Hi, gstreamer-devel:     gst_util_uint64_scale_int has 3 parameters: val, num, denom and this function perform val*num/denom and return the result. The last parameter denom can't be negative, that's why you got these warning messages.     So your mission is to find out where these messages come from. After that, you can tell why these messages occur. I also got these warnings several times and finally I find out the denom which I passed to gst_util_uint64_scale_int will be -1 when the playing is reaching EOS. So I add a "if" logic in the code and solved this problem. Eric Zhang <div class="gmail_quote">2008/12/10 Noe Nieto <<a href="mailto:tzicatl@gmail.com">tzicatl@gmail.com</a>> <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> I am working with this pipeline: gnomevfssrc name="camsrc" do-timestamp=true location="%s" ! multipartdemux ! jpegdec ! \ timeoverlay valign="bottom" text="Frame Time" shaded-background=true ! \ clockoverlay text="clock time:" shaded-background=true ! ffmpegcolorspace ! \ ximagesink force-aspect-ratio="true" When I run it there is a lot of messages printed in the console and they look like this: GStreamer-CRITICAL **: gst_util_uint64_scale_int: assertion `denom > 0' failed This happens when I run the pipeline either with gst-launch or a specifically designed python app. The question is: Why do I keep getting this messages on the console? I hope someone can give some advice. Noe. ------------------------------------------------------------------------------ SF.Net email is Sponsored by MIX09, March 18-20, 2009 in Las Vegas, Nevada. The future of the web can't happen without you.  Join us at MIX09 to help pave the way to the Next Web now. Learn more and register at <a href="http://ad.doubleclick.net/clk;208669438;13503038;i?http://2009.visitmix.com/" target="_blank">http://ad.doubleclick.net/clk;208669438;13503038;i?http://2009.visitmix.com/</a> _______________________________________________ gstreamer-devel mailing list <a href="mailto:gstreamer-devel@lists.sourceforge.net">gstreamer-devel@lists.sourceforge.net</a> <a href="https://lists.sourceforge.net/lists/listinfo/gstreamer-devel" target="_blank">https://lists.sourceforge.net/lists/listinfo/gstreamer-devel</a> </blockquote></div>