Live Audio Streaming over VOIP

I have a raspberry pi with wolfson pi audio card. I am able to stream live audio over voip using gstreamer, but sometimes i am getting the following error. Can anyone help me with this?

1. AL lib: alsa_reset_playback: snd_pcm_hw_params(data->pcmHandle, hp) failed: file descriptor in bad state

2. ERROR: pad_added_cb:assertion failed: (lres==GST_PAD_LINK_OK)

I am using the following pipeline

AUDIO SERVER :

gst-launch alsasrc ! audioconvert ! audio/x-raw-int,channels=1,depth=16,width=16, rate=44100 ! rtpL16pay ! udpsink host=127.0.0.1 port=5000

AUDIO CLIENT :

gst-launch udpsrc port=5000 caps="application/x-rtp, media=(string)audio, clock-rate=(int)44100, width=(int)16, height=(int)16, encoding-name=(string)L16, encoding-params=(string)1, channels=(int)1, channel-position=(int)1, payload=(int)96" ! gstrtpjitterbuffer do-lost=true ! rtpL16depay ! audioconvert ! alsasink sync=false

Thanks

pirpi

0 Former Member over 11 years ago

Are you really using “!” for the pipe function?

Maybe you should try to replace it by “|”.

JPL (AC9GH)
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0 Problemchild over 11 years ago

Personally I would first make sure you have done what Jean said ..... I'm assuming you have just made a typo but otherwise start here.

Secondly don't think you are the first with the error copy it in to Google and have a look at what others had as a result. In this case I found you duplicating this question on the RPI site. In that case remove the last part and repeat so you can get a flavour of what similar errors consist of and suggested work arounds!
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0 Former Member over 11 years ago in reply to Problemchild

First of all Thanks for your reply.
I am the same person who have posted the same question on RPI with different username.
I tried with replacing ! by | but it is not working.

Thanks
pirpi
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0 packetgeek over 11 years ago in reply to Former Member

For gstreamer, the proper symbol is the "!" (aka bang) vice the "|" pipe. Do you receive the error during streaming or while attempting to start streaming?
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0 Former Member over 11 years ago in reply to packetgeek

I am getting this error during streaming audio over voip. After getting this error audio streaming stops and we have to restart the streaming.

Thanks
pirpi.
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