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how to output rtp stream from a wav file by gstreamer pipeline

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brad2012

how to output rtp stream from a wav file by gstreamer pipeline

Hi all,

Does anyone have idea about :
using gst-launch command to output rtp stream from a wav file?
I just like to get rtp stream only for my rtp receiver,
When I try to use VLC to output a rtp stream, it will use dynamic RTP
payload type (96) for every rtp packet.
It seems does not correct type.
I would like to use gstreamer to generate a rtp stream for my rtp receiver .
Any ideas ?
Or where I can find the example?

Thanks!

Best Regards,
Soho
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Emile Semmes

Re: how to output rtp stream from a wav file by gstreamer pipeline

If your wav file is basically uncompressed audio (LPCM), if you take the
src pad from wavparse, you can payload it as L16 audio. For example:

filesrc ! wavparse ! rtpL16pay ! udpsink

You'll have to play with that pipeline a bit, but it should be enough to
get you started. Especially since you're streaming from a file, you'll
need to make sure you throttle it so the file seems like a live source
and it doesn't send it as fast as possible.

Also, VLC probably won't know the stream unless you provide it an .sdp
file with the media and payload defined in it.

HTH,
Emile

--
Emile Semmes
Software Consultant
e6 Group, LLC
www.e6group.com

On 8/26/2012 7:20 PM, Soho Soho123 wrote:

> Hi all,
>
> Does anyone have idea about :
> using gst-launch command to output rtp stream from a wav file?
> I just like to get rtp stream only for my rtp receiver,
> When I try to use VLC to output a rtp stream, it will use dynamic RTP
> payload type (96) for every rtp packet.
> It seems does not correct type.
> I would like to use gstreamer to generate a rtp stream for my rtp receiver .
> Any ideas ?
> Or where I can find the example?
>
> Thanks!
>
> Best Regards,
> Soho
> _______________________________________________
> gstreamer-devel mailing list
> [hidden email]
> http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel

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brad2012

Re: how to output rtp stream from a wav file by gstreamer pipeline

Hi Emile,

Thank you for your input!
the gst-launch command I will use:
gst-launch-0.10 -v filesrc location=/bin/audio_src_48k_le.wav !
wavparse ! rtpL16pay ! udpsink

How about to set the client ip and port?

And in advance about VLC,
Do you know how to inpur sdp information for VLC?
Since I have try to google the information about sdp for vlc. no any
helpful information about sdp.
the rtp payload type is 96 always.
Do you have idea?

Thanks!
Soho

2012/8/27 Emile Semmes <[hidden email]>:

> If your wav file is basically uncompressed audio (LPCM), if you take the src
> pad from wavparse, you can payload it as L16 audio. For example:
>
> filesrc ! wavparse ! rtpL16pay ! udpsink
>
> You'll have to play with that pipeline a bit, but it should be enough to get
> you started. Especially since you're streaming from a file, you'll need to
> make sure you throttle it so the file seems like a live source and it
> doesn't send it as fast as possible.
>
> Also, VLC probably won't know the stream unless you provide it an .sdp file
> with the media and payload defined in it.
>
> HTH,
> Emile
>
> --
> Emile Semmes
> Software Consultant
> e6 Group, LLC
> www.e6group.com
>
>
> On 8/26/2012 7:20 PM, Soho Soho123 wrote:
>>
>> Hi all,
>>
>> Does anyone have idea about :
>> using gst-launch command to output rtp stream from a wav file?
>> I just like to get rtp stream only for my rtp receiver,
>> When I try to use VLC to output a rtp stream, it will use dynamic RTP
>> payload type (96) for every rtp packet.
>> It seems does not correct type.
>> I would like to use gstreamer to generate a rtp stream for my rtp receiver
>> .
>> Any ideas ?
>> Or where I can find the example?
>>
>> Thanks!
>>
>> Best Regards,
>> Soho
>> _______________________________________________
>> gstreamer-devel mailing list
>> [hidden email]
>> http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
>
>
> _______________________________________________
> gstreamer-devel mailing list
> [hidden email]
> http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel

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brad2012

Re: how to output rtp stream from a wav file by gstreamer pipeline

In reply to this post by Emile Semmes

Hi Emile,

I try to generate rtp stream, the result is the same as vlc,
linux-72ut:/home/soho/g_media_render_0.10.36/Render_lib_related/bin #
./gst-launch-0.10 -v filesrc location=/home/soho/audio_test/1_48K.wav
! wavparse ! audioconvert ! rtpL16pay ! udpsink host=192.168.1.252
port=8554
Setting pipeline to PAUSED ...
Pipeline is PREROLLING ...
/GstPipeline:pipeline0/GstAudioConvert:audioconvert0.GstPad:src: caps
= audio/x-raw-int, endianness=(int)4321, signed=(boolean)true,
width=(int)16, depth=(int)16, rate=(int)48000, channels=(int)2
/GstPipeline:pipeline0/GstAudioConvert:audioconvert0.GstPad:sink: caps
= audio/x-raw-int, endianness=(int)1234, channels=(int)2,
width=(int)16, depth=(int)16, signed=(boolean)true, rate=(int)48000
/GstPipeline:pipeline0/GstRtpL16Pay:rtpl16pay0.GstPad:src: caps =
application/x-rtp, media=(string)audio, clock-rate=(int)48000,
encoding-name=(string)L16, encoding-params=(string)2, channels=(int)2,
payload=(int)96, ssrc=(uint)327125995, clock-base=(uint)3865385372,
seqnum-base=(uint)37935
/GstPipeline:pipeline0/GstRtpL16Pay:rtpl16pay0.GstPad:sink: caps =
audio/x-raw-int, endianness=(int)4321, signed=(boolean)true,
width=(int)16, depth=(int)16, rate=(int)48000, channels=(int)2
/GstPipeline:pipeline0/GstRtpL16Pay:rtpl16pay0: timestamp = 3865385372
/GstPipeline:pipeline0/GstRtpL16Pay:rtpl16pay0: seqnum = 37935
/GstPipeline:pipeline0/GstUDPSink:udpsink0.GstPad:sink: caps =
application/x-rtp, media=(string)audio, clock-rate=(int)48000,
encoding-name=(string)L16, encoding-params=(string)2, channels=(int)2,
payload=(int)96, ssrc=(uint)327125995, clock-base=(uint)3865385372,
seqnum-base=(uint)37935
Pipeline is PREROLLED ...
Setting pipeline to PLAYING ...
New clock: GstSystemClock
^CCaught interrupt -- handling interrupt.
Interrupt: Stopping pipeline ...
Execution ended after 42295409494 ns.
Setting pipeline to PAUSED ...
Setting pipeline to READY ...
/GstPipeline:pipeline0/GstUDPSink:udpsink0.GstPad:sink: caps = NULL
/GstPipeline:pipeline0/GstRtpL16Pay:rtpl16pay0: timestamp = 3867416200
/GstPipeline:pipeline0/GstRtpL16Pay:rtpl16pay0: seqnum = 44281
/GstPipeline:pipeline0/GstRtpL16Pay:rtpl16pay0.GstPad:sink: caps = NULL
/GstPipeline:pipeline0/GstRtpL16Pay:rtpl16pay0.GstPad:src: caps = NULL
/GstPipeline:pipeline0/GstAudioConvert:audioconvert0.GstPad:src: caps = NULL
/GstPipeline:pipeline0/GstAudioConvert:audioconvert0.GstPad:sink: caps = NULL
/GstPipeline:pipeline0/GstWavParse:wavparse0.GstPad:src: caps = NULL
Setting pipeline to NULL ...
Freeing pipeline ...
linux-72ut:/home/soho

the payload type is 96, too.
I can see every 7ms or 8ms a packet from server.
Do you have idea about why payload type is 96?

Thanks!
Soho

2012/8/27 Emile Semmes <[hidden email]>:

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