation_timestamp - base_video_decoder->segment.start);
+      base_video_decoder->timestamp_offset = frame->presentation_timestamp;
+      base_video_decoder->field_index = 0;
+    } else {
+      /* This case is for one initial timestamp and no others, e.g.,
+       * filesrc ! decoder ! xvimagesink */
+      GST_WARNING ("sync timestamp didn't change, ignoring");
+      frame->presentation_timestamp = GST_CLOCK_TIME_NONE;
+    }
+  } else {
+    if (frame->is_sync_point) {
+      GST_WARNING ("sync point doesn't have timestamp");
+      if (GST_CLOCK_TIME_IS_VALID (base_video_decoder->timestamp_offset)) {
+        GST_WARNING
+            ("No base timestamp.  Assuming frames start at segment start");
+        base_video_decoder->timestamp_offset =
+            base_video_decoder->segment.start;
+        base_video_decoder->field_index = 0;
+      }
+    }
+  }
+  frame->field_index = base_video_decoder->field_index;
+  base_video_decoder->field_index += frame->n_fields;
+
+  if (frame->presentation_timestamp == GST_CLOCK_TIME_NONE) {
+    frame->presentation_timestamp =
+        gst_base_video_decoder_get_field_timestamp (base_video_decoder,
+        frame->field_index);
+    frame->presentation_duration = GST_CLOCK_TIME_NONE;
+    frame->decode_timestamp =
+        gst_base_video_decoder_get_timestamp (base_video_decoder,
+        frame->decode_frame_number);
+  }
+  if (frame->presentation_duration == GST_CLOCK_TIME_NONE) {
+    frame->presentation_duration =
+        gst_base_video_decoder_get_field_duration (base_video_decoder,
+        frame->n_fields);
+  }
+
+  base_video_decoder->last_timestamp = frame->presentation_timestamp;
+
+  GST_DEBUG ("skipping frame %" GST_TIME_FORMAT,
+      GST_TIME_ARGS (frame->presentation_timestamp));
+
+  base_video_decoder->frames =
+      g_list_remove (base_video_decoder->frames, frame);
+
+  gst_base_video_decoder_free_frame (frame);
+
+  return GST_FLOW_OK;
+}
+
 int
 gst_base_video_decoder_get_height (GstBaseVideoDecoder * base_video_decoder)
 {
@@ -995,24 +1195,13 @@ gst_base_video_decoder_add_to_frame (GstBaseVideoDecoder * base_video_decoder,
 
   GST_DEBUG ("add to frame");
 
-#if 0
-  if (gst_adapter_available (base_video_decoder->output_adapter) == 0) {
-    GstBuffer *buffer;
-
-    buffer =
-        gst_adapter_get_orig_buffer_at_offset
-        (base_video_decoder->input_adapter, 0);
-    if (buffer) {
-      base_video_decoder->current_frame->presentation_timestamp =
-          GST_BUFFER_TIMESTAMP (buffer);
-      gst_buffer_unref (buffer);
-    }
-  }
-#endif
-
   if (n_bytes == 0)
     return;
 
+  if (gst_adapter_available (base_video_decoder->output_adapter) == 0) {
+    base_video_decoder->frame_offset = base_video_decoder->input_offset -
+        gst_adapter_available (base_video_decoder->input_adapter);
+  }
   buf = gst_adapter_take_buffer (base_video_decoder->input_adapter, n_bytes);
 
   gst_adapter_push (base_video_decoder->output_adapter, buf);
@@ -1056,21 +1245,33 @@ gst_base_video_decoder_get_field_timestamp (GstBaseVideoDecoder *
       base_video_decoder->state.fps_n * 2);
 }
 
+static guint64
+gst_base_video_decoder_get_field_duration (GstBaseVideoDecoder *
+    base_video_decoder, int n_fields)
+{
+  if (base_video_decoder->state.fps_d == 0) {
+    return GST_CLOCK_TIME_NONE;
+  }
+  if (n_fields < 0) {
+    GST_WARNING ("n_fields < 0");
+    return GST_CLOCK_TIME_NONE;
+  }
+  return gst_util_uint64_scale (n_fields,
+      base_video_decoder->state.fps_d * GST_SECOND,
+      base_video_decoder->state.fps_n * 2);
+}
+
 
 GstFlowReturn
 gst_base_video_decoder_have_frame (GstBaseVideoDecoder * base_video_decoder)
 {
-  GstVideoFrame *frame = base_video_decoder->current_frame;
   GstBuffer *buffer;
-  GstBaseVideoDecoderClass *base_video_decoder_class;
-  GstFlowReturn ret = GST_FLOW_OK;
   int n_available;
+  GstClockTime timestamp;
+  GstClockTime duration;
 
   GST_DEBUG ("have_frame");
 
-  base_video_decoder_class =
-      GST_BASE_VIDEO_DECODER_GET_CLASS (base_video_decoder);
-
   n_available = gst_adapter_available (base_video_decoder->output_adapter);
   if (n_available) {
     buffer = gst_adapter_take_buffer (base_video_decoder->output_adapter,
@@ -1079,56 +1280,54 @@ gst_base_video_decoder_have_frame (GstBaseVideoDecoder * base_video_decoder)
     buffer = gst_buffer_new_and_alloc (0);
   }
 
+  base_video_decoder->current_frame->sink_buffer = buffer;
+
+  gst_base_video_decoder_get_timestamp_at_offset (base_video_decoder,
+      base_video_decoder->frame_offset, &timestamp, &duration);
+
+  GST_BUFFER_TIMESTAMP (buffer) = timestamp;
+  GST_BUFFER_DURATION (buffer) = duration;
+
+  return gst_base_video_decoder_have_frame_2 (base_video_decoder);
+}
+
+static GstFlowReturn
+gst_base_video_decoder_have_frame_2 (GstBaseVideoDecoder * base_video_decoder)
+{
+  GstVideoFrame *frame = base_video_decoder->current_frame;
+  GstBaseVideoDecoderClass *base_video_decoder_class;
+  GstFlowReturn ret = GST_FLOW_OK;
+  GstClockTime running_time;
+  GstClockTimeDiff deadline;
+
+  base_video_decoder_class =
+      GST_BASE_VIDEO_DECODER_GET_CLASS (base_video_decoder);
+
   frame->distance_from_sync = base_video_decoder->distance_from_sync;
   base_video_decoder->distance_from_sync++;
 
-#if 0
-  if (frame->presentation_timestamp == GST_CLOCK_TIME_NONE) {
-    frame->presentation_timestamp =
-        gst_base_video_decoder_get_timestamp (base_video_decoder,
-        frame->presentation_frame_number);
-    frame->presentation_duration =
-        gst_base_video_decoder_get_timestamp (base_video_decoder,
-        frame->presentation_frame_number + 1) - frame->presentation_timestamp;
-    frame->decode_timestamp =
-        gst_base_video_decoder_get_timestamp (base_video_decoder,
-        frame->decode_frame_number);
-  }
-#endif
-
-#if 0
-  GST_BUFFER_TIMESTAMP (buffer) = frame->presentation_timestamp;
-  GST_BUFFER_DURATION (buffer) = frame->presentation_duration;
-  if (frame->decode_frame_number < 0) {
-    GST_BUFFER_OFFSET (buffer) = 0;
-  } else {
-    GST_BUFFER_OFFSET (buffer) = frame->decode_timestamp;
-  }
-  GST_BUFFER_OFFSET_END (buffer) = GST_CLOCK_TIME_NONE;
-#endif
+  frame->presentation_timestamp = GST_BUFFER_TIMESTAMP (frame->sink_buffer);
+  frame->presentation_duration = GST_BUFFER_DURATION (frame->sink_buffer);
 
   GST_DEBUG ("pts %" GST_TIME_FORMAT,
       GST_TIME_ARGS (frame->presentation_timestamp));
   GST_DEBUG ("dts %" GST_TIME_FORMAT, GST_TIME_ARGS (frame->decode_timestamp));
   GST_DEBUG ("dist %d", frame->distance_from_sync);
 
-  if (frame->is_sync_point) {
-    GST_BUFFER_FLAG_UNSET (buffer, GST_BUFFER_FLAG_DELTA_UNIT);
-  } else {
-    GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT);
-  }
-  if (base_video_decoder->discont) {
-    GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_DISCONT);
-    base_video_decoder->discont = FALSE;
-  }
-
-  frame->sink_buffer = buffer;
-
   base_video_decoder->frames = g_list_append (base_video_decoder->frames,
       frame);
 
+  running_time = gst_segment_to_running_time (&base_video_decoder->segment,
+      GST_FORMAT_TIME, frame->presentation_timestamp);
+
+  if (GST_CLOCK_TIME_IS_VALID (base_video_decoder->earliest_time))
+    deadline = GST_CLOCK_DIFF (base_video_decoder->earliest_time, running_time);
+  else
+    deadline = G_MAXINT64;
+
   /* do something with frame */
-  ret = base_video_decoder_class->handle_frame (base_video_decoder, frame);
+  ret = base_video_decoder_class->handle_frame (base_video_decoder, frame,
+      deadline);
   if (!GST_FLOW_IS_SUCCESS (ret)) {
     GST_DEBUG ("flow error!");
   }
@@ -1176,11 +1375,19 @@ gst_base_video_decoder_set_sync_point (GstBaseVideoDecoder * base_video_decoder)
 
   base_video_decoder->current_frame->is_sync_point = TRUE;
   base_video_decoder->distance_from_sync = 0;
+}
 
-  base_video_decoder->current_frame->presentation_timestamp =
-      base_video_decoder->last_sink_timestamp;
+GstVideoFrame *
+gst_base_video_decoder_get_oldest_frame (GstBaseVideoDecoder *
+    base_video_decoder)
+{
+  GList *g;
 
+  g = g_list_first (base_video_decoder->frames);
 
+  if (g == NULL)
+    return NULL;
+  return (GstVideoFrame *) (g->data);
 }
 
 GstVideoFrame *
@@ -1220,4 +1427,30 @@ gst_base_video_decoder_set_src_caps (GstBaseVideoDecoder * base_video_decoder)
   gst_pad_set_caps (GST_BASE_VIDEO_CODEC_SRC_PAD (base_video_decoder), caps);
 
   base_video_decoder->have_src_caps = TRUE;
+
+  gst_caps_unref (caps);
+}
+
+GstFlowReturn
+gst_base_video_decoder_alloc_src_frame (GstBaseVideoDecoder *
+    base_video_decoder, GstVideoFrame * frame)
+{
+  GstFlowReturn flow_ret;
+  int num_bytes;
+
+  gst_base_video_decoder_set_src_caps (base_video_decoder);
+
+  num_bytes = gst_video_format_get_size (base_video_decoder->state.format,
+      base_video_decoder->state.width, base_video_decoder->state.height);
+  flow_ret =
+      gst_pad_alloc_buffer_and_set_caps (GST_BASE_VIDEO_CODEC_SRC_PAD
+      (base_video_decoder), GST_BUFFER_OFFSET_NONE, num_bytes,
+      GST_PAD_CAPS (GST_BASE_VIDEO_CODEC_SRC_PAD (base_video_decoder)),
+      &frame->src_buffer);
+
+  if (flow_ret != GST_FLOW_OK) {
+    GST_WARNING ("failed to get buffer");
+  }
+
+  return flow_ret;
 }
diff --git a/gst-libs/gst/video/gstbasevideodecoder.h b/gst-libs/gst/video/gstbasevideodecoder.h
index b6052f094..13b588605 100644
--- a/gst-libs/gst/video/gstbasevideodecoder.h
+++ b/gst-libs/gst/video/gstbasevideodecoder.h
@@ -20,11 +20,6 @@
 #ifndef _GST_BASE_VIDEO_DECODER_H_
 #define _GST_BASE_VIDEO_DECODER_H_
 
-#ifndef GST_USE_UNSTABLE_API
-#warning "GstBaseVideoDecoder is unstable API and may change in future."
-#warning "You can define GST_USE_UNSTABLE_API to avoid this warning."
-#endif
-
 #include <gst/video/gstbasevideocodec.h>
 
 G_BEGIN_DECLS
@@ -56,10 +51,9 @@ G_BEGIN_DECLS
 #define GST_BASE_VIDEO_DECODER_SRC_NAME     "src"
 
 /**
- * GST_BASE_VIDEO_DECODER_FLOW_NEED_DATA:
- *
- * Custom GstFlowReturn value indicating that more data is needed.
- */
+ *  * GST_BASE_VIDEO_DECODER_FLOW_NEED_DATA:
+ *   *
+ *    */
 #define GST_BASE_VIDEO_DECODER_FLOW_NEED_DATA GST_FLOW_CUSTOM_SUCCESS
 
 
@@ -81,6 +75,7 @@ struct _GstBaseVideoDecoder
   gboolean started;
 
   GstVideoState state;
+  GstSegment segment;
 
   gboolean sink_clipping;
 
@@ -102,33 +97,41 @@ struct _GstBaseVideoDecoder
   gdouble proportion;
   GstClockTime earliest_time;
 
-  GstBuffer *codec_data;
+  //GstBuffer *codec_data;
 
-  guint64 offset;
+  guint64 input_offset;
+  guint64 frame_offset;
   GstClockTime last_timestamp;
 
-  GstClockTime last_sink_timestamp;
-  GstClockTime last_sink_offset_end;
   guint64 base_picture_number;
 
   int field_index;
+
+  gboolean is_delta_unit;
+  gboolean packetized;
+
+  GList *timestamps;
 };
 
 struct _GstBaseVideoDecoderClass
 {
   GstBaseVideoCodecClass base_video_codec_class;
 
-  gboolean (*set_sink_caps) (GstBaseVideoDecoder *coder, GstCaps *caps);
+  gboolean (*set_format) (GstBaseVideoDecoder *coder, GstVideoFormat,
+      int width, int height, int fps_n, int fps_d,
+      int par_n, int par_d);
   gboolean (*start) (GstBaseVideoDecoder *coder);
   gboolean (*stop) (GstBaseVideoDecoder *coder);
   gboolean (*reset) (GstBaseVideoDecoder *coder);
   int (*scan_for_sync) (GstBaseVideoDecoder *decoder, gboolean at_eos,
       int offset, int n);
   GstFlowReturn (*parse_data) (GstBaseVideoDecoder *decoder, gboolean at_eos);
-  gboolean (*finish) (GstBaseVideoDecoder *coder, GstVideoFrame *frame);
-  GstFlowReturn (*handle_frame) (GstBaseVideoDecoder *coder, GstVideoFrame *frame);
+  GstFlowReturn (*finish) (GstBaseVideoDecoder *coder);
+  GstFlowReturn (*handle_frame) (GstBaseVideoDecoder *coder, GstVideoFrame *frame,
+				 GstClockTimeDiff deadline);
   GstFlowReturn (*shape_output) (GstBaseVideoDecoder *coder, GstVideoFrame *frame);
   GstCaps *(*get_caps) (GstBaseVideoDecoder *coder);
+
 };
 
 GType gst_base_video_decoder_get_type (void);
@@ -140,10 +143,13 @@ guint64 gst_base_video_decoder_get_timestamp_offset (GstBaseVideoDecoder *coder)
 
 GstVideoFrame *gst_base_video_decoder_get_frame (GstBaseVideoDecoder *coder,
     int frame_number);
+GstVideoFrame *gst_base_video_decoder_get_oldest_frame (GstBaseVideoDecoder *coder);
 void gst_base_video_decoder_add_to_frame (GstBaseVideoDecoder *base_video_decoder,
     int n_bytes);
 GstFlowReturn gst_base_video_decoder_finish_frame (GstBaseVideoDecoder *base_video_decoder,
     GstVideoFrame *frame);
+GstFlowReturn gst_base_video_decoder_skip_frame (GstBaseVideoDecoder * base_video_decoder,
+    GstVideoFrame * frame);
 GstFlowReturn gst_base_video_decoder_end_of_stream (GstBaseVideoDecoder *base_video_decoder,
     GstBuffer *buffer);
 GstFlowReturn
@@ -156,6 +162,8 @@ void gst_base_video_decoder_set_sync_point (GstBaseVideoDecoder *base_video_deco
 
 void gst_base_video_decoder_set_src_caps (GstBaseVideoDecoder *base_video_decoder);
 
+GstFlowReturn gst_base_video_decoder_alloc_src_frame (GstBaseVideoDecoder *base_video_decoder,
+    GstVideoFrame *frame);
 
 G_END_DECLS
 
diff --git a/gst-libs/gst/video/gstbasevideoencoder.c b/gst-libs/gst/video/gstbasevideoencoder.c
index 9daa6e7da..4d68c9ba4 100644
--- a/gst-libs/gst/video/gstbasevideoencoder.c
+++ b/gst-libs/gst/video/gstbasevideoencoder.c
@@ -35,6 +35,7 @@ static gboolean gst_base_video_encoder_sink_event (GstPad * pad,
     GstEvent * event);
 static GstFlowReturn gst_base_video_encoder_chain (GstPad * pad,
     GstBuffer * buf);
+//static GstFlowReturn gst_base_video_encoder_process (GstBaseVideoEncoder *base_video_encoder);
 static GstStateChangeReturn gst_base_video_encoder_change_state (GstElement *
     element, GstStateChange transition);
 static const GstQueryType *gst_base_video_encoder_get_query_types (GstPad *
@@ -42,21 +43,9 @@ static const GstQueryType *gst_base_video_encoder_get_query_types (GstPad *
 static gboolean gst_base_video_encoder_src_query (GstPad * pad,
     GstQuery * query);
 
-static void
-_do_init (GType object_type)
-{
-  const GInterfaceInfo preset_interface_info = {
-    NULL,                       /* interface_init */
-    NULL,                       /* interface_finalize */
-    NULL                        /* interface_data */
-  };
 
-  g_type_add_interface_static (object_type, GST_TYPE_PRESET,
-      &preset_interface_info);
-}
-
-GST_BOILERPLATE_FULL (GstBaseVideoEncoder, gst_base_video_encoder,
-    GstBaseVideoCodec, GST_TYPE_BASE_VIDEO_CODEC, _do_init);
+GST_BOILERPLATE (GstBaseVideoEncoder, gst_base_video_encoder, GstBaseVideoCodec,
+    GST_TYPE_BASE_VIDEO_CODEC);
 
 static void
 gst_base_video_encoder_base_init (gpointer g_class)
@@ -93,6 +82,7 @@ gst_base_video_encoder_init (GstBaseVideoEncoder * base_video_encoder,
   gst_pad_set_chain_function (pad, gst_base_video_encoder_chain);
   gst_pad_set_event_function (pad, gst_base_video_encoder_sink_event);
   gst_pad_set_setcaps_function (pad, gst_base_video_encoder_sink_setcaps);
+  //gst_pad_set_query_function (pad, gst_base_video_encoder_sink_query);
 
   pad = GST_BASE_VIDEO_CODEC_SRC_PAD (base_video_encoder);
 
@@ -105,7 +95,7 @@ gst_base_video_encoder_sink_setcaps (GstPad * pad, GstCaps * caps)
 {
   GstBaseVideoEncoder *base_video_encoder;
   GstBaseVideoEncoderClass *base_video_encoder_class;
-  gboolean res;
+  gboolean ret;
 
   base_video_encoder = GST_BASE_VIDEO_ENCODER (gst_pad_get_parent (pad));
   base_video_encoder_class =
@@ -115,14 +105,15 @@ gst_base_video_encoder_sink_setcaps (GstPad * pad, GstCaps * caps)
 
   gst_base_video_state_from_caps (&base_video_encoder->state, caps);
 
-  res = base_video_encoder_class->set_format (base_video_encoder,
+  ret = base_video_encoder_class->set_format (base_video_encoder,
       &base_video_encoder->state);
-
-  base_video_encoder_class->start (base_video_encoder);
+  if (ret) {
+    ret = base_video_encoder_class->start (base_video_encoder);
+  }
 
   g_object_unref (base_video_encoder);
 
-  return res;
+  return ret;
 }
 
 static void
@@ -130,6 +121,7 @@ gst_base_video_encoder_finalize (GObject * object)
 {
   GstBaseVideoEncoder *base_video_encoder;
   GstBaseVideoEncoderClass *base_video_encoder_class;
+  GList *g;
 
   g_return_if_fail (GST_IS_BASE_VIDEO_ENCODER (object));
   base_video_encoder = GST_BASE_VIDEO_ENCODER (object);
@@ -137,6 +129,16 @@ gst_base_video_encoder_finalize (GObject * object)
 
   GST_DEBUG ("finalize");
 
+  for (g = base_video_encoder->frames; g; g = g_list_next (g)) {
+    gst_base_video_codec_free_frame ((GstVideoFrame *) g->data);
+  }
+  g_list_free (base_video_encoder->frames);
+
+  if (base_video_encoder->caps) {
+    gst_caps_unref (base_video_encoder->caps);
+    base_video_encoder->caps = NULL;
+  }
+
   G_OBJECT_CLASS (parent_class)->finalize (object);
 }
 
@@ -154,18 +156,9 @@ gst_base_video_encoder_sink_event (GstPad * pad, GstEvent * event)
   switch (GST_EVENT_TYPE (event)) {
     case GST_EVENT_EOS:
     {
-      GstVideoFrame *frame;
-
-      frame = g_malloc0 (sizeof (GstVideoFrame));
-      frame->presentation_frame_number =
-          base_video_encoder->presentation_frame_number;
-      frame->presentation_duration = 0;
-      frame->is_eos = TRUE;
-      base_video_encoder->presentation_frame_number++;
-
-      base_video_encoder->frames =
-          g_list_append (base_video_encoder->frames, frame);
-      base_video_encoder_class->finish (base_video_encoder, frame);
+      if (base_video_encoder_class->finish) {
+        base_video_encoder_class->finish (base_video_encoder);
+      }
 
       ret =
           gst_pad_push_event (GST_BASE_VIDEO_CODEC_SRC_PAD (base_video_encoder),
@@ -188,10 +181,9 @@ gst_base_video_encoder_sink_event (GstPad * pad, GstEvent * event)
       if (format != GST_FORMAT_TIME)
         goto newseg_wrong_format;
 
-      GST_DEBUG ("new segment %" G_GINT64_FORMAT " %" G_GINT64_FORMAT, start,
-          position);
+      GST_DEBUG ("new segment %lld %lld", start, position);
 
-      gst_segment_set_newsegment_full (&base_video_encoder->state.segment,
+      gst_segment_set_newsegment_full (&base_video_encoder->segment,
           update, rate, applied_rate, format, start, stop, position);
 
       ret =
@@ -223,6 +215,8 @@ static const GstQueryType *
 gst_base_video_encoder_get_query_types (GstPad * pad)
 {
   static const GstQueryType query_types[] = {
+    //GST_QUERY_POSITION,
+    //GST_QUERY_DURATION,
     GST_QUERY_CONVERT,
     GST_QUERY_LATENCY,
     0
@@ -311,7 +305,6 @@ gst_base_video_encoder_chain (GstPad * pad, GstBuffer * buf)
   GstBaseVideoEncoder *base_video_encoder;
   GstBaseVideoEncoderClass *klass;
   GstVideoFrame *frame;
-  GstFlowReturn ret = GST_FLOW_OK;
 
   if (!gst_pad_is_negotiated (pad)) {
     return GST_FLOW_NOT_NEGOTIATED;
@@ -326,14 +319,16 @@ gst_base_video_encoder_chain (GstPad * pad, GstBuffer * buf)
     gint64 clip_start;
     gint64 clip_stop;
 
-    if (!gst_segment_clip (&base_video_encoder->state.segment,
+    if (!gst_segment_clip (&base_video_encoder->segment,
             GST_FORMAT_TIME, start, stop, &clip_start, &clip_stop)) {
       GST_DEBUG ("clipping to segment dropped frame");
       goto done;
     }
   }
 
-  frame = g_malloc0 (sizeof (GstVideoFrame));
+  frame =
+      gst_base_video_codec_new_frame (GST_BASE_VIDEO_CODEC
+      (base_video_encoder));
   frame->sink_buffer = buf;
   frame->presentation_timestamp = GST_BUFFER_TIMESTAMP (buf);
   frame->presentation_duration = GST_BUFFER_DURATION (buf);
@@ -344,12 +339,12 @@ gst_base_video_encoder_chain (GstPad * pad, GstBuffer * buf)
   base_video_encoder->frames =
       g_list_append (base_video_encoder->frames, frame);
 
-  ret = klass->handle_frame (base_video_encoder, frame);
+  klass->handle_frame (base_video_encoder, frame);
 
 done:
   g_object_unref (base_video_encoder);
 
-  return ret;
+  return GST_FLOW_OK;
 }
 
 static GstStateChangeReturn
@@ -423,18 +418,20 @@ gst_base_video_encoder_finish_frame (GstBaseVideoEncoder * base_video_encoder,
       g_list_remove (base_video_encoder->frames, frame);
 
   if (!base_video_encoder->set_output_caps) {
-    GstCaps *caps;
-
     if (base_video_encoder_class->get_caps) {
-      caps = base_video_encoder_class->get_caps (base_video_encoder);
+      base_video_encoder->caps =
+          base_video_encoder_class->get_caps (base_video_encoder);
     } else {
-      caps = gst_caps_new_simple ("video/unknown", NULL);
+      base_video_encoder->caps = gst_caps_new_simple ("video/unknown", NULL);
     }
-    base_video_encoder->caps = gst_caps_ref (caps);
-    gst_pad_set_caps (GST_BASE_VIDEO_CODEC_SRC_PAD (base_video_encoder), caps);
+    gst_pad_set_caps (GST_BASE_VIDEO_CODEC_SRC_PAD (base_video_encoder),
+        base_video_encoder->caps);
     base_video_encoder->set_output_caps = TRUE;
   }
 
+  gst_buffer_set_caps (GST_BUFFER (frame->src_buffer),
+      base_video_encoder->caps);
+
   if (base_video_encoder_class->shape_output) {
     ret = base_video_encoder_class->shape_output (base_video_encoder, frame);
   } else {
@@ -488,6 +485,9 @@ gst_base_video_encoder_set_latency (GstBaseVideoEncoder * base_video_encoder,
 
   base_video_encoder->min_latency = min_latency;
   base_video_encoder->max_latency = max_latency;
+
+  gst_element_post_message (GST_ELEMENT_CAST (base_video_encoder),
+      gst_message_new_latency (GST_OBJECT_CAST (base_video_encoder)));
 }
 
 void
@@ -505,17 +505,14 @@ gst_base_video_encoder_set_latency_fields (GstBaseVideoEncoder *
 }
 
 GstVideoFrame *
-gst_base_video_encoder_get_frame (GstBaseVideoEncoder * coder, int frame_number)
+gst_base_video_encoder_get_oldest_frame (GstBaseVideoEncoder *
+    base_video_encoder)
 {
   GList *g;
 
-  for (g = coder->frames; g; g = g_list_next (g)) {
-    GstVideoFrame *frame = g->data;
-
-    if (frame->system_frame_number == frame_number) {
-      return frame;
-    }
-  }
+  g = g_list_first (base_video_encoder->frames);
 
-  return NULL;
+  if (g == NULL)
+    return NULL;
+  return (GstVideoFrame *) (g->data);
 }
diff --git a/gst-libs/gst/video/gstbasevideoencoder.h b/gst-libs/gst/video/gstbasevideoencoder.h
index 7d60a64dd..761a9d707 100644
--- a/gst-libs/gst/video/gstbasevideoencoder.h
+++ b/gst-libs/gst/video/gstbasevideoencoder.h
@@ -20,11 +20,6 @@
 #ifndef _GST_BASE_VIDEO_ENCODER_H_
 #define _GST_BASE_VIDEO_ENCODER_H_
 
-#ifndef GST_USE_UNSTABLE_API
-#warning "GstBaseVideoEncoder is unstable API and may change in future."
-#warning "You can define GST_USE_UNSTABLE_API to avoid this warning."
-#endif
-
 #include <gst/video/gstbasevideocodec.h>
 #include <gst/video/gstbasevideoutils.h>
 
@@ -68,6 +63,7 @@ struct _GstBaseVideoEncoder
   GList *frames;
 
   GstVideoState state;
+  GstSegment segment;
 
   gboolean sink_clipping;
 
@@ -89,8 +85,8 @@ struct _GstBaseVideoEncoderClass
   gboolean (*set_format) (GstBaseVideoEncoder *coder, GstVideoState *state);
   gboolean (*start) (GstBaseVideoEncoder *coder);
   gboolean (*stop) (GstBaseVideoEncoder *coder);
-  gboolean (*finish) (GstBaseVideoEncoder *coder, GstVideoFrame *frame);
-  GstFlowReturn (*handle_frame) (GstBaseVideoEncoder *coder, GstVideoFrame *frame);
+  gboolean (*finish) (GstBaseVideoEncoder *coder);
+  gboolean (*handle_frame) (GstBaseVideoEncoder *coder, GstVideoFrame *frame);
   GstFlowReturn (*shape_output) (GstBaseVideoEncoder *coder, GstVideoFrame *frame);
   GstCaps *(*get_caps) (GstBaseVideoEncoder *coder);
 
@@ -106,6 +102,7 @@ guint64 gst_base_video_encoder_get_timestamp_offset (GstBaseVideoEncoder *coder)
 
 GstVideoFrame *gst_base_video_encoder_get_frame (GstBaseVideoEncoder *coder,
     int frame_number);
+GstVideoFrame *gst_base_video_encoder_get_oldest_frame (GstBaseVideoEncoder *coder);
 GstFlowReturn gst_base_video_encoder_finish_frame (GstBaseVideoEncoder *base_video_encoder,
     GstVideoFrame *frame);
 GstFlowReturn gst_base_video_encoder_end_of_stream (GstBaseVideoEncoder *base_video_encoder,
diff --git a/gst-libs/gst/video/gstbasevideoparse.c b/gst-libs/gst/video/gstbasevideoparse.c
index 78f34ab88..468ee6872 100644
--- a/gst-libs/gst/video/gstbasevideoparse.c
+++ b/gst-libs/gst/video/gstbasevideoparse.c
@@ -129,7 +129,7 @@ gst_base_video_parse_reset (GstBaseVideoParse * base_video_parse)
     base_video_parse->caps = NULL;
   }
 
-  gst_segment_init (&base_video_parse->state.segment, GST_FORMAT_TIME);
+  gst_segment_init (&base_video_parse->segment, GST_FORMAT_TIME);
   gst_adapter_clear (base_video_parse->input_adapter);
   gst_adapter_clear (base_video_parse->output_adapter);
 
@@ -278,8 +278,8 @@ gst_base_video_parse_src_query (GstPad * pad, GstQuery * query)
 
       time = gst_util_uint64_scale (base_parse->presentation_frame_number,
           base_parse->state.fps_n, base_parse->state.fps_d);
-      time += base_parse->state.segment.time;
-      GST_DEBUG ("query position %" G_GINT64_FORMAT, time);
+      time += base_parse->segment.time;
+      GST_DEBUG ("query position %lld", time);
       res = gst_base_video_encoded_video_convert (&base_parse->state,
           GST_FORMAT_TIME, time, &format, &value);
       if (!res)
@@ -484,9 +484,8 @@ gst_base_video_parse_sink_event (GstPad * pad, GstEvent * event)
       if (rate <= 0.0)
         goto newseg_wrong_rate;
 
-      GST_DEBUG ("newsegment %" G_GINT64_FORMAT " %" G_GINT64_FORMAT, start,
-          time);
-      gst_segment_set_newsegment (&base_video_parse->state.segment, update,
+      GST_DEBUG ("newsegment %lld %lld", start, time);
+      gst_segment_set_newsegment (&base_video_parse->segment, update,
           rate, format, start, stop, time);
 
       ret =
@@ -580,13 +579,6 @@ gst_base_video_parse_push_all (GstBaseVideoParse * base_video_parse,
   return ret;
 }
 
-static GstBuffer *
-gst_adapter_get_buffer (GstAdapter * adapter)
-{
-  return gst_buffer_ref (GST_BUFFER (adapter->buflist->data));
-
-}
-
 static GstFlowReturn
 gst_base_video_parse_chain (GstPad * pad, GstBuffer * buf)
 {
@@ -639,9 +631,9 @@ gst_base_video_parse_chain (GstPad * pad, GstBuffer * buf)
     }
   }
 
-  /* FIXME: use gst_adapter_prev_timestamp() here instead? */
   buffer = gst_adapter_get_buffer (base_video_parse->input_adapter);
 
+  //base_video_parse->buffer_timestamp = GST_BUFFER_TIMESTAMP (buffer);
   gst_buffer_unref (buffer);
 
   /* FIXME check klass->parse_data */
@@ -855,9 +847,9 @@ gst_base_video_parse_push (GstBaseVideoParse * base_video_parse,
   }
   gst_buffer_set_caps (buffer, base_video_parse->caps);
 
-  GST_DEBUG ("pushing ts=%" G_GINT64_FORMAT " dur=%" G_GINT64_FORMAT " off=%"
-      G_GINT64_FORMAT " off_end=%" G_GINT64_FORMAT,
-      GST_BUFFER_TIMESTAMP (buffer), GST_BUFFER_DURATION (buffer),
+  GST_DEBUG ("pushing ts=%lld dur=%lld off=%lld off_end=%lld",
+      GST_BUFFER_TIMESTAMP (buffer),
+      GST_BUFFER_DURATION (buffer),
       GST_BUFFER_OFFSET (buffer), GST_BUFFER_OFFSET_END (buffer));
 
   if (base_video_parse->discont) {
diff --git a/gst-libs/gst/video/gstbasevideoparse.h b/gst-libs/gst/video/gstbasevideoparse.h
index cdbcd27a4..5a1469f1f 100644
--- a/gst-libs/gst/video/gstbasevideoparse.h
+++ b/gst-libs/gst/video/gstbasevideoparse.h
@@ -20,11 +20,6 @@
 #ifndef _GST_BASE_VIDEO_PARSE_H_
 #define _GST_BASE_VIDEO_PARSE_H_
 
-#ifndef GST_USE_UNSTABLE_API
-#warning "GstBaseVideoParse is unstable API and may change in future."
-#warning "You can define GST_USE_UNSTABLE_API to avoid this warning."
-#endif
-
 #include <gst/video/gstbasevideocodec.h>
 #include <gst/video/gstbasevideoutils.h>
 
@@ -81,6 +76,7 @@ struct _GstBaseVideoParse
 
   GstVideoFrame *current_frame;
   GstVideoState state;
+  GstSegment segment;
   int distance_from_sync;
 
   gboolean sink_clipping;
diff --git a/gst-libs/gst/video/gstbasevideoutils.c b/gst-libs/gst/video/gstbasevideoutils.c
index 83d72c956..69f614b28 100644
--- a/gst-libs/gst/video/gstbasevideoutils.c
+++ b/gst-libs/gst/video/gstbasevideoutils.c
@@ -29,6 +29,21 @@ GST_DEBUG_CATEGORY_EXTERN (basevideo_debug);
 #define GST_CAT_DEFAULT basevideo_debug
 
 
+#if 0
+guint64
+gst_base_video_convert_bytes_to_frames (GstVideoState * state, guint64 bytes)
+{
+  return gst_util_uint64_scale_int (bytes, 1, state->bytes_per_picture);
+}
+
+guint64
+gst_base_video_convert_frames_to_bytes (GstVideoState * state, guint64 frames)
+{
+  return frames * state->bytes_per_picture;
+}
+#endif
+
+
 gboolean
 gst_base_video_rawvideo_convert (GstVideoState * state,
     GstFormat src_format, gint64 src_value,
@@ -113,8 +128,7 @@ gst_base_video_state_from_caps (GstVideoState * state, GstCaps * caps)
   gst_video_format_parse_caps (caps, &state->format,
       &state->width, &state->height);
 
-  if (!gst_video_parse_caps_framerate (caps, &state->fps_n, &state->fps_d))
-    return FALSE;
+  gst_video_parse_caps_framerate (caps, &state->fps_n, &state->fps_d);
 
   state->par_n = 1;
   state->par_d = 1;
@@ -136,15 +150,129 @@ gst_base_video_state_from_caps (GstVideoState * state, GstCaps * caps)
 }
 
 GstClockTime
-gst_video_state_get_timestamp (const GstVideoState * state, int frame_number)
+gst_video_state_get_timestamp (const GstVideoState * state,
+    GstSegment * segment, int frame_number)
 {
   if (frame_number < 0) {
-    return state->segment.start -
+    return segment->start -
         (gint64) gst_util_uint64_scale (-frame_number,
         state->fps_d * GST_SECOND, state->fps_n);
   } else {
-    return state->segment.start +
+    return segment->start +
         gst_util_uint64_scale (frame_number,
         state->fps_d * GST_SECOND, state->fps_n);
   }
 }
+
+/* gst adapter */
+
+static GSList *
+get_chunk (GstAdapter * adapter, int offset, int *skip)
+{
+  GSList *g;
+
+#if 1
+  if (skip)
+    *skip = 0;
+#endif
+
+  g_return_val_if_fail (offset >= 0, NULL);
+  g_return_val_if_fail (offset < adapter->size, NULL);
+
+  offset += adapter->skip;
+  g = adapter->buflist;
+  while (g) {
+    if (offset < GST_BUFFER_SIZE (GST_BUFFER_CAST (g->data))) {
+      if (skip)
+        *skip = offset;
+      return g;
+    }
+    offset -= GST_BUFFER_SIZE (GST_BUFFER_CAST (g->data));
+    g = g->next;
+  }
+
+  g_assert_not_reached ();
+}
+
+static int
+scan_fast (guint8 * data, guint32 pattern, guint32 mask, int n)
+{
+  int i;
+
+  pattern &= mask;
+  for (i = 0; i < n; i++) {
+    if ((GST_READ_UINT32_BE (data + i) & mask) == pattern) {
+      return i;
+    }
+  }
+  return n;
+}
+
+static gboolean
+scan_slow (GstAdapter * adapter, GSList * g, int skip, guint32 pattern,
+    guint32 mask)
+{
+  guint8 tmp[4];
+  int j;
+
+  pattern &= mask;
+  for (j = 0; j < 4; j++) {
+    tmp[j] = ((guint8 *) GST_BUFFER_DATA (GST_BUFFER_CAST (g->data)))[skip];
+    skip++;
+    if (skip >= GST_BUFFER_SIZE (GST_BUFFER_CAST (g->data))) {
+      g = g->next;
+      skip = 0;
+    }
+  }
+
+  return ((GST_READ_UINT32_BE (tmp) & mask) == pattern);
+}
+
+int
+gst_adapter_masked_scan_uint32_compat (GstAdapter * adapter, guint32 mask,
+    guint32 pattern, guint offset, guint n)
+{
+  GSList *g;
+  int j;
+  int k;
+  int skip;
+  int m;
+
+  g_return_val_if_fail (n >= 0, -1);
+  g_return_val_if_fail (offset >= 0, -1);
+  g_return_val_if_fail (offset + n + 4 <= adapter->size, -1);
+
+  g = get_chunk (adapter, offset, &skip);
+  j = 0;
+  while (j < n) {
+    m = MIN (GST_BUFFER_SIZE (GST_BUFFER_CAST (g->data)) - skip - 4, 0);
+    if (m > 0) {
+      k = scan_fast (GST_BUFFER_DATA (GST_BUFFER_CAST (g->data)) + skip,
+          pattern, mask, m);
+      if (k < m) {
+        return offset + j + k;
+      }
+      j += m;
+      skip += m;
+    } else {
+      if (scan_slow (adapter, g, skip, pattern, mask)) {
+        return offset + j;
+      }
+      j++;
+      skip++;
+    }
+    if (skip >= GST_BUFFER_SIZE (GST_BUFFER_CAST (g->data))) {
+      g = g->next;
+      skip = 0;
+    }
+  }
+
+  return -1;
+}
+
+GstBuffer *
+gst_adapter_get_buffer (GstAdapter * adapter)
+{
+  return gst_buffer_ref (GST_BUFFER_CAST (adapter->buflist->data));
+
+}
diff --git a/gst-libs/gst/video/gstbasevideoutils.h b/gst-libs/gst/video/gstbasevideoutils.h
index e832fe76d..47871dcff 100644
--- a/gst-libs/gst/video/gstbasevideoutils.h
+++ b/gst-libs/gst/video/gstbasevideoutils.h
@@ -20,11 +20,6 @@
 #ifndef _GST_BASE_VIDEO_UTILS_H_
 #define _GST_BASE_VIDEO_UTILS_H_
 
-#ifndef GST_USE_UNSTABLE_API
-#warning "The base video utils API is unstable and may change in future."
-#warning "You can define GST_USE_UNSTABLE_API to avoid this warning."
-#endif
-
 #include <gst/gst.h>
 #include <gst/video/video.h>
 #include <gst/base/gstadapter.h>
@@ -40,6 +35,8 @@ struct _GstVideoState
   int width, height;
   int fps_n, fps_d;
   int par_n, par_d;
+
+  gboolean have_interlaced;
   gboolean interlaced;
   gboolean top_field_first;
 
@@ -48,16 +45,18 @@ struct _GstVideoState
 
   int bytes_per_picture;
 
-  GstSegment segment;
+  //GstSegment segment;
 
   int picture_number;
+  GstBuffer *codec_data;
+
 };
 
 struct _GstVideoFrame
 {
-  guint64 decode_timestamp;
-  guint64 presentation_timestamp;
-  guint64 presentation_duration;
+  GstClockTime decode_timestamp;
+  GstClockTime presentation_timestamp;
+  GstClockTime presentation_duration;
 
   gint system_frame_number;
   gint decode_frame_number;
@@ -87,7 +86,11 @@ gboolean gst_base_video_state_from_caps (GstVideoState *state,
     GstCaps *caps);
 
 GstClockTime gst_video_state_get_timestamp (const GstVideoState *state,
-    int frame_number);
+    GstSegment *segment, int frame_number);
+
+int gst_adapter_masked_scan_uint32_compat (GstAdapter *adapter,
+    guint32 pattern, guint32 mask, guint offset, guint n);
+GstBuffer *gst_adapter_get_buffer (GstAdapter *adapter);
 
 G_END_DECLS