ges: multifilesrc support

* GESMultiFileSource class
* multifilesrc example
* Support multifile:// urls in uri asset
* start/stop index modification
* Doc

https://bugzilla.gnome.org/show_bug.cgi?id=719373

configure.ac

@@ -290,7 +290,7 @@ AG_GST_SET_PLUGINDIR
 
 dnl define an ERROR_CFLAGS Makefile variable
 AG_GST_SET_ERROR_CFLAGS($GST_GIT, [-Wmissing-declarations -Wmissing-prototypes -Wredundant-decls -Wundef \
-				   -Wwrite-strings -Wformat-nonliteral -Wformat-security -Wold-style-definition \
+				   -Wwrite-strings -Wformat-security -Wold-style-definition \
 				   -Winit-self -Wmissing-include-dirs -Waddress -Waggregate-return -Wno-multichar \
 				   -Wnested-externs])
 

docs/libs/ges-docs.sgml

@@ -78,6 +78,7 @@ platform as well as Windows. It is released under the GNU Library General Public
     <xi:include href="xml/ges-video-transition.xml"/>
     <xi:include href="xml/ges-audio-transition.xml"/>
     <xi:include href="xml/ges-image-source.xml"/>
+    <xi:include href="xml/ges-multi-file-source.xml"/>
     <xi:include href="xml/ges-effect.xml"/>
   </chapter>
 

docs/libs/ges-sections.txt

@@ -270,6 +270,23 @@ GESImageSourceClass
 ges_image_source_get_type
 </SECTION>
 
+<SECTION>
+<FILE>ges-multi-file-source</FILE>
+<TITLE>GESMultiFileSource</TITLE>
+GESMultiFileSource
+ges_multi_file_source_new
+<SUBSECTION Standard>
+GESMultiFileSourcePrivate
+GES_IS_MULTI_FILE_SOURCE
+GES_IS_MULTI_FILE_SOURCE_CLASS
+GES_MULTI_FILE_SOURCE
+GES_MULTI_FILE_SOURCE_CLASS
+GES_MULTI_FILE_SOURCE_GET_CLASS
+GES_TYPE_MULTI_FILE_SOURCE
+GESMultiFileSourceClass
+ges_multi_file_source_get_type
+</SECTION>
+
 <SECTION>
 <FILE>ges-transition</FILE>
 <TITLE>GESTransition</TITLE>

docs/libs/ges.types

@@ -25,6 +25,7 @@ ges_video_uri_source_get_type
 ges_audio_uri_source_get_type
 ges_track_get_type
 ges_image_source_get_type
+ges_multi_file_source_get_type
 ges_track_element_get_type
 ges_base_effect_get_type
 ges_effect_get_type

ges/Makefile.am

@@ -38,6 +38,7 @@ libges_@GST_API_VERSION@_la_SOURCES = 		\
 	ges-video-uri-source.c			\
 	ges-audio-uri-source.c	\
 	ges-image-source.c		\
+	ges-multi-file-source.c		\
 	ges-transition.c			\
 	ges-audio-transition.c		\
 	ges-video-transition.c		\
@@ -104,6 +105,7 @@ libges_@GST_API_VERSION@include_HEADERS = 	\
 	ges-video-uri-source.h			\
 	ges-audio-uri-source.h			\
 	ges-image-source.h		\
+	ges-multi-file-source.h		\
 	ges-transition.h			\
 	ges-audio-transition.h		\
 	ges-video-transition.h		\

ges/ges-internal.h

@@ -304,4 +304,16 @@ G_GNUC_INTERNAL GESImageSource     * ges_image_source_new      (gchar *uri);
 G_GNUC_INTERNAL GESTitleSource     * ges_title_source_new      (void);
 G_GNUC_INTERNAL GESVideoTestSource * ges_video_test_source_new (void);
 
+/******************************
+ *  GESMultiFile internal API *
+ ******************************/
+typedef struct GESMultiFileURI
+{
+  gchar *location;
+  gint start;
+  gint end;
+} GESMultiFileURI;
+
+G_GNUC_INTERNAL GESMultiFileURI * ges_multi_file_uri_new (const gchar * uri);
+
 #endif /* __GES_INTERNAL_H__ */

ges/ges-multi-file-source.c

@@ -0,0 +1,271 @@
+/* GStreamer Editing Services
+ * Copyright (C) 2013 Lubosz Sarnecki <lubosz@gmail.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+/**
+ * SECTION:ges-multi-file-source
+ * @short_description: outputs the video stream from a sequence of images.
+ *
+ * Outputs the video stream from a given image sequence. The start frame
+ * chosen will be determined by the in-point property on the track element.
+ */
+#include <stdlib.h>
+#include <string.h>
+#include "ges-internal.h"
+#include "ges-track-element.h"
+#include "ges-multi-file-source.h"
+#include "ges-extractable.h"
+#include "ges-uri-asset.h"
+#include "ges-internal.h"
+
+/* Extractable interface implementation */
+
+static gchar *
+ges_extractable_check_id (GType type, const gchar * id, GError ** error)
+{
+  return g_strdup (id);
+}
+
+static void
+ges_extractable_interface_init (GESExtractableInterface * iface)
+{
+  iface->check_id = ges_extractable_check_id;
+}
+
+G_DEFINE_TYPE_WITH_CODE (GESMultiFileSource, ges_multi_file_source,
+    GES_TYPE_VIDEO_SOURCE,
+    G_IMPLEMENT_INTERFACE (GES_TYPE_EXTRACTABLE,
+        ges_extractable_interface_init));
+
+struct _GESMultiFileSourcePrivate
+{
+  /*  Dummy variable */
+  void *nothing;
+};
+
+enum
+{
+  PROP_0,
+  PROP_URI
+};
+
+static void
+ges_multi_file_source_get_property (GObject * object, guint property_id,
+    GValue * value, GParamSpec * pspec)
+{
+  GESMultiFileSource *uriclip = GES_MULTI_FILE_SOURCE (object);
+
+  switch (property_id) {
+    case PROP_URI:
+      g_value_set_string (value, uriclip->uri);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+  }
+}
+
+static void
+ges_multi_file_source_set_property (GObject * object, guint property_id,
+    const GValue * value, GParamSpec * pspec)
+{
+  GESMultiFileSource *uriclip = GES_MULTI_FILE_SOURCE (object);
+
+  switch (property_id) {
+    case PROP_URI:
+      uriclip->uri = g_value_dup_string (value);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+  }
+}
+
+static void
+ges_multi_file_source_dispose (GObject * object)
+{
+  GESMultiFileSource *uriclip = GES_MULTI_FILE_SOURCE (object);
+
+  if (uriclip->uri)
+    g_free (uriclip->uri);
+
+  G_OBJECT_CLASS (ges_multi_file_source_parent_class)->dispose (object);
+}
+
+static void
+pad_added_cb (GstElement * decodebin, GstPad * pad, GstElement * bin)
+{
+  GstPad *srcpad;
+
+  srcpad = gst_ghost_pad_new ("src", pad);
+
+  gst_pad_set_active (srcpad, TRUE);
+  gst_element_add_pad (bin, srcpad);
+}
+
+/**
+  * ges_multi_file_uri_new: (skip)
+  *
+  * Reads start/stop index and location from a multifile uri.
+  *
+  */
+GESMultiFileURI *
+ges_multi_file_uri_new (const gchar * uri)
+{
+  gchar *colon = NULL;
+  gchar *at = NULL;
+  gchar *indices;
+  int charpos;
+  GESMultiFileURI *uri_data;
+  const int prefix_size = strlen (GES_MULTI_FILE_URI_PREFIX);
+
+  uri_data = malloc (sizeof (GESMultiFileURI));
+
+  uri_data->start = 0;
+  uri_data->end = -1;
+
+  at = strchr (uri, '@');
+  if (at != NULL) {
+    charpos = (int) (at - uri);
+    indices = g_strdup_printf ("%.*s", charpos, uri);
+    indices = &indices[prefix_size];
+    colon = strchr (indices, ':');
+    if (colon != NULL) {
+      charpos = (int) (colon - indices);
+      uri_data->end = atoi (colon + 1);
+      uri_data->start = atoi (g_strdup_printf ("%.*s", charpos, indices));
+      GST_DEBUG ("indices start: %d end %d\n", uri_data->start, uri_data->end);
+    } else {
+      GST_ERROR
+          ("Malformated multifile uri. You are using '@' and are missing ':'");
+    }
+    uri_data->location = at + 1;
+  } else {
+    uri_data->location = g_strdup (&uri[prefix_size]);
+  }
+  GST_DEBUG ("location: %s\n", uri_data->location);
+
+  return uri_data;
+}
+
+static GstElement *
+ges_multi_file_source_create_source (GESTrackElement * track_element)
+{
+  GESMultiFileSource *self;
+  GstElement *bin, *src, *decodebin;
+  GstCaps *disc_caps;
+  GstDiscovererStreamInfo *stream_info;
+  GValue fps = G_VALUE_INIT;
+  GstCaps *caps;
+  GESUriSourceAsset *asset;
+  GESMultiFileURI *uri_data;
+
+  self = (GESMultiFileSource *) track_element;
+
+  asset =
+      GES_URI_SOURCE_ASSET (ges_extractable_get_asset (GES_EXTRACTABLE (self)));
+
+  if (asset != NULL) {
+    stream_info = ges_uri_source_asset_get_stream_info (asset);
+    g_assert (stream_info);
+    disc_caps = gst_discoverer_stream_info_get_caps (stream_info);
+    caps = gst_caps_copy (disc_caps);
+    GST_DEBUG ("Got some nice caps %s", gst_caps_to_string (disc_caps));
+    gst_object_unref (stream_info);
+    gst_caps_unref (disc_caps);
+  } else {
+    caps = gst_caps_new_empty ();
+    GST_WARNING ("Could not extract asset.");
+  }
+
+  g_value_init (&fps, GST_TYPE_FRACTION);
+  gst_value_set_fraction (&fps, 25, 1);
+  gst_caps_set_value (caps, "framerate", &fps);
+
+  bin = GST_ELEMENT (gst_bin_new ("multi-image-bin"));
+  src = gst_element_factory_make ("multifilesrc", NULL);
+
+  uri_data = ges_multi_file_uri_new (self->uri);
+  g_object_set (src, "start-index", uri_data->start, "stop-index",
+      uri_data->end, "caps", caps, "location", uri_data->location, NULL);
+  g_free (uri_data);
+
+  decodebin = gst_element_factory_make ("decodebin", NULL);
+
+  gst_bin_add_many (GST_BIN (bin), src, decodebin, NULL);
+  gst_element_link_pads_full (src, "src", decodebin, "sink",
+      GST_PAD_LINK_CHECK_NOTHING);
+
+  g_signal_connect (G_OBJECT (decodebin), "pad-added",
+      G_CALLBACK (pad_added_cb), bin);
+
+  return bin;
+}
+
+static void
+ges_multi_file_source_class_init (GESMultiFileSourceClass * klass)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+  GESVideoSourceClass *source_class = GES_VIDEO_SOURCE_CLASS (klass);
+
+  g_type_class_add_private (klass, sizeof (GESMultiFileSourcePrivate));
+
+  object_class->get_property = ges_multi_file_source_get_property;
+  object_class->set_property = ges_multi_file_source_set_property;
+  object_class->dispose = ges_multi_file_source_dispose;
+
+  /**
+   * GESMultiFileSource:uri:
+   *
+   * The uri of the file/resource to use. You can set a start index,
+   * a stop index and a sequence pattern.
+   * The format is &lt;multifile://start:stop\@location-pattern&gt;.
+   * The pattern uses printf string formating.
+   *
+   * Example uris:
+   *
+   * multifile:///home/you/image\%03d.jpg
+   *
+   * multifile://20:50@/home/you/sequence/\%04d.png
+   *
+   */
+  g_object_class_install_property (object_class, PROP_URI,
+      g_param_spec_string ("uri", "URI", "multifile uri",
+          NULL, G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));
+  source_class->create_source = ges_multi_file_source_create_source;
+}
+
+static void
+ges_multi_file_source_init (GESMultiFileSource * self)
+{
+  self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self,
+      GES_TYPE_MULTI_FILE_SOURCE, GESMultiFileSourcePrivate);
+}
+
+/**
+ * ges_multi_file_source_new:
+ * @uri: the URI the source should control
+ *
+ * Creates a new #GESMultiFileSource for the provided @uri.
+ *
+ * Returns: A new #GESMultiFileSource.
+ */
+GESMultiFileSource *
+ges_multi_file_source_new (gchar * uri)
+{
+  return g_object_new (GES_TYPE_MULTI_FILE_SOURCE, "uri", uri,
+      "track-type", GES_TRACK_TYPE_VIDEO, NULL);
+}

ges/ges-multi-file-source.h

@@ -0,0 +1,72 @@
+/* GStreamer Editing Services
+ * Copyright (C) 2013 Lubosz Sarnecki <lubosz@gmail.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifndef _GES_MULTI_FILE_SOURCE
+#define _GES_MULTI_FILE_SOURCE
+
+#include <glib-object.h>
+#include <ges/ges-types.h>
+#include <ges/ges-video-source.h>
+
+G_BEGIN_DECLS
+#define GES_TYPE_MULTI_FILE_SOURCE ges_multi_file_source_get_type()
+#define GES_MULTI_FILE_SOURCE(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST ((obj), GES_TYPE_MULTI_FILE_SOURCE, GESMultiFileSource))
+#define ges_multi_file_source_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST ((klass), GES_TYPE_MULTI_FILE_SOURCE, GESMultiFileSourceClass))
+#define GES_IS_MULTI_FILE_SOURCE(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GES_TYPE_MULTI_FILE_SOURCE))
+#define GES_IS_MULTI_FILE_SOURCE_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_TYPE ((klass), GES_TYPE_MULTI_FILE_SOURCE))
+#define ges_multi_file_source_GET_CLASS(obj) \
+  (G_TYPE_INSTANCE_GET_CLASS ((obj), GES_TYPE_MULTI_FILE_SOURCE, GESMultiFileSourceClass))
+typedef struct _GESMultiFileSourcePrivate GESMultiFileSourcePrivate;
+
+/**
+ * GESMultiFileSource:
+ */
+struct _GESMultiFileSource
+{
+  /*< private > */
+  GESVideoSource parent;
+
+  gchar *uri;
+
+  GESMultiFileSourcePrivate *priv;
+
+  /* Padding for API extension */
+  gpointer _ges_reserved[GES_PADDING];
+};
+
+struct _GESMultiFileSourceClass
+{
+  GESVideoSourceClass parent_class;
+
+  /* Padding for API extension */
+  gpointer _ges_reserved[GES_PADDING];
+};
+
+GType ges_multi_file_source_get_type (void);
+
+GESMultiFileSource *ges_multi_file_source_new (gchar * uri);
+
+#define GES_MULTI_FILE_URI_PREFIX "multifile://"
+
+G_END_DECLS
+#endif /* _GES_MULTI_FILE_SOURCE */

ges/ges-types.h

@@ -119,6 +119,12 @@ typedef struct _GESAudioUriSourceClass GESAudioUriSourceClass;
 typedef struct _GESImageSource GESImageSource;
 typedef struct _GESImageSourceClass GESImageSourceClass;
 
+typedef struct _GESMultiFileSource GESMultiFileSource;
+typedef struct _GESMultiFileSourceClass GESMultiFileSourceClass;
+
+typedef struct _GESMultiFileClip GESMultiFileClip;
+typedef struct _GESMultiFileClipClass GESMultiFileClipClass;
+
 typedef struct _GESTransition GESTransition;
 typedef struct _GESTransitionClass GESTransitionClass;
 

ges/ges-uri-asset.c

@@ -438,7 +438,8 @@ ges_uri_clip_asset_new (const gchar * uri, GCancellable * cancellable,
 
 /**
  * ges_uri_clip_asset_request_sync:
- * @uri: The URI of the file for which to create a #GESUriClipAsset
+ * @uri: The URI of the file for which to create a #GESUriClipAsset.
+ * You can also use multi file uris for #GESMultiFileSource.
  * @error: (allow-none): An error to be set in case something wrong happens or %NULL
  *
  * Creates a #GESUriClipAsset for @uri syncronously. You should avoid
@@ -453,6 +454,7 @@ ges_uri_clip_asset_request_sync (const gchar * uri, GError ** error)
   GstDiscovererInfo *info;
   GstDiscoverer *discoverer;
   GESUriClipAsset *asset;
+  gchar *first_file, *first_file_uri;
 
   asset = GES_URI_CLIP_ASSET (ges_asset_request (GES_TYPE_URI_CLIP, uri,
           &lerror));
@@ -470,7 +472,22 @@ ges_uri_clip_asset_request_sync (const gchar * uri, GError ** error)
   asset = g_object_new (GES_TYPE_URI_CLIP_ASSET, "id", uri,
       "extractable-type", GES_TYPE_URI_CLIP, NULL);
   discoverer = GES_URI_CLIP_ASSET_GET_CLASS (asset)->sync_discoverer;
-  info = gst_discoverer_discover_uri (discoverer, uri, &lerror);
+
+  if (g_str_has_prefix (uri, GES_MULTI_FILE_URI_PREFIX)) {
+    GESMultiFileURI *uri_data;
+
+    uri_data = ges_multi_file_uri_new (uri);
+    first_file = g_strdup_printf (uri_data->location, uri_data->start);
+    first_file_uri = gst_filename_to_uri (first_file, &lerror);
+    info = gst_discoverer_discover_uri (discoverer, first_file_uri, &lerror);
+    GST_DEBUG ("Got multifile uri. Discovering first file %s", first_file_uri);
+    g_free (uri_data);
+    g_free (first_file_uri);
+    g_free (first_file);
+  } else {
+    info = gst_discoverer_discover_uri (discoverer, uri, &lerror);
+  }
+
   if (info == NULL || lerror != NULL) {
     gst_object_unref (asset);
     if (lerror)
@@ -552,8 +569,11 @@ _extract (GESAsset * asset, GError ** error)
     return NULL;
   }
 
-  if (GST_IS_DISCOVERER_VIDEO_INFO (priv->sinfo) &&
-      gst_discoverer_video_info_is_image ((GstDiscovererVideoInfo *)
+  if (g_str_has_prefix (priv->uri, GES_MULTI_FILE_URI_PREFIX)) {
+    trackelement =
+        GES_TRACK_ELEMENT (ges_multi_file_source_new (g_strdup (priv->uri)));
+  } else if (GST_IS_DISCOVERER_VIDEO_INFO (priv->sinfo)
+      && gst_discoverer_video_info_is_image ((GstDiscovererVideoInfo *)
           priv->sinfo))
     trackelement =
         GES_TRACK_ELEMENT (ges_image_source_new (g_strdup (priv->uri)));

ges/ges-uri-clip.c

@@ -36,6 +36,7 @@
 #include "ges-extractable.h"
 #include "ges-image-source.h"
 #include "ges-audio-test-source.h"
+#include "ges-multi-file-source.h"
 
 static void ges_extractable_interface_init (GESExtractableInterface * iface);
 
@@ -427,7 +428,10 @@ ges_uri_clip_create_track_element (GESClip * clip, GESTrackType type)
   GESUriClipPrivate *priv = GES_URI_CLIP (clip)->priv;
   GESTrackElement *res = NULL;
 
-  if (priv->is_image) {
+  if (g_str_has_prefix (priv->uri, GES_MULTI_FILE_URI_PREFIX)) {
+    GST_DEBUG ("Creating a GESMultiFileSource for %s", priv->uri);
+    res = (GESTrackElement *) ges_multi_file_source_new (priv->uri);
+  } else if (priv->is_image) {
     if (type != GES_TRACK_TYPE_VIDEO) {
       GST_DEBUG ("Object is still image, not adding any audio source");
       return NULL;

ges/ges.h

@@ -62,6 +62,7 @@
 #include <ges/ges-video-uri-source.h>
 #include <ges/ges-audio-uri-source.h>
 #include <ges/ges-image-source.h>
+#include <ges/ges-multi-file-source.h>
 #include <ges/ges-video-test-source.h>
 #include <ges/ges-audio-test-source.h>
 #include <ges/ges-title-source.h>

tests/examples/.gitignore

@@ -8,4 +8,5 @@ simple1
 text_properties
 transition
 thumbnails
-overlays
+overlays
+multifilesrc

tests/examples/Makefile.am

@@ -16,6 +16,7 @@ noinst_PROGRAMS = 	\
 	overlays	\
 	text_properties	\
 	assets \
+	multifilesrc \
 	$(graphical)
 
 AM_CFLAGS =  -I$(top_srcdir) $(GST_PBUTILS_CFLAGS) $(GST_CFLAGS) $(GTK_CFLAGS)

tests/examples/multifilesrc.c

@@ -0,0 +1,92 @@
+/* GStreamer Editing Services
+ * Copyright (C) 2013 Lubosz Sarnecki <lubosz@gmail.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#include <stdlib.h>
+#include <ges/ges.h>
+
+/* A image sequence test */
+int
+main (int argc, gchar ** argv)
+{
+  GError *err = NULL;
+  GOptionContext *ctx;
+  GESPipeline *pipeline;
+  GESTimeline *timeline;
+  GESAsset *asset;
+  GESLayer *layer;
+  GMainLoop *mainloop;
+  GESTrack *track;
+
+  gint duration = 10;
+  gchar *filepattern = NULL;
+
+  GOptionEntry options[] = {
+    {"duration", 'd', 0, G_OPTION_ARG_INT, &duration,
+        "duration to use from the file (in seconds, default:10s)", "seconds"},
+    {"pattern-url", 'u', 0, G_OPTION_ARG_FILENAME, &filepattern,
+          "Pattern of the files. i.e. multifile:///foo/%04d.jpg",
+        "pattern-url"},
+    {NULL}
+  };
+
+  ctx = g_option_context_new ("- Plays an image sequence");
+  g_option_context_add_main_entries (ctx, options, NULL);
+  g_option_context_add_group (ctx, gst_init_get_option_group ());
+
+  if (!g_option_context_parse (ctx, &argc, &argv, &err)) {
+    g_print ("Error initializing %s\n", err->message);
+    exit (1);
+  }
+
+  if (filepattern == NULL) {
+    g_print ("%s", g_option_context_get_help (ctx, TRUE, NULL));
+    exit (0);
+  }
+  g_option_context_free (ctx);
+
+  gst_init (&argc, &argv);
+  ges_init ();
+
+  timeline = ges_timeline_new ();
+  track = GES_TRACK (ges_video_track_new ());
+  ges_timeline_add_track (timeline, track);
+
+  layer = ges_layer_new ();
+  if (!ges_timeline_add_layer (timeline, layer))
+    return -1;
+
+  asset = GES_ASSET (ges_uri_clip_asset_request_sync (filepattern, &err));
+
+  ges_layer_add_asset (layer, asset, 0, 0, 5 * GST_SECOND,
+      GES_TRACK_TYPE_VIDEO);
+
+  pipeline = ges_pipeline_new ();
+
+  if (!ges_pipeline_set_timeline (pipeline, timeline))
+    return -1;
+
+  gst_element_set_state (GST_ELEMENT (pipeline), GST_STATE_PLAYING);
+
+  mainloop = g_main_loop_new (NULL, FALSE);
+
+  g_timeout_add_seconds (4, (GSourceFunc) g_main_loop_quit, mainloop);
+  g_main_loop_run (mainloop);
+
+  return 0;
+}