Re: [pulseaudio-discuss] Problem to receive RTP stream from ffmpeg

[Antoine Vacher]

Hello,

Any idea? I am still not figuring out what's wrong in my setup.

Thanks,

Antoine

- Mail original -
De: "Antoine Vacher" 
À: "pulseaudio-discuss" 
Envoyé: Mercredi 6 Juin 2018 20:41:10
Objet: [pulseaudio-discuss] Problem to receive RTP stream from ffmpeg

Hello,

I struggle to perform my house audio setup. Let me explain:

I have at home a raspberry pi with a USB microphone running under raspbian. 
Pulseaudio is not (and cannot) be installed on it. I stream the microphone with 
ffmpeg with the following command:

arecord -D pcm.duplex -c2 -r 48000 -f S32_LE -t wav -V mono | avconv -i - 
-acodec libmp3lame -b 32k -f rtp rtp://225.5.5.5:1234/4

The streaming works correctly as I can listen to the audio from my laptop with 
the following command:

ffplay rtp://225.5.5.5:1234

Now I have a home server where I have a tool that needs to use "rec" to work. 
Therefore I want to create a RTP source for the RTP stream and forward it to 
"rec" as default input.

I checked with cli-visualizer script (configured for pulseaudio) and the 
following command works on the home server:

ffplay rtp://225.5.5.5:1234 -nodisp

Pulseaudio runs in system mode on the server, I tried to create a RTP source in 
/etc/pulse/system.pa by adding

load-module module-null-sink sink_name=rtp
load-module module-rtp-recv sink=rtp sap_address=225.5.5.5
set-default-source rtp.monitor

There is no speakers on the server so I cannot verify if sound is played, 
however if I run cli-visualizer then there is no activity so my guess is that 
RTP stream is not captured by pulseaudio.

Do you see what I miss?

There is a lot of tutorials to stream RTP *from* pulseaudio, but there is a lot 
less help to send a RTP stream *to* pulseaudio that is not coming from another 
pulseaudio.

Thanks!

Antoine

--
Antoine Vacher
mail/jabber: antoine.vac...@tigre-bleu.net
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[pulseaudio-discuss] Problem to receive RTP stream from ffmpeg

[Antoine Vacher]

Hello,

I struggle to perform my house audio setup. Let me explain:

I have at home a raspberry pi with a USB microphone running under raspbian. 
Pulseaudio is not (and cannot) be installed on it. I stream the microphone with 
ffmpeg with the following command:

arecord -D pcm.duplex -c2 -r 48000 -f S32_LE -t wav -V mono | avconv -i - 
-acodec libmp3lame -b 32k -f rtp rtp://225.5.5.5:1234/4

The streaming works correctly as I can listen to the audio from my laptop with 
the following command:

ffplay rtp://225.5.5.5:1234

Now I have a home server where I have a tool that needs to use "rec" to work. 
Therefore I want to create a RTP source for the RTP stream and forward it to 
"rec" as default input.

I checked with cli-visualizer script (configured for pulseaudio) and the 
following command works on the home server:

ffplay rtp://225.5.5.5:1234 -nodisp

Pulseaudio runs in system mode on the server, I tried to create a RTP source in 
/etc/pulse/system.pa by adding

load-module module-null-sink sink_name=rtp
load-module module-rtp-recv sink=rtp sap_address=225.5.5.5
set-default-source rtp.monitor

There is no speakers on the server so I cannot verify if sound is played, 
however if I run cli-visualizer then there is no activity so my guess is that 
RTP stream is not captured by pulseaudio.

Do you see what I miss?

There is a lot of tutorials to stream RTP *from* pulseaudio, but there is a lot 
less help to send a RTP stream *to* pulseaudio that is not coming from another 
pulseaudio.

Thanks!

Antoine

--
Antoine Vacher
mail/jabber: antoine.vac...@tigre-bleu.net
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