hi, im trying to use smpte and xvimagesink using the following pipeline gst-launch videotestsrc ! .sink1 smpte name=s ! ffmpegcolorspace ! xvimagesink videotestsrc pattern=snow ! s.sink2 but it does'nt seem to work: [DUMP] [snaik@snipelinux ~]$ gst-launch videotestsrc ! .sink1 smpte name=s ! ffmpegcolorspace ! xvimagesink videotestsrc pattern=snow ! s.sink2 Setting pipeline to PAUSED ... Pipeline is PREROLLING ... ERROR: from element /pipeline0/xvimagesink0: Failed to create output image buffer of 320x240 pixels Additional debug info: xvimagesink.c(2039): gst_xvimagesink_show_frame (): /pipeline0/xvimagesink0: XServer allocated buffer size did not match input buffer ERROR: pipeline doesn't want to preroll. Setting pipeline to NULL ... FREEING pipeline ... [snaik@snipelinux ~]$ [END-OF-DUMP] but the same pipeline using ximagesink work fine gst-launch videotestsrc ! .sink1 smpte name=s ! ffmpegcolorspace ! ximagesink videotestsrc pattern=snow ! s.sink2 plz help. regards