<html> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> </head> <body> Hi, I'm trying to build a GStreamer-based RTP receiver in a sandboxed architecture: - A "listener" process listens at UDP port and redirect the stream to receiver - "Receiver" process runs in a sandbox without network access, gets data from "listener" over a pipe. The reason for such architecture is increased security - so that vulnerable parsing code is run with minimum privileges. At prototyping phase I'm trying to create a PoC using "gst-launch-1.0", but I cannot find a way to create a working pipeline to play RTP stream from a pipe instead of udpsrc. For example, usual udpsrc receiving pipeline that works: gst-launch-1.0 udpsrc port=3000 caps="application/x-rtp, media=(string)audio, clock-rate=(int)8000, encoding-name=(string)PCMU" ! rtppcmudepay ! mulawdec ! pulsesink Corresponding sending part is gst-launch-1.0 filesrc location="test.wav" ! wavparse ! audioconvert ! audioresample ! mulawenc ! rtppcmupay ! udpsink host=127.0.0.1 port=3000 Changing udpsrc to filesrc doesn't work: gst-launch-1.0 filesrc location="/tmp/pipe" ! "application/x-rtp, media=(string)audio, clock-rate=(int)8000, encoding-name=(string)PCMU" ! rtppcmudepay ! mulawdec ! pulsesink Sending part: gst-launch-1.0 filesrc location="test.wav" ! wavparse ! audioconvert ! audioresample ! mulawenc ! rtppcmupay ! filesink location=/tmp/pipe The stream is actually played, but just garbled sound. Error output: WARNING: from element /GstPipeline:pipeline0/GstRtpPcmuDepay:rtppcmudepay0: Could not decode stream. Additional debug info: gstrtpbasedepayload.c(503): gst_rtp_base_depayload_handle_buffer (): /GstPipeline:pipeline0/GstRtpPcmuDepay:rtppcmudepay0: Received invalid RTP payload, dropping If I capture incoming stream to file, then I'm unable to play it either (same behavior). If I remove RTP elements from the pipeline, raw PCMU is played fine. So my questions are: 1. Is it possible to play RTP stream without udpsrc using gst-launch-1.0? 2. Is it possible to implement this in code, in own application? Thanks, Wire Snark </body> </html>