This demo shows a very simple video processing workflow using the Azure Durable Functions extension and using version 3 of the Azure Functions runtime. It is based on the demo application in my Durable Functions Fundamentals course on Pluralsight
To run this locally from Visual Studio you will need to create your own local.settings.json file with the following contents (filling in your personal email address and SendGrid key in order to be able to send emails):
{
"IsEncrypted": false,
"Values": {
"AzureWebJobsStorage": "UseDevelopmentStorage=true",
"AzureWebJobsDashboard": "UseDevelopmentStorage=true",
"TranscodeBitRates": "1010,2020,3030",
"SendGridKey": "Your-SendGrid-Key-Here",
"ApproverEmail": "[email protected]",
"SenderEmail": "[email protected]",
"Host": "http://localhost:7071",
"FUNCTIONS_WORKER_RUNTIME": "dotnet"
}
}
To run in the cloud, you will need to create a Function App, configure App Settings for each of the settings shown above, and push the code to it (you can use right-click publish in Visual Studio).
To start an orchestration, you can simply call the starter function, making sure to include a video query string parameteter. When running locally, this URL will be: http://localhost:7071/api/ProcessVideoStarter?video=example.mp4
If you are running in the cloud, the URL will look something like this: https://myfunctionapp.azurewebsites.net/api/ProcessVideoStarter?code=yoursecretfunctioncode&video=example.mp4 You can find your secret function authorization code by clicking the get URL link for your function in the portal.
There is also a periodic task you can trigger with the StartPeriodicTask endpoint (available locally here), but it will run forever, so remember to terminate the orchestration (you can use StopPeriodicTask, or delete the function app once you're done.