Capture webcamera and save into azure blob storage using UWP C# (mediaCapture)

Question

I have UWP C# app which should record video from webcamera.

Once user hits 'Start Record' I should capture video and save into azure blob storage. So for capturing the webcamera I use mediaCapture.

At this moment I can save into local storage using the following code

// Create storage file for the capture
var videoFile = await _captureFolder.CreateFileAsync("SimpleVideo.mp4", CreationCollisionOption.GenerateUniqueName);
var encodingProfile = MediaEncodingProfile.CreateMp4(VideoEncodingQuality.Auto);
// Calculate rotation angle, taking mirroring into account if necessary
var rotationAngle = CameraRotationHelper.ConvertSimpleOrientationToClockwiseDegrees(_rotationHelper.GetCameraCaptureOrientation());
encodingProfile.Video.Properties.Add(RotationKey, PropertyValue.CreateInt32(rotationAngle));

Debug.WriteLine("Starting recording to " + videoFile.Path);

await _mediaCapture.StartRecordToStorageFileAsync(encodingProfile, videoFile);
_isRecording = true;

Debug.WriteLine("Started recording!");

However my goal is to start upload into Azure blob using Azure.Storage.Blobs directly without saving in local machine.

Any advice please?

Answer 1

Blob Storage allows you to upload your file in chunks [spliting file in smaller size] and once you're done you can commit these chunks in a specific order:

Try with these methods,

1. Put Block : Upload a chunk .

2. PutBlockList : Commit a list of chunks in a specific order

With these methods you can for example create a buffer in memory which stores the video and call PutBlock each time the buffer reaches a certain size. Then, once the recording is done you can call PutBlockList to commit all blocks. As a result, your blob will contain the complete recording without saving it to local disk first.

How to use these methods refer this document and SO Thread