rtpL16pay payload type

[Johannes Bauer]

Hello dear devs!

I am new to gstreamer and it seems to be an awesome tool, I downloaded gstreamer-1.0 SDK for windows and everything works fine, but I have one problem.

I want to stream a wav file to another client, which in fact is a VoiP client.
Everything works fine, by using decodebin and rtpL16pay into a rtpbin.
However it is only sending with payload type 98, but my client needs to get pt 11 rtp pakets.
I tried with g_object_set, but it doesn't change a thing.

   g_object_set(GST_OBJECT(rtpL16pay), "pt", 11, NULL);

Unfortunatly I cant post the complete code now since I am on vacation.
If anybody could give me hint here, how to change the payload type I would be very thankful.

Kind regards

JB
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[Sebastian Dröge-3]

On Sa, 2015-04-11 at 16:51 +0200, Johannes Bauer wrote:

> Hello dear devs!
>
> I am new to gstreamer and it seems to be an awesome tool, I downloaded gstreamer-1.0 SDK for windows and everything works fine, but I have one problem.
>
> I want to stream a wav file to another client, which in fact is a VoiP client.
> Everything works fine, by using decodebin and rtpL16pay into a rtpbin.
> However it is only sending with payload type 98, but my client needs to get pt 11 rtp pakets.
> I tried with g_object_set, but it doesn't change a thing.
>
>    g_object_set(GST_OBJECT(rtpL16pay), "pt", 11, NULL);
>
> Unfortunatly I cant post the complete code now since I am on vacation.
> If anybody could give me hint here, how to change the payload type I would be very thankful.

You can get the static payload types from the payloaders by using a
capsfilter and providing the static pt caps, e.g.

  gst-launch-1.0 audiotestsrc ! audioconvert ! rtpL16pay ! application/x-rtp,payload=11 ! fakesink

The property only seems to work for the dynamic pt range.

--
Sebastian Dröge, Centricular Ltd · http://www.centricular.com

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[amsts]

Hi,
I am facing the same problem. Are you able to solve your this problem.

Thank You



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[Johannes Bauer-2]

Hi amsts!

You can solve this using a capsfilter.

This one is for a MPA pipeline (pt=14):

rtpaudio = gst_element_factory_make("rtpmpapay", "rtpaudio");
        caps_rtp = gst_caps_new_simple("application/x-rtp", "media",
G_TYPE_STRING, "audio", "clock-rate", G_TYPE_INT, 90000,
"encoding-name", G_TYPE_STRING, "MPA", "channels", G_TYPE_INT, 1,
"payload", G_TYPE_INT, 14, NULL);

        rtpbin = gst_element_factory_make("rtpbin", "rtpbin");

then u have to link the payloader and the rtpbin with this function:

ret = gst_element_link_pads_filtered(rtpaudio, "src", rtpbin,
"send_rtp_sink_0", caps_rtp);
if (ret != TRUE) {
                Log(LOG_TYPE_ERROR, "RTP", "Streaming Elements rtpaudio and rtpbin
could not be linked!");
                return -1;
        }


Hope this helps

Kind regards
JB
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