/// <summary>
/// Run the sample async.
/// </summary>
/// <param name="config">The param is of type ConfigWrapper. This class reads values from local configuration file.</param>
/// <returns></returns>
private static async Task RunAsync(ConfigWrapper config)
{
IAzureMediaServicesClient client;
try
{
client = await Authentication.CreateMediaServicesClientAsync(config, UseInteractiveAuth);
}
catch (Exception e)
{
Console.Error.WriteLine("TIP: Make sure that you have filled out the appsettings.json or .env file before running this sample.");
Console.Error.WriteLine($"{e.Message}");
return;
}
// Set the polling interval for long running operations to 2 seconds.
// The default value is 30 seconds for the .NET client SDK
client.LongRunningOperationRetryTimeout = 2;
// Creating a unique suffix so that we don't have name collisions if you run the sample
// multiple times without cleaning up.
string uniqueness = Guid.NewGuid().ToString("N");
string jobName = $"job-{uniqueness}";
string locatorName = $"locator-{uniqueness}";
string outputAssetName = $"output-{uniqueness}";
bool stopEndpoint = false;
// In this sample, we use Event Grid to listen to the notifications through an Azure Event Hub.
// If you do not provide an Event Hub config in the settings, the sample will fall back to polling the job for status.
// For production ready code, it is always recommended to use Event Grid instead of polling on the Job status.
EventProcessorClient processorClient = null;
BlobContainerClient storageClient = null;
MediaServicesEventProcessor mediaEventProcessor = null;
try
{
// Ensure that you have the desired encoding Transform. This is really a one time setup operation.
Transform transform = await GetOrCreateTransformAsync(client, config.ResourceGroup, config.AccountName, AdaptiveStreamingTransformName);
// Output from the encoding Job must be written to an Asset, so let's create one
Asset outputAsset = await CreateOutputAssetAsync(client, config.ResourceGroup, config.AccountName, outputAssetName);
Job job = await SubmitJobAsync(client, config.ResourceGroup, config.AccountName, AdaptiveStreamingTransformName, outputAsset.Name, jobName);
try
{
// First we will try to process Job events through Event Hub in real-time. If this fails for any reason,
// we will fall-back on polling Job status instead.
// Please refer README for Event Hub and storage settings.
// A storage account is required to process the Event Hub events from the Event Grid subscription in this sample.
// Create a new host to process events from an Event Hub.
Console.WriteLine("Creating a new client to process events from an Event Hub...");
var credential = new DefaultAzureCredential();
var storageConnectionString = string.Format("DefaultEndpointsProtocol=https;AccountName={0};AccountKey={1}",
config.StorageAccountName, config.StorageAccountKey);
var blobContainerName = config.StorageContainerName;
var eventHubsConnectionString = config.EventHubConnectionString;
var eventHubName = config.EventHubName;
var consumerGroup = config.EventHubConsumerGroup;
storageClient = new BlobContainerClient(
storageConnectionString,
blobContainerName);
processorClient = new EventProcessorClient(
storageClient,
consumerGroup,
eventHubsConnectionString,
eventHubName);
// Create an AutoResetEvent to wait for the job to finish and pass it to EventProcessor so that it can be set when a final state event is received.
AutoResetEvent jobWaitingEvent = new(false);
// Create a Task list, adding a job waiting task and a timer task. Other tasks can be added too.
IList <Task> tasks = new List <Task>();
// Add a task to wait for the job to finish. The AutoResetEvent will be set when a final state is received by EventProcessor.
Task jobTask = Task.Run(() => jobWaitingEvent.WaitOne());
tasks.Add(jobTask);
// 30 minutes timeout.
var cancellationSource = new CancellationTokenSource();
var timeout = Task.Delay(30 * 60 * 1000, cancellationSource.Token);
tasks.Add(timeout);
mediaEventProcessor = new MediaServicesEventProcessor(jobName, jobWaitingEvent, null);
processorClient.ProcessEventAsync += mediaEventProcessor.ProcessEventsAsync;
processorClient.ProcessErrorAsync += mediaEventProcessor.ProcessErrorAsync;
await processorClient.StartProcessingAsync(cancellationSource.Token);
// Wait for tasks.
if (await Task.WhenAny(tasks) == jobTask)
{
// Job finished. Cancel the timer.
cancellationSource.Cancel();
// Get the latest status of the job.
job = await client.Jobs.GetAsync(config.ResourceGroup, config.AccountName, AdaptiveStreamingTransformName, jobName);
}
else
{
// Timeout happened, Something might go wrong with job events. Fall-back on polling instead.
jobWaitingEvent.Set();
throw new Exception("Timeout happened.");
}
}
catch (Exception)
{
Console.WriteLine("Warning: Failed to connect to Event Hub, please refer README for Event Hub and storage settings.");
// Polling is not a recommended best practice for production applications because of the latency it introduces.
// Overuse of this API may trigger throttling. Developers should instead use Event Grid.
Console.WriteLine("Polling job status...");
job = await WaitForJobToFinishAsync(client, config.ResourceGroup, config.AccountName, AdaptiveStreamingTransformName, jobName);
}
if (job.State == JobState.Finished)
{
Console.WriteLine("Job finished.");
if (!Directory.Exists(OutputFolderName))
{
Directory.CreateDirectory(OutputFolderName);
}
// Generate a new random token signing key to use
RNGCryptoServiceProvider rng = new();
rng.GetBytes(TokenSigningKey);
//Create the content key policy that configures how the content key is delivered to end clients
// via the Key Delivery component of Azure Media Services.
ContentKeyPolicy policy = await GetOrCreateContentKeyPolicyAsync(client, config.ResourceGroup, config.AccountName, ContentKeyPolicyName);
StreamingLocator locator = await CreateStreamingLocatorAsync(client, config.ResourceGroup, config.AccountName, outputAsset.Name, locatorName, ContentKeyPolicyName);
// We are using the ContentKeyIdentifierClaim in the ContentKeyPolicy which means that the token presented
// to the Key Delivery Component must have the identifier of the content key in it. Since we didn't specify
// a content key when creating the StreamingLocator, the system created a random one for us. In order to
// generate our test token we must get the ContentKeyId to put in the ContentKeyIdentifierClaim claim.
string keyIdentifier = locator.ContentKeys.First().Id.ToString();
string token = GetTokenAsync(Issuer, Audience, keyIdentifier, TokenSigningKey);
StreamingEndpoint streamingEndpoint = await client.StreamingEndpoints.GetAsync(config.ResourceGroup,
config.AccountName, MyStreamingEndpointName);
if (streamingEndpoint.ResourceState != StreamingEndpointResourceState.Running)
{
Console.WriteLine("Streaming Endpoint was Stopped, restarting now..");
await client.StreamingEndpoints.StartAsync(config.ResourceGroup, config.AccountName, MyStreamingEndpointName);
// Since we started the endpoint, we should stop it in cleanup.
stopEndpoint = true;
}
string dashPath = await GetDASHStreamingUrlAsync(client, config.ResourceGroup, config.AccountName, locator.Name, streamingEndpoint);
Console.WriteLine("Copy and paste the following URL in your browser to play back the file in the Azure Media Player.");
Console.WriteLine("Note, the player is set to use the AES token and the Bearer token is specified. ");
Console.WriteLine();
Console.WriteLine($"https://ampdemo.azureedge.net/?url={dashPath}&aes=true&aestoken={Authentication.TokenType}%3D{token}");
Console.WriteLine();
}
Console.WriteLine("When finished press enter to cleanup.");
Console.Out.Flush();
Console.ReadLine();
}
catch (ErrorResponseException e)
{
Console.WriteLine("Hit ErrorResponseException");
Console.WriteLine($"\tCode: {e.Body.Error.Code}");
Console.WriteLine($"\tMessage: {e.Body.Error.Message}");
Console.WriteLine();
Console.WriteLine("Exiting, cleanup may be necessary...");
Console.ReadLine();
}
finally
{
Console.WriteLine("Cleaning up...");
await CleanUpAsync(client, config.ResourceGroup, config.AccountName, AdaptiveStreamingTransformName, outputAssetName,
jobName, ContentKeyPolicyName, stopEndpoint, MyStreamingEndpointName);
if (processorClient != null)
{
Console.WriteLine("Job final state received, Stopping the event processor...");
await processorClient.StopProcessingAsync();
Console.WriteLine();
// It is encouraged that you unregister your handlers when you have
// finished using the Event Processor to ensure proper cleanup. This
// is especially important when using lambda expressions or handlers
// in any form that may contain closure scopes or hold other references.
processorClient.ProcessEventAsync -= mediaEventProcessor.ProcessEventsAsync;
processorClient.ProcessErrorAsync -= mediaEventProcessor.ProcessErrorAsync;
}
}
}
