public static async Task Run([ActivityTrigger] DurableActivityContext inputs, ILogger log)
{
log.LogInformation($"Runner Started");
//ToDo - Fix getting info from Event
(string correlationId, string assetId)eventData = inputs.GetInput <(string, string)>();
string jobId = eventData.correlationId;
//Create a Unique working directory
string workingDir = Directory.CreateDirectory(DirectoryPath + jobId).FullName.ToString();
log.LogInformation($"Created directory {workingDir}");
//Create collection for list of png files
List <string> localBlobs = new List <string>();
//Create a unique output name for video summary file
//string outputName = $"summary-{jobId}.mp4";
string outputName = $"summary-{jobId}.jpg";
//Create a blob client to the AMS account and asset container created by the encoding Job
BlobHelper.CreateStorageConnection(AMSStorageConnectionString, $"asset-{eventData.assetId}");
log.LogInformation($"Created Storage Connection");
try
{
//MSI could be used in future when blob AAD access is out of preview
////Get MSI Token from Function Host
//var azureServiceTokenProvider = new AzureServiceTokenProvider();
//string accessToken = await azureServiceTokenProvider.GetAccessTokenAsync(ArmEndpoint);
//ServiceClientCredentials credentials = new TokenCredentials(accessToken);
//Get list of thumnails
localBlobs = await GetThumbnails(workingDir, log);
var trimBlobId = TrimBlobId(localBlobs[0]);
//string summaryArgs = $"-v quiet -r 1/5 -i {trimBlobId}%06d.png -c:v libx264 -vf fps=25 -pix_fmt yuv420p {outputName}";
string summaryArgs = $"-v quiet -i {trimBlobId}%06d.png -filter_complex tile=1x{localBlobs.Count} {outputName}";
var summaryId = FFMpeg.RunFFMpeg(workingDir, ffmpegLocation, summaryArgs, eventData.correlationId, log);
await BlobHelper.UploadSummary(Path.Combine(workingDir, outputName), outputName, log);
}
catch (Exception ex)
{
log.LogError($"Status: Error with Function init: {ex.Message}, CorrelationId: {eventData.correlationId}");
throw;
}
finally
{
Directory.Delete(workingDir, true);
}
}
public static MetaData GetBlob(string blobUri, string correlationId, ILogger log)
{
try
{
string probeArgs = $"-v quiet -show_streams -print_format json \"{blobUri}\"";
var output = FFMpeg.RunFFMpeg(DirectoryPath, ffprobeLocation, probeArgs, correlationId, log);
MetaData result = JsonConvert.DeserializeObject <MetaData>(output);
return(result);
}
catch (Exception ex)
{
log.LogError($"Error extracting metadata from Video for {blobUri}, Exception: {ex.Message}");
throw;
}
}
