Return Embedded Thumbnail from Video.cs

using System.Net.Mime;
using Xabe.FFmpeg;

var builder = WebApplication.CreateBuilder(args);
var app = builder.Build();

FFmpeg.SetExecutablesPath(@"C:\Temp\Tools\ffmpeg\bin");

app.MapGet("/thumbnail/{filename}", async (string filename, HttpContext context) => {
    var i = await FFmpeg.GetMediaInfo($@"C:\Temp\files\{filename}");

    var ii = i.Streams.Where(i => i.Codec.EndsWith("jpg") || i.Codec.EndsWith("jpeg")).First();

    List<byte> data = new();

    var conversion = FFmpeg.Conversions.New()
        .AddStream(ii)
        .PipeOutput(PipeDescriptor.stdout)
        .SetOutputFormat(Format.mjpeg);

    conversion.OnVideoDataReceived += async (_, args) => await context.Response.BodyWriter.WriteAsync(args.Data);

    await conversion.Start();

    return Results.Ok();
}).Produces(StatusCodes.Status200OK, contentType: MediaTypeNames.Image.Jpeg);

app.Run();