Segmentation fault when change pipeline state.

[rasnaut]

Hello to everyone!
I have problem when I stop my pipline. I have class video pipline:
TVideo::TVideo(int iNumberDevice)
{ 
       gst_init (NULL,NULL);
       geVideoSrc = gst_element_factory_make("v4l2src", "source");
       g_assert(geVideoSrc);
       QString strTmp = "/dev/video" + QString::number(NumDev);
       const gchar* tmp = strTmp.toLatin1();
       g_object_set (G_OBJECT (geVideoSrc), "device", tmp, NULL);
}
TVideo::~TVideo()
{ 
    gst_object_unref (GST_OBJECT (gePipline));
}
int TVideo::Init()
{
    gePipline = gst_pipeline_new("pipeline");
    g_assert(gePipline);
    geVideoRate = gst_element_factory_make("videorate", "vrate1");
    g_assert(geVideoRate);
    geVideoScale = gst_element_factory_make("videoscale", "vscale1");
    g_assert(geVideoScale);
    geVideoOut1 = gst_element_factory_make("fakesink", "video out1");
    g_assert(geVideoOut1);

    gst_bin_add_many(GST_BIN(gePipline), geVideoSrc,
geVideoRate,geVideoScale,geVideoOut1, NULL);
    ........
    gst_element_set_state(GST_ELEMENT(gePipline), GST_STATE_READY);
    gst_element_set_state(GST_ELEMENT(gePipline), GST_STATE_PAUSED);
    return 1;
}
int TVideo::StartCapture()
{
   gst_element_set_state(GST_ELEMENT(gePipline), GST_STATE_PLAYING);
   g_print ("Running video... \n");
   return 1;
}
int TVideo::StopCapture()
{
    gst_element_set_state(gePipline, GST_STATE_PAUSED);
    gst_element_set_state(gePipline, GST_STATE_READY);
    gst_element_set_state(gePipline, GST_STATE_NULL);
    return 1;
}
So, when I start create 24 objects and call Init() and StartCapture(), all
working. But when I stop process and call StopCapture() appear Segmentation
fault error. It appeared when I am changing state
(GST_STATE_PAUSED->GST_STATE_READY) of some object (Maybe 1, maybe 17, maybe
23) . If I remove it operation error appear again
(GST_STATE_PAUSED->GST_STATE_NULL). 
So what I do wrong?



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