From 26a16e00a3d7dd38c15993bd4bdba25a6ec4ae50 Mon Sep 17 00:00:00 2001
From: Julien Moutte <julien@moutte.net>
Date: Mon, 15 Sep 2003 17:21:31 +0000
Subject: [PATCH] Fixing gst_element_error calls

Original commit message from CVS:
Fixing gst_element_error calls
---
 sys/v4l/gstv4lelement.c      |   4 +-
 sys/v4l/gstv4lmjpegsink.c    |   8 ++-
 sys/v4l/gstv4lmjpegsrc.c     |  10 +--
 sys/v4l/gstv4lsrc.c          |  10 +--
 sys/v4l/v4l-overlay_calls.c  |  25 ++++---
 sys/v4l/v4l_calls.c          | 112 +++++++++++++++----------------
 sys/v4l/v4l_calls.h          |  49 ++++++++------
 sys/v4l/v4lmjpegsink_calls.c |  80 ++++++++++++----------
 sys/v4l/v4lmjpegsrc_calls.c  | 124 ++++++++++++++++++++---------------
 sys/v4l/v4lsrc_calls.c       |  70 +++++++++++---------
 10 files changed, 278 insertions(+), 214 deletions(-)

diff --git a/sys/v4l/gstv4lelement.c b/sys/v4l/gstv4lelement.c
index 62b85331e7..e2ec6bbe31 100644
--- a/sys/v4l/gstv4lelement.c
+++ b/sys/v4l/gstv4lelement.c
@@ -140,7 +140,7 @@ gst_v4l_get_attribute (GstElement  *element,
       return gst_v4l_get_audio(v4lelement, n, value);
   }
 
-  gst_element_error(element, "Unknown attribute %s", name);
+  g_warning("Unknown attribute %s", name);
   return FALSE;
 }
 
@@ -170,7 +170,7 @@ gst_v4l_set_attribute (GstElement  *element,
       return gst_v4l_set_audio(v4lelement, n, value);
   }
 
-  gst_element_error(element, "Unknown attribute %s", name);
+  g_warning("Unknown attribute %s", name);
   return FALSE;
 }
 
diff --git a/sys/v4l/gstv4lmjpegsink.c b/sys/v4l/gstv4lmjpegsink.c
index b1103a0e9b..64bcf7aa69 100644
--- a/sys/v4l/gstv4lmjpegsink.c
+++ b/sys/v4l/gstv4lmjpegsink.c
@@ -294,9 +294,11 @@ gst_v4lmjpegsink_chain (GstPad    *pad,
     /* check size */
     if (GST_BUFFER_SIZE(buf) > v4lmjpegsink->breq.size)
     {
-      gst_element_error(GST_ELEMENT(v4lmjpegsink),
-        "Buffer too big (%d KB), max. buffersize is %d KB",
-        GST_BUFFER_SIZE(buf)/1024, v4lmjpegsink->breq.size/1024);
+      gst_element_error(GST_ELEMENT(v4lmjpegsink), GST_ERROR_UNKNOWN,
+        g_strdup(_("An unknown error occured")),
+        g_strdup_printf("Buffer too big (%d KB), max. buffersize is %lu KB",
+                        GST_BUFFER_SIZE(buf)/1024,
+			v4lmjpegsink->breq.size/1024));
       return;
     }
 
diff --git a/sys/v4l/gstv4lmjpegsrc.c b/sys/v4l/gstv4lmjpegsrc.c
index 73582890ad..4285155ed8 100644
--- a/sys/v4l/gstv4lmjpegsrc.c
+++ b/sys/v4l/gstv4lmjpegsrc.c
@@ -502,8 +502,9 @@ gst_v4lmjpegsrc_get (GstPad *pad)
   buf = gst_buffer_new_from_pool(v4lmjpegsrc->bufferpool, 0, 0);
   if (!buf)
   {
-    gst_element_error(GST_ELEMENT(v4lmjpegsrc),
-      "Failed to create a new GstBuffer");
+    gst_element_error(GST_ELEMENT(v4lmjpegsrc), GST_ERROR_UNKNOWN,
+      g_strdup(_("An unknown error occured")),
+      g_strdup("Failed to create a new GstBuffer"));
     return NULL;
   }
 
@@ -840,8 +841,9 @@ gst_v4lmjpegsrc_buffer_free (GstBufferPool *pool, GstBuffer *buf, gpointer user_
     }
 
   if (n == v4lmjpegsrc->breq.count)
-    gst_element_error(GST_ELEMENT(v4lmjpegsrc),
-      "Couldn't find the buffer");
+    gst_element_error(GST_ELEMENT(v4lmjpegsrc), GST_ERROR_UNKNOWN,
+      g_strdup(_("An unknown error occured")),
+      g_strdup("Couldn't find the buffer"));
 
   /* free the buffer struct et all */
   gst_buffer_default_free(buf);
diff --git a/sys/v4l/gstv4lsrc.c b/sys/v4l/gstv4lsrc.c
index b3dc4c141f..c0c95fa5e6 100644
--- a/sys/v4l/gstv4lsrc.c
+++ b/sys/v4l/gstv4lsrc.c
@@ -578,8 +578,9 @@ gst_v4lsrc_get (GstPad *pad)
   buf = gst_buffer_new_from_pool(v4lsrc->bufferpool, 0, 0);
   if (!buf)
   {
-    gst_element_error(GST_ELEMENT(v4lsrc),
-      "Failed to create a new GstBuffer");
+    gst_element_error(GST_ELEMENT(v4lsrc), GST_ERROR_INTERNAL,
+      g_strdup(_("An internal error occured")),
+      g_strdup("Failed to create a new GstBuffer"));
     return NULL;
   }
 
@@ -811,8 +812,9 @@ gst_v4lsrc_buffer_free (GstBufferPool *pool, GstBuffer *buf, gpointer user_data)
     }
 
   if (n == v4lsrc->mbuf.frames)
-    gst_element_error(GST_ELEMENT(v4lsrc),
-      "Couldn\'t find the buffer");
+    gst_element_error(GST_ELEMENT(v4lsrc), GST_ERROR_INTERNAL,
+      g_strdup(_("An internal error occured")),
+      g_strdup("Couldn\'t find the buffer"));
 
   /* free struct */
   gst_buffer_default_free(buf);
diff --git a/sys/v4l/v4l-overlay_calls.c b/sys/v4l/v4l-overlay_calls.c
index 902487c54d..500de94cfc 100644
--- a/sys/v4l/v4l-overlay_calls.c
+++ b/sys/v4l/v4l-overlay_calls.c
@@ -59,15 +59,18 @@ gst_v4l_set_overlay (GstV4lElement *v4lelement,
   switch (system(buff))
   {
     case -1:
-      gst_element_error(GST_ELEMENT(v4lelement),
-        "Could not start v4l-conf: %s", g_strerror(errno));
+      gst_element_error(GST_ELEMENT(v4lelement), GST_ERROR_UNKNOWN,
+        g_strdup(_("Unknown error occured")),
+        g_strdup_printf("Could not start v4l-conf: %s", g_strerror(errno)));
       g_free(buff);
       return FALSE;
     case 0:
       break;
     default:
-      gst_element_error(GST_ELEMENT(v4lelement),
-        "v4l-conf failed to run correctly: %s", g_strerror(errno));
+      gst_element_error(GST_ELEMENT(v4lelement), GST_ERROR_UNKNOWN,
+        g_strdup(_("Unknown error occured")),
+        g_strdup_printf("v4l-conf failed to run correctly: %s",
+		        g_strerror(errno)));
       g_free(buff);
       return FALSE;
   }
@@ -120,9 +123,10 @@ gst_v4l_set_window (GstElement        *element,
 
   if (ioctl(v4lelement->video_fd, VIDIOCSWIN, &vwin) < 0)
   {
-    gst_element_error(GST_ELEMENT(v4lelement),
-      "Failed to set the video window: %s",
-      g_strerror(errno));
+    gst_element_error(GST_ELEMENT(v4lelement), GST_ERROR_DEVICE,
+      g_strdup (_("Unable to set parameters on video device")),
+      g_strdup_printf("Failed to set the video window: %s",
+                      g_strerror(errno)));
     return FALSE;
   }
 
@@ -148,9 +152,10 @@ gst_v4l_enable_overlay (GstV4lElement *v4lelement,
 
   if (ioctl(v4lelement->video_fd, VIDIOCCAPTURE, &doit) < 0)
   {
-    gst_element_error(GST_ELEMENT(v4lelement),
-      "Failed to %s overlay display: %s",
-      enable?"enable":"disable", g_strerror(errno));
+    gst_element_error(GST_ELEMENT(v4lelement), GST_ERROR_DEVICE,
+      g_strdup(_("Unable to set parameters on video device")),
+      g_strdup_printf("Failed to %s overlay display: %s",
+                      enable?"enable":"disable", g_strerror(errno)));
     return FALSE;
   }
 
diff --git a/sys/v4l/v4l_calls.c b/sys/v4l/v4l_calls.c
index 1c2317504b..312fd57e98 100644
--- a/sys/v4l/v4l_calls.c
+++ b/sys/v4l/v4l_calls.c
@@ -74,9 +74,10 @@ gst_v4l_get_capabilities (GstV4lElement *v4lelement)
 
   if (ioctl(v4lelement->video_fd, VIDIOCGCAP, &(v4lelement->vcap)) < 0)
   {
-    gst_element_error(GST_ELEMENT(v4lelement),
-      "Error getting \'%s\' capabilities: %s",
-      v4lelement->videodev, g_strerror(errno));
+    gst_element_error(GST_ELEMENT(v4lelement), GST_ERROR_DEVICE,
+      g_strdup(_("Unable to get informations from video device")),
+      g_strdup_printf("Error getting \'%s\' capabilities: %s",
+                      v4lelement->videodev, g_strerror(errno)));
     return FALSE;
   }
 
@@ -108,9 +109,10 @@ gst_v4l_open (GstV4lElement *v4lelement)
   v4lelement->video_fd = open(v4lelement->videodev, O_RDWR);
   if (!GST_V4L_IS_OPEN(v4lelement))
   {
-    gst_element_error(GST_ELEMENT(v4lelement),
-      "Failed to open device (\'%s\'): %s",
-      v4lelement->videodev, g_strerror(errno));
+    gst_element_error(GST_ELEMENT(v4lelement), GST_ERROR_DEVICE,
+		      g_strdup(_("Unable to open video device")),
+                      g_strdup_printf("Failed to open device (\'%s\'): %s",
+                                      v4lelement->videodev, g_strerror(errno)));
     return FALSE;
   }
 
@@ -271,17 +273,19 @@ gst_v4l_set_chan_norm (GstV4lElement *v4lelement,
 
   if (ioctl(v4lelement->video_fd, VIDIOCSCHAN, &(v4lelement->vchan)) < 0)
   {
-    gst_element_error(GST_ELEMENT(v4lelement),
-      "Error setting the channel/norm settings: %s",
-      g_strerror(errno));
+    gst_element_error(GST_ELEMENT(v4lelement), GST_ERROR_DEVICE,
+      g_strdup(_("Unable to set parameters on video device")),
+      g_strdup_printf("Error setting the channel/norm settings: %s",
+                      g_strerror(errno)));
     return FALSE;
   }
 
   if (ioctl(v4lelement->video_fd, VIDIOCGCHAN, &(v4lelement->vchan)) < 0)
   {
-    gst_element_error(GST_ELEMENT(v4lelement),
-      "Error getting the channel/norm settings: %s",
-      g_strerror(errno));
+    gst_element_error(GST_ELEMENT(v4lelement),  GST_ERROR_DEVICE,
+      g_strdup(_("Unable to set parameters on video device")),
+      g_strdup_printf("Error getting the channel/norm settings: %s",
+                      g_strerror(errno)));
     return FALSE;
   }
 
@@ -325,9 +329,9 @@ gst_v4l_get_signal (GstV4lElement *v4lelement,
   tuner.tuner = 0;
   if (ioctl(v4lelement->video_fd, VIDIOCGTUNER, &tuner) < 0)
   {
-    gst_element_error(GST_ELEMENT(v4lelement),
-      "Error getting tuner signal: %s",
-      sys_errlist[errno]);
+    gst_element_error(GST_ELEMENT(v4lelement), GST_ERROR_DEVICE,
+      g_strdup(_("Unable to get informations from video device")),
+      g_strdup_printf("Error getting tuner signal: %s", sys_errlist[errno]));
     return FALSE;
   }
 
@@ -355,9 +359,9 @@ gst_v4l_get_frequency (GstV4lElement *v4lelement,
 
   if (ioctl(v4lelement->video_fd, VIDIOCGFREQ, frequency) < 0)
   {
-    gst_element_error(GST_ELEMENT(v4lelement),
-      "Error getting tuner frequency: %s",
-      g_strerror(errno));
+    gst_element_error(GST_ELEMENT(v4lelement), GST_ERROR_DEVICE,
+      g_strdup(_("Unable to get informations from video device")),
+      g_strdup_printf("Error getting tuner frequency: %s", g_strerror(errno)));
     return FALSE;
   }
 
@@ -383,9 +387,9 @@ gst_v4l_set_frequency (GstV4lElement *v4lelement,
 
   if (ioctl(v4lelement->video_fd, VIDIOCSFREQ, &frequency) < 0)
   {
-    gst_element_error(GST_ELEMENT(v4lelement),
-      "Error setting tuner frequency: %s",
-      g_strerror(errno));
+    gst_element_error(GST_ELEMENT(v4lelement), GST_ERROR_DEVICE,
+      g_strdup(_("Unable to set parameters on video device")),
+      g_strdup_printf("Error setting tuner frequency: %s", g_strerror(errno)));
     return FALSE;
   }
 
@@ -412,9 +416,10 @@ gst_v4l_get_picture (GstV4lElement     *v4lelement,
 
   if (ioctl(v4lelement->video_fd, VIDIOCGPICT, &vpic) < 0)
   {
-    gst_element_error(GST_ELEMENT(v4lelement),
-      "Error getting picture parameters: %s",
-      g_strerror(errno));
+    gst_element_error(GST_ELEMENT(v4lelement), GST_ERROR_DEVICE,
+      g_strdup(_("Unable to get informations from video device")),
+      g_strdup_printf("Error getting picture parameters: %s",
+                      g_strerror(errno)));
     return FALSE;
   }
 
@@ -433,9 +438,7 @@ gst_v4l_get_picture (GstV4lElement     *v4lelement,
       *value = vpic.colour;
       break;
     default:
-      gst_element_error(GST_ELEMENT(v4lelement),
-        "Error getting picture parameters: unknown type %d",
-        type);
+      g_warning("Error getting picture parameters: unknown type %d", type);
       return FALSE;
   }
 
@@ -462,9 +465,10 @@ gst_v4l_set_picture (GstV4lElement     *v4lelement,
 
   if (ioctl(v4lelement->video_fd, VIDIOCGPICT, &vpic) < 0)
   {
-    gst_element_error(GST_ELEMENT(v4lelement),
-      "Error getting picture parameters: %s",
-      g_strerror(errno));
+    gst_element_error(GST_ELEMENT(v4lelement), GST_ERROR_DEVICE,
+      g_strdup(_("Unable to get informations from video device")),
+      g_strdup_printf("Error getting picture parameters: %s",
+                      g_strerror(errno)));
     return FALSE;
   }
 
@@ -483,17 +487,16 @@ gst_v4l_set_picture (GstV4lElement     *v4lelement,
       vpic.colour = value;
       break;
     default:
-      gst_element_error(GST_ELEMENT(v4lelement),
-        "Error setting picture parameters: unknown type %d",
-        type);
+      g_warning("Error setting picture parameters: unknown type %d", type);
       return FALSE;
   }
 
   if (ioctl(v4lelement->video_fd, VIDIOCSPICT, &vpic) < 0)
   {
-    gst_element_error(GST_ELEMENT(v4lelement),
-      "Error setting picture parameters: %s",
-      g_strerror(errno));
+    gst_element_error(GST_ELEMENT(v4lelement), GST_ERROR_DEVICE,
+      g_strdup(_("Unable to set parameters on video device")),
+      g_strdup_printf("Error setting picture parameters: %s",
+                      g_strerror(errno)));
     return FALSE;
   }
 
@@ -538,9 +541,10 @@ gst_v4l_get_audio (GstV4lElement   *v4lelement,
 
   if (ioctl(v4lelement->video_fd, VIDIOCGAUDIO, &vau) < 0)
   {
-    gst_element_error(GST_ELEMENT(v4lelement),
-      "Error getting audio parameters: %s",
-      g_strerror(errno));
+    gst_element_error(GST_ELEMENT(v4lelement), GST_ERROR_DEVICE,
+      g_strdup(_("Unable to get informations from video device")),
+      g_strdup_printf("Error getting audio parameters: %s",
+                      g_strerror(errno)));
     return FALSE;
   }
 
@@ -556,9 +560,7 @@ gst_v4l_get_audio (GstV4lElement   *v4lelement,
       *value = vau.mode;
       break;
     default:
-      gst_element_error(GST_ELEMENT(v4lelement),
-        "Error getting audio parameters: unknown type %d",
-        type);
+      g_warning("Error getting audio parameters: unknown type %d", type);
       return FALSE;
   }
 
@@ -588,9 +590,10 @@ gst_v4l_set_audio (GstV4lElement   *v4lelement,
 
   if (ioctl(v4lelement->video_fd, VIDIOCGAUDIO, &vau) < 0)
   {
-    gst_element_error(GST_ELEMENT(v4lelement),
-      "Error getting audio parameters: %s",
-      g_strerror(errno));
+    gst_element_error(GST_ELEMENT(v4lelement), GST_ERROR_DEVICE,
+      g_strdup(_("Unable to get informations from video device")),
+      g_strdup_printf("Error getting audio parameters: %s",
+                      g_strerror(errno)));
     return FALSE;
   }
 
@@ -599,8 +602,8 @@ gst_v4l_set_audio (GstV4lElement   *v4lelement,
     case V4L_AUDIO_MUTE:
       if (!(vau.flags & VIDEO_AUDIO_MUTABLE))
       {
-        gst_element_error(GST_ELEMENT(v4lelement),
-          "Error setting audio mute: (un)setting mute is not supported");
+        g_warning("Error setting audio mute: " \
+		  "(un)setting mute is not supported");
         return FALSE;
       }
       if (value)
@@ -611,8 +614,8 @@ gst_v4l_set_audio (GstV4lElement   *v4lelement,
     case V4L_AUDIO_VOLUME:
       if (!(vau.flags & VIDEO_AUDIO_VOLUME))
       {
-        gst_element_error(GST_ELEMENT(v4lelement),
-          "Error setting audio volume: setting volume is not supported");
+        g_warning("Error setting audio volume: " \
+	          "setting volume is not supported");
         return FALSE;
       }
       vau.volume = value;
@@ -621,17 +624,16 @@ gst_v4l_set_audio (GstV4lElement   *v4lelement,
       vau.mode = value;
       break;
     default:
-      gst_element_error(GST_ELEMENT(v4lelement),
-        "Error setting audio parameters: unknown type %d",
-        type);
+      g_warning("Error setting audio parameters: unknown type %d", type);
       return FALSE;
   }
 
   if (ioctl(v4lelement->video_fd, VIDIOCSAUDIO, &vau) < 0)
   {
-    gst_element_error(GST_ELEMENT(v4lelement),
-      "Error setting audio parameters: %s",
-      g_strerror(errno));
+    gst_element_error(GST_ELEMENT(v4lelement), GST_ERROR_DEVICE,
+      g_strdup(_("Unable to set parameters on video device")),
+      g_strdup_printf("Error setting audio parameters: %s",
+      		      g_strerror(errno)));
     return FALSE;
   }
 
diff --git a/sys/v4l/v4l_calls.h b/sys/v4l/v4l_calls.h
index 3214e8a477..e437ce06d3 100644
--- a/sys/v4l/v4l_calls.h
+++ b/sys/v4l/v4l_calls.h
@@ -26,6 +26,7 @@
 extern "C" {
 #endif /* __cplusplus */
 
+#define _(string) (string)
 
 /* simple check whether the device is open */
 #define GST_V4L_IS_OPEN(v4lelement) \
@@ -43,7 +44,9 @@ extern "C" {
   if (v4lelement->video_fd <= 0)               \
   {                                            \
     gst_element_error(GST_ELEMENT(v4lelement), \
-      "Device is not open");                   \
+      GST_ERROR_DEVICE,			       \
+      g_strdup("Video device is not open"), \
+      g_strdup("Device is not open"));         \
     return FALSE;                              \
   }
 
@@ -52,35 +55,43 @@ extern "C" {
   if (v4lelement->video_fd != -1)              \
   {                                            \
     gst_element_error(GST_ELEMENT(v4lelement), \
-      "Device is open");                       \
+      GST_ERROR_DEVICE,                        \
+      g_strdup(_("Video device is open")),     \
+      g_strdup("Device is open"));             \
     return FALSE;                              \
   }
 
 /* checks whether the current v4lelement does video overlay */
 #define GST_V4L_CHECK_OVERLAY(v4lelement) \
-  if (!(v4lelement->vcap.type & VID_TYPE_OVERLAY)) \
-  {                                                \
-    gst_element_error(GST_ELEMENT(v4lelement),     \
-      "Device doesn't do overlay");               \
-    return FALSE;                                  \
+  if (!(v4lelement->vcap.type & VID_TYPE_OVERLAY))   \
+  {                                                  \
+    gst_element_error(GST_ELEMENT(v4lelement),       \
+      GST_ERROR_DEVICE,                              \
+      g_strdup(_("Video device doesn't do overlay")),\
+      g_strdup("Device doesn't do overlay"));        \
+    return FALSE;                                    \
   }
 
 /* checks whether we're in capture mode or not */
-#define GST_V4L_CHECK_ACTIVE(v4lelement) \
-  if (v4lelement->buffer == NULL)              \
-  {                                            \
-    gst_element_error(GST_ELEMENT(v4lelement), \
-      "Device is not in streaming mode");      \
-    return FALSE;                              \
+#define GST_V4L_CHECK_ACTIVE(v4lelement)                    \
+  if (v4lelement->buffer == NULL)                           \
+  {                                                         \
+    gst_element_error(GST_ELEMENT(v4lelement),              \
+      GST_ERROR_DEVICE,                                     \
+      g_strdup(_("Video device is not in streaming mode")), \
+      g_strdup("Device is not in streaming mode"));         \
+    return FALSE;                                           \
   }
 
 /* checks whether we're out of capture mode or not */
-#define GST_V4L_CHECK_NOT_ACTIVE(v4lelement) \
-  if (v4lelement->buffer != NULL)              \
-  {                                            \
-    gst_element_error(GST_ELEMENT(v4lelement), \
-      "Device is in streaming mode");          \
-    return FALSE;                              \
+#define GST_V4L_CHECK_NOT_ACTIVE(v4lelement)            \
+  if (v4lelement->buffer != NULL)                       \
+  {                                                     \
+    gst_element_error(GST_ELEMENT(v4lelement),          \
+      GST_ERROR_DEVICE,                                 \
+      g_strdup(_("Video device is in streaming mode")), \
+      g_strdup("Device is in streaming mode"));         \
+    return FALSE;                                       \
   }
 
 
diff --git a/sys/v4l/v4lmjpegsink_calls.c b/sys/v4l/v4lmjpegsink_calls.c
index c85dce559a..d97625d926 100644
--- a/sys/v4l/v4lmjpegsink_calls.c
+++ b/sys/v4l/v4lmjpegsink_calls.c
@@ -80,9 +80,10 @@ gst_v4lmjpegsink_sync_thread (void *arg)
     if (ioctl(GST_V4LELEMENT(v4lmjpegsink)->video_fd, MJPIOC_SYNC,
         &(v4lmjpegsink->bsync)) < 0)
     {
-      gst_element_error(GST_ELEMENT(v4lmjpegsink),
-        "Failed to sync on frame %d: %s",
-         frame, g_strerror(errno));
+      gst_element_error(GST_ELEMENT(v4lmjpegsink), GST_ERROR_DEVICE,
+        g_strdup(_("Unable to set parameters on video device")),
+        g_strdup_printf("Failed to sync on frame %d: %s",
+                        frame, g_strerror(errno)));
       g_mutex_lock(v4lmjpegsink->mutex_queued_frames);
       v4lmjpegsink->isqueued_queued_frames[frame] = -1;
       g_cond_broadcast(v4lmjpegsink->cond_queued_frames[frame]);
@@ -94,8 +95,9 @@ gst_v4lmjpegsink_sync_thread (void *arg)
       /* be sure that we're not confusing */
       if (frame != v4lmjpegsink->bsync.frame)
       {
-        gst_element_error(GST_ELEMENT(v4lmjpegsink),
-          "Internal error: frame number confusion");
+        gst_element_error(GST_ELEMENT(v4lmjpegsink), GST_ERROR_INTERNAL,
+          g_strdup(_("An internal error occured")),
+          g_strdup("Internal error: frame number confusion"));
         goto end;
       }
       g_mutex_lock(v4lmjpegsink->mutex_queued_frames);
@@ -129,9 +131,10 @@ gst_v4lmjpegsink_queue_frame (GstV4lMjpegSink *v4lmjpegsink,
   /* queue on this frame */
   if (ioctl(GST_V4LELEMENT(v4lmjpegsink)->video_fd, MJPIOC_QBUF_PLAY, &num) < 0)
   {
-    gst_element_error(GST_ELEMENT(v4lmjpegsink),
-      "Failed to queue frame %d: %s",
-      num, g_strerror(errno));
+    gst_element_error(GST_ELEMENT(v4lmjpegsink), GST_ERROR_DEVICE,
+      g_strdup(_("Unable to set parameters on video device")),
+      g_strdup_printf("Failed to queue frame %d: %s",
+                      num, g_strerror(errno)));
     return FALSE;
   }
 
@@ -226,9 +229,10 @@ gst_v4lmjpegsink_set_playback (GstV4lMjpegSink *v4lmjpegsink,
 
   if (ioctl(GST_V4LELEMENT(v4lmjpegsink)->video_fd, MJPIOC_G_PARAMS, &bparm) < 0)
   {
-    gst_element_error(GST_ELEMENT(v4lmjpegsink),
-      "Error getting playback parameters: %s",
-      g_strerror(errno));
+    gst_element_error(GST_ELEMENT(v4lmjpegsink), GST_ERROR_DEVICE,
+      g_strdup(_("Unable to get informations from video device")),
+      g_strdup_printf("Error getting playback parameters: %s",
+                      g_strerror(errno)));
     return FALSE;
   }
 
@@ -244,9 +248,10 @@ gst_v4lmjpegsink_set_playback (GstV4lMjpegSink *v4lmjpegsink,
 
   if (width > mw || height > mh)
   {
-    gst_element_error(GST_ELEMENT(v4lmjpegsink),
-      "Video dimensions (%dx%d) are larger than device max (%dx%d)",
-      width, height, mw, mh);
+    gst_element_error(GST_ELEMENT(v4lmjpegsink), GST_ERROR_UNKNOWN,
+      g_strdup(_("An unknown error occured")),
+      g_strdup_printf("Video dimensions (%dx%d) are larger than device max (%dx%d)",
+                      width, height, mw, mh));
     return FALSE;
   }
 
@@ -274,9 +279,10 @@ gst_v4lmjpegsink_set_playback (GstV4lMjpegSink *v4lmjpegsink,
   {
     if (height > mh/2)
     {
-      gst_element_error(GST_ELEMENT(v4lmjpegsink),
-        "Video dimensions (%dx%d) too large for non-interlaced playback (%dx%d)",
-        width, height, mw, mh/2);
+      gst_element_error(GST_ELEMENT(v4lmjpegsink), GST_ERROR_UNKNOWN,
+        g_strdup(_("An unknown error occured")),
+        g_strdup_printf("Video dimensions (%dx%d) too large for non-interlaced playback (%dx%d)",
+                        width, height, mw, mh/2));
       return FALSE;
     }
 
@@ -321,9 +327,10 @@ gst_v4lmjpegsink_set_playback (GstV4lMjpegSink *v4lmjpegsink,
 
   if (ioctl(GST_V4LELEMENT(v4lmjpegsink)->video_fd, MJPIOC_S_PARAMS, &bparm) < 0)
   {
-    gst_element_error(GST_ELEMENT(v4lmjpegsink),
-      "Error setting playback parameters: %s",
-      g_strerror(errno));
+    gst_element_error(GST_ELEMENT(v4lmjpegsink), GST_ERROR_DEVICE,
+      g_strdup(_("Unable to set parameters on video device")),
+      g_strdup_printf("Error setting playback parameters: %s",
+                      g_strerror(errno)));
     return FALSE;
   }
 
@@ -349,9 +356,10 @@ gst_v4lmjpegsink_playback_init (GstV4lMjpegSink *v4lmjpegsink)
   /* Request buffers */
   if (ioctl(GST_V4LELEMENT(v4lmjpegsink)->video_fd, MJPIOC_REQBUFS, &(v4lmjpegsink->breq)) < 0)
   {
-    gst_element_error(GST_ELEMENT(v4lmjpegsink),
-      "Error requesting video buffers: %s",
-      g_strerror(errno));
+    gst_element_error(GST_ELEMENT(v4lmjpegsink), GST_ERROR_DEVICE,
+      g_strdup(_("Unable to get informations from video device")),
+      g_strdup_printf("Error requesting video buffers: %s",
+                      g_strerror(errno)));
     return FALSE;
   }
 
@@ -364,9 +372,10 @@ gst_v4lmjpegsink_playback_init (GstV4lMjpegSink *v4lmjpegsink)
     PROT_READ|PROT_WRITE, MAP_SHARED, GST_V4LELEMENT(v4lmjpegsink)->video_fd, 0);
   if (GST_V4LELEMENT(v4lmjpegsink)->buffer == MAP_FAILED)
   {
-    gst_element_error(GST_ELEMENT(v4lmjpegsink),
-      "Error mapping video buffers: %s",
-      g_strerror(errno));
+    gst_element_error(GST_ELEMENT(v4lmjpegsink), GST_ERROR_UNKNOWN,
+      g_strdup(_("An unknown error occured")),
+      g_strdup_printf("Error mapping video buffers: %s",
+                      g_strerror(errno)));
     GST_V4LELEMENT(v4lmjpegsink)->buffer = NULL;
     return FALSE;
   }
@@ -377,18 +386,20 @@ gst_v4lmjpegsink_playback_init (GstV4lMjpegSink *v4lmjpegsink)
     malloc(sizeof(gint8) * v4lmjpegsink->breq.count);
   if (!v4lmjpegsink->isqueued_queued_frames)
   {
-    gst_element_error(GST_ELEMENT(v4lmjpegsink),
-      "Failed to create queue tracker: %s",
-      g_strerror(errno));
+    gst_element_error(GST_ELEMENT(v4lmjpegsink), GST_ERROR_UNKNOWN,
+      g_strdup(_("An unknown error occured")),
+      g_strdup_printf("Failed to create queue tracker: %s",
+                      g_strerror(errno)));
     return FALSE;
   }
   v4lmjpegsink->cond_queued_frames = (GCond **)
     malloc(sizeof(GCond *) * v4lmjpegsink->breq.count);
   if (!v4lmjpegsink->cond_queued_frames)
   {
-    gst_element_error(GST_ELEMENT(v4lmjpegsink),
-      "Failed to create queue condition holders: %s",
-      g_strerror(errno));
+    gst_element_error(GST_ELEMENT(v4lmjpegsink), GST_ERROR_UNKNOWN,
+      g_strdup(_("An unknown error occured")),
+      g_strdup_printf("Failed to create queue condition holders: %s",
+                      g_strerror(errno)));
     return FALSE;
   }
   for (n=0;n<v4lmjpegsink->breq.count;n++)
@@ -425,8 +436,9 @@ gst_v4lmjpegsink_playback_start (GstV4lMjpegSink *v4lmjpegsink)
       gst_v4lmjpegsink_sync_thread, (void *) v4lmjpegsink, TRUE, &error);
   if(!v4lmjpegsink->thread_queued_frames)
   {
-    gst_element_error(GST_ELEMENT(v4lmjpegsink),
-      "Failed to create sync thread: %s", error->message);
+    gst_element_error(GST_ELEMENT(v4lmjpegsink), GST_ERROR_UNKNOWN,
+      g_strdup(_("An unknown error occured")),
+      g_strdup_printf("Failed to create sync thread: %s", error->message));
     return FALSE;
   }
 
diff --git a/sys/v4l/v4lmjpegsrc_calls.c b/sys/v4l/v4lmjpegsrc_calls.c
index 4e1e3e5b64..00a884c824 100644
--- a/sys/v4l/v4lmjpegsrc_calls.c
+++ b/sys/v4l/v4lmjpegsrc_calls.c
@@ -70,9 +70,10 @@ gst_v4lmjpegsrc_queue_frame (GstV4lMjpegSrc *v4lmjpegsrc,
 
   if (ioctl(GST_V4LELEMENT(v4lmjpegsrc)->video_fd, MJPIOC_QBUF_CAPT, &num) < 0)
   {
-    gst_element_error(GST_ELEMENT(v4lmjpegsrc),
-      "Error queueing a buffer (%d): %s",
-      num, g_strerror(errno));
+    gst_element_error(GST_ELEMENT(v4lmjpegsrc), GST_ERROR_DEVICE,
+      g_strdup(_("Unable to set parameters on video device")),
+      g_strdup_printf("Error queueing a buffer (%d): %s",
+                      num, g_strerror(errno)));
     return FALSE;
   }
 
@@ -102,9 +103,10 @@ gst_v4lmjpegsrc_sync_next_frame (GstV4lMjpegSrc *v4lmjpegsrc,
   while (ioctl(GST_V4LELEMENT(v4lmjpegsrc)->video_fd,
                MJPIOC_SYNC, &(v4lmjpegsrc->bsync)) < 0) {
     if (errno != EINTR) {
-      gst_element_error(GST_ELEMENT(v4lmjpegsrc),
-        "Error syncing on a buffer: %s",
-        g_strerror(errno));
+      gst_element_error(GST_ELEMENT(v4lmjpegsrc), GST_ERROR_DEVICE,
+        g_strdup(_("Unable to set parameters on video device")),
+        g_strdup_printf("Error syncing on a buffer: %s",
+                        g_strerror(errno)));
       return FALSE;
     }
     DEBUG("Sync got interrupted");
@@ -151,9 +153,10 @@ gst_v4lmjpegsrc_set_input_norm (GstV4lMjpegSrc       *v4lmjpegsrc,
 
       if (ioctl(GST_V4LELEMENT(v4lmjpegsrc)->video_fd, MJPIOC_G_STATUS, &bstat) < 0)
       {
-        gst_element_error(GST_ELEMENT(v4lmjpegsrc),
-          "Error getting device status: %s",
-          g_strerror(errno));
+        gst_element_error(GST_ELEMENT(v4lmjpegsrc), GST_ERROR_DEVICE,
+          g_strdup(_("Unable to get informations from video device")),
+          g_strdup_printf("Error getting device status: %s",
+                          g_strerror(errno)));
         return FALSE;
       }
 
@@ -171,8 +174,9 @@ gst_v4lmjpegsrc_set_input_norm (GstV4lMjpegSrc       *v4lmjpegsrc,
     /* check */
     if (input == V4L_MJPEG_INPUT_AUTO || norm == VIDEO_MODE_AUTO)
     {
-      gst_element_error(GST_ELEMENT(v4lmjpegsrc),
-        "Unable to auto-detect an input");
+      gst_element_error(GST_ELEMENT(v4lmjpegsrc), GST_ERROR_UNKNOWN,
+	g_strdup(_("An unknown error occured")),
+        g_strdup("Unable to auto-detect an input"));
       return FALSE;
     }
 
@@ -186,9 +190,10 @@ gst_v4lmjpegsrc_set_input_norm (GstV4lMjpegSrc       *v4lmjpegsrc,
 
     if (ioctl(GST_V4LELEMENT(v4lmjpegsrc)->video_fd, MJPIOC_G_STATUS, &bstat) < 0)
     {
-      gst_element_error(GST_ELEMENT(v4lmjpegsrc),
-        "Error getting device status: %s",
-        g_strerror(errno));
+      gst_element_error(GST_ELEMENT(v4lmjpegsrc), GST_ERROR_DEVICE,
+	g_strdup(_("Unable to get informations from video device")),
+        g_strdup_printf("Error getting device status: %s",
+                        g_strerror(errno)));
       return FALSE;
     }
 
@@ -201,9 +206,10 @@ gst_v4lmjpegsrc_set_input_norm (GstV4lMjpegSrc       *v4lmjpegsrc,
     }
     else
     {
-      gst_element_error(GST_ELEMENT(v4lmjpegsrc),
-        "No signal found on input %s",
-        input_name[input]);
+      gst_element_error(GST_ELEMENT(v4lmjpegsrc), GST_ERROR_UNKNOWN,
+	g_strdup(_("An unknown error occured")),
+        g_strdup_printf("No signal found on input %s",
+                        input_name[input]));
       return FALSE;
     }
   }
@@ -259,9 +265,10 @@ gst_v4lmjpegsrc_set_capture (GstV4lMjpegSrc *v4lmjpegsrc,
   /* Query params for capture */
   if (ioctl(GST_V4LELEMENT(v4lmjpegsrc)->video_fd, MJPIOC_G_PARAMS, &bparm) < 0)
   {
-    gst_element_error(GST_ELEMENT(v4lmjpegsrc),
-      "Error getting video parameters: %s",
-      g_strerror(errno));
+    gst_element_error(GST_ELEMENT(v4lmjpegsrc), GST_ERROR_DEVICE,
+      g_strdup(_("Unable to get informations from video device")),
+      g_strdup_printf("Error getting video parameters: %s",
+                      g_strerror(errno)));
     return FALSE;
   }
 
@@ -287,9 +294,10 @@ gst_v4lmjpegsrc_set_capture (GstV4lMjpegSrc *v4lmjpegsrc,
   /* Set params for capture */
   if (ioctl(GST_V4LELEMENT(v4lmjpegsrc)->video_fd, MJPIOC_S_PARAMS, &bparm) < 0)
   {
-    gst_element_error(GST_ELEMENT(v4lmjpegsrc),
-      "Error setting video parameters: %s",
-      g_strerror(errno));
+    gst_element_error(GST_ELEMENT(v4lmjpegsrc), GST_ERROR_DEVICE,
+      g_strdup(_("Unable to set parameters on video device")),
+      g_strdup_printf("Error setting video parameters: %s",
+                      g_strerror(errno)));
     return FALSE;
   }
 
@@ -333,9 +341,10 @@ gboolean gst_v4lmjpegsrc_set_capture_m (GstV4lMjpegSrc *v4lmjpegsrc,
   /* Query params for capture */
   if (ioctl(GST_V4LELEMENT(v4lmjpegsrc)->video_fd, MJPIOC_G_PARAMS, &bparm) < 0)
   {
-    gst_element_error(GST_ELEMENT(v4lmjpegsrc),
-      "Error getting video parameters: %s",
-      g_strerror(errno));
+    gst_element_error(GST_ELEMENT(v4lmjpegsrc), GST_ERROR_DEVICE,
+      g_strdup(_("Unable to get informations from video device")),
+      g_strdup_printf("Error getting video parameters: %s",
+                      g_strerror(errno)));
     return FALSE;
   }
 
@@ -370,23 +379,26 @@ gboolean gst_v4lmjpegsrc_set_capture_m (GstV4lMjpegSrc *v4lmjpegsrc,
 
   if (width + x_offset > maxwidth)
   {
-    gst_element_error(GST_ELEMENT(v4lmjpegsrc),
-      "Image width+offset (%d) bigger than maximum (%d)",
-      width + x_offset, maxwidth);
+    gst_element_error(GST_ELEMENT(v4lmjpegsrc), GST_ERROR_UNKNOWN,
+      g_strdup(_("An unknown error occured")),
+      g_strdup_printf("Image width+offset (%d) bigger than maximum (%d)",
+                      width + x_offset, maxwidth));
     return FALSE;
   }
   if ((width%(bparm.HorDcm*16))!=0) 
   {
-    gst_element_error(GST_ELEMENT(v4lmjpegsrc),
-      "Image width (%d) not multiple of %d (required for JPEG)",
-      width, bparm.HorDcm*16);
+    gst_element_error(GST_ELEMENT(v4lmjpegsrc), GST_ERROR_UNKNOWN,
+      g_strdup(_("An unknown error occured")),
+      g_strdup_printf("Image width (%d) not multiple of %d (required for JPEG)",
+                      width, bparm.HorDcm*16));
     return FALSE;
   }
   if (height + y_offset > (norm==VIDEO_MODE_NTSC ? 480 : 576)) 
   {
-    gst_element_error(GST_ELEMENT(v4lmjpegsrc),
-      "Image height+offset (%d) bigger than maximum (%d)",
-      height + y_offset, (norm==VIDEO_MODE_NTSC ? 480 : 576));
+    gst_element_error(GST_ELEMENT(v4lmjpegsrc), GST_ERROR_UNKNOWN,
+      g_strdup(_("An unknown error occured")),
+      g_strdup_printf("Image height+offset (%d) bigger than maximum (%d)",
+                      height + y_offset, (norm==VIDEO_MODE_NTSC ? 480 : 576)));
     return FALSE;
   }
   /* RJ: Image height must only be a multiple of 8, but geom_height
@@ -394,9 +406,10 @@ gboolean gst_v4lmjpegsrc_set_capture_m (GstV4lMjpegSrc *v4lmjpegsrc,
    */
   if ((height%(bparm.VerDcm*16))!=0) 
   {
-    gst_element_error(GST_ELEMENT(v4lmjpegsrc),
-      "Image height (%d) not multiple of %d (required for JPEG)",
-      height, bparm.VerDcm*16);
+    gst_element_error(GST_ELEMENT(v4lmjpegsrc), GST_ERROR_UNKNOWN,
+      g_strdup(_("An unknown error occured")),
+      g_strdup_printf("Image height (%d) not multiple of %d (required for JPEG)"
+                      ,height, bparm.VerDcm*16));
     return FALSE;
   }
 
@@ -417,9 +430,10 @@ gboolean gst_v4lmjpegsrc_set_capture_m (GstV4lMjpegSrc *v4lmjpegsrc,
   /* Set params for capture */
   if (ioctl(GST_V4LELEMENT(v4lmjpegsrc)->video_fd, MJPIOC_S_PARAMS, &bparm) < 0)
   {
-    gst_element_error(GST_ELEMENT(v4lmjpegsrc),
-      "Error setting video parameters: %s",
-      g_strerror(errno));
+    gst_element_error(GST_ELEMENT(v4lmjpegsrc), GST_ERROR_DEVICE,
+      g_strdup(_("Unable to set parameters on video device")),
+      g_strdup_printf("Error setting video parameters: %s",
+                      g_strerror(errno)));
     return FALSE;
   }
 
@@ -444,17 +458,19 @@ gst_v4lmjpegsrc_capture_init (GstV4lMjpegSrc *v4lmjpegsrc)
   if (ioctl(GST_V4LELEMENT(v4lmjpegsrc)->video_fd,
             MJPIOC_REQBUFS, &(v4lmjpegsrc->breq)) < 0)
   {
-    gst_element_error(GST_ELEMENT(v4lmjpegsrc),
-      "Error requesting video buffers: %s",
-      g_strerror(errno));
+    gst_element_error(GST_ELEMENT(v4lmjpegsrc), GST_ERROR_DEVICE,
+      g_strdup(_("Unable to get informations from video device")),
+      g_strdup_printf("Error requesting video buffers: %s",
+                      g_strerror(errno)));
     return FALSE;
   }
 
   if (v4lmjpegsrc->breq.count < MIN_BUFFERS_QUEUED)
   {
-    gst_element_error(GST_ELEMENT(v4lmjpegsrc),
-      "Too little buffers. We got %d, we want at least %d",
-      v4lmjpegsrc->breq.count, MIN_BUFFERS_QUEUED);
+    gst_element_error(GST_ELEMENT(v4lmjpegsrc), GST_ERROR_UNKNOWN,
+      g_strdup(_("An unknown error occured")),
+      g_strdup_printf("Too little buffers. We got %lu, we want at least %d",
+                      v4lmjpegsrc->breq.count, MIN_BUFFERS_QUEUED));
     return FALSE;
   }
 
@@ -479,9 +495,10 @@ gst_v4lmjpegsrc_capture_init (GstV4lMjpegSrc *v4lmjpegsrc)
     PROT_READ|PROT_WRITE, MAP_SHARED, GST_V4LELEMENT(v4lmjpegsrc)->video_fd, 0);
   if (GST_V4LELEMENT(v4lmjpegsrc)->buffer == MAP_FAILED)
   {
-    gst_element_error(GST_ELEMENT(v4lmjpegsrc),
-      "Error mapping video buffers: %s",
-      g_strerror(errno));
+    gst_element_error(GST_ELEMENT(v4lmjpegsrc), GST_ERROR_UNKNOWN,
+      g_strdup(_("An unknown error occured")),
+      g_strdup_printf("Error mapping video buffers: %s",
+                      g_strerror(errno)));
     GST_V4LELEMENT(v4lmjpegsrc)->buffer = NULL;
     return FALSE;
   }
@@ -622,10 +639,11 @@ gst_v4lmjpegsrc_requeue_frame (GstV4lMjpegSrc *v4lmjpegsrc,
   g_mutex_lock(v4lmjpegsrc->mutex_queue_state);
 
   if (v4lmjpegsrc->frame_queue_state[num] != QUEUE_STATE_SYNCED) {
-    gst_element_error(GST_ELEMENT(v4lmjpegsrc),
-                      "Invalid state %d (expected %d), can't requeue",
+    gst_element_error(GST_ELEMENT(v4lmjpegsrc), GST_ERROR_UNKNOWN,
+      g_strdup(_("An unknown error occured")),
+      g_strdup_printf("Invalid state %d (expected %d), can't requeue",
                       v4lmjpegsrc->frame_queue_state[num],
-                      QUEUE_STATE_SYNCED);
+                      QUEUE_STATE_SYNCED));
     return FALSE;
   }
 
diff --git a/sys/v4l/v4lsrc_calls.c b/sys/v4l/v4lsrc_calls.c
index bc265c39c5..22488c6370 100644
--- a/sys/v4l/v4lsrc_calls.c
+++ b/sys/v4l/v4lsrc_calls.c
@@ -95,9 +95,10 @@ gst_v4lsrc_queue_frame (GstV4lSrc *v4lsrc,
   if (ioctl(GST_V4LELEMENT(v4lsrc)->video_fd,
             VIDIOCMCAPTURE, &(v4lsrc->mmap)) < 0)
   {
-    gst_element_error(GST_ELEMENT(v4lsrc),
-      "Error queueing a buffer (%d): %s",
-      num, g_strerror(errno));
+    gst_element_error(GST_ELEMENT(v4lsrc), GST_ERROR_DEVICE,
+      g_strdup(_("Unable to set parameters on video device")),
+      g_strdup_printf("Error queueing a buffer (%d): %s",
+                      num, g_strerror(errno)));
     return FALSE;
   }
 
@@ -126,9 +127,10 @@ gst_v4lsrc_sync_frame (GstV4lSrc *v4lsrc, gint num)
     /* if the sync() got interrupted, we can retry */
     if (errno != EINTR) {
       v4lsrc->frame_queue_state[num] = QUEUE_STATE_ERROR;
-      gst_element_error(GST_ELEMENT(v4lsrc),
-         "Error syncing on a buffer (%d): %s",
-          num, g_strerror(errno));
+      gst_element_error(GST_ELEMENT(v4lsrc), GST_ERROR_DEVICE,
+	 g_strdup(_("Unable to set parameters on video device")),
+         g_strdup_printf("Error syncing on a buffer (%d): %s",
+                         num, g_strerror(errno)));
       return FALSE;
     }
     DEBUG("Sync got interrupted");
@@ -190,17 +192,19 @@ gst_v4lsrc_capture_init (GstV4lSrc *v4lsrc)
   /* request buffer info */
   if (ioctl(GST_V4LELEMENT(v4lsrc)->video_fd, VIDIOCGMBUF, &(v4lsrc->mbuf)) < 0)
   {
-    gst_element_error(GST_ELEMENT(v4lsrc),
-      "Error getting buffer information: %s",
-      g_strerror(errno));
+    gst_element_error(GST_ELEMENT(v4lsrc), GST_ERROR_DEVICE,
+      g_strdup(_("Unable to get informations from video device")),
+      g_strdup_printf("Error getting buffer information: %s",
+                      g_strerror(errno)));
     return FALSE;
   }
 
   if (v4lsrc->mbuf.frames < MIN_BUFFERS_QUEUED)
   {
-    gst_element_error(GST_ELEMENT(v4lsrc),
-      "Too little buffers. We got %d, we want at least %d",
-      v4lsrc->mbuf.frames, MIN_BUFFERS_QUEUED);
+    gst_element_error(GST_ELEMENT(v4lsrc), GST_ERROR_UNKNOWN,
+      g_strdup(_("An unknown error  occured")),
+      g_strdup_printf("Too little buffers. We got %d, we want at least %d",
+                      v4lsrc->mbuf.frames, MIN_BUFFERS_QUEUED));
     return FALSE;
   }
 
@@ -225,9 +229,10 @@ gst_v4lsrc_capture_init (GstV4lSrc *v4lsrc)
     PROT_READ|PROT_WRITE, MAP_SHARED, GST_V4LELEMENT(v4lsrc)->video_fd, 0);
   if (GST_V4LELEMENT(v4lsrc)->buffer == MAP_FAILED)
   {
-    gst_element_error(GST_ELEMENT(v4lsrc),
-      "Error mapping video buffers: %s",
-      g_strerror(errno));
+    gst_element_error(GST_ELEMENT(v4lsrc), GST_ERROR_UNKNOWN,
+      g_strdup(_("An unknown error occured")),
+      g_strdup_printf("Error mapping video buffers: %s",
+                      g_strerror(errno)));
     GST_V4LELEMENT(v4lsrc)->buffer = NULL;
     return FALSE;
   }
@@ -364,10 +369,11 @@ gst_v4lsrc_requeue_frame (GstV4lSrc *v4lsrc, gint  num)
   g_mutex_lock(v4lsrc->mutex_queue_state);
 
   if (v4lsrc->frame_queue_state[num] != QUEUE_STATE_SYNCED) {
-    gst_element_error(GST_ELEMENT(v4lsrc),
-                      "Invalid state %d (expected %d), can't requeue",
+    gst_element_error(GST_ELEMENT(v4lsrc), GST_ERROR_UNKNOWN,
+      g_strdup(_("An unknown error occured")),
+      g_strdup_printf("Invalid state %d (expected %d), can't requeue",
                       v4lsrc->frame_queue_state[num],
-                      QUEUE_STATE_SYNCED);
+                      QUEUE_STATE_SYNCED));
     return FALSE;
   }
 
@@ -478,9 +484,10 @@ gst_v4lsrc_try_palette (GstV4lSrc *v4lsrc,
   /* let's start by requesting a buffer and mmap()'ing it */
   if (ioctl(GST_V4LELEMENT(v4lsrc)->video_fd, VIDIOCGMBUF, &vmbuf) < 0)
   {
-    gst_element_error(GST_ELEMENT(v4lsrc),
-      "Error getting buffer information: %s",
-      g_strerror(errno));
+    gst_element_error(GST_ELEMENT(v4lsrc), GST_ERROR_DEVICE,
+      g_strdup(_("Unable to get informations from video device")),
+      g_strdup_printf("Error getting buffer information: %s",
+                      g_strerror(errno)));
     return FALSE;
   }
   /* Map the buffers */
@@ -488,9 +495,10 @@ gst_v4lsrc_try_palette (GstV4lSrc *v4lsrc,
                 MAP_SHARED, GST_V4LELEMENT(v4lsrc)->video_fd, 0);
   if (buffer == MAP_FAILED)
   {
-    gst_element_error(GST_ELEMENT(v4lsrc),
-      "Error mapping our try-out buffer: %s",
-      g_strerror(errno));
+    gst_element_error(GST_ELEMENT(v4lsrc), GST_ERROR_UNKNOWN,
+      g_strdup(_("An unknown error occured")),
+      g_strdup_printf("Error mapping our try-out buffer: %s",
+                      g_strerror(errno)));
     return FALSE;
   }
 
@@ -502,18 +510,20 @@ gst_v4lsrc_try_palette (GstV4lSrc *v4lsrc,
   if (ioctl(GST_V4LELEMENT(v4lsrc)->video_fd, VIDIOCMCAPTURE, &vmmap) < 0)
   {
     if (errno != EINVAL) /* our format failed! */
-      gst_element_error(GST_ELEMENT(v4lsrc),
-        "Error queueing our try-out buffer: %s",
-        g_strerror(errno));
+      gst_element_error(GST_ELEMENT(v4lsrc), GST_ERROR_DEVICE,
+        g_strdup(_("Unable to set parameters on video device")),
+        g_strdup_printf("Error queueing our try-out buffer: %s",
+                        g_strerror(errno)));
     munmap(buffer, vmbuf.size);
     return FALSE;
   }
 
   if (ioctl(GST_V4LELEMENT(v4lsrc)->video_fd, VIDIOCSYNC, &frame) < 0)
   {
-    gst_element_error(GST_ELEMENT(v4lsrc),
-      "Error syncing on a buffer (%d): %s",
-      frame, g_strerror(errno));
+    gst_element_error(GST_ELEMENT(v4lsrc), GST_ERROR_UNKNOWN,
+      g_strdup(_("An unknown error occured")),
+      g_strdup_printf("Error syncing on a buffer (%d): %s",
+                      frame, g_strerror(errno)));
     munmap(buffer, vmbuf.size);
     return FALSE;
   }