Sorry for my ambiguous question. What I want is some think like the first solution you offer, but I wonder if I can do it at run-time, mean It's 30fps at first, then I decrease it to 15fps for example when the video is still playing. Yes, I wonder If we can do it with videorate and capsfilter at run-time. Thanks <div class="gmail_quote">On Fri, Aug 21, 2009 at 1:49 AM, Michael Smith <<a href="mailto:msmith@xiph.org">msmith@xiph.org</a>> wrote: <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> 2009/8/20 Thành Trung Nguyễn <<a href="mailto:trungnthut@gmail.com">trungnthut@gmail.com</a>>: <div class="im">> Hi all, > > I wonder if we can adjust video fps using capsfilter element at run-time ? > If we can do that, please tell me how. </div>Do you want to adjust the actual number of frames per second (by inserting new frames; either duplicates or using some more complex technique, or dropping frames)? For this, you can use the videorate element (followed by a capsfilter specifying the desired framerate). Or do you want to override the declared framerate on some video (and, presumably, override the actual timestamps to match your new framerate)? For this, I think you might need to write a new element - it'd be very simple though. Or, do you want to just play back the video content at a different framerate? For this, you can send a seek event specifying a rate of other than 1.0 to the pipeline. Just putting a capsfilter by itself in won't help you - capsfilter only filters the existing caps, so it won't work if you're specifying a different framerate from the input. Mike ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. <a href="http://p.sf.net/sfu/bobj-july" target="_blank">http://p.sf.net/sfu/bobj-july</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> -- trungnt