Generate a slideshow from a series of images

Slideshows are a great way for you to show off your images with a personal flare. Letting your users show holidays, special events or pictures of the family has never been so easy and customizable using the services we offer. In this demo, we use a combination of Robots to create a slideshow from a series of images, then apply a backing audio track.

When using 🤖/video/encode to generate a slideshow, the images used are merged in the order of their filenames. You could, for example, call them 1.jpg, 2.jpg, etc. and they will be used in the correct order.

From here we will upload a backing track for the slideshow, which in this case is provided by importing an audio track from a URL, but could also be uploaded by the user.

With duration: null, the slideshow will repeat the photos until the song is finished. You could also set duration: 9, so that it stops after the 3 photos display for 3 seconds each.

You can read more about advanced use cases in the Assembly Instructions docs.

⚠️ It seems your browser does not send the referer, which we need to stop people from (ab)using our demos in other websites. If you want to use the demos, please allow your browser to send its referer to us. Adding us to the allowlist of blockers usually helps.

Step 1: Handle uploads

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

⚠️ It seems your browser does not support the codec used in this video of the page. For demo simplicity we'll link you to the original file, but you may also want to learn how to make videos compatible for all browsers.

desert.jpg

Image – 1.5 MB
2560 × 2048

chameleon.jpg

Image – 8.9 MB
4799 × 3199

prinsengracht.jpg

Image – 14 MB
5195 × 3457

":original": {
  "robot": "/upload/handle"
}

🤖/upload/handle

This bot receives uploads that your users throw at you from browser or apps, or that you throw at us programmatically

Step 2: Import files from web servers

We are happy to import from whatever storage solution suits you best. Learn more ›

⚠️ It seems your browser does not support the codec used in this video of the page. For demo simplicity we'll link you to the original file, but you may also want to learn how to make videos compatible for all browsers.

joakim_karud-rock_angel-0.mp3

MP3 audio – 8.9 MB
3m53s

"imported_audio": {
  "robot": "/http/import",
  "result": true,
  "url": "https://demos.transloadit.com/inputs/joakim_karud-rock_angel.mp3"
}

🤖/http/import

This bot imports any file that is publicly available via a web URL into Transloadit

Step 3: Resize images to 1024×768 using the fillcrop strategy

We can resize, crop, and (auto-)rotate images, or apply watermarks and other effects, and much more. Learn more ›

⚠️ It seems your browser does not support the codec used in this video of the page. For demo simplicity we'll link you to the original file, but you may also want to learn how to make videos compatible for all browsers.

desert-0.jpg

Image – 289 KB
1024 × 768

chameleon-1.jpg

Image – 213 KB
1024 × 768

prinsengracht-2.jpg

Image – 335 KB
1024 × 768

"resized": {
  "use": ":original",
  "robot": "/image/resize",
  "result": true,
  "width": 1024,
  "height": 768,
  "resize_strategy": "fillcrop",
  "imagemagick_stack": "v3.0.0"
}

🤖/image/resize

This bot resizes, crops, changes colorization, rotation, and applies text and watermarks to images

Step 4: Merge audio and image to create a new video

We offer a variety of video encoding features like optimizing for different devices, merging, injecting ads, changing audio tracks, or adding company logos. Learn more ›

⚠️ It seems your browser does not support the codec used in this video of the page. For demo simplicity we'll link you to the original file, but you may also want to learn how to make videos compatible for all browsers.

joakim_karud-rock_angel-0.mp4

MPEG-4 video – 28 MB
3m54s · 1024 × 768

"merged": {
  "robot": "/video/merge",
  "use": {
    "steps": [
      {
        "name": "imported_audio",
        "as": "audio"
      },
      {
        "name": "resized",
        "as": "image"
      }
    ],
    "bundle_steps": true
  },
  "result": true,
  "framerate": "1/3",
  "ffmpeg_stack": "v6.0.0",
  "preset": "ipad-high",
  "resize_strategy": "fillcrop"
}

🤖/video/merge

This bot composes a new video by adding an audio track to existing still image(s) or video

Step 5: Export files to Amazon S3

We export to the storage platform of your choice. Learn more ›

:original

imported_audio

demos.transloadit.com/60/d7db47831a4055a4e0ff0b31c88582/joakim_karud-rock_angel.mp3

resized

merged

demos.transloadit.com/5f/253821da8945b5b4e4aa01e0bec21d/joakim_karud-rock_angel.mp4

Once all files have been exported, we can ping a URL of your choice with the Assembly status JSON.

"exported": {
  "use": [
    "imported_audio",
    "resized",
    "merged",
    ":original"
  ],
  "robot": "/s3/store",
  "credentials": "YOUR_AWS_CREDENTIALS",
  "url_prefix": "https://demos.transloadit.com/"
}

🤖/s3/store

This bot exports encoding results to Amazon S3

Since this is a store Robot, be sure to use Template Credentials so that any sensitive data is encrypted and stored in our database, making sure that they’re never exposed to any end-user.

Live Demo. See for yourself

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

Build this in your own language

{
  "steps": {
    ":original": {
      "robot": "/upload/handle"
    },
    "imported_audio": {
      "robot": "/http/import",
      "result": true,
      "url": "https://demos.transloadit.com/inputs/joakim_karud-rock_angel.mp3"
    },
    "resized": {
      "use": ":original",
      "robot": "/image/resize",
      "result": true,
      "width": 1024,
      "height": 768,
      "resize_strategy": "fillcrop",
      "imagemagick_stack": "v3.0.0"
    },
    "merged": {
      "robot": "/video/merge",
      "use": {
        "steps": [
          {
            "name": "imported_audio",
            "as": "audio"
          }, 
,          {
            "name": "resized",
            "as": "image"
          }
        ],
        "bundle_steps": true
      },
      "result": true,
      "framerate": "1/3",
      "ffmpeg_stack": "v6.0.0",
      "preset": "ipad-high",
      "resize_strategy": "fillcrop"
    },
    "exported": {
      "use": ["imported_audio", "resized", "merged", ":original"],
      "robot": "/s3/store",
      "credentials": "YOUR_AWS_CREDENTIALS",
      "url_prefix": "https://demos.transloadit.com/"
    }
  }
}

# Prerequisites: brew install curl jq || sudo apt install curl jq
# To avoid tampering, use Signature Authentication
echo '{
  "template_id": undefined,
  "auth": {
    "key": "YOUR_TRANSLOADIT_KEY"
  },
  "steps": {
    ":original": {
      "robot": "/upload/handle"
    },
    "imported_audio": {
      "robot": "/http/import",
      "result": true,
      "url": "https://demos.transloadit.com/inputs/joakim_karud-rock_angel.mp3"
    },
    "resized": {
      "use": ":original",
      "robot": "/image/resize",
      "result": true,
      "width": 1024,
      "height": 768,
      "resize_strategy": "fillcrop",
      "imagemagick_stack": "v3.0.0"
    },
    "merged": {
      "robot": "/video/merge",
      "use": {
        "steps": [
          {
            "name": "imported_audio",
            "as": "audio"
          }, 
,          {
            "name": "resized",
            "as": "image"
          }
        ],
        "bundle_steps": true
      },
      "result": true,
      "framerate": "1/3",
      "ffmpeg_stack": "v6.0.0",
      "preset": "ipad-high",
      "resize_strategy": "fillcrop"
    },
    "exported": {
      "use": ["imported_audio", "resized", "merged", ":original"],
      "robot": "/s3/store",
      "credentials": "YOUR_AWS_CREDENTIALS",
      "url_prefix": "https://demos.transloadit.com/"
    }
  }
}' |curl \
    --request POST \
    --form 'params=<-' \
    --form myfile1=@./chameleon.jpg \
    --form myfile2=@./prinsengracht.jpg \
    --form myfile3=@./desert.jpg \
  https://api2.transloadit.com/assemblies \
|jq

Read docs: cURL

// Install via Swift Package Manager:
// dependencies: [
//   .package(url: "https://github.com/transloadit/TransloaditKit", .upToNextMajor(from: "3.0.0"))
// ]

// Or via CocoaPods:
// pod 'Transloadit', '~> 3.0.0'

// Auth
let credentials = Credentials(key: "YOUR_TRANSLOADIT_KEY")

// Init
let transloadit = Transloadit(credentials: credentials, session: "URLSession.shared")

// Add files to upload
let filesToUpload: [URL] = ...

// Execute
let assembly = transloadit.assembly(steps: [_originalStep, imported_audioStep, resizedStep, mergedStep, exportedStep], andUpload: filesToUpload) { result in
  switch result {
  case .success(let assembly):
    print("Retrieved (assembly)")
  case .failure(let error):
    print("Assembly error (error)")
  }
}.pollAssemblyStatus { result in
  switch result {
  case .success(let assemblyStatus):
    print("Received assemblystatus (assemblyStatus)")
  case .failure(let error):
    print("Caught polling error (error)")
  }

Read docs: TransloaditKit

<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,
        // To avoid tampering, use Signature Authentication:
        // https://transloadit.com/docs/topics/signature-authentication/
        auth: {
          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: {
          ':original': {
            robot: '/upload/handle',
          },
          imported_audio: {
            robot: '/http/import',
            result: true,
            url: 'https://demos.transloadit.com/inputs/joakim_karud-rock_angel.mp3',
          },
          resized: {
            use: ':original',
            robot: '/image/resize',
            result: true,
            width: 1024,
            height: 768,
            resize_strategy: 'fillcrop',
            imagemagick_stack: 'v3.0.0',
          },
          merged: {
            robot: '/video/merge',
            use: {
              steps: [
                {
                  name: 'imported_audio',
                  as: 'audio',
                }, 
,                {
                  name: 'resized',
                  as: 'image',
                }, 
              ],
              bundle_steps: true,
            },
            result: true,
            framerate: '1/3',
            ffmpeg_stack: 'v6.0.0',
            preset: 'ipad-high',
            resize_strategy: 'fillcrop',
          },
          exported: {
            use: ['imported_audio', 'resized', 'merged', ':original'],
            robot: '/s3/store',
            credentials: 'YOUR_AWS_CREDENTIALS',
            url_prefix: 'https://demos.transloadit.com/',
          },
        },
      })
    })
  </script>
</body>

Read docs: jQuery SDK

<!-- This pulls Uppy from our CDN -->
<!-- For smaller self-hosted bundles, install Uppy and plugins manually: -->
<!-- npm i --save @uppy/core @uppy/dashboard @uppy/remote-sources @uppy/transloadit ... -->
<link
  href="https://releases.transloadit.com/uppy/v3.22.2/uppy.min.css"
  rel="stylesheet"
/>
<button id="browse">Select Files</button>
<script type="module">
  import {
    Uppy,
    Dashboard,
    ImageEditor,
    RemoteSources,
    Transloadit,
  } from 'https://releases.transloadit.com/uppy/v3.22.2/uppy.min.mjs'
  const uppy = new Uppy()
    .use(Transloadit, {
      waitForEncoding: true,
      alwaysRunAssembly: true,
      assemblyOptions: {
        params: {
          // To avoid tampering, use Signature Authentication:
          // https://transloadit.com/docs/topics/signature-authentication/
          auth: {
            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: {
            ':original': {
              robot: '/upload/handle',
            },
            imported_audio: {
              robot: '/http/import',
              result: true,
              url: 'https://demos.transloadit.com/inputs/joakim_karud-rock_angel.mp3',
            },
            resized: {
              use: ':original',
              robot: '/image/resize',
              result: true,
              width: 1024,
              height: 768,
              resize_strategy: 'fillcrop',
              imagemagick_stack: 'v3.0.0',
            },
            merged: {
              robot: '/video/merge',
              use: {
                steps: [
                  {
                    name: 'imported_audio',
                    as: 'audio',
                  }, 
,                  {
                    name: 'resized',
                    as: 'image',
                  }, 
                ],
                bundle_steps: true,
              },
              result: true,
              framerate: '1/3',
              ffmpeg_stack: 'v6.0.0',
              preset: 'ipad-high',
              resize_strategy: 'fillcrop',
            },
            exported: {
              use: ['imported_audio', 'resized', 'merged', ':original'],
              robot: '/s3/store',
              credentials: 'YOUR_AWS_CREDENTIALS',
              url_prefix: 'https://demos.transloadit.com/',
            },
          },
        },
      },
    })
    .use(Dashboard, { trigger: '#browse' })
    .use(ImageEditor, { target: Dashboard })
    .use(RemoteSources, {
      companionUrl: 'https://api2.transloadit.com/companion',
    })
    .on('complete', ({ transloadit }) => {
      // Due to `waitForEncoding:true` this is fired after encoding is done.
      // Alternatively, set `waitForEncoding` to `false` and provide a `notify_url`
      console.log(transloadit) // Array of Assembly Statuses
      transloadit.forEach((assembly) => {
        console.log(assembly.results) // Array of all encoding results
      })
    })
    .on('error', (error) => {
      console.error(error)
    })
</script>

Read docs: Uppy File Uploader

// yarn add transloadit || npm i transloadit

// Import
const Transloadit = require('transloadit')

// Init
const transloadit = new Transloadit({
  authKey: 'YOUR_TRANSLOADIT_KEY',
  authSecret: 'MY_TRANSLOADIT_SECRET',
})

// Set Encoding Instructions
const options = {
  files: {
    myfile_1: './chameleon.jpg',
    myfile_2: './prinsengracht.jpg',
    myfile_3: './desert.jpg',
  },
  params: {
    steps: {
      ':original': {
        robot: '/upload/handle',
      },
      imported_audio: {
        robot: '/http/import',
        result: true,
        url: 'https://demos.transloadit.com/inputs/joakim_karud-rock_angel.mp3',
      },
      resized: {
        use: ':original',
        robot: '/image/resize',
        result: true,
        width: 1024,
        height: 768,
        resize_strategy: 'fillcrop',
        imagemagick_stack: 'v3.0.0',
      },
      merged: {
        robot: '/video/merge',
        use: {
          steps: [
            {
              name: 'imported_audio',
              as: 'audio',
            }, 
,            {
              name: 'resized',
              as: 'image',
            }, 
          ],
          bundle_steps: true,
        },
        result: true,
        framerate: '1/3',
        ffmpeg_stack: 'v6.0.0',
        preset: 'ipad-high',
        resize_strategy: 'fillcrop',
      },
      exported: {
        use: ['imported_audio', 'resized', 'merged', ':original'],
        robot: '/s3/store',
        credentials: 'YOUR_AWS_CREDENTIALS',
        url_prefix: 'https://demos.transloadit.com/',
      },
    },
  },
}

// Execute
const result = await transloadit.createAssembly(options)

// Show results
console.log({ result })

Read docs: Node SDK

# [sudo] npm install transloadify -g

# Auth
export TRANSLOADIT_KEY="YOUR_TRANSLOADIT_KEY"

# Save Encoding Instructions
echo '{
  "steps": {
    ":original": {
      "robot": "/upload/handle"
    },
    "imported_audio": {
      "robot": "/http/import",
      "result": true,
      "url": "https://demos.transloadit.com/inputs/joakim_karud-rock_angel.mp3"
    },
    "resized": {
      "use": ":original",
      "robot": "/image/resize",
      "result": true,
      "width": 1024,
      "height": 768,
      "resize_strategy": "fillcrop",
      "imagemagick_stack": "v3.0.0"
    },
    "merged": {
      "robot": "/video/merge",
      "use": {
        "steps": [
          {
            "name": "imported_audio",
            "as": "audio"
          }, 
,          {
            "name": "resized",
            "as": "image"
          }
        ],
        "bundle_steps": true
      },
      "result": true,
      "framerate": "1/3",
      "ffmpeg_stack": "v6.0.0",
      "preset": "ipad-high",
      "resize_strategy": "fillcrop"
    },
    "exported": {
      "use": ["imported_audio", "resized", "merged", ":original"],
      "robot": "/s3/store",
      "credentials": "YOUR_AWS_CREDENTIALS",
      "url_prefix": "https://demos.transloadit.com/"
    }
  }
}' > ./steps.json

# Execute
transloadify \
  --input "chameleon.jpg" \
  --input "prinsengracht.jpg" \
  --input "desert.jpg" \
  --steps "./steps.json" \
  --output "./output.example"

Read docs: Transloadify

// composer require transloadit/php-sdk
use transloadit\Transloadit;

$transloadit = new Transloadit([
  "key" => "YOUR_TRANSLOADIT_KEY",
  "secret" => "MY_TRANSLOADIT_SECRET",
]);

// Start the Assembly
$response = $transloadit->createAssembly([
  "files" => ["chameleon.jpg", "prinsengracht.jpg", "desert.jpg"],
  "params" => [
    "steps" => [
      ":original" => [
        "robot" => "/upload/handle",
      ],
      "imported_audio" => [
        "robot" => "/http/import",
        "result" => true,
        "url" => "https://demos.transloadit.com/inputs/joakim_karud-rock_angel.mp3",
      ],
      "resized" => [
        "use" => ":original",
        "robot" => "/image/resize",
        "result" => true,
        "width" => 1024,
        "height" => 768,
        "resize_strategy" => "fillcrop",
        "imagemagick_stack" => "v3.0.0",
      ],
      "merged" => [
        "robot" => "/video/merge",
        "use" => [
          "steps" => [
            [
              "name" => "imported_audio",
              "as" => "audio",
            ], 
,            [
              "name" => "resized",
              "as" => "image",
            ], 
          ],
          "bundle_steps" => true,
        ],
        "result" => true,
        "framerate" => "1/3",
        "ffmpeg_stack" => "v6.0.0",
        "preset" => "ipad-high",
        "resize_strategy" => "fillcrop",
      ],
      "exported" => [
        "use" => ["imported_audio", "resized", "merged", ":original"],
        "robot" => "/s3/store",
        "credentials" => "YOUR_AWS_CREDENTIALS",
        "url_prefix" => "https://demos.transloadit.com/",
      ],
    ],
  ],
]);

Read docs: PHP SDK

# gem install transloadit

# $ irb -rubygems
# >> require 'transloadit'
# => true

transloadit = Transloadit.new([
  :key => "YOUR_TRANSLOADIT_KEY",
])

# Set Encoding Instructions
_original = transloadit.step(":original", "/upload/handle", {})

imported_audio = transloadit.step("imported_audio", "/http/import", [
  :result => true,
  :url => "https://demos.transloadit.com/inputs/joakim_karud-rock_angel.mp3"
])

resized = transloadit.step("resized", "/image/resize", [
  :use => ":original",
  :result => true,
  :width => 1024,
  :height => 768,
  :resize_strategy => "fillcrop",
  :imagemagick_stack => "v3.0.0"
])

merged = transloadit.step("merged", "/video/merge", [
  :use => [
    :steps => [[
      :name => "imported_audio",
      :as => "audio"
    ], [
      :name => "resized",
      :as => "image"
    ]],
    :bundle_steps => true
  ],
  :result => true,
  :framerate => "1/3",
  :ffmpeg_stack => "v6.0.0",
  :preset => "ipad-high",
  :resize_strategy => "fillcrop"
])

exported = transloadit.step("exported", "/s3/store", [
  :use => ["imported_audio", "resized", "merged", ":original"],
  :credentials => "YOUR_AWS_CREDENTIALS",
  :url_prefix => "https://demos.transloadit.com/"
])

transloadit.assembly([
  :steps => [_original, imported_audio, resized, merged, exported]
])

# Add files to upload
files = []
files.push("chameleon.jpg")
files.push("prinsengracht.jpg")
files.push("desert.jpg")

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

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

if !response.error?
  # handle success
end

Read docs: Ruby SDK

# pip install pytransloadit
from transloadit import client

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

# Set Encoding Instructions
assembly.add_step(":original", "/upload/handle", {})

assembly.add_step("imported_audio", "/http/import", {
  'result': True,
  'url': 'https://demos.transloadit.com/inputs/joakim_karud-rock_angel.mp3'
})

assembly.add_step("resized", "/image/resize", {
  'use': ':original',
  'result': True,
  'width': 1024,
  'height': 768,
  'resize_strategy': 'fillcrop',
  'imagemagick_stack': 'v3.0.0'
})

assembly.add_step("merged", "/video/merge", {
  'use': {
    'steps': [{
      'name': 'imported_audio',
      'as': 'audio'
    }, {
      'name': 'resized',
      'as': 'image'
    }],
    'bundle_steps': True
  },
  'result': True,
  'framerate': '1/3',
  'ffmpeg_stack': 'v6.0.0',
  'preset': 'ipad-high',
  'resize_strategy': 'fillcrop'
})

assembly.add_step("exported", "/s3/store", {
  'use': ['imported_audio', 'resized', 'merged', ':original'],
  'credentials': 'YOUR_AWS_CREDENTIALS',
  'url_prefix': 'https://demos.transloadit.com/'
})

# Add files to upload
assembly.add_file(open('chameleon.jpg', 'rb'))
assembly.add_file(open('prinsengracht.jpg', 'rb'))
assembly.add_file(open('desert.jpg', 'rb'))

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

print(assembly_response.data.get('assembly_ssl_url'))
# or:
print(assembly_response.data['assembly_ssl_url'])

Read docs: Python SDK

// go get gopkg.in/transloadit/go-sdk.v1
package main

import (
  "context"
  "fmt"
  "github.com/transloadit/go-sdk"
)

func main() {
  // Create client
  options := transloadit.DefaultConfig
  options.AuthKey = "YOUR_TRANSLOADIT_KEY"
  options.AuthSecret = "MY_TRANSLOADIT_SECRET"
  client := transloadit.NewClient(options)
  
  // Initialize new Assembly
  assembly := transloadit.NewAssembly()
  
  // Set Encoding Instructions
  assembly.AddStep(":original", map[string]interface{}{
    "robot": "/upload/handle",
  })
  
  assembly.AddStep("imported_audio", map[string]interface{}{
    "robot": "/http/import",
    "result": true,
    "url": "https://demos.transloadit.com/inputs/joakim_karud-rock_angel.mp3",
  })
  
  assembly.AddStep("resized", map[string]interface{}{
    "use": ":original",
    "robot": "/image/resize",
    "result": true,
    "width": 1024,
    "height": 768,
    "resize_strategy": "fillcrop",
    "imagemagick_stack": "v3.0.0",
  })
  
  assembly.AddStep("merged", map[string]interface{}{
    "robot": "/video/merge",
    "use": map[string]interface{}{
      "steps": [
        map[string]interface{}{
          "name": "imported_audio",
          "as": "audio",
        }, 
  ,      map[string]interface{}{
          "name": "resized",
          "as": "image",
        }, 
      ],
      "bundle_steps": true,
    },
    "result": true,
    "framerate": "1/3",
    "ffmpeg_stack": "v6.0.0",
    "preset": "ipad-high",
    "resize_strategy": "fillcrop",
  })
  
  assembly.AddStep("exported", map[string]interface{}{
    "use": ["imported_audio", "resized", "merged", ":original"],
    "robot": "/s3/store",
    "credentials": "YOUR_AWS_CREDENTIALS",
    "url_prefix": "https://demos.transloadit.com/",
  })
  
  // Add files to upload
  assembly.AddFile("chameleon.jpg"))
  assembly.AddFile("prinsengracht.jpg"))
  assembly.AddFile("desert.jpg"))
  
  // 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 check some results at: ")
  fmt.Printf("  - %s\n", info.Results[":original"][0].SSLURL)
  fmt.Printf("  - %s\n", info.Results["imported_audio"][0].SSLURL)
  fmt.Printf("  - %s\n", info.Results["resized"][0].SSLURL)
  fmt.Printf("  - %s\n", info.Results["merged"][0].SSLURL)
  fmt.Printf("  - %s\n", info.Results["exported"][0].SSLURL)
}

Read docs: Go SDK

// implementation 'com.transloadit.sdk:transloadit:1.0.0

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) {
    // Initialize the Transloadit client
    Transloadit transloadit = new Transloadit("YOUR_TRANSLOADIT_KEY", "MY_TRANSLOADIT_SECRET");
    
    Assembly assembly = transloadit.newAssembly();
    
    // Set Encoding Instructions
    Map<String, Object> _originalStepOptions = new HashMap();
    assembly.addStep(":original", "/upload/handle", _originalStepOptions);
    
    Map<String, Object> imported_audioStepOptions = new HashMap();
    imported_audioStepOptions.put("result", true);
    imported_audioStepOptions.put("url", "https://demos.transloadit.com/inputs/joakim_karud-rock_angel.mp3");
    assembly.addStep("imported_audio", "/http/import", imported_audioStepOptions);
    
    Map<String, Object> resizedStepOptions = new HashMap();
    resizedStepOptions.put("use", ":original");
    resizedStepOptions.put("result", true);
    resizedStepOptions.put("width", 1024);
    resizedStepOptions.put("height", 768);
    resizedStepOptions.put("resize_strategy", "fillcrop");
    resizedStepOptions.put("imagemagick_stack", "v3.0.0");
    assembly.addStep("resized", "/image/resize", resizedStepOptions);
    
    Map<String, Object> mergedStepOptions = new HashMap();
    mergedStepOptions.put("use", {
        "steps": new String[] { {
          "name": "imported_audio",
          "as": "audio",
        }, {
          "name": "resized",
          "as": "image",
        } },
        "bundle_steps": true,
      });
    mergedStepOptions.put("result", true);
    mergedStepOptions.put("framerate", "1/3");
    mergedStepOptions.put("ffmpeg_stack", "v6.0.0");
    mergedStepOptions.put("preset", "ipad-high");
    mergedStepOptions.put("resize_strategy", "fillcrop");
    assembly.addStep("merged", "/video/merge", mergedStepOptions);
    
    Map<String, Object> exportedStepOptions = new HashMap();
    exportedStepOptions.put("use", new String[] { "imported_audio", "resized", "merged", ":original" });
    exportedStepOptions.put("credentials", "YOUR_AWS_CREDENTIALS");
    exportedStepOptions.put("url_prefix", "https://demos.transloadit.com/");
    assembly.addStep("exported", "/s3/store", exportedStepOptions);
    
    // Add files to upload
    assembly.addFile(new File("chameleon.jpg"));
    assembly.addFile(new File("prinsengracht.jpg"));
    assembly.addFile(new File("desert.jpg"));
    
    // Start the Assembly
    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
    }
  }
}

Read docs: Java SDK

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.
Back-end 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.

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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

Generate a slideshow from a series of images

Step 1: Handle uploads

Step 2: Import files from web servers

Step 3: Resize images to 1024×768 using the fillcrop strategy

Step 4: Merge audio and image to create a new video

Step 5: Export files to Amazon S3

Live Demo. See for yourself

Build this in your own language

So many ways to integrate

Bulk imports

Handling uploads

Front-end integration

Back-end integration

Pingbacks

Try it in your account

Other cool demos