Azure Durable Functions : Video to GIF conversion

This application uses Azure Durable functions, Blob Storage, Event Grid, Application Insights and ffmpeg.

Provision Functions App and other resources

Use one of the below deploy options to provision the resources.

Deploy to Azure button

Deploy using Azure CLI

az group deployment create --resource-group <resource-group-name> --name <deployment-name>--template-file deploy.json 

Once deployed you should see below resources in the resource group.

• App Service plan(Premium EP1 plan, read more about Azure functions Premium plan)
• Storage account
• App Service - Function App
• Application Insights

Deploy application code

To deploy the functions application code please follow these steps. Or use VS Code to deploy the application.

Create Event Grid Subscription

In this application Event Grid is used to trigger the functions app when a new Video is added to videos blob containers. Before we create event grid subscription we need to get system key. Replace code= with your master key. https://<function-app-name>.azurewebsites.net/admin/host/systemkeys/eventgrid_extension?code=<master-key>

This should result in something like below.

{"name": "eventgrid_extension",
"value": "2aSighjJgTUxhaOaCBN91QA0y5celLfFP1WOKzTasdfdf2THig==",
"links": [{
"rel": "self",
"href": "https://<function-app-name>.azurewebsites.net/admin/host/systemkeys/eventgrid_extension"}]}

Use the value from above as the code=system-key in below set of commands. Open Azure Cloud Shell and execute below commands.

storageName= <storage-account-name>
endpoint='https://<function-app-name>.azurewebsites.net/runtime/webhooks/eventgrid?functionName=blobEGTrigger&code=<system-key>'
resourceGroup=resource-group-name
storageid=$(az storage account show --name $storageName --resource-group $resourceGroup --query id --output tsv)
az eventgrid event-subscription create \
  --source-resource-id $storageid \
  --name vid-to-gif-function-app \
  --endpoint $endpoint \
  --subject-begins-with '/blobServices/default/containers/videos'

Upload the Videos

Upload a video to Video container in your blob storage account.Wait for couple seconds and you should have a GIF created in Gifs blob container.