Azure Media Services - encoding 4K UHD video with v3 - azure

Question

I made a library that encodes video in Azure using v3 API (.NET Core). I successfully made encoding up to FHD.
But then I tried to encode 4k UHD video (based on How to encode with a custom Transform and H264 Multiple Bitrate 4K articles).
So, here's my code to create this Transform:
private static async Task<Transform> Ensure4kTransformExistsAsync(IAzureMediaServicesClient client,
string resourceGroupName,
string accountName)
{
H264Layer CreateH264Layer(int bitrate, int width, int height)
{
return new H264Layer(
profile: H264VideoProfile.Auto,
level: "auto",
bitrate: bitrate, // Note that the units is in bits per second
maxBitrate: bitrate,
//bufferWindow: TimeSpan.FromSeconds(5), // this is the default
width: width.ToString(),
height: height.ToString(),
bFrames: 3,
referenceFrames: 3,
adaptiveBFrame: true,
frameRate: "0/1"
);
}
// Does a Transform already exist with the desired name? Assume that an existing Transform with the desired name
// also uses the same recipe or Preset for processing content.
Transform transform = await client.Transforms.GetAsync(resourceGroupName, accountName, TRANSFORM_NAME_H264_MULTIPLE_4K_S);
if (transform != null) return transform;
// Create a new Transform Outputs array - this defines the set of outputs for the Transform
TransformOutput[] outputs =
{
// Create a new TransformOutput with a custom Standard Encoder Preset
new TransformOutput(
new StandardEncoderPreset(
codecs: new Codec[]
{
// Add an AAC Audio layer for the audio encoding
new AacAudio(
channels: 2,
samplingRate: 48000,
bitrate: 128000,
profile: AacAudioProfile.AacLc
),
// Next, add a H264Video for the video encoding
new H264Video(
// Set the GOP interval to 2 seconds for both H264Layers
keyFrameInterval: TimeSpan.FromSeconds(2),
// Add H264Layers
layers: new[]
{
CreateH264Layer(20000000, 4096, 2304),
CreateH264Layer(18000000, 3840, 2160),
CreateH264Layer(16000000, 3840, 2160),
CreateH264Layer(14000000, 3840, 2160),
CreateH264Layer(12000000, 2560, 1440),
CreateH264Layer(10000000, 2560, 1440),
CreateH264Layer(8000000, 2560, 1440),
CreateH264Layer(6000000, 1920, 1080),
CreateH264Layer(4700000, 1920, 1080),
CreateH264Layer(3400000, 1280, 720),
CreateH264Layer(2250000, 960, 540),
CreateH264Layer(1000000, 640, 360)
}
),
// Also generate a set of PNG thumbnails
new PngImage(
start: "25%",
step: "25%",
range: "80%",
layers: new[]
{
new PngLayer(
"50%",
"50%"
)
}
)
},
// Specify the format for the output files - one for video+audio, and another for the thumbnails
formats: new Format[]
{
// Mux the H.264 video and AAC audio into MP4 files, using basename, label, bitrate and extension macros
// Note that since you have multiple H264Layers defined above, you have to use a macro that produces unique names per H264Layer
// Either {Label} or {Bitrate} should suffice
new Mp4Format(
"Video-{Basename}-{Label}-{Bitrate}{Extension}"
),
new PngFormat(
"Thumbnail-{Basename}-{Index}{Extension}"
)
}
),
OnErrorType.StopProcessingJob,
Priority.Normal
)
};
const string DESCRIPTION = "Multiple 4k";
// Create the custom Transform with the outputs defined above
transform = await client.Transforms.CreateOrUpdateAsync(resourceGroupName, accountName, TRANSFORM_NAME_H264_MULTIPLE_4K_S,
outputs,
DESCRIPTION);
return transform;
}
But the job ends up with the following error:
Job ended with error: Fatal service error, please contact support.
An error has occurred. Stage: ProcessSubtaskRequest. Code: System.Net.WebException.
And I did use S3 Media Reserved Unit for encoding. So, is there any way to make it work?

Answer 1

Posting back the solutions to this thread for completeness
There was a bug in the sample code (RunAsync() method), which resulted in Jobs using an incorrect output Asset. The bug has now been fixed.
There was a related bug in error handling that is being addressed