Retain selectable audio languages and DVB subtitles through live continuity

Tests/ResolutionE2E.cs

@@ -30,7 +30,8 @@ public static class ResolutionE2E
         if (Directory.Exists(output)) throw new Exception("Choose a new output directory"); Directory.CreateDirectory(output);
         using var listener = new TcpListener(IPAddress.Loopback, 0); listener.Start(); var port = ((IPEndPoint)listener.LocalEndpoint).Port; listener.Stop();
         var builder = WebApplication.CreateBuilder(); builder.Logging.ClearProviders(); builder.WebHost.UseUrls($"http://127.0.0.1:{port}");
-        using var manager = new ContinuityStreams(encoder, Path.Combine(output, "cache"), port, new StartupMessages(), NullLogger.Instance, preserveResolution: true);
+        using var logging = LoggerFactory.Create(b => b.AddSimpleConsole().SetMinimumLevel(LogLevel.Warning));
+        using var manager = new ContinuityStreams(encoder, Path.Combine(output, "cache"), port, new StartupMessages(), logging.CreateLogger<ContinuityStreams>(), preserveResolution: true);
         using var relay = new LiveStreamRelay(new System.Net.Http.HttpClient(), port, TimeSpan.FromSeconds(1), TimeSpan.FromSeconds(10), TimeSpan.FromSeconds(5));
         builder.Services.AddSingleton(manager); builder.Services.AddSingleton(relay); builder.Services.AddControllers().AddApplicationPart(typeof(ContinuityController).Assembly);
         await using var app = builder.Build(); app.MapControllers(); app.MapGet("/fixture/{size}.ts", Fixture); await app.StartAsync();
@@ -49,6 +50,7 @@ public static class ResolutionE2E
                 try
                 {
                     await Task.WhenAll(recording.WaitForExitAsync(), packaging.WaitForExitAsync()).WaitAsync(TimeSpan.FromSeconds(65));
+                    Console.WriteLine("Source status: " + JsonSerializer.Serialize(manager.Status()));
                     Require(recording.ExitCode == 0 && packaging.ExitCode == 0, "strict slate/live read and fMP4 packaging: " + size);
                 }
                 finally