<div dir="ltr">There's a few potential problems here. Rather than figuring out what they are, I'd suggest you just try playing it with gst-play-1.0 first, rather than manually constructing the pipeline. You can them dump the resulting pipeline to a dot file and view it if you'd like to get an idea of how to manually construct. </div><div class="gmail_extra"> <div class="gmail_quote">On 26 September 2016 at 18:13, Mikl <<a href="mailto:michael.yarochkin@timetronics.be" target="_blank">michael.yarochkin@timetronics.be</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hello, I have MKV, recodred my gstreamer video: appsrc ! 'video/x-raw-rgb,width=800,height=600,framerate=24/1' ! jpegenc ! matroskamux ! filesink 2 subtitles truks: appsrc ! '"text/x-raw' ! matroskamux ! filesink when i am trying to play it gst-launch-1.0 filesrc location=C:\\test\\test.mkv ! matroskademux name=mux mux.video_0! jpegdec ! autovideosink i have this error Setting pipeline to PAUSED ... Pipeline is PREROLLING ... ERROR: from element /GstPipeline:pipeline0/GstMatroskaDemux:mux: Internal data stream error. Additional debug info: matroska-demux.c(4759): gst_matroska_demux_loop (): /GstPipeline:pipeline0/GstMatroskaDemux:mux: streaming stopped, reason not-negotiated (-4) ERROR: pipeline doesn't want to preroll. Setting pipeline to NULL ... Freeing pipeline ... What is wrong? Can you help me please to play it Thank you in advance. -- View this message in context: <a href="http://gstreamer-devel.966125.n4.nabble.com/Can-not-play-MKV-tp4679788.html" rel="noreferrer" target="_blank">http://gstreamer-devel.966125.n4.nabble.com/Can-not-play-MKV-tp4679788.html</a> Sent from the GStreamer-devel mailing list archive at Nabble.com. _______________________________________________ gstreamer-devel mailing list <a href="mailto:gstreamer-devel@lists.freedesktop.org">gstreamer-devel@lists.freedesktop.org</a> <a href="https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" rel="noreferrer" target="_blank">https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a> </blockquote></div> </div>