MJPEG Stream w/ .NET Core 2.0

I'm using .NNET Core 2.0 to develop my Web API in C# and I want to forward an MJEPG stream of images with HTTP GET request. I have created the multipart content but when I check the response I can only see the first image and no playing of video is happening.

I have tried to even use an mjpeg external file that I know it works but it does the same thing, it displays the first image frame only.

This is the Controller Get Request:

// GET: api/<controller>
[HttpGet]
public IActionResult Get()
{
   var path = Path.Combine(
                   Directory.GetCurrentDirectory(),"LVUpload", "test.mjpeg");

    var stream = new FileStream(path, FileMode.Open);

    MultipartResult multipartResult = new MultipartResult
    {
        ContentType = "image/jpeg",
        Stream = stream
    };
    return multipartResult;
}

And the multipart implementation:

public class MultipartContent
{
    public string ContentType { get; set; }

    public Stream Stream { get; set; }
}

public class MultipartResult : MultipartContent, IActionResult
{
    private readonly System.Net.Http.MultipartContent content;

    public MultipartResult(string subtype = "x-mixed-replace", string boundary = "canonliveview")
    {
        if (boundary == null)
        {
            this.content = new System.Net.Http.MultipartContent(subtype);
        }
        else
        {
            this.content = new System.Net.Http.MultipartContent(subtype, boundary);
        }
    }

    public async Task ExecuteResultAsync(ActionContext context)
    {
            if (Stream != null)
            {
                var content = new StreamContent(Stream);

                if (ContentType != null)
                {
                    content.Headers.ContentType = new System.Net.Http.Headers.MediaTypeHeaderValue(ContentType);
                }

                this.content.Add(content);
            }

        context.HttpContext.Response.ContentLength = content.Headers.ContentLength;
        context.HttpContext.Response.ContentType = content.Headers.ContentType.ToString();

        await content.CopyToAsync(context.HttpContext.Response.Body);
    }

Can someone help on how can I do this with .Net Core 2.0? I know it's possible with full .Net framework but I have to use latest .Net Core.

I'm not sure if there is a way maybe to encode the stream images to another video type, like x264.