[gst-devel] Problem with Recording Audio from a Network

[Zelalem Sintayehu]

The command I put in the last e-mail was wrong. The correct one is the following. I am thinking that it may be a reference for others. That is why i wanted to send the correct one.

gst-launch-0.10 -v udpsrc port=5002 caps="application/x-rtp,media=(string)audio,payload=(int)96, rate=(int)8000, encoding-name=(string)PCMA" ! queue ! rtppcmadepay ! 'audio/x-alaw, rate=(int)8000, channels=(int)1' ! queue ! avimux ! filesink location=audio.avi sync=false

Thank you again.

- Zelalem S. 

From: zelalems at hotmail.com
To: gstreamer-devel at lists.sourceforge.net
Date: Thu, 11 Jun 2009 13:03:49 +0300
Subject: Re: [gst-devel] Problem with Recording Audio from a Network








Hi Roope and Jyoti, thank you very much for your advice. It is now working. I copied the caps from the output of the sender for the caps (that was a very good advice). Anyway, I used the x-rtp for the udp caps and x-alaw in between the depayloader and the avimuxer. The following is the command:

gst-launch-0.10 -v udpsrc port=5002 caps="application/x-rtp,media=(string)audio,payload=(int)96, rate=(int)8000, encoding-name=(string)PCMA" ! queue ! rtppcmadepay ! 'audio/x-alaw, rate=(int)8000, channels=(int)1' ! queue ! alawdec ! audioconvert ! alsasink

I hope, i will not face any problem with mixing the video and audio. 

Thank you again.

- Zelalem S. 


From: roope.jarvinen at nokia.com
To: gstreamer-devel at lists.sourceforge.net
Date: Thu, 11 Jun 2009 10:15:37 +0200
Subject: Re: [gst-devel] Problem with Recording Audio from a Network










 
Hi Zelalem,
 
You can use rtppcmapay/depay and rtppcmupay/depay elements with 
alaw and ulaw.
 
Correct type for alaw is audio/x-alaw and not 
audio/x-alaw-int.
 
--Roope
 


  
  
  From: ext Zelalem Sintayehu 
  [mailto:zelalems at hotmail.com] 
Sent: 11 June, 2009 
  11:08
To: gstreamer-devel at lists.sourceforge.net
Subject: 
  Re: [gst-devel] Problem with Recording Audio from a 
  Network


  Hi Roope, you are right, it allows alaw,mulaw,ac3,mpeg and raw. But 
  alaw and mulaw don't have payloader and depayloader. Anyway, I tried to 
  recieve without depayloader but it still produced the same error. The 
  following is what  tried. Please help me.

gst-launch-0.10 -v 
  udpsrc port=5002 caps="audio/x-rtp,rate=1000,channels=1,depth=8" ! queue ! 
  audio/x-alaw-int,rate=1000,channels=1,depth=8 ! avimux ! filesink 
  location=audio.avi sync=false .   I also changed the caps for udpsrc with 
  "audio/x-alaw-int,rate=1000,channels=1,depth=8" but didn't work.

Thank 
  you.

- Zelalem S. 


  
  From: roope.jarvinen at nokia.com
To: 
  gstreamer-devel at lists.sourceforge.net
Date: Thu, 11 Jun 2009 09:35:58 
  +0200
Subject: Re: [gst-devel] Problem with Recording Audio from a 
  Network


  

   
   
  Hi,
   
  You cannot mux gsm-encoded audio into AVI container. Check 
  avimux description for allowed formats.
   
  --Roope
   

  
    
    
    


    Hi Jyoti, thank you for your prompt response. I added the 
    following caps statement, but it is still the same. The following is the 
    modified receiver side code.

gst-launch-0.10 -v udpsrc port=5002 
    caps="application/x-rtp,media=(string)audio,clock-rate=(int)8000,encoding-name=(string)GSM,encoding-params=(string)1,octet-align=(string)1" 
    ! queue ! rtpgsmdepay ! audio/x-raw-int,rate=8000,channels=1,depth=8 ! 
    avimux ! filesink location=audio.avi sync=false

The error is the 
    same: "WARNING: erroneous pipeline: could not link rtpgsmdepay0 to 
    avimux0"

Thank you.

- Zelalem S. 
    
-----------------------------------
From: 
    jyoti.d at allaboutif.com
To: 
    gstreamer-devel at lists.sourceforge.net
Subject: Re: [gst-devel] Problem 
    with Recording Audio from a Network

You should set caps property on 
    udpsrc element at receiver side.


 
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