Greetings, I'm struggling with what should be simple, transcoding a PCMA stream into MP4. My chain runs but produces nothing. The rtsp source is a video encoder where I am discarding the video part of the stream. I plan on muxing back with a different video stream after I get it to save in the mp4. I've also shown how I can listen to the stream just fine. I tried lots of simpler methods with lesser reults, but perhaps I'm off on a tangent now. If someone would straighten me out I'd be very grateful. Thanks. + gst-launch -ev rtspsrc location=rtsp://<a href="http://10.111.1.101/0/trackID=1">10.111.1.101/0/trackID=1</a> name=mic '!' 'application/x-rtp, media=(string)audio, payload=(int)8, clock-rate=(int)8000, encoding-name=(string)PCMA, a-ptime=(string)20, npt-start=(guint64)0, play-speed=(double)1, play-scale=(double)1' '!' rtppcmadepay '!' audioparse '!' audioresample '!' ffenc_aac '!' queue2 name=qa '!' mp4mux name=mux faststart=true moov-recovery-file=test.moov '!' filesink location=test.mp4 Setting pipeline to PAUSED ... /GstPipeline:pipeline0/GstRTSPSrc:mic/GstRtpBin:rtpbin0: latency = 2000 /GstPipeline:pipeline0/GstRTSPSrc:mic/GstRtpBin:rtpbin0: buffer-mode = slave (1) /GstPipeline:pipeline0/GstRTSPSrc:mic/GstUDPSrc:udpsrc1: timeout = 5000000 /GstPipeline:pipeline0/GstRTSPSrc:mic/GstUDPSrc:udpsrc4: timeout = 5000000 Pipeline is live and does not need PREROLL ... Setting pipeline to PLAYING ... New clock: GstSystemClock /GstPipeline:pipeline0/GstRTSPSrc:mic/GstUDPSrc:udpsrc1: timeout = 0 /GstPipeline:pipeline0/GstRTSPSrc:mic/GstUDPSrc:udpsrc4: timeout = 0 /GstPipeline:pipeline0/GstRTSPSrc:mic/GstRtpBin:rtpbin0.GstGhostPad:send_rtcp_src_0: caps = application/x-rtcp /GstPipeline:pipeline0/GstRTSPSrc:mic/GstRtpBin:rtpbin0/GstRtpSession:rtpsession0.GstPad:send_rtcp_src: caps = application/x-rtcp /GstPipeline:pipeline0/GstRTSPSrc:mic/GstUDPSink:udpsink1.GstPad:sink: caps = application/x-rtcp /GstPipeline:pipeline0/GstRTSPSrc:mic/GstRtpBin:rtpbin0.GstGhostPad:send_rtcp_src_0.GstProxyPad:proxypad2: caps = application/x-rtcp /GstPipeline:pipeline0/GstRTSPSrc:mic/GstRtpBin:rtpbin0.GstGhostPad:send_rtcp_src_1: caps = application/x-rtcp /GstPipeline:pipeline0/GstRTSPSrc:mic/GstRtpBin:rtpbin0/GstRtpSession:rtpsession1.GstPad:send_rtcp_src: caps = application/x-rtcp /GstPipeline:pipeline0/GstRTSPSrc:mic/GstUDPSink:udpsink3.GstPad:sink: caps = application/x-rtcp /GstPipeline:pipeline0/GstRTSPSrc:mic/GstRtpBin:rtpbin0.GstGhostPad:send_rtcp_src_1.GstProxyPad:proxypad5: caps = application/x-rtcp /GstPipeline:pipeline0/GstCapsFilter:capsfilter1: caps = application/x-rtp, media=(string)audio, payload=(int)8, clock-rate=(int)8000, encoding-name=(string)PCMA, a-ptime=(string)20, npt-start=(guint64)0, play-speed=(double)1, play-scale=(double)1 /GstPipeline:pipeline0/GstCapsFilter:capsfilter1.GstPad:src: caps = application/x-rtp, media=(string)audio, payload=(int)8, clock-rate=(int)8000, encoding-name=(string)PCMA, a-ptime=(string)20, npt-start=(guint64)0, play-speed=(double)1, play-scale=(double)1 /GstPipeline:pipeline0/GstCapsFilter:capsfilter1.GstPad:sink: caps = application/x-rtp, media=(string)audio, payload=(int)8, clock-rate=(int)8000, encoding-name=(string)PCMA, a-ptime=(string)20, npt-start=(guint64)0, play-speed=(double)1, play-scale=(double)1 /GstPipeline:pipeline0/GstRTSPSrc:mic.GstGhostPad:recv_rtp_src_1_89829216_8: caps = application/x-rtp, media=(string)audio, payload=(int)8, clock-rate=(int)8000, encoding-name=(string)PCMA, a-ptime=(string)20, npt-start=(guint64)0, play-speed=(double)1, play-scale=(double)1 /GstPipeline:pipeline0/GstRTSPSrc:mic.GstGhostPad:recv_rtp_src_1_89829216_8.GstProxyPad:proxypad7: caps = application/x-rtp, media=(string)audio, payload=(int)8, clock-rate=(int)8000, encoding-name=(string)PCMA, a-ptime=(string)20, npt-start=(guint64)0, play-speed=(double)1, play-scale=(double)1 /GstPipeline:pipeline0/GstRTSPSrc:mic/GstRtpBin:rtpbin0.GstGhostPad:recv_rtp_src_1_89829216_8.GstProxyPad:proxypad6: caps = application/x-rtp, media=(string)audio, payload=(int)8, clock-rate=(int)8000, encoding-name=(string)PCMA, a-ptime=(string)20, npt-start=(guint64)0, play-speed=(double)1, play-scale=(double)1 /GstPipeline:pipeline0/GstRtpPcmaDepay:rtppcmadepay0.GstPad:src: caps = audio/x-alaw, channels=(int)1, rate=(int)8000 /GstPipeline:pipeline0/GstRtpPcmaDepay:rtppcmadepay0.GstPad:sink: caps = application/x-rtp, media=(string)audio, payload=(int)8, clock-rate=(int)8000, encoding-name=(string)PCMA, a-ptime=(string)20, npt-start=(guint64)0, play-speed=(double)1, play-scale=(double)1 /GstPipeline:pipeline0/GstAudioParse:audioparse0.GstPad:sink: caps = audio/x-alaw, channels=(int)1, rate=(int)8000 /GstPipeline:pipeline0/GstAudioParse:audioparse0.GstPad:src: caps = audio/x-raw-int, rate=(int)44100, channels=(int)2, width=(int)16, depth=(int)16, signed=(boolean)true, endianness=(int)1234 /GstPipeline:pipeline0/GstAudioResample:audioresample0.GstPad:src: caps = audio/x-raw-int, rate=(int)44100, channels=(int)2, width=(int)16, depth=(int)16, signed=(boolean)true, endianness=(int)1234 /GstPipeline:pipeline0/GstAudioResample:audioresample0.GstPad:sink: caps = audio/x-raw-int, rate=(int)44100, channels=(int)2, width=(int)16, depth=(int)16, signed=(boolean)true, endianness=(int)1234 /GstPipeline:pipeline0/ffenc_aac:ffenc_aac0.GstPad:src: caps = audio/mpeg, channels=(int)2, rate=(int)44100, mpegversion=(int)4, stream-format=(string)raw, codec_data=(buffer)1210 /GstPipeline:pipeline0/ffenc_aac:ffenc_aac0.GstPad:sink: caps = audio/x-raw-int, rate=(int)44100, channels=(int)2, width=(int)16, depth=(int)16, signed=(boolean)true, endianness=(int)1234 /GstPipeline:pipeline0/GstRTSPSrc:mic.GstGhostPad:recv_rtp_src_0_89829088_96: caps = application/x-rtp, media=(string)video, payload=(int)96, clock-rate=(int)90000, encoding-name=(string)H264, packetization-mode=(string)1, sprop-parameter-sets=(string)\"Z0LgFNoFh8Q\\=\\,aM4wpIA\\=\", npt-start=(guint64)0, play-speed=(double)1, play-scale=(double)1 /GstPipeline:pipeline0/GstRTSPSrc:mic.GstGhostPad:recv_rtp_src_0_89829088_96.GstProxyPad:proxypad9: caps = application/x-rtp, media=(string)video, payload=(int)96, clock-rate=(int)90000, encoding-name=(string)H264, packetization-mode=(string)1, sprop-parameter-sets=(string)\"Z0LgFNoFh8Q\\=\\,aM4wpIA\\=\", npt-start=(guint64)0, play-speed=(double)1, play-scale=(double)1 /GstPipeline:pipeline0/GstRTSPSrc:mic/GstRtpBin:rtpbin0.GstGhostPad:recv_rtp_src_0_89829088_96.GstProxyPad:proxypad8: caps = application/x-rtp, media=(string)video, payload=(int)96, clock-rate=(int)90000, encoding-name=(string)H264, packetization-mode=(string)1, sprop-parameter-sets=(string)\"Z0LgFNoFh8Q\\=\\,aM4wpIA\\=\", npt-start=(guint64)0, play-speed=(double)1, play-scale=(double)1 ^A When I listen to the source it works fine: Here's the Log + gst-launch -ev rtspsrc location=rtsp://<a href="http://10.111.1.101/0/trackID=1">10.111.1.101/0/trackID=1</a> '!' rtppcmadepay '!' autoaudiosink Setting pipeline to PAUSED ... /GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0/GstRtpBin:rtpbin0: latency = 2000 /GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0/GstRtpBin:rtpbin0: buffer-mode = slave (1) /GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0/GstUDPSrc:udpsrc0: timeout = 5000000 /GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0/GstUDPSrc:udpsrc3: timeout = 5000000 Pipeline is live and does not need PREROLL ... Setting pipeline to PLAYING ... New clock: GstSystemClock /GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0/GstUDPSrc:udpsrc0: timeout = 0 /GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0/GstUDPSrc:udpsrc3: timeout = 0 /GstPipeline:pipeline0/GstRtpPcmaDepay:rtppcmadepay0.GstPad:src: caps = audio/x-alaw, channels=(int)1, rate=(int)8000 /GstPipeline:pipeline0/GstRtpPcmaDepay:rtppcmadepay0.GstPad:sink: caps = application/x-rtp, media=(string)audio, payload=(int)8, clock-rate=(int)8000, encoding-name=(string)PCMA, a-ptime=(string)20, npt-start=(guint64)0, play-speed=(double)1, play-scale=(double)1 /GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0.GstGhostPad:recv_rtp_src_1_89829216_8: caps = application/x-rtp, media=(string)audio, payload=(int)8, clock-rate=(int)8000, encoding-name=(string)PCMA, a-ptime=(string)20, npt-start=(guint64)0, play-speed=(double)1, play-scale=(double)1 /GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0.GstGhostPad:recv_rtp_src_1_89829216_8.GstProxyPad:proxypad8: caps = application/x-rtp, media=(string)audio, payload=(int)8, clock-rate=(int)8000, encoding-name=(string)PCMA, a-ptime=(string)20, npt-start=(guint64)0, play-speed=(double)1, play-scale=(double)1 /GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0/GstRtpBin:rtpbin0.GstGhostPad:recv_rtp_src_1_89829216_8.GstProxyPad:proxypad7: caps = application/x-rtp, media=(string)audio, payload=(int)8, clock-rate=(int)8000, encoding-name=(string)PCMA, a-ptime=(string)20, npt-start=(guint64)0, play-speed=(double)1, play-scale=(double)1 /GstPipeline:pipeline0/GstAutoAudioSink:autoaudiosink0/GstPulseSink:autoaudiosink0-actual-sink-pulse.GstPad:sink: caps = audio/x-alaw, channels=(int)1, rate=(int)8000 /GstPipeline:pipeline0/GstAutoAudioSink:autoaudiosink0.GstGhostPad:sink: caps = audio/x-alaw, channels=(int)1, rate=(int)8000 /GstPipeline:pipeline0/GstAutoAudioSink:autoaudiosink0.GstGhostPad:sink.GstProxyPad:proxypad0: caps = audio/x-alaw, channels=(int)1, rate=(int)8000 /GstPipeline:pipeline0/GstAutoAudioSink:autoaudiosink0/GstPulseSink:autoaudiosink0-actual-sink-pulse: volume = 1.000000 /GstPipeline:pipeline0/GstAutoAudioSink:autoaudiosink0/GstPulseSink:autoaudiosink0-actual-sink-pulse: mute = FALSE /GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0/GstRtpBin:rtpbin0.GstGhostPad:send_rtcp_src_0: caps = application/x-rtcp /GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0/GstRtpBin:rtpbin0/GstRtpSession:rtpsession0.GstPad:send_rtcp_src: caps = application/x-rtcp /GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0/GstUDPSink:udpsink1.GstPad:sink: caps = application/x-rtcp /GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0/GstRtpBin:rtpbin0.GstGhostPad:send_rtcp_src_0.GstProxyPad:proxypad3: caps = application/x-rtcp /GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0.GstGhostPad:recv_rtp_src_0_89829088_96: caps = application/x-rtp, media=(string)video, payload=(int)96, clock-rate=(int)90000, encoding-name=(string)H264, packetization-mode=(string)1, sprop-parameter-sets=(string)\"Z0LgFNoFh8Q\\=\\,aM4wpIA\\=\", npt-start=(guint64)0, play-speed=(double)1, play-scale=(double)1 /GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0.GstGhostPad:recv_rtp_src_0_89829088_96.GstProxyPad:proxypad10: caps = application/x-rtp, media=(string)video, payload=(int)96, clock-rate=(int)90000, encoding-name=(string)H264, packetization-mode=(string)1, sprop-parameter-sets=(string)\"Z0LgFNoFh8Q\\=\\,aM4wpIA\\=\", npt-start=(guint64)0, play-speed=(double)1, play-scale=(double)1 /GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0/GstRtpBin:rtpbin0.GstGhostPad:recv_rtp_src_0_89829088_96.GstProxyPad:proxypad9: caps = application/x-rtp, media=(string)video, payload=(int)96, clock-rate=(int)90000, encoding-name=(string)H264, packetization-mode=(string)1, sprop-parameter-sets=(string)\"Z0LgFNoFh8Q\\=\\,aM4wpIA\\=\", npt-start=(guint64)0, play-speed=(double)1, play-scale=(double)1 /GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0/GstRtpBin:rtpbin0.GstGhostPad:send_rtcp_src_1: caps = application/x-rtcp /GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0/GstRtpBin:rtpbin0/GstRtpSession:rtpsession1.GstPad:send_rtcp_src: caps = application/x-rtcp /GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0/GstUDPSink:udpsink3.GstPad:sink: caps = application/x-rtcp /GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0/GstRtpBin:rtpbin0.GstGhostPad:send_rtcp_src_1.GstProxyPad:proxypad6: caps = application/x-rtcp ^CCaught interrupt -- handling interrupt. Interrupt: Stopping pipeline ... EOS on shutdown enabled -- Forcing EOS on the pipeline Waiting for EOS... Got EOS from element "pipeline0". EOS received - stopping pipeline... Execution ended after 9881401256 ns. Setting pipeline to PAUSED ... Setting pipeline to READY ... /GstPipeline:pipeline0/GstAutoAudioSink:autoaudiosink0/GstPulseSink:autoaudiosink0-actual-sink-pulse.GstPad:sink: caps = NULL /GstPipeline:pipeline0/GstAutoAudioSink:autoaudiosink0.GstGhostPad:sink: caps = NULL /GstPipeline:pipeline0/GstRtpPcmaDepay:rtppcmadepay0.GstPad:src: caps = NULL /GstPipeline:pipeline0/GstRtpPcmaDepay:rtppcmadepay0.GstPad:sink: caps = NULL /GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0.GstGhostPad:recv_rtp_src_0_89829088_96: caps = NULL /GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0.GstGhostPad:recv_rtp_src_1_89829216_8: caps = NULL /GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0/GstRtpBin:rtpbin0.GstGhostPad:recv_rtp_src_0_89829088_96: caps = NULL /GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0/GstRtpBin:rtpbin0.GstGhostPad:recv_rtp_src_1_89829216_8: caps = NULL /GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0/GstRtpBin:rtpbin0.GstGhostPad:send_rtcp_src_1: caps = NULL /GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0/GstRtpBin:rtpbin0.GstGhostPad:send_rtcp_src_0: caps = NULL /GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0/GstRtpBin:rtpbin0/GstRtpPtDemux:rtpptdemux1.GstPad:src_96: caps = NULL /GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0/GstRtpBin:rtpbin0/GstRtpPtDemux:rtpptdemux0.GstPad:src_8: caps = NULL /GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0/GstRtpBin:rtpbin0/GstRtpSession:rtpsession1.GstPad:send_rtcp_src: caps = NULL /GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0/GstRtpBin:rtpbin0/GstRtpSession:rtpsession0.GstPad:send_rtcp_src: caps = NULL /GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0/GstUDPSink:udpsink1.GstPad:sink: caps = NULL /GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0/GstUDPSink:udpsink3.GstPad:sink: caps = NULL Setting pipeline to NULL ... Freeing pipeline ...