+ GstStructure *s;
+
+ g_return_val_if_fail (stream_id != NULL, NULL);
+
+ s = gst_structure_new_id (GST_QUARK (EVENT_STREAM_START),
+ GST_QUARK (STREAM_ID), G_TYPE_STRING, stream_id,
+ GST_QUARK (FLAGS), GST_TYPE_STREAM_FLAGS, GST_STREAM_FLAG_NONE, NULL);
+
+ return gst_event_new_custom (GST_EVENT_STREAM_START, s);
+}
+
+/**
+ * gst_event_parse_stream_start:
+ * @event: a stream-start event.
+ * @stream_id: (out) (transfer none): pointer to store the stream-id
+ *
+ * Parse a stream-id @event and store the result in the given @stream_id
+ * location. The string stored in @stream_id must not be modified and will
+ * remain valid only until @event gets freed. Make a copy if you want to
+ * modify it or store it for later use.
+ */
+void
+gst_event_parse_stream_start (GstEvent * event, const gchar ** stream_id)
+{
+ const GstStructure *structure;
+ const GValue *val;
+
+ g_return_if_fail (event != NULL);
+ g_return_if_fail (GST_EVENT_TYPE (event) == GST_EVENT_STREAM_START);
+
+ structure = gst_event_get_structure (event);
+ val = gst_structure_id_get_value (structure, GST_QUARK (STREAM_ID));
+
+ if (stream_id)
+ *stream_id = g_value_get_string (val);
+}
+
+/**
+ * gst_event_set_stream:
+ * @event: a stream-start event
+ * @stream: (transfer none): the stream object to set
+ *
+ * Set the @stream on the stream-start @event
+ *
+ * Since: 1.10
+ */
+void
+gst_event_set_stream (GstEvent * event, GstStream * stream)
+{
+ g_return_if_fail (event != NULL);
+ g_return_if_fail (GST_EVENT_TYPE (event) == GST_EVENT_STREAM_START);
+ g_return_if_fail (gst_event_is_writable (event));
+
+ gst_structure_id_set (GST_EVENT_STRUCTURE (event),
+ GST_QUARK (STREAM), GST_TYPE_STREAM, stream, NULL);
+}
+
+/**
+ * gst_event_parse_stream:
+ * @event: a stream-start event
+ * @stream: (out) (transfer full): address of variable to store the stream
+ *
+ * Parse a stream-start @event and extract the #GstStream from it.
+ *
+ * Since: 1.10
+ */
+void
+gst_event_parse_stream (GstEvent * event, GstStream ** stream)
+{
+ g_return_if_fail (event != NULL);
+ g_return_if_fail (GST_EVENT_TYPE (event) == GST_EVENT_STREAM_START);
+
+ if (stream) {
+ gst_structure_id_get (GST_EVENT_STRUCTURE (event),
+ GST_QUARK (STREAM), GST_TYPE_STREAM, stream, NULL);
+ }
+
+}
+
+/**
+ * gst_event_set_stream_flags:
+ * @event: a stream-start event
+ * @flags: the stream flags to set
+ *
+ * Since: 1.2
+ */
+void
+gst_event_set_stream_flags (GstEvent * event, GstStreamFlags flags)
+{
+ g_return_if_fail (event != NULL);
+ g_return_if_fail (GST_EVENT_TYPE (event) == GST_EVENT_STREAM_START);
+ g_return_if_fail (gst_event_is_writable (event));
+
+ gst_structure_id_set (GST_EVENT_STRUCTURE (event),
+ GST_QUARK (FLAGS), GST_TYPE_STREAM_FLAGS, flags, NULL);
+}
+
+/**
+ * gst_event_parse_stream_flags:
+ * @event: a stream-start event
+ * @flags: (out): address of variable where to store the stream flags
+ *
+ * Since: 1.2
+ */
+void
+gst_event_parse_stream_flags (GstEvent * event, GstStreamFlags * flags)
+{
+ g_return_if_fail (event != NULL);
+ g_return_if_fail (GST_EVENT_TYPE (event) == GST_EVENT_STREAM_START);
+
+ if (flags) {
+ gst_structure_id_get (GST_EVENT_STRUCTURE (event),
+ GST_QUARK (FLAGS), GST_TYPE_STREAM_FLAGS, flags, NULL);
+ }
+}
+
+/**
+ * gst_event_set_group_id:
+ * @event: a stream-start event
+ * @group_id: the group id to set
+ *
+ * All streams that have the same group id are supposed to be played
+ * together, i.e. all streams inside a container file should have the
+ * same group id but different stream ids. The group id should change
+ * each time the stream is started, resulting in different group ids
+ * each time a file is played for example.
+ *
+ * Use gst_util_group_id_next() to get a new group id.
+ *
+ * Since: 1.2
+ */
+void
+gst_event_set_group_id (GstEvent * event, guint group_id)
+{
+ g_return_if_fail (event != NULL);
+ g_return_if_fail (GST_EVENT_TYPE (event) == GST_EVENT_STREAM_START);
+ g_return_if_fail (gst_event_is_writable (event));
+
+ gst_structure_id_set (GST_EVENT_STRUCTURE (event),
+ GST_QUARK (GROUP_ID), G_TYPE_UINT, group_id, NULL);
+}
+
+/**
+ * gst_event_parse_group_id:
+ * @event: a stream-start event
+ * @group_id: (out): address of variable where to store the group id
+ *
+ * Returns: %TRUE if a group id was set on the event and could be parsed,
+ * %FALSE otherwise.
+ *
+ * Since: 1.2
+ */
+gboolean
+gst_event_parse_group_id (GstEvent * event, guint * group_id)
+{
+ g_return_val_if_fail (event != NULL, FALSE);
+ g_return_val_if_fail (GST_EVENT_TYPE (event) == GST_EVENT_STREAM_START,
+ FALSE);
+
+ if (group_id) {
+ return gst_structure_id_get (GST_EVENT_STRUCTURE (event),
+ GST_QUARK (GROUP_ID), G_TYPE_UINT, group_id, NULL);
+ }
+
+ return TRUE;
+}
+
+/**
+ * gst_event_new_stream_collection:
+ * @collection: Active collection for this data flow
+ *
+ * Create a new STREAM_COLLECTION event. The stream collection event can only
+ * travel downstream synchronized with the buffer flow.
+ *
+ * Source elements, demuxers and other elements that manage collections
+ * of streams and post #GstStreamCollection messages on the bus also send
+ * this event downstream on each pad involved in the collection, so that
+ * activation of a new collection can be tracked through the downstream
+ * data flow.
+ *
+ * Returns: (transfer full): the new STREAM_COLLECTION event.
+ *
+ * Since: 1.10
+ */
+GstEvent *
+gst_event_new_stream_collection (GstStreamCollection * collection)
+{
+ GstStructure *s;
+
+ g_return_val_if_fail (collection != NULL, NULL);
+ g_return_val_if_fail (GST_IS_STREAM_COLLECTION (collection), NULL);
+
+ s = gst_structure_new_id (GST_QUARK (EVENT_STREAM_COLLECTION),
+ GST_QUARK (COLLECTION), GST_TYPE_STREAM_COLLECTION, collection, NULL);
+
+ return gst_event_new_custom (GST_EVENT_STREAM_COLLECTION, s);
+}
+
+/**
+ * gst_event_parse_stream_collection:
+ * @event: a stream-collection event
+ * @collection: (out): pointer to store the collection
+ *
+ * Retrieve new #GstStreamCollection from STREAM_COLLECTION event @event.
+ *
+ * Since: 1.10
+ */
+void
+gst_event_parse_stream_collection (GstEvent * event,
+ GstStreamCollection ** collection)
+{
+ const GstStructure *structure;
+
+ g_return_if_fail (event != NULL);
+ g_return_if_fail (GST_EVENT_TYPE (event) == GST_EVENT_STREAM_COLLECTION);
+
+ structure = gst_event_get_structure (event);
+
+ if (collection) {
+ gst_structure_id_get (structure,
+ GST_QUARK (COLLECTION), GST_TYPE_STREAM_COLLECTION, collection, NULL);
+ }