Play an audio stream into a call
This code snippet plays an audio stream into the specified call.
Example
Replace the following variables in the example code:
| Key | Description |
|---|---|
UUID |
the UUID of the call into which to play an audio stream. |
URL |
The URL of the audio file that will be streamed into an array. The URL must be in an array. |
Prerequisites
Use your existing application
Modifying an existing call requires that the UUID provided is a currently active call. To modify a call, you must use the same NEXMO_APPLICATION_ID and private key that were used to create the call.
Generate your JWT
Execute the following command at your terminal prompt to create the JWT for authentication:
export JWT=$(nexmo jwt:generate $PATH_TO_PRIVATE_KEY application_id=$NEXMO_APPLICATION_ID)Write the code
Add the following to play-audio-into-a-call.sh:
curl -X PUT https://api.nexmo.com/v1/calls/$UUID/stream \
-H "Authorization: Bearer "$JWT\
-H "Content-Type: application/json"\
-d '{"stream_url": ["https://raw.githubusercontent.com/nexmo-community/ncco-examples/gh-pages/assets/welcome_to_nexmo.mp3"]}'
Run your code
Save this file to your machine and run it:
bash play-audio-into-a-call.shPrerequisites
Use your existing application
Modifying an existing call requires that the UUID provided is a currently active call. To modify a call, you must use the same NEXMO_APPLICATION_ID and private key that were used to create the call.
Install dependencies
npm install nexmoInitialize your dependencies
Create a file named stream-audio-into-call.js and add the following code:
const Nexmo = require('nexmo');
const nexmo = new Nexmo({
apiKey: NEXMO_API_KEY,
apiSecret: NEXMO_API_SECRET,
applicationId: NEXMO_APPLICATION_ID,
privateKey: NEXMO_PRIVATE_KEY
}, {debug: true});
Write the code
Add the following to stream-audio-into-call.js:
const URL = 'https://nexmo-community.github.io/ncco-examples/assets/voice_api_audio_streaming.mp3';
nexmo.calls.stream.start(UUID, { stream_url: [URL], loop: 0 }, (err, res) => {
if(err) { console.error(err); }
else {
console.log(res);
}
});
function stop_stream (){
nexmo.calls.stream.stop(UUID, (err, res) => {
if(err) { console.error(err); }
else {
console.log(res);
}
});
}
setTimeout(stop_stream, 5000); // delay 5 seconds
Run your code
Save this file to your machine and run it:
node stream-audio-into-call.jsPrerequisites
Use your existing application
Modifying an existing call requires that the UUID provided is a currently active call. To modify a call, you must use the same NEXMO_APPLICATION_ID and private key that were used to create the call.
Install dependencies
Add the following to `build.gradle`:
compile 'com.nexmo:client:5.2.1'Initialize your dependencies
Create a class named StreamAudioToCall and add the following code to the main method:
NexmoClient client = NexmoClient.builder()
.applicationId(NEXMO_APPLICATION_ID)
.privateKeyPath(NEXMO_PRIVATE_KEY_PATH)
.build();
Write the code
Add the following to the main method of the StreamAudioToCall class:
client.getVoiceClient().startStream(UUID, URL, 0);
Run your code
We can use the application plugin for Gradle to simplify the running of our application.
Update your build.gradle with the following:
apply plugin: 'application'
mainClassName = project.hasProperty('main') ? project.getProperty('main') : ''
Run the following gradle command to execute your application, replacing com.nexmo.quickstart.voice with the package containing StreamAudioToCall:
gradle run -Pmain=com.nexmo.quickstart.voice.StreamAudioToCallPrerequisites
Use your existing application
Modifying an existing call requires that the UUID provided is a currently active call. To modify a call, you must use the same NEXMO_APPLICATION_ID and private key that were used to create the call.
Install dependencies
Install-Package Nexmo.Csharp.ClientInitialize your dependencies
Create a file named VoiceSender.cs and add the following code:
var client = new Client(creds: new Nexmo.Api.Request.Credentials
{
ApiKey = "NEXMO_API_KEY",
ApiSecret = "NEXMO_API_SECRET",
ApplicationId = "NEXMO_APPLICATION_ID",
ApplicationKey = "NEXMO_APPLICATION_PRIVATE_KEY"
});
Write the code
Add the following to VoiceSender.cs:
var result = client.Call.BeginStream(UUID, new Call.StreamCommand
{
stream_url = new[] { "https://nexmo-community.github.io/ncco-examples/assets/voice_api_audio_streaming.mp3" }
});
Prerequisites
Use your existing application
Modifying an existing call requires that the UUID provided is a currently active call. To modify a call, you must use the same NEXMO_APPLICATION_ID and private key that were used to create the call.
Install dependencies
composer require nexmo/clientInitialize your dependencies
Create a file named index.php and add the following code:
$keypair = new \Nexmo\Client\Credentials\Keypair(
file_get_contents(NEXMO_APPLICATION_PRIVATE_KEY_PATH),
NEXMO_APPLICATION_ID
);
$client = new \Nexmo\Client($keypair);
Write the code
Add the following to index.php:
$stream = $client->calls[UUID]->stream();
$stream->setUrl('https://nexmo-community.github.io/ncco-examples/assets/voice_api_audio_streaming.mp3');
$stream->put();
Run your code
Save this file to your machine and run it:
php index.phpPrerequisites
Use your existing application
Modifying an existing call requires that the UUID provided is a currently active call. To modify a call, you must use the same NEXMO_APPLICATION_ID and private key that were used to create the call.
Install dependencies
pip install nexmoInitialize your dependencies
Create a file named play-audio-stream-into-call.py and add the following code:
import nexmo
client = nexmo.Client(
application_id=APPLICATION_ID,
private_key=APPLICATION_PRIVATE_KEY_PATH
)
Write the code
Add the following to play-audio-stream-into-call.py:
stream_url = 'https://nexmo-community.github.io/ncco-examples/assets/voice_api_audio_streaming.mp3'
client.send_audio(NEXMO_CALL_UUID, stream_url=[stream_url])
Run your code
Save this file to your machine and run it:
python3 play-audio-stream-into-call.pyPrerequisites
Use your existing application
Modifying an existing call requires that the UUID provided is a currently active call. To modify a call, you must use the same NEXMO_APPLICATION_ID and private key that were used to create the call.
Install dependencies
gem install nexmoInitialize your dependencies
Create a file named play-audio-stream-into-call.rb and add the following code:
client = Nexmo::Client.new(
application_id: NEXMO_APPLICATION_ID,
private_key: File.read(NEXMO_APPLICATION_PRIVATE_KEY_PATH)
Write the code
Add the following to play-audio-stream-into-call.rb:
AUDIO_URL = 'https://nexmo-community.github.io/ncco-examples/assets/voice_api_audio_streaming.mp3'
response = client.voice.stream.start(UUID, stream_url: [AUDIO_URL])
Run your code
Save this file to your machine and run it:
ruby play-audio-stream-into-call.rbTry it out
When you run the code an audio stream from the file specified is played into the call identified with the specified UUID.