<div dir="ltr">Hello, I've got problem with storing x264 udp stream into a mkv file. My pipeline: gst-launch-1.0 udpsrc caps=application/x-rtp ! rtph264depay ! video/x-h264, alignment=nal ! h264parse ! capsfilter caps="video/x\ -h264, alignment=au, stream-format=avc" ! matroskamux ! fakesink dump=true and I've got an error: ERROR: from element /GstPipeline:pipeline0/GstUDPSrc:udpsrc0: Internal data flow error. Additional debug info: gstbasesrc.c(2812): gst_base_src_loop (): /GstPipeline:pipeline0/GstUDPSrc:udpsrc0: streaming task paused, reason not-negotiated (-4) What's interesting, pipeline shown below works fine: gst-launch-1.0 udpsrc caps=application/x-rtp ! rtph264depay ! video/x-h264, alignment=nal ! h264parse ! video/x-h264, alignment=\ au ! avdec_h264 ! x264enc ! matroskamux ! fakesink dump=true Could somebody help me with this error? I'm sure that my caps before matroskamux are the same in both pipelines. Thanks! Best regards, Marcin Kolny </div>