UCAN Proof

This step assumes that you have w3 CLI (opens in a new tab) installed. Follow the Getting Started (opens in a new tab) instructions to create new space for storing data and register the space.

Get Livepeer Studio DID.

curl https://livepeer.studio/api/did

The response should contain the Livepeer Studio DID.

{
  "did": "did:key:z6Mkn1f6JUmxJi8Ht53SzeK3LSWNn9DRPsSfFLoPJWHVTCaX"
}

Create a UCAN delegation.

w3 delegation create <livepeer-studio-did-key> | base64

This returns the base64-encoded delegation proof which authorizes the Livepeer Studio DID to store data to your space. Note that the proof should not contain any whitespaces.

Upload Video to web3.storage

Make sure you have a video file uploaded to web3.storage. You can do upload a file using the w3 up command by following these instructions (opens in a new tab).

Transcode with Livepeer

This step assumes that you have already created a Livepeer Studio account (opens in a new tab) and an API key (opens in a new tab).

Submit the following request:

curl --location --request POST 'https://livepeer.studio/api/transcode' \
--header 'Authorization: Bearer $API_KEY' \
--header 'Content-Type: application/json' \
--data-raw '{
   "input":{
      "url":"$INPUT_VIDEO_URL"
   },
   "storage":{
      "type":"web3.storage",
      "credentials":{
         "proof":"$DELEGATION_PROOF"
      }
   },
   "outputs":{
      "hls":{
         "path":"/"
      },
      "mp4":{
         "path":"/"
      }
   },
   "profiles":[
      {
         "name":"480p",
         "bitrate":1000000,
         "fps":30,
         "width":854,
         "height":480
      },
      {
         "name":"360p",
         "bitrate":500000,
         "fps":30,
         "width":640,
         "height":360
      }
   ]
}'

• $API_KEY should be your Livepeer Studio API key
• $DELEGATION_PROOF should be the delegation proof you created using w3
• input.url should be the URL of the video you would like to transcode
• outputs.hls.path will be the relative path that the HLS playlist and mpegts segments will be found in when transcoding is complete
• outputs.mp4.path will be the path that the MP4 video files will be found in when transcoding is complete
• profiles is an optional parameter to specify the desired properties of transcoded video

Use the task ID in the response to query for the transcoding task status. Once the task is complete, you’ll see the output directory IPFS URL in the /api/task response in the output.transcodeFile.baseUrl field.

{
  "id": "...",
  "type": "transcode-file",
  "output": {
    "transcodeFile": {
      "baseUrl": "ipfs://bafybeiakkypfc7uzk6jnk6pg3f2fwumkahrmgbii7cigyyc7oejjo3ff4e",
      "hls": {
        "path": "/index.m3u8"
       },
      "mp4": [
            { "path": "/static360p0.mp4" },
            { "path": "/static720p0.mp4" },
            { "path": "/static1080p0.mp4" }
      ]
     }
   },
  ...
}

For more information about transcode API usage refer to the docs.