High-quality FLAC encoding

Transloadit offers a FLAC preset to easily encode audio files into FLAC.

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1. Receive files sent by users or apps

Transloadit can handle uploads of your users directly. Learn more ›

joakim_karud-rock_angel.mp3

9.3 MB · 3m 53.2s · Rock Angel by Joakim Karud

We handle uploads that your users throw at you from browser or apps, or that you throw at us programatically:

tl.addFile('file', './joakim_karud-rock_angel.mp3')

2. Encode audio to Flac

Transloadit offers a variety of features to reduce audio size while maintaining quality, as well as add effects like loops or watermarks. Learn more ›

joakim_karud-rock_angel-0.flac

24 MB · 3m 53.2s

flac_encoded: {
  use: [':original'],
  robot: '/audio/encode',
  preset: 'flac',
}

/audio/encode Robot

This bot converts audio files into all kinds of formats for you. We provide encoding presets for the most common formats

3. Export files to Amazon S3

Transloadit is happy to export to whatever storage solution suits you best. Learn more ›

:original

s3.amazonaws.com/demos.transloadit.com/96/6600f0277e11e8be00b9712a117033/joakim_karud-rock_angel.mp3

flac_encoded

s3.amazonaws.com/demos.transloadit.com/97/a9cb90277e11e8b0d175fe8ba6178c/joakim_karud-rock_angel.flac

Once files are exported, we ping you back with the Assembly status JSON.

exported: {
  use: ['flac_encoded',':original'],
  robot: '/s3/store',
  credentials: 'demo_s3_credentials',
}

/s3/store Robot

This bot exports encoding results to Amazon S3

Since this is a store robot, be sure to use Templates so that any credentials are encrypted and stored in our database, making sure that they’re never exposed to any end-user.

Try it yourself

This live demo is powered by Uppy, our open source file uploader that you can also use without Transloadit, and tus, our open protocol for resumable file uploads that is making uploading more reliable across the world.

Full code used

This demo uses :original, a magic word to identify uploads that Transloadit accepted.

{
  "steps": {
    "flac_encoded": {
      "use": [":original"],
      "robot": "/audio/encode",
      "result": true,
      "ffmpeg_stack": "v2.2.3",
      "preset": "flac"
    },
    "exported": {
      "use": ["flac_encoded", ":original"],
      "robot": "/s3/store",
      "credentials": "demo_s3_credentials"
    }
  }
}

// Add 'Transloadit' to your Podfile, run 'pod install', add credentials to 'Info.plist'
import Arcane
import TransloaditKit

// Add instructions, e.g. resize image, or encode video
var AssemblySteps: Array = Array<Step>() // An array to hold the Steps

var Step1 = Step (key: "flac_encoded") // Create a Step object
Step1?.setValue([":original"], forOption: "use") // Add the details
Step1?.setValue("/audio/encode", forOption: "robot") // Add the details
Step1?.setValue(true, forOption: "result") // Add the details
Step1?.setValue("v2.2.3", forOption: "ffmpeg_stack") // Add the details
Step1?.setValue("flac", forOption: "preset") // Add the details
AssemblySteps.append(Step1) // Add the Step to the array

var Step2 = Step (key: "exported") // Create a Step object
Step2?.setValue(["flac_encoded",":original"], forOption: "use") // Add the details
Step2?.setValue("/s3/store", forOption: "robot") // Add the details
Step2?.setValue("demo_s3_credentials", forOption: "credentials") // Add the details
AssemblySteps.append(Step2) // Add the Step to the array

// We then create an Assembly Object with the Steps and files
var MyAssembly: Assembly = Assembly(steps: AssemblySteps, andNumberOfFiles: 1)

// Add files to upload
MyAssembly.addFile("./joakim_karud-rock_angel.mp3") // Add the file)

// Start the Assembly
Transloadit.createAssembly(MyAssembly) 

// Fires after your Assembly has completed
transloadit.assemblyStatusBlock = {(_ completionDictionary: [AnyHashable: Any]) -> Void in
  print("\(completionDictionary.description)")
}

<body>
  <form action="/uploads" enctype="multipart/form-data" method="POST">
    <input type="file" name="my_file" multiple="multiple" />
  </form>

  <script src="//ajax.googleapis.com/ajax/libs/jquery/3.2.0/jquery.min.js"></script>
  <script src="//assets.transloadit.com/js/jquery.transloadit2-v3-latest.js"></script>
  <script type="text/javascript">
  $(function() {
    $('form').transloadit({
      wait: true,
      triggerUploadOnFileSelection: true,
      params: {
        auth: {
          // To avoid tampering use signatures:
          // https://transloadit.com/docs/api-docs/#authentication
          key: 'YOUR_TRANSLOADIT_KEY',
        },
        // It's often better store encoding instructions in your account
        // and use a `template_id` instead of adding these steps inline
        steps: {
          flac_encoded: {
            use: [':original'],
            robot: '/audio/encode',
            result: true,
            ffmpeg_stack: 'v2.2.3',
            preset: 'flac'
          },
          exported: {
            use: ['flac_encoded',':original'],
            robot: '/s3/store',
            credentials: 'demo_s3_credentials'
          }
        }
      }
    });
  });
  </script>
</body>

<link href="https://transloadit.edgly.net/releases/uppy/v0.24.0/dist/uppy.min.css" rel="stylesheet">
<script src="https://transloadit.edgly.net/releases/uppy/v0.24.0/dist/uppy.min.js"></script>

<button id="uppy-open-modal">Select Files</button>
<script>
  const uppy = Uppy.Core({ debug: true, autoProceed: false })
    .use(Uppy.Transloadit, {
      params: {
        auth: {
          // To avoid tampering use signatures:
          // https://transloadit.com/docs/api-docs/#authentication          
          key: 'YOUR_TRANSLOADIT_KEY'
        },
        // It's often better store encoding instructions in your account
        // and use a `template_id` instead of adding these steps inline
        steps: {
          flac_encoded: {
            use: [':original'],
            robot: '/audio/encode',
            result: true,
            ffmpeg_stack: 'v2.2.3',
            preset: 'flac'
          },
          exported: {
            use: ['flac_encoded',':original'],
            robot: '/s3/store',
            credentials: 'demo_s3_credentials'
          }
        }
      },
      waitForEncoding: true
    })
    .use(Uppy.Dashboard, {
      trigger: '#uppy-open-modal',
      target: 'body'
    })
    .use(Uppy.Webcam, { target: Uppy.Dashboard })
    .use(Uppy.Instagram, { target: Uppy.Dashboard, host: 'https://api2.transloadit.com/uppy-server' })
    .on('transloadit:result', (stepName, result) => {
      // use transloadit encoding result here.
      console.log('Result here ====>', stepName, result)
    })
    .run()
</script>

// npm install transloadit --save
const TransloaditClient = require('transloadit')

const transloadit = new TransloaditClient({
  authKey: 'YOUR_TRANSLOADIT_KEY',
  authSecret: 'YOUR_TRANSLOADIT_SECRET'
})

transloadit.addFile('myfile_1', './joakim_karud-rock_angel.mp3')

const options = {
  params: {
    steps: {
      flac_encoded: {
        use: [':original'],
        robot: '/audio/encode',
        result: true,
        ffmpeg_stack: 'v2.2.3',
        preset: 'flac',
      },
      exported: {
        use: ['flac_encoded',':original'],
        robot: '/s3/store',
        credentials: 'demo_s3_credentials',
      },
    }
  }
}

transloadit.createAssembly(options, (err, result) => {
  if (err) {
    throw err
  }

  console.log({result})
})

npm install transloadify -g

export TRANSLOADIT_KEY="YOUR_TRANSLOADIT_KEY"
export TRANSLOADIT_SECRET="YOUR_TRANSLOADIT_SECRET"

echo '{
  "flac_encoded": {
    "use": [":original"],
    "robot": "/audio/encode",
    "result": true,
    "ffmpeg_stack": "v2.2.3",
    "preset": "flac"
  },
  "exported": {
    "use": ["flac_encoded",":original"],
    "robot": "/s3/store",
    "credentials": "demo_s3_credentials"
  }
}' > ./steps.json

transloadify \
  --input ./lolcat.jpg \
  --output ./resized-lolcat.jpg \
  --steps ./steps.json

// Install "transloadit/php-sdk"
// via Composer (https://getcomposer.org)
use transloadit\Transloadit;
$transloadit = new Transloadit([
  "key" => "YOUR_TRANSLOADIT_KEY",
  "secret" => "YOUR_TRANSLOADIT_SECRET",
]);

$files = [];
array_push($files, "./joakim_karud-rock_angel.mp3");

$response = $transloadit->createAssembly([
  "files" => $files, 
  "params" => [
    "steps" => [
      "flac_encoded" => [
        "use" => [":original"],
        "robot" => "/audio/encode",
        "result" => true,
        "ffmpeg_stack" => "v2.2.3",
        "preset" => "flac",
      ],
      "exported" => [
        "use" => ["flac_encoded",":original"],
        "robot" => "/s3/store",
        "credentials" => "demo_s3_credentials",
      ],
    ],
  ],
]);

# gem install transloadit
transloadit = Transloadit.new(
  :key => "YOUR_TRANSLOADIT_KEY",
  :secret => "YOUR_TRANSLOADIT_SECRET"
)

# Add instructions, e.g. resize image, or encode video
flac_encoded = transloadit.step "flac_encoded", "/audio/encode",
  :use => [":original"],
  :result => true,
  :ffmpeg_stack => "v2.2.3",
  :preset => "flac"
)
exported = transloadit.step "exported", "/s3/store",
  :use => ["flac_encoded",":original"],
  :credentials => "demo_s3_credentials"
)

assembly = transloadit.assembly(
  :steps => [ flac_encoded, exported ]
)

# Add files to upload
files = []
files.push("./joakim_karud-rock_angel.mp3")

# Start the Assembly
response = assembly.create! *files

until response.finished?
  sleep 1; response.reload!
end

if !response.error?
  # handle success
end

# pip install pytransloadit
from transloadit import client

tl = client.Transloadit('YOUR_TRANSLOADIT_KEY', 'YOUR_TRANSLOADIT_SECRET')
assembly = tl.new_assembly()

# Add instructions, e.g. resize image, or encode video
assembly.add_step('flac_encoded', {
  'use': [':original'],
  'robot': '/audio/encode',
  'result': true,
  'ffmpeg_stack': 'v2.2.3',
  'preset': 'flac'
})
assembly.add_step('exported', {
  'use': ['flac_encoded',':original'],
  'robot': '/s3/store',
  'credentials': 'demo_s3_credentials'
})

# Add files to upload
assembly.add_file(open('./joakim_karud-rock_angel.mp3', 'rb'))

# Start the Assembly
assembly_response = assembly.create(retries=5, wait=True)

print assembly_response.data.get('assembly_id')

# or
print assembly_response.data['assembly_id']

// go get gopkg.in/transloadit/go-sdk.v1
options := transloadit.DefaultConfig
options.AuthKey = "YOUR_TRANSLOADIT_KEY"
options.AuthSecret = "YOUR_TRANSLOADIT_SECRET"
client := transloadit.NewClient(options)

// Initialize new assembly
assembly := transloadit.NewAssembly()

// Add instructions, e.g. resize image, or encode video
assembly.AddStep("flac_encoded", map[string]interface{}{
  "use": [":original"],
  "robot": "/audio/encode",
  "result": true,
  "ffmpeg_stack": "v2.2.3",
  "preset": "flac"
})
assembly.AddStep("exported", map[string]interface{}{
  "use": ["flac_encoded",":original"],
  "robot": "/s3/store",
  "credentials": "demo_s3_credentials"
})

// Add files to upload
assembly.AddFile("myfile_1", "./joakim_karud-rock_angel.mp3")

// Start the Assembly
info, err := client.StartAssembly(context.Background(), assembly)
if err != nil {
  panic(err)
}

// All files have now been uploaded and the Assembly has started but no
// results are available yet since the conversion has not finished.
// WaitForAssembly provides functionality for polling until the Assembly
// has ended.
info, err = client.WaitForAssembly(context.Background(), info)
if err != nil {
  panic(err)
}

fmt.Printf("You can view the result at: %s\n", info.Results["resize"][0].SSLURL)

// compile 'com.transloadit.sdk:transloadit:0.0.3'
import com.transloadit.sdk.Assembly;
import com.transloadit.sdk.Transloadit;
import com.transloadit.sdk.exceptions.LocalOperationException;
import com.transloadit.sdk.exceptions.RequestException;
import com.transloadit.sdk.response.AssemblyResponse;

import java.io.File;
import java.util.HashMap;
import java.util.Map;

public class Main {
    public static void main(String[] args) {
        Transloadit transloadit = new Transloadit("YOUR_TRANSLOADIT_KEY", "YOUR_TRANSLOADIT_SECRET");
        Assembly assembly = transloadit.newAssembly();
        // Add instructions, e.g. resize image, or encode video
        
        Map<String, Object> flacEncodedStepOptions = new HashMap<>();
        flacEncodedStepOptions.put("use", new String[]{ ":original" });
        flacEncodedStepOptions.put("result", true);
        flacEncodedStepOptions.put("ffmpeg_stack", "v2.2.3");
        flacEncodedStepOptions.put("preset", "flac");
        assembly.addStep("flac_encoded", "/audio/encode", flacEncodedStepOptions);
        
        Map<String, Object> exportedStepOptions = new HashMap<>();
        exportedStepOptions.put("use", new String[]{ "flac_encoded", ":original" });
        exportedStepOptions.put("credentials", "demo_s3_credentials");
        assembly.addStep("exported", "/s3/store", exportedStepOptions);
        
        // Add files to upload
        assembly.addFile(new File("./joakim_karud-rock_angel.mp3"));
        
        try {
            AssemblyResponse response = assembly.save();

            // wait for assembly to finish executing.
            while (!response.isFinished()) {
                response = transloadit.getAssemblyByUrl(response.getSslUrl());
            }

            System.out.println(response.getId());
            System.out.println(response.getUrl());
            System.out.println(response.json());
        } catch (RequestException | LocalOperationException e) {
            // handle exception here
        }
    }
}

So many ways to integrate

Transloadit is a service for companies with developers. As a developer, there are many ways you can put us to good use.

Bulk imports

Add one of our import Robots to acquire and transcode massive media libraries.
Handling uploads

We are the experts at reliably handling uploads. We wrote the protocol for it.
Front-end integration

We integrate with web browsers via our next-gen file uploader Uppy and SDKs for Android and iOS.
Backend integration

Send us batch jobs in any server language using one of our SDKs or directly interfacing with our REST API.
Pingbacks

Configure a notify_url to let your server receive transcoding results JSON in the transloadit POST field.

Try it in your account

Copy these instructions to a Template of your own
(you'll be able to make changes before actually saving)

Copy to Template

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We are a Swiss Army knife for your files

High-quality FLAC encoding

1. Receive files sent by users or apps

2. Encode audio to Flac

3. Export files to Amazon S3

Try it yourself

Full code used

So many ways to integrate

Bulk imports

Handling uploads

Front-end integration

Backend integration

Pingbacks

Try it in your account

Get started for free

Other cool demos

We are a Swiss Army knife for your files

High-quality FLAC encoding

1. Receive files sent by users or apps

2. Encode audio to Flac

3. Export files to Amazon S3

Try it yourself

Full code used

So many ways to integrate

Bulk imports

Handling uploads

Front-end integration

Backend integration

Pingbacks

Try it in your account

Get started for free

Sign up with email

Other cool demos