Yes, but the problem is that I'm using a fakesrc in which I get the mpeg4 packets and so I'm the one that fill the gstbuffer in the handoff function of the fakesrc: I set the timestamp with the basetime subtracted to the currenttime but I don't know how to set the duration. Here's some snippet of the handoff function of the fakesrc: static void cb_handoff (GstElement *fakesrc,         GstBuffer  *buffer,         GstPad     *pad,         gpointer    user_data) {     pad->caps= gst_caps_new_simple ("video/mpeg",         "width", G_TYPE_INT, 720,         "height", G_TYPE_INT, 288,         "framerate",GST_TYPE_FRACTION,25,1,         "mpegversion",G_TYPE_INT,4,         "systemstream",G_TYPE_BOOLEAN,false,NULL);         gst_buffer_set_caps(buffer,pad->caps);         GTimeVal gtime;         g_get_current_time(&gtime);         GstClockTime gstClock=GST_TIMEVAL_TO_TIME(gtime);         buffer->timestamp =gstClock-baseTime; //here I call a function that give me a mpeg4 packet received from the net, the packet is fg_image...                    GST_BUFFER_MALLOCDATA(buffer) =    (unsigned char*) g_memdup (fg_image->pixel_ptr,fg_image->dimension);             GST_BUFFER_DATA(buffer) = GST_BUFFER_MALLOCDATA(buffer);             GST_BUFFER_SIZE(buffer) = fg_image->dim_oggetto_byte;                     itf_Free(pUserData);         pUserData = NULL;         return;     } } Without setting it the duration should be automatically set to GST_CLOCK_TIME_NONE, so how the ffdec_mpeg4 can output that value for the duration? <div>2007/6/13, Edward Hervey <<a href="mailto:bilboed@gmail.com" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">bilboed@gmail.com</a> >:<div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> Hi,   If the stream is properly packetized (the mpeg4 was in a container format), then each mpeg4 packet is an individual GstBuffer. You can get the timestamp and duration of those buffers by using GST_BUFFER_TIMESTAMP(thatbuffer) and GST_BUFFER_DURATION(thatbuffer). The unit used is the nanosecond.    Edward On 6/11/07, Riccardo Corona <<a href="mailto:coronariccardo@gmail.com" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">coronariccardo@gmail.com </a>> wrote: > Hi, > is it possible to get the duration of an mpeg4 packet received from the > ffdec_mpeg4 plugin? > I've noted that, when I launch my gst-app with GST_DEBUG, the ffdec_mpeg4 > plugin write int the output some info like: > > > 0:00:08.734375000 [333m  380 [00m 01622C38 [37mLOG  [00m [00;04m > default :0::<mpeg4-decoder> [00m Received new data of size 14815, > ts:0:02:08.371833333, dur:0:00:00.493833333 > > 0:00: 08.734375000 [333m  380 [00m 01622C38 [37mLOG  [00m [00;04m >  default :0::<mpeg4-decoder> [00m data:01D0BFD0, size:14815, > ts:0:02:08.371833333, dur:0:00:00.493833333 > > 0:00:08.734375000 [333m  380 [00m 01622C38 [36mDEBUG [00m [00;04m >  default :0::<mpeg4-decoder> [00m QOS: qostime 0:02: 08.371833333, earliest > 0:00:06.200000000 > > How could I get this information with gst api?I've searched with > gst-inspector for ffdec_mpeg4 but I did'nt find anything. > > Thank's to all of you. > -- > Riccardo Corona > ------------------------------------------------------------------------- > This SF.net email is sponsored by DB2 Express > Download DB2 Express C - the FREE version of DB2 express and take > control of your XML. No limits. Just data. Click to get it now. > <a href="http://sourceforge.net/powerbar/db2/" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">http://sourceforge.net/powerbar/db2/ </a> > _______________________________________________ > gstreamer-devel mailing list > <a href="mailto:gstreamer-devel@lists.sourceforge.net" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">gstreamer-devel@lists.sourceforge.net</a> > <a href="https://lists.sourceforge.net/lists/listinfo/gstreamer-devel" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)"> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel</a> > > -- Edward Hervey Multimedia editing developer / Fluendo S.A. <a href="http://www.pitivi.org/" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)"> http://www.pitivi.org/</a> </blockquote></div></div> -- Riccardo Corona -- Riccardo Corona