Azure Media Services v3 with Event Grid

Written on June 19, 2018

Walk through using the new Azure Media Services v3 API to create a workflow

Ok, so I need to create Azure Media Services account and a Service Principal to use for auth.

az group create –name AMS –location centralus

az storage account create --name mjsdemostrams \  
--kind StorageV2 \
--sku Standard_RAGRS \
--resource-group AMS

az ams account create –name mjsdemoams –resource-group AMS –storage-account mjsdemostrams

az ams account sp create –account-name mjsdemoams –resource-group AMS

  "AadClientId": "00000000-0000-0000-0000-00000000",
  "AadEndpoint": "",
  "AadSecret": "00000000-0000-0000-0000-00000000",
  "AadTenantId": "00000000-0000-0000-0000-00000000",
  "AccountName": "mjsdemoams",
  "ArmAadAudience": "",
  "ArmEndpoint": "",
  "Region": "Central US",
  "ResourceGroup": "AMS",
  "SubscriptionId": "00000000-0000-0000-0000-00000000"

Azure Function to process Encoding Job

I created a new repo that has a Function with Event Grid trigger from a blob that queues up a Media Services Encoding job.

Event Grid for Blob

Now I need an Event Grid subscription to to trigger an Azure Functions to kick of the encoding.

Storage Account Function

az storage account create --name mjsdemoamsfuncstr \
--sku Standard_LRS \
--resource-group AMS

Create a Function App

az functionapp create --resource-group AMS --consumption-plan-location centralus \
--name mjsdemoamsfunc --storage-account mjsdemoamsfuncstr  

Create a EventGrid Subscription

storageid=$(az storage account show --name mjsdemocdnstr --resource-group CDN --query id --output tsv)

az eventgrid event-subscription create \
  --resource-id $storageid \
  --name mjsdemoeventBlob2Func \
  --endpoint $endpoint

Create a MSI for Azure Functions

az webapp identity assign –name mjsdemoamsfunc –resource-group AMS

  "principalId": "00000000-0000-0000-0000-00000000",
  "tenantId": "00000000-0000-0000-0000-00000000",
  "type": "SystemAssigned"

Add MSI to as Media Services Contributor

az role assignment create –assignee 00000000-0000-0000-0000-00000000 –role Contributor –scope /subscriptions/00000000-0000-0000-0000-00000000/resourceGroups/AMS/providers/Microsoft.Media/mediaservices/mjsdemoams

Uploading files via CDN

Ok, so now I have the workflow linked up, time to upload some files. I figured I wanted a single Azure Media Service account but want my users to be able to upload their files quickly. Azure CDN can help here, I can create a CDN endpoint in each of the main regions which proxies back to a storage account back to the same region as AMS, this way I can save on region to region bandwidth but also give a good experience to my users.

curl -X PUT -T ./iOS.mp4 -H "x-ms-date: $(date -u)" -H "x-ms-blob-type: BlockBlob" "" -w "%{response_code};%{time_total}" > dataFile.txt 2> informationFile.txt

*24.639 seconds

curl -X PUT -T ./iOS.mp4 -H "x-ms-date: $(date -u)" -H "x-ms-blob-type: BlockBlob" "" -w "%{response_code};%{time_total}" > dataFile.txt 2> informationFile.txt

*18.746 seconds

So about a 30% improvement, I am sitting in New Zealand the storage account in the first command is in ‘US Central’ and the CDN endpoint in the second command is in ‘Australia East’

Written on June 19, 2018