gst-launch locked with 2 source 2 sink

[Sérgio Agostinho]

Hey,

Without receiving data, your udpsrc element won't be able to transition
into a playing state. Because of this, your pipeline will wait for udpsrc
before allowing all other elements to start playing. Your easiest option is
to simply separate your pipeline into two.

gst-launch-1.0 filesrc location=/dev/pcm0.2 blocksize=256 do-timestamp=true
num-buffers=100000 ! "audio/x-alaw,rate=8000,channels=1" ! rtppcmapay !
udpsink async=true bind-port=10800 host=192.168.48.45 port=10800

and in another shell

gst-launch-1.0 udpsrc buffer-size=4096 socket=NULL port=10801
caps="application/x-rtp" ! rtppcmadepay ! filesink "buffer-mode=1"
"location=/dev/pcm0.1"

Cheers

2015-09-24 18:00 GMT+02:00 Aurele Traynard <aurele.traynard at gmail.com>:

> Hi everyone
>
>
> I'm facing an issue with a gst-launch configuration :
> filesrc -> rtppcmapay -> udpsink
> udpsrc -> rtppcmadepay -> filesink
>
> nothing is received on the udpsrc at first
>
> see commandline :
> gst-launch-1.0 filesrc location=/dev/pcm0.2 blocksize=256
> do-timestamp=true num-buffers=100000 ! "audio/x-alaw,rate=8000,channels=1"
> ! rtppcmapay ! udpsink async=true host=192.168.48.45 port=10800  udpsrc
> buffer-size=4096 socket=NULL port=10801 caps="application/x-rtp" !
> rtppcmadepay ! filesink "buffer-mode=1" "location=/dev/pcm0.1"
>
> after some read (I wrote the driver so I can see how much data is
> available and how much was read) gstreamer locks himself, nothing is read
> anymore...
> If I send some data to the udp socket everything start to be normal even
> if I stop to send data to the udp port 10801 ... So my understanding is
> that the udpsrc locks my pipeline, but I can't understand why... or maybe
> the udpsrc unlock my pipeline...
>
> If I launch only the following everything is working :
> filesrc -> rtppcmapay -> udpsink
> gst-launch-1.0 filesrc location=/dev/pcm0.2 blocksize=256
> do-timestamp=true num-buffers=100000 ! "audio/x-alaw,rate=8000,channels=1"
> ! rtppcmapay ! udpsink async=true bind-port=10800 host=192.168.48.45
> port=10800
>
>
> The goal is to have a 2 way communication between 2 device, and starting
> gstreamer at the same time on both device it seems we loose enough data
> during the startup phase to lock the stream...
>
> If anyone has an idea I will be really happy to test ;)
> Thanks for any help or question
> Aurele
>
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>
>
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