<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta content="text/html; charset=UTF-8" http-equiv="Content-Type"> </head> <body bgcolor="#ffffff" text="#000000"> On 01/26/2012 10:50 AM, Bruno Gonzalez wrote: <blockquote cite="mid:CAORBtqzi1pX37bKMhaAh8w1Dg_9MVfX12852tCwvuTaBowraCg@mail.gmail.com" type="cite">I expect I cannot get duration, since the RTSP source can sometimes be live video (unknown duration).</blockquote> Yes, that can be the case.<br> <blockquote cite="mid:CAORBtqzi1pX37bKMhaAh8w1Dg_9MVfX12852tCwvuTaBowraCg@mail.gmail.com" type="cite"> <div>However, when I try to get the position, using a Query on my rtspsrc element of the pipeline, I always get "-1" as result. I've tried using a position query with bytes, buffers, time, percentage and everything, but none returns a usable value.</div> </blockquote> Well invetigate the code and figure out why you get a -1. In most cases reporting a position should be possible. Trying the different formats is less useful as e.g. percent is calculated from pos and duration.<br> <blockquote cite="mid:CAORBtqzi1pX37bKMhaAh8w1Dg_9MVfX12852tCwvuTaBowraCg@mail.gmail.com" type="cite"> <div><br> </div> <div>Furthermore, the rtspsrc clock is not usable either, since it's just a counter of time passed on the client side. So when playing at 2x, it doesn't match the server time, nor does it account for jitter.</div> <div><br> </div> <div>What can be influencing the queries to return -1? Am I doing something wrong?</div> </blockquote> Dump a pipeline graph of you pipeline to see which element are used and check their query implementations to see why they don't answer the position query.<br> <br> Stefan<br> <blockquote cite="mid:CAORBtqzi1pX37bKMhaAh8w1Dg_9MVfX12852tCwvuTaBowraCg@mail.gmail.com" type="cite"> <div><br> </div> <div>The code I'm using looks like this (using gstreamer-sharp):</div> <br> Element rtspsrc = m_pipeline.GetByName("rtspsrc");<br> Query query = Query.NewPosition(Gst.Format.Time);<br> rtspsrc.Query(query);<br> long value;<br> Gst.Format format;<br> query.ParsePosition(out format, out value);<br> writeTrace("Query results: " + format + ", " + value); <div> <br> Is that correct?</div> <div><br> <div class="gmail_quote">On Wed, Jan 25, 2012 at 10:07, Stefan Sauer <span dir="ltr"><<a moz-do-not-send="true" href="mailto:ensonic@hora-obscura.de" target="_blank">ensonic@hora-obscura.de</a>></span> wrote:<br> <blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"> <div bgcolor="#ffffff" text="#000000"> <div> On 01/24/2012 05:24 PM, Bruno Gonzalez wrote: <blockquote type="cite"><span>Thanks for the input.</span><br> <br> <span>Unfortunately, I still don't have any hints as to how to get the play </span><span>time in the original source file.</span><br> </blockquote> <br> </div> Use queries to get the duration and current playback position<span><font color="#888888"><br> <br> Stefan.</font></span> <div> <div><br> <blockquote type="cite"> <br> <span>Doing back-of-the-envelope calculations on the client is not an </span><span>option, I need the actual playing time, with a precision of cents of </span><span>second.</span> <div> <font color="#222222" face="arial, sans-serif"><br> </font></div> <div><font color="#222222" face="arial, sans-serif">Any idea?<br> </font><br> <div class="gmail_quote">On Tue, Jan 24, 2012 at 16:08, Stefan Sauer <span dir="ltr"><<a moz-do-not-send="true" href="mailto:ensonic@hora-obscura.de" target="_blank">ensonic@hora-obscura.de</a>></span> wrote:<br> <blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"> <div bgcolor="#ffffff" text="#000000"> <div> On 01/24/2012 03:49 PM, Bruno Gonzalez wrote: <blockquote type="cite"><span>Hi,</span><br> <br> <span>I have a server-client video streaming using gstreamer and RTP. So basically:</span><br> <span>[source storage] --> [server] ---------> [client] --> [frames rendered</span><br> <span>on screen]</span><br> <br> <span>Is there any way to know, for each rendered frame, what was the</span><br> <span>original playing time in the video source of the server?</span><br> <br> <span>For example.</span><br> <span> - At 10 fps, after 30 seconds of playing, the "playing time" would be</span><br> <span>300.0 seconds.</span><br> <span> - But if the network is slow, the playing time could very well be</span><br> <span>only 276.4 seconds.</span><br> <span> - Or maybe some frames could be lost if using UDP.</span><br> <span> - Also, if the source storage has variable framerate, I cannot use</span><br> <span>"10fps" or any other average fps for any calculations.</span><br> </blockquote> <br> </div> video is synchronized to the clock. That is after 30 sec of playing time the video is more or less at 30s. If the network is slow, it is likely that some frames have been skipped.<br> <br> Stefan<br> <br> <blockquote type="cite"> <div> <br> <span>How could this be achieved?</span><br> <br> <span>Thanks!</span><br clear="all"> <div><br> </div> -- <br> Saludos,<br> Bruno González<br> <br> _______________________________________________<br> Jabber: stenyak AT <a moz-do-not-send="true" href="http://gmail.com" target="_blank">gmail.com</a><br> <a moz-do-not-send="true" href="http://www.stenyak.com" target="_blank">http://www.stenyak.com</a><br> </div> <pre><fieldset></fieldset> _______________________________________________ gstreamer-devel mailing list <a moz-do-not-send="true" href="mailto:gstreamer-devel@lists.freedesktop.org" target="_blank">gstreamer-devel@lists.freedesktop.org</a> <a moz-do-not-send="true" href="http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" target="_blank">http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a> </pre> </blockquote> <br> </div> <br> _______________________________________________<br> gstreamer-devel mailing list<br> <a moz-do-not-send="true" href="mailto:gstreamer-devel@lists.freedesktop.org" target="_blank">gstreamer-devel@lists.freedesktop.org</a><br> <a moz-do-not-send="true" href="http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" target="_blank">http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a><br> <br> </blockquote> </div> <br> <br clear="all"> <div><br> </div> -- <br> Saludos,<br> Bruno González<br> <br> _______________________________________________<br> Jabber: stenyak AT <a moz-do-not-send="true" href="http://gmail.com" target="_blank">gmail.com</a><br> <a moz-do-not-send="true" href="http://www.stenyak.com" target="_blank">http://www.stenyak.com</a><br> </div> <pre><fieldset></fieldset> _______________________________________________ gstreamer-devel mailing list <a moz-do-not-send="true" href="mailto:gstreamer-devel@lists.freedesktop.org" target="_blank">gstreamer-devel@lists.freedesktop.org</a> <a moz-do-not-send="true" href="http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" target="_blank">http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a> </pre> </blockquote> <br> </div> </div> </div> <br> _______________________________________________<br> gstreamer-devel mailing list<br> <a moz-do-not-send="true" href="mailto:gstreamer-devel@lists.freedesktop.org" target="_blank">gstreamer-devel@lists.freedesktop.org</a><br> <a moz-do-not-send="true" href="http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" target="_blank">http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a><br> <br> </blockquote> </div> <br> <br clear="all"> <div><br> </div> -- <br> Saludos,<br> Bruno González<br> <br> _______________________________________________<br> Jabber: stenyak AT <a moz-do-not-send="true" href="http://gmail.com" target="_blank">gmail.com</a><br> <a moz-do-not-send="true" href="http://www.stenyak.com" target="_blank">http://www.stenyak.com</a><br> </div> <pre wrap=""> <fieldset class="mimeAttachmentHeader"></fieldset> _______________________________________________ gstreamer-devel mailing list <a class="moz-txt-link-abbreviated" href="mailto:gstreamer-devel@lists.freedesktop.org">gstreamer-devel@lists.freedesktop.org</a> <a class="moz-txt-link-freetext" href="http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel">http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a> </pre> </blockquote> <br> </body> </html>