[SPAM (Keyword)] - queue problem

[Wesley J. Miller]

Hi Hoggins!

Let me introduce you to ytour Bgstreamer Best Friend, gst-inspect.  It
amounts to help for the elements.  If you gst-inspect shout2 sne d you;ll
see it has no src pads.  In other words, it is a terminal element, a sink,
into which data flows from the pipeline and ouyt of which data flows into
something else, in this case, the icecast server.

What that means is, you can't hook shout2send to a downstream element like
queue.  That's where your error is coming from.

Being very visual, here is a better picture of your pipe.  Pullling the
elements to a single column shows you the flow of data free from the
extraneous stuff in the other column(s).  I omitted the "string" and "int"
decorators to improve readability.  They are not required with gst-launch.
 They don't hurt, though, and may be needed occasionally, so feel free to
use them or not.

gst-launch
        Gstrtpbin
                name=rtpbin
        Udpsrc
                port=5000
                caps='application/x-rtp, media=audio, clock-rate=44100,
                encoding-name=CELT, encoding-params=2,
                frame-size=(string)480, payload=96'
        ! Rtpceltdepay
        ! Celtdec
        ! Queue
        ! Audioconvert
        ! Lame
                bitrate=320
        ! shout2send
                mount=/live320.mp3
                port=8000 password=xxxx ip=127.0.0.1
        ! Queue
        ! Audioconvert
        ! lame
                bitrate=320
        ! shout2send mount=/live320.mp3
                port=8000 password=xxxx ip=127.0.0.1


Here we see that shout2send is wupposed to flow into queue.  But
gst-inspect tells us that won't work.

I believe what you're missing is a "tee" after the celtdec element.  Tee
accepts a stream on its sink pad and can copy it to multiple src pads.
You use a tee by giving iy a name and then later hooking up its second,
third, etc. outputs by using the tee's name.  The first stream flows
straight out the other side of the tee.

gst-launch
        Gstrtpbin
        Udpsrc
        ! Rtpceltdepay
        ! Celtdec
        ! Tee name=myTee.
        ! Queue
        ! Audioconvert
        ! Lame
        ! shout2send            <==== first pipe "ends" here
        myTee.                  <==== no !, period is required, starts 2nd pipe
        ! Queue                 <==== always good after a tee for sync and starvation reasons
        ! Audioconvert
        ! lame
        ! shout2send mount=/live320.mp3



Now, I have never used shout2send.  But you ought to be able to move the
tee/queue pairs to just before the shout2sned element and avoid
duplicating work in the two pipelines.

gst-launch
        Gstrtpbin
        Udpsrc
        ! Rtpceltdepay
        ! Celtdec
        ! Audioconvert
        ! Lame
        ! Tee name=myTee.
        ! Queue
        ! shout2send
        myTee.
        ! Queue
        ! shout2send mount=/live320.mp3



One other thought.  Gst-inspect will also tell you the type for each
property of an element.  In you case, Frame-size is an int, not a string

Wesley J. Miller









On 10/1/11 10:40 AM, "Hoggins!" <fuckspam at wheres5.com> wrote:

>Hello list,
>
>I'm new here, and I'm posting for the first time with a little problem,
>mostly due to my lack of knowledge. I'm sure it has already been
>discussed here, but I can't find it in the list's archives.
>
>I'm trying to receive audio from another Gstreamer sender (which works
>perfectly, I'm able to receive clear sound on a test machine), and
>duplicate it in several flavours on an Icecast server. So the Gstreamer
>receives the CELT data, depays, decodes, and then uses different queues
>to encode it in mp3 (320kbps, 192kbps, and so on), and send it as
>different mountpoints on the Icecast server.
>
>I'm able to send it once, but I cannot duplicate the streams, using the
>queue element. Can anyone tell me what I'm doing wrong ? The following
>syntax throws an error : "pipeline error : can't connect shout2send0 to
>queue1".
>
>
>gst-launch gstrtpbin name=rtpbin udpsrc port=5000
>caps='application/x-rtp, media=(string)audio, clock-rate=(int)44100,
>encoding-name=(string)CELT, encoding-params=(string)2,
>frame-size=(string)480, payload=(int)96' ! rtpceltdepay ! celtdec !
>queue ! audioconvert ! lame bitrate=320 ! shout2send mount=/live320.mp3
>port=8000 password=xxxx ip=127.0.0.1 ! queue ! audioconvert ! lame
>bitrate=320 ! shout2send mount=/live320.mp3 port=8000 password=xxxx
>ip=127.0.0.1
>
>Thanks in advance,
>
>    Hoggins!
>


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