From 0566ea06e50d09be2c0b0c2fa971ff7eb181353b Mon Sep 17 00:00:00 2001
From: Stefan Sauer <ensonic@users.sf.net>
Date: Thu, 20 Feb 2014 22:52:57 +0100
Subject: [PATCH] autodetect: check if the kid has a sync property

previously autovideosrc did not have a sync property and v4l2src has none either.
---
 gst/autodetect/gstautodetect.c | 7 +++++--
 gst/autodetect/gstautodetect.h | 1 +
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/gst/autodetect/gstautodetect.c b/gst/autodetect/gstautodetect.c
index 9497c0cf37..a3a1c8a6d4 100644
--- a/gst/autodetect/gstautodetect.c
+++ b/gst/autodetect/gstautodetect.c
@@ -349,7 +349,10 @@ gst_auto_detect_detect (GstAutoDetect * self)
   if (!(kid = gst_auto_detect_find_best (self)))
     goto no_sink;
 
-  g_object_set (G_OBJECT (kid), "sync", self->sync, NULL);
+  self->has_sync =
+      g_object_class_find_property (G_OBJECT_GET_CLASS (kid), "sync") != NULL;
+  if (self->has_sync)
+    g_object_set (G_OBJECT (kid), "sync", self->sync, NULL);
   if (klass->configure) {
     klass->configure (self, kid);
   }
@@ -432,7 +435,7 @@ gst_auto_detect_set_property (GObject * object, guint prop_id,
       break;
     case PROP_SYNC:
       self->sync = g_value_get_boolean (value);
-      if (self->kid)
+      if (self->kid && self->has_sync)
         g_object_set_property (G_OBJECT (self->kid), pspec->name, value);
       break;
     default:
diff --git a/gst/autodetect/gstautodetect.h b/gst/autodetect/gstautodetect.h
index 105c28929d..03b06aed7b 100644
--- a/gst/autodetect/gstautodetect.h
+++ b/gst/autodetect/gstautodetect.h
@@ -51,6 +51,7 @@ typedef struct _GstAutoDetect {
 
   /* < private > */ 
   GstElement *kid;
+  gboolean has_sync;
   const gchar *type_klass; /* Source/Sink */
   const gchar *media_klass_lc, *type_klass_lc; /* lower case versions */