Hi Andrey, I followed your example and it works for me. I added gst_element_set_state(pipe,GST_STATE_NULL); before changing framerate, and also added gst_element_set_state(pipe,GST_STATE_PLAYING); after changing framerate. This changed the framerate. But another problem came by: The video window closed and re-opened at the moment of framerate changing. I want to make the window stay there and ONLY the videoframe change. Is there some way to make the video window never close while changing framerate? Thanks! Tom <div class="gmail_quote">On Sun, Jul 10, 2011 at 4:21 AM, Andrey Nechypurenko <<a href="mailto:andreynech@googlemail.com">andreynech@googlemail.com</a>> wrote: <blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">Hi Tom, <div class="im"> > existed...<a href="http://gitorious.org/veter/veter/blobs/master/src/vehicle/VideoSenderThread.cpp#line264" target="_blank">http://gitorious.org/veter/veter/blobs/master/src/vehicle/VideoSenderThread.cpp#line264</a> > Could you please give me another example about adjusting the caps filter? </div>Last couple of months I was working on the project rather active and re-organize the source tree quite a bit. Please try the following link: <a href="https://www.gitorious.org/veter/vehicle/blobs/master/src/VideoSenderThread.cpp#line253" target="_blank">https://www.gitorious.org/veter/vehicle/blobs/master/src/VideoSenderThread.cpp#line253</a> Regards, Andrey. ---------------------------------------- Blog: <a href="http://veter-project.blogspot.com" target="_blank">http://veter-project.blogspot.com</a> <div><div></div><div class="h5"> > Thank you very much! > > Tom > > On Thu, Mar 10, 2011 at 2:58 AM, Andrey Nechypurenko > <<a href="mailto:andreynech@googlemail.com">andreynech@googlemail.com</a>> wrote: >> >> Hi Tom, >> >> > I use >> > gst-launch filesrc "location=video/1.MPG" ! decodebin ! videorate ! >> > video/x-raw-yuv, width=640,height=480,framerate=25/1 ! ffmpegcolorspace >> > ! >> > jpegenc ! multipartmux ! tcpserversink host=192.168.2.1 port=$portNumber >> > to stream a video and can change the video frame rate in this way. >> > But in this way the frame rate is fixed (i.e., framerate=25/1 here). >> > >> > I want to change the framerate in REALTIME when video is PLAYING --- >> > during the streaming of this video, I can change the framerate anytime I >> > want. >> >> Then you need to modify the pipeline from your application. In >> particular, you need to adjust the caps filter. Here you can find an >> example how to do it: >> >> <a href="http://gitorious.org/veter/veter/blobs/master/src/vehicle/VideoSenderThread.cpp#line264" target="_blank">http://gitorious.org/veter/veter/blobs/master/src/vehicle/VideoSenderThread.cpp#line264</a> >> It changes width and height property of the named (qos-caps) caps >> filter by pausing the videoscale element in front of it, updating >> width and height properties and then un-pausing the videoscale. So in >> your case you can update the framerate property. However, as Kapil >> pointed out to work properly, the downstream elements should be able >> to re-negotiate the new format. >> >> HTH, >> Andrey. >> _______________________________________________ >> gstreamer-devel mailing list >> <a href="mailto:gstreamer-devel@lists.freedesktop.org">gstreamer-devel@lists.freedesktop.org</a> >> <a href="http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" target="_blank">http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a> > > > _______________________________________________ > gstreamer-devel mailing list > <a href="mailto:gstreamer-devel@lists.freedesktop.org">gstreamer-devel@lists.freedesktop.org</a> > <a href="http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" target="_blank">http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a> > > _______________________________________________ gstreamer-devel mailing list <a href="mailto:gstreamer-devel@lists.freedesktop.org">gstreamer-devel@lists.freedesktop.org</a> <a href="http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" target="_blank">http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a> </div></div></blockquote></div>