public static async Task Run([QueueTrigger("%InputQueue%", Connection = "AzureWebJobsStorage")] VippyProcessingState manifest,
[Blob("%AmsBlobInputContainer%/{BlobName}", FileAccess.ReadWrite)] CloudBlockBlob videoBlobTriggered,
[Blob("%ExistingAmsBlobInputContainer%/{BlobName}", FileAccess.ReadWrite)] CloudBlockBlob videoBlobExisting,
TraceWriter log)
{
//================================================================================
// Function AMSInputQueueHandler
// Purpose:
// This is where the start of the pipeline work begins. It will submit an encoding
// job to Azure Media Services. When that job completes asyncronously, a notification
// webhook will be called by AMS which causes the next stage of the pipeline to
// continue.
//================================================================================
CloudBlockBlob videoBlob = null;
if (manifest.Origin == Enums.OriginEnum.Existing)
{
videoBlob = videoBlobExisting;
}
else if (manifest.Origin == Enums.OriginEnum.Trigger)
{
videoBlob = videoBlobTriggered;
}
if (videoBlob == null)
{
log.Error("There is being an error, videoblog not initialized, not marked as existing or trigger or video is null");
return;
}
var context = MediaServicesHelper.Context;
var cosmosHelper = new CosmosHelper(log);
var toDeleteContainerName = Environment.GetEnvironmentVariable("AmsBlobToDeleteContainer");
// only set the starttime if it wasn't already set in blob watcher function (that way
// it works if the job is iniaited by using this queue directly
if (manifest.StartTime == null)
{
manifest.StartTime = DateTime.Now;
}
var videofileName = videoBlob.Name;
// get a new asset from the blob, and use the file name if video title attribute wasn't passed.
IAsset newAsset;
try
{
newAsset = BlobHelper.CreateAssetFromBlob(videoBlob, videofileName, log)
.GetAwaiter().GetResult();
}
catch (Exception e)
{
throw new ApplicationException($"Error occured creating asset from Blob;/r/n{e.Message}");
}
// If an internal_id was passed in the metadata, use it within AMS (AlternateId) and Cosmos(Id - main document id) for correlation.
// if not, generate a unique id. If the same id is ever reprocessed, all stored metadata
// will be overwritten.
newAsset.AlternateId = manifest.AlternateId;
newAsset.Update();
manifest.AmsAssetId = newAsset.Id;
log.Info($"Deleting the file {videoBlob.Name} from the container ");
//move the video to the to delete folder
await BlobHelper.Move(videoBlob.Container.Name, toDeleteContainerName, videofileName, log);
//move the manifest to the to delete folder
string manifestName = videofileName.Remove(videofileName.IndexOf('.')) + ".json";
log.Info($"Deleting the file {manifestName} from the container ");
await BlobHelper.Move(videoBlob.Container.Name, toDeleteContainerName, manifestName, log);
// copy blob into new asset
// create the encoding job
var job = context.Jobs.Create("MES encode from input container - ABR streaming");
// Get a media processor reference, and pass to it the name of the
// processor to use for the specific task.
var processor = MediaServicesHelper.GetLatestMediaProcessorByName("Media Encoder Standard");
var task = job.Tasks.AddNew("encoding task",
processor,
"Content Adaptive Multiple Bitrate MP4",
TaskOptions.None
);
task.Priority = 100;
task.InputAssets.Add(newAsset);
// setup webhook notification
var keyBytes = new byte[32];
// Check for existing Notification Endpoint with the name "FunctionWebHook"
var existingEndpoint = context.NotificationEndPoints.Where(e => e.Name == "FunctionWebHook").FirstOrDefault();
INotificationEndPoint endpoint;
//if (existingEndpoint != null)
//{
// endpoint = existingEndpoint;
//}
//else
try
{
endpoint = context.NotificationEndPoints.Create("FunctionWebHook",
NotificationEndPointType.WebHook, WebHookEndpoint, keyBytes);
}
catch (Exception)
{
throw new ApplicationException(
$"The endpoing address specified - '{WebHookEndpoint}' is not valid.");
}
task.TaskNotificationSubscriptions.AddNew(NotificationJobState.FinalStatesOnly, endpoint, false);
cosmosHelper.LogMessage($"Add an output asset to contain the results of the job");
// Add an output asset to contain the results of the job.
// This output is specified as AssetCreationOptions.None, which
// means the output asset is not encrypted.
task.OutputAssets.AddNew(videofileName, AssetCreationOptions.None);
// Starts the job in AMS. AMS will notify the webhook when it completes
job.Submit();
cosmosHelper.LogMessage($"Saving on cosmos DB");
// update processing progress with id and metadata payload
await cosmosHelper.StoreProcessingStateRecordInCosmosAsync(manifest);
cosmosHelper.LogMessage($"AMS encoding job submitted for {videofileName}");
}