replace xvimagesink by ximagesink. ffmpegcolorspace is there not really needed because videotestsrc can output rgb. You forgot to add myplugin into the bin. (libass) Julien <div>2008/4/11, AlannY <<a href="mailto:alanny@starlink.ru">alanny@starlink.ru</a>>:<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> Thijs Vermeir wrote:   > Hi, >   > You can use ffmpegcolorspace like this:   > gst-launch -v videotestsrc ! ffmpegcolorspace ! video/x-raw-rgb ! fakesink   >   > But you don't need ffmpegcolorspace because the videotestsrc can   > also output video in rgb. (Try gst-inspect videotestsrc)   >   > To force videotestsrc to use rgb use something like this:   > gst-launch -v videotestsrc ! video/x-raw-rgb ! fakesink   >   > Gr,   > Thijs   > And how to do it programmaly? I'm trying, but everything I get video/x-raw-yuv ;-( (example) source = gst_element_factory_make("videotestsrc", "source"); colorspace = gst_element_factory_make("ffmpegcolorspace", "colorspace"); myplugin = gst_element_factory_make("myplugin", "myplugin"); video_sink = gst_element_factory_make("xvimagesink", "video_sink"); gst_bin_add_many(GST_BIN(pipeline), source, colorspace, libass, video_sink, NULL); caps = gst_caps_new_simple("video/x-raw-rgb", NULL); gst_element_link_filtered(source, colorspace, caps); gst_caps_unref(caps); gst_element_link(colorspace, myplugin); gst_element_link(mypluin, video_sink); Nothing works. Myplugin still receives video/x-raw-yuv ------------------------------------------------------------------------- This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. <a href="http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone">http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone</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">https://lists.sourceforge.net/lists/listinfo/gstreamer-devel</a> </blockquote></div>