Timestamping error/or comptuer too slow with gstreamer/gstbasesink in Qt

[Dionis]

Hi!
I am building a simple video player in Qt using gstreamer-1.0. When I run it
from Qt, or .exe in my pc, everything runs and works ok. But when I try it
from another pc, it plays for some seconds that it skips some
seconds/minutes and so on. I guess the problem is with sync, I have tried
setting d3dvidesink property: sync=false, but is the same. I have read many
similiar threads but none seems to help.

*A lot of buffers are being dropped. Additional debug info:
gstbasesink.c(2846): gst_base_sink_is_too_late (): There may be a
timestamping problem, or this computer is too slow.*

I have tried setting different properties, but none helped. I have seen the
following threads, but still the same problem:

Thread 1
<http://stackoverflow.com/questions/11397655/streaming-rtp-rtsp-sync-timestamp-problems>    
Thread 2
<http://gstreamer-devel.966125.n4.nabble.com/There-may-be-a-timestamping-problem-or-this-computer-is-too-slow-td3807357.html>   
Thread 3
<http://gstreamer-devel.966125.n4.nabble.com/Video-stream-timestamps-problem-td4657379.html>  

On Thread 3 there is a suggestion setting "do-timestamp" property on appsrc
to TRUE, but I use uridecodebin as source that has not a "do-timestamp"
property.

My pipeline is as follows:

*uridecodebin ! audioconvert ! volume ! autoaudiosink ! videoconvert ! gamma
! d3dvideosink*

Thanks in Advance!

Here is some code, if you need more please comment.

 // Create the elements
   data.source        = gst_element_factory_make ( "uridecodebin",  "source"
);
   data.audio_convert = gst_element_factory_make ( "audioconvert", 
"audio_convert" );
   data.volume        = gst_element_factory_make ( "volume",       
"volume");
   data.audio_sink    = gst_element_factory_make ( "autoaudiosink",
"audio_sink" );
   data.video_convert = gst_element_factory_make ( "videoconvert", 
"video_convert" ); 
   data.filter        = gst_element_factory_make ( "gamma",        
"filter"); 
   data.video_sink    = gst_element_factory_make ( "d3dvideosink", 
"video_sink" );


   // Create the empty pipeline
   data.pipeline = gst_pipeline_new ("test-pipeline");
   if (!data.pipeline || !data.source || !data.audio_convert || !data.volume
|| !data.audio_sink
                      || !data.video_convert || !data.filter  ||
!data.video_sink ) {
   g_printerr ("Not all elements could be created.\n");}
   return ;
   }

   // Build the pipeline. Note that we are NOT linking the source at this
point. We will do it later.
   gst_bin_add_many (GST_BIN (data.pipeline), data.source,
data.audio_convert , data.volume, data.audio_sink,
                                                   data.video_convert,
data.filter, data.video_sink, NULL);


if (!gst_element_link (data.audio_convert, data.volume)) {
g_printerr ("Elements AUDIO_CONVERT - VOLUME could not be linked.\n");
gst_object_unref (data.pipeline);
return ;
}

if (!gst_element_link (data.volume, data.audio_sink)) {
g_printerr ("Elements VOLUME - AUDIO_SINK could not be linked.\n");
gst_object_unref (data.pipeline);
return ;
}

if (!gst_element_link(data.video_convert, data.filter)) {
g_printerr("Elements VIDEO_CONVERT - FILTER could not be linked.\n");
gst_object_unref(data.pipeline);
return ;
}

if (!gst_element_link(data.filter, data.video_sink)) {
g_printerr("Elements FILTER - VIDEO_SINK could not be linked.\n");
gst_object_unref(data.pipeline);
return ;
}


// When I open Video: 


// Set the URI to play
    QString filePath = "file:///"+filename;
    QByteArray ba = filePath.toLatin1();
    const char *c_filePath = ba.data();

ret = gst_element_set_state (data.pipeline, GST_STATE_NULL);

gint64 max_lateness = 2000000; //2 milli sec
g_object_set (data.source, "uri", c_filePath, NULL);

// I have tried setting the following properties, but none helped
// g_object_set (data.source, "do-timestamp", true, NULL);
// g_object_set( data.video_sink, "sync", false, NULL);
// g_object_set( data.video_sink, "max-lateness", max_lateness, NULL);
qDebug() << &c_filePath;

// Link video_sink with playingWidget->winId()
gst_video_overlay_set_window_handle (GST_VIDEO_OVERLAY (data.video_sink),
xwinid);


// Connect to the pad-added signal
   g_signal_connect (data.source, "pad-added", G_CALLBACK
(pad_added_handler), &data) ;

// Start playing
ret = gst_element_set_state (data.pipeline, GST_STATE_PLAYING);
if (ret == GST_STATE_CHANGE_FAILURE) {
       gst_element_set_state (data.pipeline, GST_STATE_NULL);
       gst_object_unref (data.pipeline);
         // Exit application
         QTimer::singleShot(0, QApplication::activeWindow(), SLOT(quit()));}

data.playing = TRUE;
data.rate    = 1.0;

// Iterate - gets the position and length every 200 msec
g_print ("Running...\n");
emit setMsg( "Running...\n" );
currFileName = filename;
timer->start(500);



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