<html xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns="http://www.w3.org/TR/REC-html40"> <head> <meta http-equiv=Content-Type content="text/html; charset=us-ascii"> <meta name=Generator content="Microsoft Word 11 (filtered medium)"> <style>  </style> </head> <body lang=EN-US link=blue vlink=purple> <div class=Section1> Hi,<o:p></o:p> <o:p> </o:p> I am trying to create a pipeline to stream AAC using rtp, then using Darwin Streaming Server to relay it to a client’s quicktime player. I am able to do this successfully with video (by itself) with the following pipeline<o:p></o:p> <o:p> </o:p>    gst-launch -v v4l2src always-copy=false do-timestamp=true \          <o:p></o:p>                 num-buffers=$(( 30 * 60 * 5 )) ! \                      <o:p></o:p>         video/x-raw-yuv, format=$fourcc$UYVY, \                       <o:p></o:p>                 width=720, height=480, framerate=$fraction$30/1 ! \   <o:p></o:p>         TIVidenc1 codecName=h264enc engineName=codecServer \            <o:p></o:p>                 rateControlPreset=2 bitRate=512000 iColorSpace=UYVY \   <o:p></o:p>                 resolution=720x480 frameRate=30 ! \                     <o:p></o:p>         rtph264pay scan-mode=bytestream ! \                             <o:p></o:p>         udpsink host=225.1.1.2 auto-multicast=true port=9010<o:p></o:p> <o:p> </o:p> Audio however seems to be a different beast. I’ve found even when piping AAC to a filesink, in order for quicktime to play the audio, I have to use qtmux or mp4mux after the encoding phase.  When I attempt to mimic my video pipeline for audio like the following:<o:p></o:p> <o:p> </o:p> gst-launch -v alsasrc device=hw:0,0 num-buffers=$((30*60*5)) ! \<o:p></o:p>         audio/x-raw-int, endianness=1234 ! \<o:p></o:p>         queue ! \<o:p></o:p>         TIAudenc1 engineName=codecServer codecName=aacheenc ! \<o:p></o:p>         qtmux  ! \<o:p></o:p>         rtpmp4vpay pt=96 ! \<o:p></o:p>         udpsink host=225.1.1.2 port=9010 auto-multicast=true<o:p></o:p> <o:p> </o:p> The pipeline doesn’t play – I get errors linking mp4mux to rtpmp4apay (caps don’t match). Using gst-inspect I see that qtmux has only 1 src - video/quicktime, and when looking at the rtpmp4 plugins none of them take that as a sink. So I’m unclear how I can stream the audio with rtp. Is there a different mux I can use that doesn’t put out video/quicktime, but still works with quicktime player? Or is there some other plugins to use between qtmux and one of the rtpmp4[a,v,g]pay plugins that will convert the caps to video/mpeg?<o:p></o:p> <o:p> </o:p> Thanks<o:p></o:p> eric<o:p></o:p> </div> </body> </html>