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我需要实现一个能够在 Azure 媒体服务上上传 .mp4 视频的应用程序。视频应该以ProgressiveDownload流格式发布，并且应该在静态时加密。

研究媒体服务文档，我尝试实现一个控制台应用程序。

static void Main(string[] args)
    {
        try
        {
            var tokenCredentials = new AzureAdTokenCredentials(_AADTenantDomain, AzureEnvironments.AzureCloudEnvironment);
            var tokenProvider = new AzureAdTokenProvider(tokenCredentials);

            _context = new CloudMediaContext(new Uri(_RESTAPIEndpoint), tokenProvider);

            // Add calls to methods defined in this section.
            // Make sure to update the file name and path to where you have your media file.
            IAsset inputAsset =
            UploadFile(_videoPath, AssetCreationOptions.StorageEncrypted);

            IAsset encodedAsset =
            EncodeToAdaptiveBitrateMP4s(inputAsset, AssetCreationOptions.StorageEncrypted);

            PublishAssetGetURLs(encodedAsset);
        }
        catch (Exception exception)
        {
            // Parse the XML error message in the Media Services response and create a new
            // exception with its content.
            exception = MediaServicesExceptionParser.Parse(exception);

            Console.Error.WriteLine(exception.Message);
        }
        finally
        {
            Console.ReadLine();
        }
    }       

    static public IAsset EncodeToAdaptiveBitrateMP4s(IAsset asset, AssetCreationOptions options)
    {

        // Prepare a job with a single task to transcode the specified asset
        // into a multi-bitrate asset.

        IJob job = _context.Jobs.CreateWithSingleTask(
            "Media Encoder Standard",
            "Adaptive Streaming",
            asset,
            "Adaptive Bitrate MP4",
            options);

        Console.WriteLine("Submitting transcoding job...");


        // Submit the job and wait until it is completed.
        job.Submit();

        job = job.StartExecutionProgressTask(
            j =>
            {
                Console.WriteLine("Job state: {0}", j.State);
                Console.WriteLine("Job progress: {0:0.##}%", j.GetOverallProgress());
            },
            CancellationToken.None).Result;

        Console.WriteLine("Transcoding job finished.");

        IAsset outputAsset = job.OutputMediaAssets[0];

        return outputAsset;
    }

    static public void PublishAssetGetURLs(IAsset asset)
    {
        // Publish the output asset by creating an Origin locator for adaptive streaming,
        // and a SAS locator for progressive download.

        IAssetDeliveryPolicy policy =
            _context.AssetDeliveryPolicies.Create("Clear Policy",
            AssetDeliveryPolicyType.NoDynamicEncryption,
            AssetDeliveryProtocol.ProgressiveDownload | AssetDeliveryProtocol.HLS | AssetDeliveryProtocol.SmoothStreaming | AssetDeliveryProtocol.Dash, 
            null);

        asset.DeliveryPolicies.Add(policy);

        _context.Locators.Create(
            LocatorType.OnDemandOrigin,
            asset,
            AccessPermissions.Read,
            TimeSpan.FromDays(30));

        _context.Locators.Create(
            LocatorType.Sas,
            asset,
            AccessPermissions.Read,
            TimeSpan.FromDays(30));


        IEnumerable<IAssetFile> mp4AssetFiles = asset
                .AssetFiles
                .ToList()
                .Where(af => af.Name.EndsWith(".mp4", StringComparison.OrdinalIgnoreCase));

        // Get the Smooth Streaming, HLS and MPEG-DASH URLs for adaptive streaming,
        // and the Progressive Download URL.
        Uri smoothStreamingUri = asset.GetSmoothStreamingUri();
        Uri hlsUri = asset.GetHlsUri();
        Uri mpegDashUri = asset.GetMpegDashUri();

        // Get the URls for progressive download for each MP4 file that was generated as a result
        // of encoding.
        List<Uri> mp4ProgressiveDownloadUris = mp4AssetFiles.Select(af => af.GetSasUri()).ToList();                       
    }

当我添加部分以管理静态加密时，此代码停止工作。更准确地说，当我：

  • 替换UploadFile(_videoPath, AssetCreationOptions.None);为UploadFile(_videoPath, AssetCreationOptions.StorageEncrypted);
  • 替换EncodeToAdaptiveBitrateMP4s(inputAsset, AssetCreationOptions.None);为EncodeToAdaptiveBitrateMP4s(inputAsset, AssetCreationOptions.StorageEncrypted);

  • PublishAssetGetURLs在方法中添加了以下代码

    IAssetDeliveryPolicy 策略 = _context.AssetDeliveryPolicies.Create("清除策略", AssetDeliveryPolicyType.NoDynamicEncryption, AssetDeliveryProtocol.ProgressiveDownload | AssetDeliveryProtocol.HLS | AssetDeliveryProtocol.SmoothStreaming | AssetDeliveryProtocol.Dash, null);

        asset.DeliveryPolicies.Add(policy);

问题是视频已正确上传，但是当我尝试在 Azure 门户内播放视频时，我得到一个通用的 0x0 错误。

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1 回答 1

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于 2018-01-20T21:40:55.553 回答