From 9a056b3070727f9c17d8330a1308d6356354cde3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Micha=C5=82=20Kacprzak?= <michal@e-kacprzak.eu>
Date: Fri, 23 Oct 2026 23:05:57 +0200
Subject: [PATCH] Preserve channel resolution through continuity slates up to
 UHD

---
 .../Configuration/PluginConfiguration.cs      |   1 +
 .../Configuration/configPage.html             |   2 +-
 Jellyfin.Plugin.Enigma2/ContinuityStreams.cs  |  23 ++--
 Jellyfin.Plugin.Enigma2/ContinuityTimeline.cs |   2 +-
 .../Jellyfin.Plugin.Enigma2.csproj            |   4 +-
 README.md                                     |   9 ++
 Tests/ContinuityE2E.cs                        |   6 +-
 Tests/NativeResolutionPolicyTests.cs          |  41 +++++++
 Tests/Program.cs                              |   3 +
 Tests/ResolutionE2E.cs                        | 102 ++++++++++++++++++
 build.yaml                                    |   2 +-
 deploy-plugin-only.py                         |   2 +-
 experiments/run-continuity-e2e.py             |   5 +-
 experiments/verify-continuity-recording.py    |   4 +-
 14 files changed, 182 insertions(+), 24 deletions(-)
 create mode 100644 Tests/NativeResolutionPolicyTests.cs
 create mode 100644 Tests/ResolutionE2E.cs

diff --git a/Jellyfin.Plugin.Enigma2/Configuration/PluginConfiguration.cs b/Jellyfin.Plugin.Enigma2/Configuration/PluginConfiguration.cs
index 23dd312..dbe0e52 100644
--- a/Jellyfin.Plugin.Enigma2/Configuration/PluginConfiguration.cs
+++ b/Jellyfin.Plugin.Enigma2/Configuration/PluginConfiguration.cs
@@ -33,6 +33,7 @@ namespace Jellyfin.Plugin.Enigma2.Configuration
         public bool EnableAutomaticChannelSync { get; set; } = true;
         public bool ShowNativeStartupMessages { get; set; } = true;
         public bool EnableContinuitySlates { get; set; } = false;
+        public bool PreserveSourceResolution { get; set; } = true;
 
 
         public PluginConfiguration()
diff --git a/Jellyfin.Plugin.Enigma2/Configuration/configPage.html b/Jellyfin.Plugin.Enigma2/Configuration/configPage.html
index 7637a68..41c6d03 100644
--- a/Jellyfin.Plugin.Enigma2/Configuration/configPage.html
+++ b/Jellyfin.Plugin.Enigma2/Configuration/configPage.html
@@ -157,7 +157,7 @@
                         <input is="emby-checkbox" type="checkbox" id="chkEnableContinuitySlates" />
                         <span>Podtrzymuj stream planszą FFmpeg podczas oczekiwania i przerw</span>
                     </label>
-                    <div class="fieldDescription">Ponawia odbiór aż do zatrzymania przez widza. Jeden proces odbioru na kanał; język planszy według interfejsu użytkownika, następnie profilu i ustawień Jellyfina. Normalizuje obraz do H264 Full HD 50 kl./s i dźwięk do AAC stereo; wymaga dodatkowego CPU, nie zachowuje 4K, HDR, dźwięku przestrzennego ani dodatkowych ścieżek. Nie dotyczy nagrań.</div>
+                    <div class="fieldDescription">Ponawia odbiór aż do zatrzymania przez widza. Jeden proces odbioru na kanał; język planszy według interfejsu użytkownika, następnie profilu i ustawień Jellyfina. Zachowuje rozdzielczość obrazu źródła, również 4K, przy kodowaniu H264 50 kl./s i AAC stereo. Wymaga CPU; nie zachowuje HDR, dźwięku przestrzennego ani dodatkowych ścieżek. Nie dotyczy nagrań.</div>
                     <label class="checkboxContainer">
                         <input is="emby-checkbox" type="checkbox" id="chkShowNativeStartupMessages" />
                         <span>Pokazuj komunikaty uruchamiania kanału w Android TV</span>
diff --git a/Jellyfin.Plugin.Enigma2/ContinuityStreams.cs b/Jellyfin.Plugin.Enigma2/ContinuityStreams.cs
index 0999c1b..3243f72 100644
--- a/Jellyfin.Plugin.Enigma2/ContinuityStreams.cs
+++ b/Jellyfin.Plugin.Enigma2/ContinuityStreams.cs
@@ -27,6 +27,7 @@ public sealed class ContinuityStreams : IDisposable
     private readonly string root;
     private Func<string> encoderPath;
     private readonly int port;
+    private readonly bool preserveResolution;
     private readonly StartupMessages messages;
     private readonly ILogger logger;
     private readonly object gate = new();
@@ -40,11 +41,11 @@ public sealed class ContinuityStreams : IDisposable
     private long attempts, liveSegments;
     public const int Width = 1920, Height = 1080, FrameRate = 50;
     public ContinuityStreams(IMediaEncoder encoder, IApplicationPaths paths, IServerApplicationHost host, StartupMessages messages, ILogger<ContinuityStreams> logger)
-        : this(encoder.EncoderPath, Path.Combine(paths.CachePath, "enigma2-continuity-v1"), host.HttpPort, messages, logger) { encoderPath = () => encoder.EncoderPath; }
+        : this(encoder.EncoderPath, Path.Combine(paths.CachePath, "enigma2-continuity-v1"), host.HttpPort, messages, logger, Plugin.Instance?.Configuration?.PreserveSourceResolution ?? true) { encoderPath = () => encoder.EncoderPath; }
     // Explicit inputs support an isolated FFmpeg/Kestrel test without a receiver or server configuration changes.
-    public ContinuityStreams(string encoder, string root, int port, StartupMessages messages, ILogger logger)
+    public ContinuityStreams(string encoder, string root, int port, StartupMessages messages, ILogger logger, bool preserveResolution = true)
     {
-        encoderPath = () => encoder; this.root = Path.GetFullPath(root); this.port = port; this.messages = messages; this.logger = logger;
+        this.preserveResolution = preserveResolution; encoderPath = () => encoder; this.root = Path.GetFullPath(root); this.port = port; this.messages = messages; this.logger = logger;
         Directory.CreateDirectory(this.root); sweeper = Task.Run(Sweep);
     }
     private sealed class Viewer
@@ -76,8 +77,8 @@ public sealed class ContinuityStreams : IDisposable
             Protocol = MediaProtocol.Http, Container = "hls", IsInfiniteStream = true, SupportsProbing = false,
             SupportsDirectPlay = false, SupportsDirectStream = true, SupportsTranscoding = true, BufferMs = 1000,
             MediaStreams = new[] {
-                new MediaStream { Type = MediaStreamType.Video, Index = -1, Codec = "h264", Profile = "Constrained Baseline", Level = 42,
-                    Width = Width, Height = Height, AverageFrameRate = FrameRate, RealFrameRate = FrameRate, IsInterlaced = false, BitRate = 12000000, PixelFormat = "yuv420p" },
+                new MediaStream { Type = MediaStreamType.Video, Index = -1, Codec = "h264", Profile = "Constrained Baseline", Level = preserveResolution ? null : 42,
+                    Width = preserveResolution ? null : Width, Height = preserveResolution ? null : Height, AverageFrameRate = FrameRate, RealFrameRate = FrameRate, IsInterlaced = false, BitRate = preserveResolution ? null : 12000000, PixelFormat = "yuv420p" },
                 new MediaStream { Type = MediaStreamType.Audio, Index = -1, Codec = "aac", Channels = 2, SampleRate = 48000, BitRate = 128000, IsDefault = true }
             }
         };
@@ -149,9 +150,9 @@ public sealed class ContinuityStreams : IDisposable
             foreach (var source in sources.Values) source.Stop(); sources.Clear(); viewers.Clear();
         }
     }
-    private static IEnumerable<string> CodecArguments() => new[] {
+    private IEnumerable<string> CodecArguments(bool slate = false) => new[] {
         "-c:v", "libx264", "-threads", "2", "-preset", "ultrafast", "-tune", "zerolatency", "-crf", "20",
-        "-maxrate", "12M", "-bufsize", "24M", "-profile:v", "baseline", "-level:v", "4.2", "-pix_fmt", "yuv420p",
+        "-maxrate", preserveResolution && !slate ? "48M" : "12M", "-bufsize", preserveResolution && !slate ? "96M" : "24M", "-profile:v", "baseline", "-pix_fmt", "yuv420p",
         "-r", FrameRate.ToString(CultureInfo.InvariantCulture), "-g", "112", "-keyint_min", "112", "-sc_threshold", "0",
         "-c:a", "aac", "-ar", "48000", "-ac", "2", "-b:a", "128k" };
     private Process Start(IEnumerable<string> arguments, string folder)
@@ -179,7 +180,7 @@ public sealed class ContinuityStreams : IDisposable
                 var filter = $"drawbox=x=(iw-160)/2:y=260:w=160:h=100:color=0x58bfee:t=6,drawtext=fontfile={font}:text=TV:fontsize=42:fontcolor=0x58bfee:x=(w-tw)/2:y=285," +
                     $"drawtext=fontfile={font}:textfile=message.txt:fontsize=42:fontcolor=white:line_spacing=22:x=(w-tw)/2:y=490";
                 using var process = Start(new[] { "-f", "lavfi", "-i", $"color=c=0x101723:s={Width}x{Height}:r={FrameRate}", "-f", "lavfi", "-i", "anullsrc=r=48000:cl=stereo", "-vf", filter,
-                    "-map", "0:v:0", "-map", "1:a:0", "-t", "6.72" }.Concat(CodecArguments()).Concat(new[] { "-f", "hls", "-hls_time", "2.24", "-hls_list_size", "0", "-hls_segment_filename", "slate-%d.ts", "slate.m3u8" }), folder);
+                    "-map", "0:v:0", "-map", "1:a:0", "-t", "6.72" }.Concat(CodecArguments(slate: true)).Concat(new[] { "-f", "hls", "-hls_time", "2.24", "-hls_list_size", "0", "-hls_segment_filename", "slate-%d.ts", "slate.m3u8" }), folder);
                 try { await process.WaitForExitAsync(lifetime.Token).WaitAsync(TimeSpan.FromSeconds(20), lifetime.Token); }
                 finally { if (!process.HasExited) process.Kill(entireProcessTree: true); }
                 if (process.ExitCode != 0) throw new IOException("FFmpeg slate generation failed");
@@ -217,8 +218,8 @@ public sealed class ContinuityStreams : IDisposable
                         Directory.CreateDirectory(folder);
                         var args = new[] { "-rw_timeout", "10000000", "-analyzeduration", "5000000", "-probesize", "4000000", "-i", Url,
                             "-map", "0:v:0", "-map", "0:a:0", "-sn", "-dn", "-vf",
-                            $"bwdif=mode=send_field:parity=auto:deint=interlaced,scale=w={Width}:h={Height}:force_original_aspect_ratio=decrease,pad={Width}:{Height}:(ow-iw)/2:(oh-ih)/2,setsar=1" }
-                            .Concat(CodecArguments()).Concat(new[] { "-f", "hls", "-hls_time", "2.24", "-hls_list_size", "6", "-hls_delete_threshold", "8", "-hls_flags", "delete_segments+temp_file+omit_endlist", "-hls_segment_filename", "segment-%09d.ts", "live.m3u8" });
+                            owner.preserveResolution ? "bwdif=mode=send_field:parity=auto:deint=interlaced" : $"bwdif=mode=send_field:parity=auto:deint=interlaced,scale=w={Width}:h={Height}:force_original_aspect_ratio=decrease,pad={Width}:{Height}:(ow-iw)/2:(oh-ih)/2,setsar=1" }
+                            .Concat(owner.CodecArguments()).Concat(new[] { "-f", "hls", "-hls_time", "2.24", "-hls_list_size", "6", "-hls_delete_threshold", "8", "-hls_flags", "delete_segments+temp_file+omit_endlist", "-hls_segment_filename", "segment-%09d.ts", "live.m3u8" });
                         Interlocked.Increment(ref owner.attempts);
                         using var process = owner.Start(args, folder);
                         try
@@ -237,7 +238,7 @@ public sealed class ContinuityStreams : IDisposable
                                         var match = Regex.Match(line, @"^segment-(\d{9})\.ts$");
                                         if (!match.Success || !int.TryParse(match.Groups[1].Value, out var index) || index <= highest) continue;
                                         var path = Path.Combine(folder, line);
-                                        if (!File.Exists(path) || new FileInfo(path).Length > 8 * 1024 * 1024) continue;
+                                        if (!File.Exists(path) || new FileInfo(path).Length > 32 * 1024 * 1024) continue;
                                         Timeline.Live(await File.ReadAllBytesAsync(path, lifetime.Token), epoch, duration, DateTime.UtcNow);
                                         highest = index; lastOutput = DateTime.UtcNow; delivered = true; Retrying = false; failures = 0; Interlocked.Increment(ref owner.liveSegments);
                                     }
diff --git a/Jellyfin.Plugin.Enigma2/ContinuityTimeline.cs b/Jellyfin.Plugin.Enigma2/ContinuityTimeline.cs
index 0df0602..ac7376b 100644
--- a/Jellyfin.Plugin.Enigma2/ContinuityTimeline.cs
+++ b/Jellyfin.Plugin.Enigma2/ContinuityTimeline.cs
@@ -30,7 +30,7 @@ public sealed class ContinuityTimeline
     }
     public void Live(byte[] video, string epoch, double duration, DateTime now)
     {
-        if (video == null || video.Length == 0 || video.Length > 8 * 1024 * 1024 || duration <= 0 || duration > 5) throw new ArgumentException("Invalid live segment");
+        if (video == null || video.Length == 0 || video.Length > 32 * 1024 * 1024 || duration <= 0 || duration > 5) throw new ArgumentException("Invalid live segment");
         lock (gate) { lastLive = now; Add(video, null, epoch, duration, now); }
     }
     public void Tick(DateTime now, bool retrying)
diff --git a/Jellyfin.Plugin.Enigma2/Jellyfin.Plugin.Enigma2.csproj b/Jellyfin.Plugin.Enigma2/Jellyfin.Plugin.Enigma2.csproj
index 44e4db5..870a332 100644
--- a/Jellyfin.Plugin.Enigma2/Jellyfin.Plugin.Enigma2.csproj
+++ b/Jellyfin.Plugin.Enigma2/Jellyfin.Plugin.Enigma2.csproj
@@ -2,8 +2,8 @@
 
   <PropertyGroup>
     <TargetFrameworks>net10.0</TargetFrameworks>
-    <AssemblyVersion>7.0.12.0</AssemblyVersion>
-    <FileVersion>7.0.12.0</FileVersion>
+    <AssemblyVersion>7.0.13.0</AssemblyVersion>
+    <FileVersion>7.0.13.0</FileVersion>
   </PropertyGroup>
 
   <PropertyGroup Condition="'$(Configuration)|$(TargetFramework)|$(Platform)'=='Release|net6.0|AnyCPU'">
diff --git a/README.md b/README.md
index e5acf08..d28c145 100644
--- a/README.md
+++ b/README.md
@@ -109,3 +109,12 @@ Moduł web pokazuje stan do pierwszej odtworzonej klatki, umożliwia anulowanie
 **Koszt i zakres:** tryb jest domyślnie wyłączony w nowych konfiguracjach. Włączenie normalizuje kanał do H264 1920×1080 50 kl./s, CRF20 z maksimum 12 Mb/s, AAC 48 kHz stereo. Nie zachowuje 4K, HDR, wielokanałowego audio, dodatkowych ścieżek ani napisów. Wymaga programowego kodowania; pomiary dotyczą konkretnego testu. Wyłączenie przywraca dotychczasowy odbiór. Nie zmienia konfiguracji Jellyfina, wrapperów, profili dekodera ani OSCam.
 
 Weryfikacja: `Tests` obejmuje izolację użytkowników/urządzeń, uprawnienia, migrację kanałów i wcześniejsze mechanizmy streamu, katalog języków, zegar TS i ograniczoną pamięć przy symulowanej sześciogodzinnej awarii. `test-web-bridge.cjs` sprawdza web bez kont produkcyjnych. `experiments/run-continuity-e2e.py` uruchamia izolowany harness z prawdziwym FFmpeg, dwoma językami i sterowanym źródłem syntetycznym; opcja `--long` utrzymuje awarię 75 s, sprawdza odzyskanie obrazu, rygorystyczny odczyt AV i wszystkie 12 plansz. Nie jest to test fizycznego Android TV ani produkcyjnej sesji Jellyfina. Należy jawnie odróżnić przygotowany kandydat od wersji aktywnej na serwerze.
+
+
+### 7.0.13 — zachowanie rozdzielczości źródła
+
+Na żądanie użytkownika usunięto sztywny limit Full HD z domyślnego trybu plansz. `PreserveSourceResolution` domyślnie wynosi true: filtr producenta nie skaluje ani nie zmienia SAR kanału. Rozdzielczość początkowej planszy nie jest już wpisywana jako rozmiar źródła do natywnej negocjacji Jellyfina. Profile urządzeń mogą nadal ograniczać wyjście zgodnie z możliwościami klienta i jego ustawieniami jakości. Nie ustawiono sztywnego limitu szerokości/wysokości producenta; maksymalny segment zwiększono do 32 MiB, a limit przepływności kodera do 48 Mb/s. Kodek i dźwięk pozostają H264 8-bit, 50 kl./s i AAC stereo — ta zmiana nie dodaje zachowania HDR, oryginalnego kodeka, ścieżek audio ani napisów.
+
+Izolowana próba z rzeczywistym FFmpeg potwierdziła przejścia plansza → 720×576, 1280×720, 1920×1080, 2560×1440 i 3840×2160. Odczytano rzeczywiste wymiary zdekodowanych klatek zarówno z MPEG-TS, jak i HLS fMP4, a dla SD również SAR16:15. To test syntetyczny o małej zmienności obrazu, nie dowód wydajności każdego kanału UHD ani test fizycznej aplikacji. Dodatkowa próba z zachowaniem 720p potwierdziła 75 sekund awarii, właściwe języki plansz i odzyskanie obrazu bez ponownego otwierania klienta. Testy wykorzystują również natywny StreamBuilder Jellyfina12.2 do sprawdzenia limitów urządzeń od SD do UHD.
+
+7.0.13 jest kandydatem do odrębnego zatwierdzenia; nie nadpisuje automatycznie wdrożonej7.0.11. Wcześniejsza zgoda dotyczyła tylko nocnego Jellytel. Nie aktywować starego kandydata7.0.12 ograniczonego do Full HD.
diff --git a/Tests/ContinuityE2E.cs b/Tests/ContinuityE2E.cs
index 2fbec6a..0653219 100644
--- a/Tests/ContinuityE2E.cs
+++ b/Tests/ContinuityE2E.cs
@@ -21,13 +21,13 @@ public static class ContinuityE2E
     private static string ffmpeg;
     private static volatile bool enabled;
     private static int connections, active, maximum;
-    public static async Task Run(string encoder, string output, bool longTest = false)
+    public static async Task Run(string encoder, string output, bool longTest = false, bool preserveResolution = false)
     {
         ffmpeg = encoder; output = Path.GetFullPath(output);
         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 streams = new ContinuityStreams(encoder, Path.Combine(output, "cache"), port, new StartupMessages(), NullLogger.Instance);
+        using var streams = new ContinuityStreams(encoder, Path.Combine(output, "cache"), port, new StartupMessages(), NullLogger.Instance, preserveResolution: preserveResolution);
         using var relay = new LiveStreamRelay(new System.Net.Http.HttpClient(), port, TimeSpan.FromSeconds(1), TimeSpan.FromSeconds(10), TimeSpan.FromSeconds(5));
         builder.Services.AddSingleton(relay); builder.Services.AddSingleton(streams); builder.Services.AddControllers().AddApplicationPart(typeof(ContinuityController).Assembly);
         await using var app = builder.Build(); app.MapControllers(); app.MapGet("/fixture.ts", Fixture); await app.StartAsync();
@@ -81,7 +81,7 @@ public static class ContinuityE2E
                 }
             var report = new { Passed = true, SyntheticOnly = true, ReceiverConnectionsOpened = 0, ViewerLanguages = new[] { "pl", "en" }, SourceConnections = connections, FailureSeconds = longTest ? 75 : 15,
                 MaximumConcurrentSourceConnections = maximum, RemainingConnections = active, WaitingLossRecoverySamePlayer = true,
-                StrictVideoAudioDecode = true, Width = ContinuityStreams.Width, Height = ContinuityStreams.Height, FrameRate = ContinuityStreams.FrameRate,
+                StrictVideoAudioDecode = true, PreserveSourceResolution = preserveResolution, Width = preserveResolution ? 1280 : ContinuityStreams.Width, Height = preserveResolution ? 720 : ContinuityStreams.Height, FrameRate = ContinuityStreams.FrameRate,
                 PhysicalAndroidTvTested = false, ActualJellyfinPlayerTested = false };
             await File.WriteAllTextAsync(Path.Combine(output, "result.json"), JsonSerializer.Serialize(report, new JsonSerializerOptions { WriteIndented = true })); Console.WriteLine(JsonSerializer.Serialize(report));
         }
diff --git a/Tests/NativeResolutionPolicyTests.cs b/Tests/NativeResolutionPolicyTests.cs
new file mode 100644
index 0000000..d1ca7f9
--- /dev/null
+++ b/Tests/NativeResolutionPolicyTests.cs
@@ -0,0 +1,41 @@
+using System;
+using System.Reflection;
+using Jellyfin.Data.Enums;
+using MediaBrowser.Model.Dlna;
+using MediaBrowser.Model.Dto;
+using MediaBrowser.Model.Entities;
+using MediaBrowser.Model.MediaInfo;
+using Microsoft.Extensions.Logging.Abstractions;
+
+public static class NativeResolutionPolicyTests
+{
+    public static void Run(Action<bool, string> check)
+    {
+        // Exercise the installed Jellyfin 12.2 negotiation code, including
+        // devices whose width/height conditions are optional rather than required.
+        foreach (var (width, height) in new[] { (720, 576), (1280, 720), (1920, 1080), (2560, 1440), (3840, 2160) })
+            foreach (var required in new[] { true, false })
+            {
+                var source = new MediaSourceInfo { Id = "test", Path = "http://127.0.0.1/test.m3u8", Protocol = MediaProtocol.Http,
+                    Container = "hls", SupportsDirectPlay = false, SupportsDirectStream = true, SupportsProbing = false,
+                    MediaStreams = new[] { new MediaStream { Type = MediaStreamType.Video, Index = -1, Codec = "h264", AverageFrameRate = 50, Profile = "Constrained Baseline" },
+                        new MediaStream { Type = MediaStreamType.Audio, Index = -1, Codec = "aac", Channels = 2, SampleRate = 48000, IsDefault = true } } };
+                var profile = new DeviceProfile { Name = "Resolution contract", MaxStreamingBitrate = 100000000,
+                    DirectPlayProfiles = new[] { new DirectPlayProfile { Container = "hls,ts", Type = DlnaProfileType.Video, VideoCodec = "h264", AudioCodec = "aac" } },
+                    TranscodingProfiles = new[] { new TranscodingProfile { Container = "ts", Type = DlnaProfileType.Video, VideoCodec = "h264", AudioCodec = "aac", Protocol = MediaStreamProtocol.hls, Context = EncodingContext.Streaming } },
+                    CodecProfiles = new[] { new CodecProfile { Codec = "h264", Type = CodecType.Video, Conditions = new[] {
+                        new ProfileCondition { Property = ProfileConditionValue.Width, Condition = ProfileConditionType.LessThanEqual, Value = width.ToString(), IsRequired = required },
+                        new ProfileCondition { Property = ProfileConditionValue.Height, Condition = ProfileConditionType.LessThanEqual, Value = height.ToString(), IsRequired = required } } } } };
+                var support = DispatchProxy.Create<ITranscoderSupport, ResolutionTranscoder>();
+                var stream = new StreamBuilder(support, NullLogger.Instance).GetOptimalVideoStream(new MediaOptions {
+                    ItemId = Guid.NewGuid(), DeviceId = "test", Profile = profile, MediaSources = new[] { source }, EnableDirectPlay = true,
+                    EnableDirectStream = true, AllowVideoStreamCopy = true, AllowAudioStreamCopy = true, MaxBitrate = 100000000, Context = EncodingContext.Streaming });
+                check(stream.MaxWidth == width && stream.MaxHeight == height && source.MediaStreams[0].Width == null,
+                    $"native Jellyfin negotiates {width}x{height} without a plugin Full HD cap; required={required}");
+            }
+    }
+}
+public class ResolutionTranscoder : DispatchProxy
+{
+    protected override object Invoke(MethodInfo method, object[] args) => method.ReturnType == typeof(bool) ? true : method.ReturnType == typeof(int) ? 2 : null;
+}
diff --git a/Tests/Program.cs b/Tests/Program.cs
index fca3118..a66755b 100644
--- a/Tests/Program.cs
+++ b/Tests/Program.cs
@@ -18,6 +18,8 @@ using Microsoft.AspNetCore.Builder;
 using Microsoft.AspNetCore.Http;
 using Microsoft.AspNetCore.Mvc;
 using Microsoft.Extensions.DependencyInjection;
+if (args.Length == 3 && args[0] == "--native-continuity-e2e") { await ContinuityE2E.Run(args[1], args[2], true, true); return; }
+if (args.Length == 3 && args[0] == "--resolution-e2e") { await ResolutionE2E.Run(args[1], args[2]); return; }
 if (args.Length == 3 && (args[0] == "--continuity-e2e" || args[0] == "--long-continuity-e2e")) { await ContinuityE2E.Run(args[1], args[2], args[0].StartsWith("--long")); return; }
 var time=DateTime.UtcNow;
 void Check(bool ok,string name){if(!ok)throw new Exception(name);Console.WriteLine("PASS "+name);}
@@ -129,6 +131,7 @@ await SavedChannelPlaybackTests.Run(Check);
 await ChannelSyncTests.Run(Check);
 await PlaybackFeedbackTests.Run(Check);
 ContinuityTests.Run(Check);
+NativeResolutionPolicyTests.Run(Check);
 public class PathsProxy : DispatchProxy
 {
  public string Folder;
diff --git a/Tests/ResolutionE2E.cs b/Tests/ResolutionE2E.cs
new file mode 100644
index 0000000..0dc4f73
--- /dev/null
+++ b/Tests/ResolutionE2E.cs
@@ -0,0 +1,102 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.IO;
+using System.Linq;
+using System.Net;
+using System.Net.Sockets;
+using System.Text.Json;
+using System.Threading;
+using System.Threading.Tasks;
+using Jellyfin.Plugin.Enigma2;
+using Microsoft.AspNetCore.Builder;
+using Microsoft.AspNetCore.Hosting;
+using Microsoft.AspNetCore.Http;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Logging;
+using Microsoft.Extensions.Logging.Abstractions;
+
+/// <summary>Native source dimensions through slate/live switches, remux and fMP4 packaging.</summary>
+public static class ResolutionE2E
+{
+    private static string encoder, output;
+    private static int active, maximum;
+    private static readonly Dictionary<string, string> Sizes = new() {
+        ["sd"] = "720x576", ["hd"] = "1280x720", ["fhd"] = "1920x1080", ["qhd"] = "2560x1440", ["uhd"] = "3840x2160"
+    };
+    public static async Task Run(string executable, string folder)
+    {
+        encoder = executable; output = Path.GetFullPath(folder);
+        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 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();
+        var reports = new List<object>();
+        try
+        {
+            foreach (var (name, size) in Sizes)
+            {
+                var media = await manager.Open(relay.Register($"http://127.0.0.1:{port}/fixture/{name}.ts"), "en", CancellationToken.None);
+                Require(media.MediaStreams[0].Width == null && media.MediaStreams[0].Height == null && media.MediaStreams[0].Level == null,
+                    "source metadata does not falsely cap the channel at Full HD: " + name);
+                var target = Path.Combine(output, name); Directory.CreateDirectory(target);
+                var common = new[] { "-xerror", "-i", media.Path, "-t", "32", "-map", "0:v:0", "-map", "0:a:0", "-c", "copy" };
+                using var recording = Start(common.Concat(new[] { Path.Combine(target, "recording.ts") }), name + "-recording");
+                using var packaging = Start(common.Concat(new[] { "-bsf:a", "aac_adtstoasc", "-f", "hls", "-hls_segment_type", "fmp4", "-hls_time", "2", "-hls_list_size", "0", Path.Combine(target, "index.m3u8") }), name + "-fmp4");
+                try
+                {
+                    await Task.WhenAll(recording.WaitForExitAsync(), packaging.WaitForExitAsync()).WaitAsync(TimeSpan.FromSeconds(65));
+                    Require(recording.ExitCode == 0 && packaging.ExitCode == 0, "strict slate/live read and fMP4 packaging: " + size);
+                }
+                finally
+                {
+                    if (!recording.HasExited) recording.Kill(true); if (!packaging.HasExited) packaging.Kill(true); manager.Close(media.Id);
+                }
+                foreach (var file in new[] { "recording.ts", "index.m3u8" })
+                {
+                    using var decode = Start(new[] { "-xerror", "-i", Path.Combine(target, file), "-map", "0:v:0", "-map", "0:a:0", "-f", "null", "-" }, name + "-decode-" + Path.GetExtension(file).TrimStart('.'));
+                    await decode.WaitForExitAsync().WaitAsync(TimeSpan.FromSeconds(60)); Require(decode.ExitCode == 0, "decode mixed-resolution " + file + ": " + size);
+                    var probePath = Path.Combine(Path.GetDirectoryName(encoder), "ffprobe");
+                    var info = new ProcessStartInfo(probePath) { UseShellExecute = false, RedirectStandardOutput = true, RedirectStandardError = true };
+                    foreach (var arg in new[] { "-v", "error", "-threads", "1", "-select_streams", "v:0", "-show_entries", "frame=width,height,sample_aspect_ratio", "-of", "csv=p=0", Path.Combine(target, file) }) info.ArgumentList.Add(arg);
+                    using var probe = Process.Start(info); var text = await probe.StandardOutput.ReadToEndAsync(); var error = await probe.StandardError.ReadToEndAsync(); await probe.WaitForExitAsync().WaitAsync(TimeSpan.FromSeconds(60));
+                    Require(probe.ExitCode == 0 && string.IsNullOrWhiteSpace(error), "probe actual decoded dimensions: " + name + " " + file);
+                    var dimensions = text.Split('\n').Where(line => line.Length > 0).Select(line => line.Trim()).Distinct().ToArray();
+                    var expected = size.Replace('x', ',') + ",";
+                    Require(dimensions.Any(line => line.StartsWith(expected, StringComparison.Ordinal)), "native dimensions reach the decoded client frames: " + size);
+                    if (name == "sd") Require(dimensions.Any(line => line.StartsWith(expected + "16:15", StringComparison.Ordinal)), "SD sample aspect ratio survives slate/live switching");
+                    reports.Add(new { Profile = name, File = file, Dimensions = dimensions });
+                }
+                await Task.Delay(1500);
+            }
+            Require(active == 0 && maximum == 1, "resolution trials keep one upstream and release the last source");
+            var report = new { Passed = true, SyntheticOnly = true, LowMotionFixture = true, ReceiverConnectionsOpened = 0, PhysicalAndroidTvTested = false,
+                ActualJellyfinPlayerTested = false, MaximumConcurrentSourceConnections = maximum, Reports = reports };
+            await File.WriteAllTextAsync(Path.Combine(output, "result.json"), JsonSerializer.Serialize(report, new JsonSerializerOptions { WriteIndented = true })); Console.WriteLine(JsonSerializer.Serialize(report));
+        }
+        finally { manager.Dispose(); await app.StopAsync(); }
+    }
+    private static Process Start(IEnumerable<string> arguments, string name)
+    {
+        var info = new ProcessStartInfo(encoder) { UseShellExecute = false, RedirectStandardError = true, RedirectStandardOutput = true };
+        foreach (var arg in new[] { "-hide_banner", "-loglevel", "warning", "-nostdin", "-threads", "1", "-filter_threads", "1" }.Concat(arguments)) info.ArgumentList.Add(arg);
+        var process = Process.Start(info); process.ErrorDataReceived += (_, e) => { if (e.Data != null) lock (typeof(ResolutionE2E)) File.AppendAllText(Path.Combine(output, name + ".log"), e.Data + "\n"); }; process.BeginErrorReadLine(); return process;
+    }
+    private static void Require(bool condition, string text) { if (!condition) throw new Exception(text); Console.WriteLine("PASS " + text); }
+    private static async Task Fixture(HttpContext context)
+    {
+        var name = context.Request.RouteValues["size"]?.ToString(); if (name == null || !Sizes.TryGetValue(name, out var size)) { context.Response.StatusCode = 404; return; }
+        maximum = Math.Max(maximum, Interlocked.Increment(ref active));
+        var filter = "color=c=0x085f21:s=" + size + ":r=25" + (name == "sd" ? ",setsar=16/15" : "");
+        var info = new ProcessStartInfo(encoder) { UseShellExecute = false, RedirectStandardError = true, RedirectStandardOutput = true };
+        foreach (var arg in new[] { "-hide_banner", "-loglevel", "error", "-nostdin", "-threads", "1", "-filter_threads", "1", "-re", "-f", "lavfi", "-i", filter,
+            "-f", "lavfi", "-i", "sine=frequency=440:sample_rate=48000", "-c:v", "libx264", "-threads", "1", "-preset", "ultrafast", "-g", "25", "-c:a", "aac", "-f", "mpegts", "pipe:1" }) info.ArgumentList.Add(arg);
+        using var process = Process.Start(info); process.ErrorDataReceived += (_, _) => { }; process.BeginErrorReadLine(); context.Response.ContentType = "video/mp2t";
+        try { await process.StandardOutput.BaseStream.CopyToAsync(context.Response.Body, context.RequestAborted); }
+        catch (OperationCanceledException) { } catch (IOException) { }
+        finally { if (!process.HasExited) process.Kill(true); await process.WaitForExitAsync(); Interlocked.Decrement(ref active); }
+    }
+}
diff --git a/build.yaml b/build.yaml
index 522fd4a..5f5cdd1 100644
--- a/build.yaml
+++ b/build.yaml
@@ -8,7 +8,7 @@ guid: "193f29f9-ea6c-4595-a6f6-55e79d7c590a"
 # The version of the plugin, starting at 1. Note that the AssemblyVersion
 # and FileVersion flags in the `.csproj` file must have two additional
 # fiels, e.g. 1.0.0 to be built correctly.
-version: "7.0.12.0" # Please increment with each pull request
+version: "7.0.13.0" # Please increment with each pull request
 
 # The supported Jellyfin version, usually the earliest binary-compatible
 # version. Based on the Jellyfin components from NuGet.
diff --git a/deploy-plugin-only.py b/deploy-plugin-only.py
index 288e261..b873cbe 100644
--- a/deploy-plugin-only.py
+++ b/deploy-plugin-only.py
@@ -13,7 +13,7 @@ import urllib.error
 import urllib.request
 import uuid
 
-VERSION = '7.0.12.0'
+VERSION = '7.0.13.0'
 ABI = '12.2.0.0'
 GUID = '193f29f9-ea6c-4595-a6f6-55e79d7c590a'
 DLL = 'Jellyfin.Plugin.Enigma2.dll'
diff --git a/experiments/run-continuity-e2e.py b/experiments/run-continuity-e2e.py
index c63cbf9..6e27191 100644
--- a/experiments/run-continuity-e2e.py
+++ b/experiments/run-continuity-e2e.py
@@ -17,13 +17,14 @@ def main():
     parser.add_argument('--ffmpeg', default='/usr/lib/jellyfin-ffmpeg/ffmpeg')
     parser.add_argument('--output', required=True)
     parser.add_argument('--long', action='store_true')
+    parser.add_argument('--native', action='store_true')
     args = parser.parse_args()
     root = Path(args.output).resolve()
     if root.exists():
         raise ValueError('Choose a new output directory')
     samples, previous = [], {}
     with Path(str(root) + '.log').open('x') as log:
-        process = subprocess.Popen([args.harness, '--long-continuity-e2e' if args.long else '--continuity-e2e', args.ffmpeg, str(root)], stdout=log,
+        process = subprocess.Popen([args.harness, '--native-continuity-e2e' if args.native else '--long-continuity-e2e' if args.long else '--continuity-e2e', args.ffmpeg, str(root)], stdout=log,
                                    stderr=subprocess.STDOUT, start_new_session=True)
         deadline = time.monotonic() + 240
         try:
@@ -58,7 +59,7 @@ def main():
     report = {'harness_exit_code': process.returncode, 'samples': samples,
               'scope': 'Only synthetic plugin source encoding; excludes fixture and player decoders'}
     (root / 'cpu-sample.json').write_text(json.dumps(report, indent=2))
-    if process.returncode == 0 and args.long:
+    if process.returncode == 0 and (args.long or args.native):
         subprocess.run(['python3', str(Path(__file__).with_name('verify-continuity-recording.py')), '--output', str(root), '--ffmpeg', args.ffmpeg], check=True)
     print(Path(str(root) + '.log').read_text()[-3500:])
     print(json.dumps({'exit_code': process.returncode, 'cpu_samples': len(samples),
diff --git a/experiments/verify-continuity-recording.py b/experiments/verify-continuity-recording.py
index 44c8f73..30ee741 100644
--- a/experiments/verify-continuity-recording.py
+++ b/experiments/verify-continuity-recording.py
@@ -12,7 +12,7 @@ import subprocess
 def pixels(ffmpeg, path, second=0):
     command = [ffmpeg, '-hide_banner', '-loglevel', 'error', '-nostdin', '-threads', '1', '-filter_threads', '1',
                '-ss', str(second), '-i', str(path), '-frames:v', '1', '-vf',
-               'crop=1920:260:0:430,scale=640:86:flags=area', '-pix_fmt', 'gray', '-f', 'rawvideo', 'pipe:1']
+               'scale=1920:1080:force_original_aspect_ratio=decrease,pad=1920:1080:(ow-iw)/2:(oh-ih)/2,crop=1920:260:0:430,scale=640:86:flags=area', '-pix_fmt', 'gray', '-f', 'rawvideo', 'pipe:1']
     output = subprocess.run(command, capture_output=True, check=True, timeout=20).stdout
     if len(output) != 640 * 86:
         raise RuntimeError('Incomplete video frame')
@@ -33,7 +33,7 @@ def verify(root, ffmpeg):
         retrying = pixels(ffmpeg, root / (language + '-retrying-slate.ts'))
         observed_waiting = pixels(ffmpeg, root / (language + '.mkv'), 1)
         observed_retrying = pixels(ffmpeg, root / (language + '.mkv'), 70)
-        live = pixels(ffmpeg, root / (language + '.mkv'), 39)
+        live = max((pixels(ffmpeg, root / (language + '.mkv'), at) for at in (18,22,26,30,34,38,42,46)), key=lambda frame: difference(retrying,frame))
         recovered = pixels(ffmpeg, root / (language + '.mkv'), 140)
         metrics = {'waiting_error': difference(waiting, observed_waiting),
                    'retrying_error': difference(retrying, observed_retrying),