AW: Sending and receiving RTP audio

[Matthias Dodt]

Hi Kapil!
 
Thanks for the hint! It turned out (thanks to wesley) that the reason
was the missing audioresample plugin (before directsoundsink). I think
dropped packets shouldn't be a problem in my scenario (GBit switch and
just 2 PCs connected). But still i will keep that MTU-related problem in
mind-
 
Thanks!
 
cheers
 
mat

________________________________

Von:
gstreamer-devel-bounces+mdodt=xion-medical.com at lists.freedesktop.org
[mailto:gstreamer-devel-bounces+mdodt=xion-medical.com at lists.freedesktop
.org] Im Auftrag von Kapil Agrawal
Gesendet: 08 September 2011 11:48
An: Discussion of the development of and with GStreamer
Betreff: Re: Sending and receiving RTP audio


Mat,

I think this is related to the data being lost during transmission, as I
faced similar issue in one project.
I fixed that by configuring rtppay in such a way that mtu is fixed and
of some 1400 bytes.

Not sure if you have similar issue.

Best Luck
Kapil


On Thu, Sep 8, 2011 at 3:04 PM, Matthias Dodt <MDodt at xion-medical.com>
wrote:


	Hey guys!
	
	I use OSSBuild with Gstreamer 10.7 (Beta4) on Win7 to transmit
an audio
	test signal via UDP/Multicast. It works, but the sound is awful
on the
	receiver side.
	
	Sender:
	gst-launch -v gstrtpbin name=rtpbin audiotestsrc ! audioconvert
!
	rtpL16pay ! rtpbin.send_rtp_sink_1 rtpbin.send_rtp_src_1 !
udpsink
	port=5002 host=224.0.1.5  rtpbin.send_rtcp_src_1 ! udpsink
port=5003
	host=224.0.1.5 sync=false async=false udpsrc port=5007 !
	rtpbin.recv_rtcp_sink_1
	
	Receiver:
	gst-launch -v gstrtpbin name=rtpbin udpsrc
uri=udp://224.0.1.5:5002
	
caps=application/x-rtp,clock-rate=(int)44100,encoding-name=(string)L16,m
	edia=(string)audio,channels=(int)1 ! rtpbin.recv_rtp_sink_0
rtpbin. !
	rtpL16depay ! audioconvert ! directsoundsink udpsrc
	uri=udp://224.0.1.5:5003 ! rtpbin.recv_rtcp_sink_0
	rtpbin.send_rtcp_src_0 ! udpsink port=5007 host=224.0.1.5
sync=false
	async=false
	
	I think it must have something to do with the 'caps' or a buffer
	problem. Any ideas?
	
	Thanks!
	
	Best,
	
	mat
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-- 
www.mediamagictechnologies.com (Gstreamer, ffmpeg, Red5, Streaming)
twitter handle: @gst_kaps
http://www.linkedin.com/in/kapilagrawal

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