我正在使用 Windows Azure 媒体服务来上传视频文件、编码，然后发布它们。我使用 Windows Azure 媒体服务示例代码对文件进行编码，我发现当我使用该代码将“.mp4”文件转换为 Apple HLS 时，它在 iOS 设备中无法正常运行。只播放音频，看不到视频。然而，如果我使用 Windows Azure 媒体服务门户在 HLS 中编码和发布文件，它们在 iOS 设备上工作得非常好（音频和视频播放）！
几天来我一直在努力解决这个问题，真的很感激有人可以指导我进行编码过程（通过代码）吗？
这是我到现在为止的！
static IAsset CreateEncodingJob(IAsset asset)
{
// Declare a new job.
IJob job = _context.Jobs.Create("My encoding job");
// Get a media processor reference, and pass to it the name of the
// processor to use for the specific task.
IMediaProcessor processor = GetLatestMediaProcessorByName("Windows Azure Media Encoder");
// Create a task with the encoding details, using a string preset.
ITask task = job.Tasks.AddNew("My encoding task",
processor,
"H264 Broadband SD 4x3",
TaskOptions.ProtectedConfiguration);
// Specify the input asset to be encoded.
task.InputAssets.Add(asset);
// Add an output asset to contain the results of the job.
// This output is specified as AssetCreationOptions.None, which
// means the output asset is in the clear (unencrypted).
task.OutputAssets.AddNew("Output MP4 asset",
true,
AssetCreationOptions.None);
// Launch the job.
job.Submit();
// Checks job progress and prints to the console.
CheckJobProgress(job.Id);
// Get an updated job reference, after waiting for the job
// on the thread in the CheckJobProgress method.
job = GetJob(job.Id);
// Get a reference to the output asset from the job.
IAsset outputAsset = job.OutputMediaAssets[0];
return outputAsset;
}
static IAsset CreateMp4ToSmoothJob(IAsset asset)
{
// Read the encryption configuration data into a string.
string configuration = File.ReadAllText(Path.GetFullPath(_configFilePath + @"\MediaPackager_MP4ToSmooth.xml"));
//Publish the asset.
//GetStreamingOriginLocatorformp4(asset.Id);
// Declare a new job.
IJob job = _context.Jobs.Create("My MP4 to Smooth job");
// Get a media processor reference, and pass to it the name of the
// processor to use for the specific task.
IMediaProcessor processor = GetLatestMediaProcessorByName("Windows Azure Media Packager");
// Create a task with the encoding details, using a configuration file. Specify
// the use of protected configuration, which encrypts sensitive config data.
ITask task = job.Tasks.AddNew("My Mp4 to Smooth Task",
processor,
configuration,
TaskOptions.ProtectedConfiguration);
// Specify the input asset to be encoded.
task.InputAssets.Add(asset);
// Add an output asset to contain the results of the job.
task.OutputAssets.AddNew("Output Smooth asset",
true,
AssetCreationOptions.None);
// Launch the job.
job.Submit();
// Checks job progress and prints to the console.
CheckJobProgress(job.Id);
job = GetJob(job.Id);
IAsset outputAsset = job.OutputMediaAssets[0];
// Optionally download the output to the local machine.
//DownloadAssetToLocal(job.Id, _outputIsmFolder);
return outputAsset;
}
// Shows how to encode from smooth streaming to Apple HLS format.
static IAsset CreateSmoothToHlsJob(IAsset outputSmoothAsset)
{
// Read the encryption configuration data into a string.
string configuration = File.ReadAllText(Path.GetFullPath(_configFilePath + @"\MediaPackager_SmoothToHLS.xml"));
//var getismfile = from p in outputSmoothAsset.Files
// where p.Name.EndsWith(".ism")
// select p;
//IAssetFile manifestFile = getismfile.First();
//manifestFile.IsPrimary = true;
var ismAssetFiles = outputSmoothAsset.AssetFiles.ToList().Where(f => f.Name.EndsWith(".ism", StringComparison.OrdinalIgnoreCase)).ToArray();
if (ismAssetFiles.Count() != 1)
throw new ArgumentException("The asset should have only one, .ism file");
ismAssetFiles.First().IsPrimary = true;
ismAssetFiles.First().Update();
//Use the smooth asset as input asset
IAsset asset = outputSmoothAsset;
// Declare a new job.
IJob job = _context.Jobs.Create("My Smooth Streams to Apple HLS job");
// Get a media processor reference, and pass to it the name of the
// processor to use for the specific task.
IMediaProcessor processor = GetMediaProcessor("Smooth Streams to HLS Task");
// Create a task with the encoding details, using a configuration file.
ITask task = job.Tasks.AddNew("My Smooth to HLS Task", processor, configuration, TaskOptions.ProtectedConfiguration);
// Specify the input asset to be encoded.
task.InputAssets.Add(asset);
// Add an output asset to contain the results of the job.
task.OutputAssets.AddNew("Output HLS asset", true, AssetCreationOptions.None);
// Launch the job.
job.Submit();
// Checks job progress and prints to the console.
CheckJobProgress(job.Id);
// Optionally download the output to the local machine.
//DownloadAssetToLocal(job.Id, outputFolder);
job = GetJob(job.Id);
IAsset outputAsset = job.OutputMediaAssets[0];
return outputAsset;
}