feat: convert text subtitles using next engine (#2869)

* feat: convert text subtitles using next engine

* update dependencies

ErsatzTV.Application/Channels/ChannelViewModel.cs

@@ -22,6 +22,7 @@ public record ChannelViewModel(
     int? MirrorSourceChannelId,
     TimeSpan? PlayoutOffset,
     StreamingEngine StreamingEngine,
+    NextEngineTextSubtitleMode NextEngineTextSubtitleMode,
     StreamingMode StreamingMode,
     int? WatermarkId,
     int? FallbackFillerId,

ErsatzTV.Application/Channels/Commands/CreateChannel.cs

@@ -21,6 +21,7 @@ public record CreateChannel(
     int? MirrorSourceChannelId,
     TimeSpan? PlayoutOffset,
     StreamingEngine StreamingEngine,
+    NextEngineTextSubtitleMode NextEngineTextSubtitleMode,
     StreamingMode StreamingMode,
     int? WatermarkId,
     int? FallbackFillerId,

ErsatzTV.Application/Channels/Commands/CreateChannelHandler.cs

@@ -86,6 +86,7 @@ public class CreateChannelHandler(
                 MirrorSourceChannelId = request.MirrorSourceChannelId,
                 PlayoutOffset = request.PlayoutOffset,
                 StreamingEngine = request.StreamingEngine,
+                NextEngineTextSubtitleMode = request.NextEngineTextSubtitleMode,
                 StreamingMode = request.StreamingMode,
                 Artwork = artwork,
                 StreamSelectorMode = request.StreamSelectorMode,

ErsatzTV.Application/Channels/Commands/UpdateChannel.cs

@@ -22,6 +22,7 @@ public record UpdateChannel(
     int? MirrorSourceChannelId,
     TimeSpan? PlayoutOffset,
     StreamingEngine StreamingEngine,
+    NextEngineTextSubtitleMode NextEngineTextSubtitleMode,
     StreamingMode StreamingMode,
     int? WatermarkId,
     int? FallbackFillerId,

ErsatzTV.Application/Channels/Commands/UpdateChannelHandler.cs

@@ -133,6 +133,7 @@ public class UpdateChannelHandler(
         c.MirrorSourceChannelId = update.MirrorSourceChannelId;
         c.PlayoutOffset = update.PlayoutOffset;
         c.StreamingEngine = update.StreamingEngine;
+        c.NextEngineTextSubtitleMode = update.NextEngineTextSubtitleMode;
         c.StreamingMode = update.StreamingMode;
         c.WatermarkId = update.WatermarkId;
         c.FallbackFillerId = update.FallbackFillerId;

ErsatzTV.Application/Channels/Mapper.cs

@@ -25,6 +25,7 @@ internal static class Mapper
             channel.MirrorSourceChannelId,
             channel.PlayoutOffset,
             channel.StreamingEngine,
+            channel.NextEngineTextSubtitleMode,
             channel.StreamingMode,
             channel.WatermarkId,
             channel.FallbackFillerId,

ErsatzTV.Application/ErsatzTV.Application.csproj

@@ -14,8 +14,8 @@
         <PackageReference Include="CliWrap" Version="3.10.1" />
         <PackageReference Include="Humanizer.Core" Version="3.0.10" />
         <PackageReference Include="MediatR" Version="[12.5.0]" />
-        <PackageReference Include="Microsoft.Extensions.Caching.Abstractions" Version="10.0.6" />
-        <PackageReference Include="Microsoft.Extensions.Hosting.Abstractions" Version="10.0.6" />
+        <PackageReference Include="Microsoft.Extensions.Caching.Abstractions" Version="10.0.7" />
+        <PackageReference Include="Microsoft.Extensions.Hosting.Abstractions" Version="10.0.7" />
         <PackageReference Include="Newtonsoft.Json" Version="13.0.4" />
         <PackageReference Include="Serilog.Formatting.Compact.Reader" Version="4.0.0" />
         <PackageReference Include="WebMarkupMin.Core" Version="2.21.0" />

ErsatzTV.Application/Playouts/Commands/SyncNextPlayoutHandler.cs

@@ -17,6 +17,7 @@ using ErsatzTV.Infrastructure.Data;
 using ErsatzTV.Infrastructure.Extensions;
 using Microsoft.EntityFrameworkCore;
 using Microsoft.Extensions.Logging;
+using PlayoutItem = ErsatzTV.Core.Domain.PlayoutItem;
 
 namespace ErsatzTV.Application.Playouts;
 
@@ -320,11 +321,27 @@ public partial class SyncNextPlayoutHandler(
 
         foreach (Subtitle subtitle in maybeSubtitle)
         {
-            if (nextPlayoutItem.Tracks?.Subtitle?.StreamIndex is null)
+            if (subtitle.SubtitleKind is SubtitleKind.Embedded)
             {
-                nextPlayoutItem.Tracks ??= new Core.Next.PlayoutItemTracks();
-                nextPlayoutItem.Tracks.Subtitle ??= new Core.Next.TrackSelection();
-                nextPlayoutItem.Tracks.Subtitle.StreamIndex = subtitle.StreamIndex;
+                if (nextPlayoutItem.Tracks?.Subtitle?.StreamIndex is null)
+                {
+                    nextPlayoutItem.Tracks ??= new Core.Next.PlayoutItemTracks();
+                    nextPlayoutItem.Tracks.Subtitle ??= new Core.Next.TrackSelection();
+                    nextPlayoutItem.Tracks.Subtitle.StreamIndex = subtitle.StreamIndex;
+                }
+            }
+            else if (!subtitle.Path.StartsWith("http", StringComparison.OrdinalIgnoreCase))
+            {
+                if (nextPlayoutItem.Tracks?.Subtitle?.Source is null)
+                {
+                    nextPlayoutItem.Tracks ??= new Core.Next.PlayoutItemTracks();
+                    nextPlayoutItem.Tracks.Subtitle ??= new Core.Next.TrackSelection();
+                    nextPlayoutItem.Tracks.Subtitle.Source = new Core.Next.Source
+                    {
+                        SourceType = Core.Next.SourceType.Local,
+                        Path = subtitle.Path,
+                    };
+                }
             }
         }
     }
@@ -484,8 +501,8 @@ public partial class SyncNextPlayoutHandler(
             //allSubtitles.RemoveAll(s => s.Codec == "eia_608");
         }
 
-        // TODO: support text subtitles; external image subtitles
-        allSubtitles.RemoveAll(s => !s.IsImage || s.SubtitleKind is not SubtitleKind.Embedded);
+        // TODO: external image subtitles
+        allSubtitles.RemoveAll(s => s.IsImage && s.SubtitleKind is not SubtitleKind.Embedded);
 
         return allSubtitles;
     }

ErsatzTV.Application/Streaming/Commands/StartFFmpegNextSessionHandler.cs

@@ -1,6 +1,5 @@
 using System.Globalization;
 using System.IO.Abstractions;
-using System.Reflection;
 using System.Runtime.InteropServices;
 using System.Threading.Channels;
 using ErsatzTV.Application.Channels;
@@ -18,6 +17,7 @@ using ErsatzTV.Core.Next.Config;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Hosting;
 using Microsoft.Extensions.Logging;
+using Subtitle = ErsatzTV.Core.Next.Config.Subtitle;
 
 namespace ErsatzTV.Application.Streaming;
 
@@ -67,7 +67,7 @@ public class StartFFmpegNextSessionHandler(
         await mediator.Send(new RefreshGraphicsElements(), cancellationToken);
 
         ChannelConfig config = await MapConfig(
-            request.ChannelNumber,
+            validationResult.Channel,
             validationResult.FfmpegProfile,
             cancellationToken);
 
@@ -230,6 +230,9 @@ public class StartFFmpegNextSessionHandler(
         var variantPlaylist =
             $"{request.Scheme}://{request.Host}{request.PathBase}/iptv/session/{request.ChannelNumber}/live.m3u8{request.AccessTokenQuery}";
 
+        var subtitlePlaylist =
+            $"{request.Scheme}://{request.Host}{request.PathBase}/iptv/session/{request.ChannelNumber}/live_sub.m3u8{request.AccessTokenQuery}";
+
         Option<ChannelStreamingSpecsViewModel> maybeStreamingSpecs =
             await mediator.Send(new GetChannelStreamingSpecs(request.ChannelNumber));
         string resolution = string.Empty;
@@ -268,13 +271,14 @@ public class StartFFmpegNextSessionHandler(
         }
 
         return $@"#EXTM3U
-#EXT-X-VERSION:3
+#EXT-X-VERSION:6
+#EXT-X-MEDIA:TYPE=SUBTITLES,GROUP-ID=""subs"",NAME=""English"",DEFAULT=YES,AUTOSELECT=YES,FORCED=NO,LANGUAGE=""en"",URI=""{subtitlePlaylist}""
 #EXT-X-STREAM-INF:BANDWIDTH={bitrate}{resolution}
 {variantPlaylist}";
     }
 
     private async Task<ChannelConfig> MapConfig(
-        string channelNumber,
+        ChannelViewModel channel,
         FFmpegProfileViewModel ffmpegProfile,
         CancellationToken cancellationToken)
     {
@@ -355,7 +359,16 @@ public class StartFFmpegNextSessionHandler(
             }
         };
 
-        string playoutFolder = fileSystem.Path.Combine(FileSystemLayout.NextPlayoutsFolder, channelNumber, "current");
+        var subtitleNormalization = new Subtitle
+        {
+            Mode = channel.NextEngineTextSubtitleMode switch
+            {
+                NextEngineTextSubtitleMode.Convert => Mode.Convert,
+                _ => Mode.Burn
+            }
+        };
+
+        string playoutFolder = fileSystem.Path.Combine(FileSystemLayout.NextPlayoutsFolder, channel.Number, "current");
 
         return new ChannelConfig
         {
@@ -367,7 +380,8 @@ public class StartFFmpegNextSessionHandler(
             Normalization = new Normalization
             {
                 Audio = audioNormalization,
-                Video = videoNormalization
+                Video = videoNormalization,
+                Subtitle = subtitleNormalization
             }
         };
     }

ErsatzTV.Core.Tests/ErsatzTV.Core.Tests.csproj

@@ -9,12 +9,12 @@
     <ItemGroup>
         <PackageReference Include="CliWrap" Version="3.10.1" />
         <PackageReference Include="LanguageExt.Core" Version="4.4.9" />
-        <PackageReference Include="Microsoft.Extensions.Caching.Memory" Version="10.0.6" />
-        <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="10.0.6" />
-        <PackageReference Include="Microsoft.Extensions.Logging" Version="10.0.6" />
-        <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="10.0.6" />
-        <PackageReference Include="Microsoft.Extensions.Logging.Debug" Version="10.0.6" />
-        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.4.0" />
+        <PackageReference Include="Microsoft.Extensions.Caching.Memory" Version="10.0.7" />
+        <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="10.0.7" />
+        <PackageReference Include="Microsoft.Extensions.Logging" Version="10.0.7" />
+        <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="10.0.7" />
+        <PackageReference Include="Microsoft.Extensions.Logging.Debug" Version="10.0.7" />
+        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.5.1" />
         <PackageReference Include="NSubstitute" Version="5.3.0" />
         <PackageReference Include="NUnit" Version="4.5.1" />
         <PackageReference Include="NUnit3TestAdapter" Version="6.2.0" />

ErsatzTV.Core/Domain/Channel.cs

@@ -23,6 +23,7 @@ public class Channel
     public int? FallbackFillerId { get; set; }
     public FillerPreset FallbackFiller { get; set; }
     public StreamingEngine StreamingEngine { get; set; }
+    public NextEngineTextSubtitleMode NextEngineTextSubtitleMode { get; set; }
     public StreamingMode StreamingMode { get; set; }
     public List<Playout> Playouts { get; set; }
     public List<Artwork> Artwork { get; set; }

ErsatzTV.Core/Domain/NextEngineSubtitleMode.cs

@@ -0,0 +1,7 @@
+namespace ErsatzTV.Core.Domain;
+
+public enum NextEngineTextSubtitleMode
+{
+    Burn = 0,
+    Convert = 1,
+}

ErsatzTV.Core/ErsatzTV.Core.csproj

@@ -16,10 +16,10 @@
         <PackageReference Include="LanguageExt.Core" Version="4.4.9" />
         <PackageReference Include="LanguageExt.Transformers" Version="4.4.8" />
         <PackageReference Include="MediatR" Version="[12.5.0]" />
-        <PackageReference Include="Microsoft.Extensions.Caching.Abstractions" Version="10.0.6" />
-        <PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="10.0.6" />
-        <PackageReference Include="Microsoft.Extensions.Http" Version="10.0.6" />
-        <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="10.0.6" />
+        <PackageReference Include="Microsoft.Extensions.Caching.Abstractions" Version="10.0.7" />
+        <PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="10.0.7" />
+        <PackageReference Include="Microsoft.Extensions.Http" Version="10.0.7" />
+        <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="10.0.7" />
         <PackageReference Include="Microsoft.IO.RecyclableMemoryStream" Version="3.0.1" />
         <PackageReference Include="NCalcSync" Version="5.12.0" />
         <PackageReference Include="Newtonsoft.Json" Version="13.0.4" />
@@ -27,10 +27,10 @@
         <PackageReference Include="Serilog.Sinks.Console" Version="6.1.1" />
         <PackageReference Include="SkiaSharp" Version="3.119.2" />
         <PackageReference Include="SkiaSharp.NativeAssets.Linux.NoDependencies" Version="3.119.2" />
-        <PackageReference Include="System.CommandLine" Version="2.0.6" />
+        <PackageReference Include="System.CommandLine" Version="2.0.7" />
         <PackageReference Include="Testably.Abstractions" Version="10.2.0" />
         <PackageReference Include="TimeSpanParserUtil" Version="1.2.0" />
-        <PackageReference Include="YamlDotNet" Version="17.0.1" />
+        <PackageReference Include="YamlDotNet" Version="17.1.0" />
     </ItemGroup>
 
     <ItemGroup>

ErsatzTV.Core/FFmpeg/FFmpegStreamSelector.cs

@@ -107,7 +107,8 @@ public class FFmpegStreamSelector : IFFmpegStreamSelector
                         channel,
                         allLanguageCodes,
                         version.MediaItem.Id,
-                        version.MediaVersion);
+                        version.MediaVersion,
+                        shouldLogMessages);
                     sw.Stop();
                     if (shouldLogMessages)
                     {
@@ -126,7 +127,8 @@ public class FFmpegStreamSelector : IFFmpegStreamSelector
                         channel,
                         allLanguageCodes,
                         version.MediaItem.Id,
-                        version.MediaVersion);
+                        version.MediaVersion,
+                        shouldLogMessages);
                     sw2.Stop();
                     if (shouldLogMessages)
                     {
@@ -144,10 +146,13 @@ public class FFmpegStreamSelector : IFFmpegStreamSelector
         }
         catch (Exception ex)
         {
-            _logger.LogError(ex, "Failed to execute audio stream selector script; falling back to built-in logic");
+            if (shouldLogMessages)
+            {
+                _logger.LogError(ex, "Failed to execute audio stream selector script; falling back to built-in logic");
+            }
         }
 
-        return DefaultSelectAudioStream(version.MediaVersion, allLanguageCodes, preferredAudioTitle);
+        return DefaultSelectAudioStream(version.MediaVersion, allLanguageCodes, preferredAudioTitle, shouldLogMessages);
     }
 
     public async Task<Option<Subtitle>> SelectSubtitleStream(
@@ -176,47 +181,52 @@ public class FFmpegStreamSelector : IFFmpegStreamSelector
 
         var candidateSubtitles = subtitles.ToList();
 
-        bool useEmbeddedSubtitles = await _configElementRepository
-            .GetValue<bool>(ConfigElementKey.FFmpegUseEmbeddedSubtitles, cancellationToken)
-            .IfNoneAsync(true);
-
-        if (!useEmbeddedSubtitles)
+        // next engine doesn't need to specifically enable or pre-extract embedded subtitles
+        if (channel.StreamingEngine != StreamingEngine.Next)
         {
-            if (shouldLogMessages)
+            bool useEmbeddedSubtitles = await _configElementRepository
+                .GetValue<bool>(ConfigElementKey.FFmpegUseEmbeddedSubtitles, cancellationToken)
+                .IfNoneAsync(true);
+
+            if (!useEmbeddedSubtitles)
             {
-                _logger.LogDebug("Ignoring embedded subtitles for channel {Number}", channel.Number);
-            }
+                if (shouldLogMessages)
+                {
+                    _logger.LogDebug("Ignoring embedded subtitles for channel {Number}", channel.Number);
+                }
 
-            candidateSubtitles = candidateSubtitles.Filter(s => s.SubtitleKind is not SubtitleKind.Embedded).ToList();
-        }
+                candidateSubtitles =
+                    candidateSubtitles.Filter(s => s.SubtitleKind is not SubtitleKind.Embedded).ToList();
+            }
 
-        if (channel.StreamingMode is not StreamingMode.HttpLiveStreamingDirect)
-        {
-            foreach (Subtitle subtitle in candidateSubtitles
-                       .Filter(s => s.SubtitleKind is SubtitleKind.Embedded && !s.IsImage)
-                       .ToList())
+            if (channel.StreamingMode is not StreamingMode.HttpLiveStreamingDirect)
             {
-                if (!subtitle.IsExtracted)
+                foreach (Subtitle subtitle in candidateSubtitles
+                             .Filter(s => s.SubtitleKind is SubtitleKind.Embedded && !s.IsImage)
+                             .ToList())
                 {
-                    if (shouldLogMessages)
+                    if (!subtitle.IsExtracted)
                     {
-                        _logger.LogDebug(
-                            "Ignoring embedded subtitle with index {Index} that has not been extracted",
-                            subtitle.StreamIndex);
+                        if (shouldLogMessages)
+                        {
+                            _logger.LogDebug(
+                                "Ignoring embedded subtitle with index {Index} that has not been extracted",
+                                subtitle.StreamIndex);
+                        }
+
+                        candidateSubtitles.Remove(subtitle);
                     }
-
-                    candidateSubtitles.Remove(subtitle);
-                }
-                else if (string.IsNullOrWhiteSpace(subtitle.Path))
-                {
-                    if (shouldLogMessages)
+                    else if (string.IsNullOrWhiteSpace(subtitle.Path))
                     {
-                        _logger.LogDebug(
-                            "BUG: ignoring embedded subtitle with index {Index} that is missing a path",
-                            subtitle.StreamIndex);
+                        if (shouldLogMessages)
+                        {
+                            _logger.LogDebug(
+                                "BUG: ignoring embedded subtitle with index {Index} that is missing a path",
+                                subtitle.StreamIndex);
+                        }
+
+                        candidateSubtitles.Remove(subtitle);
                     }
-
-                    candidateSubtitles.Remove(subtitle);
                 }
             }
         }
@@ -294,7 +304,8 @@ public class FFmpegStreamSelector : IFFmpegStreamSelector
     private Option<MediaStream> DefaultSelectAudioStream(
         MediaVersion version,
         IReadOnlyCollection<string> preferredLanguageCodes,
-        string preferredAudioTitle)
+        string preferredAudioTitle,
+        bool shouldLogMessages)
     {
         var audioStreams = version.Streams.Filter(s => s.MediaStreamKind == MediaStreamKind.Audio).ToList();
 
@@ -304,26 +315,32 @@ public class FFmpegStreamSelector : IFFmpegStreamSelector
 
         if (correctLanguage.Count != 0)
         {
-            _logger.LogDebug(
-                "Found {Count} audio streams with preferred audio language code(s) {Code}",
-                correctLanguage.Count,
-                preferredLanguageCodes);
+            if (shouldLogMessages)
+            {
+                _logger.LogDebug(
+                    "Found {Count} audio streams with preferred audio language code(s) {Code}",
+                    correctLanguage.Count,
+                    preferredLanguageCodes);
+            }
 
-            return PrioritizeAudioTitle(correctLanguage, preferredAudioTitle ?? string.Empty);
+            return PrioritizeAudioTitle(correctLanguage, preferredAudioTitle ?? string.Empty, shouldLogMessages);
         }
 
-        _logger.LogDebug(
-            "Unable to find audio stream with preferred audio language code(s) {Code}",
-            preferredLanguageCodes);
+        if (shouldLogMessages)
+        {
+            _logger.LogDebug(
+                "Unable to find audio stream with preferred audio language code(s) {Code}",
+                preferredLanguageCodes);
+        }
 
-        return PrioritizeAudioTitle(audioStreams, preferredAudioTitle ?? string.Empty);
+        return PrioritizeAudioTitle(audioStreams, preferredAudioTitle ?? string.Empty, shouldLogMessages);
     }
 
-    private Option<MediaStream> PrioritizeAudioTitle(IReadOnlyCollection<MediaStream> streams, string title)
+    private Option<MediaStream> PrioritizeAudioTitle(IReadOnlyCollection<MediaStream> streams, string title, bool shouldLogMessages)
     {
         if (string.IsNullOrWhiteSpace(title))
         {
-            return PrioritizeDefault(streams);
+            return PrioritizeDefault(streams, shouldLogMessages);
         }
 
         // prioritize matching titles
@@ -332,30 +349,43 @@ public class FFmpegStreamSelector : IFFmpegStreamSelector
             .ToList();
         if (matchingTitle.Count != 0)
         {
-            _logger.LogDebug(
-                "Found {Count} audio streams with preferred title {Title}",
-                matchingTitle.Count,
-                title);
+            if (shouldLogMessages)
+            {
+                _logger.LogDebug(
+                    "Found {Count} audio streams with preferred title {Title}",
+                    matchingTitle.Count,
+                    title);
+            }
 
-            return PrioritizeDefault(matchingTitle);
+            return PrioritizeDefault(matchingTitle, shouldLogMessages);
         }
 
-        _logger.LogDebug("Unable to find audio stream with preferred title {Title}", title);
+        if (shouldLogMessages)
+        {
+            _logger.LogDebug("Unable to find audio stream with preferred title {Title}", title);
+        }
 
-        return PrioritizeDefault(streams);
+        return PrioritizeDefault(streams, shouldLogMessages);
     }
 
-    private Option<MediaStream> PrioritizeDefault(IReadOnlyCollection<MediaStream> streams)
+    private Option<MediaStream> PrioritizeDefault(IReadOnlyCollection<MediaStream> streams, bool shouldLogMessages)
     {
         var sorted = streams.OrderByDescending(s => s.Channels).ToList();
         Option<MediaStream> maybeDefault = Optional(sorted.Find(s => s.Default));
         foreach (MediaStream stream in maybeDefault)
         {
-            _logger.LogDebug("Found audio stream flagged as default");
+            if (shouldLogMessages)
+            {
+                _logger.LogDebug("Found audio stream flagged as default");
+            }
+
             return stream;
         }
 
-        _logger.LogDebug("Unable to find default audio stream; selecting stream with most channels");
+        if (shouldLogMessages)
+        {
+            _logger.LogDebug("Unable to find default audio stream; selecting stream with most channels");
+        }
 
         return streams.HeadOrNone();
     }
@@ -364,20 +394,33 @@ public class FFmpegStreamSelector : IFFmpegStreamSelector
         Channel channel,
         List<string> preferredLanguageCodes,
         int episodeId,
-        MediaVersion version)
+        MediaVersion version,
+        bool shouldLogMessages)
     {
         string jsScriptPath = Path.ChangeExtension(
             Path.Combine(FileSystemLayout.AudioStreamSelectorScriptsFolder, "episode"),
             "js");
 
-        _logger.LogDebug("Checking for JS Script at {Path}", jsScriptPath);
+        if (shouldLogMessages)
+        {
+            _logger.LogDebug("Checking for JS Script at {Path}", jsScriptPath);
+        }
+
         if (!_fileSystem.File.Exists(jsScriptPath))
         {
-            _logger.LogDebug("Unable to locate episode audio stream selector script; falling back to built-in logic");
+            if (shouldLogMessages)
+            {
+                _logger.LogDebug(
+                    "Unable to locate episode audio stream selector script; falling back to built-in logic");
+            }
+
             return Option<MediaStream>.None;
         }
 
-        _logger.LogDebug("Found JS Script at {Path}", jsScriptPath);
+        if (shouldLogMessages)
+        {
+            _logger.LogDebug("Found JS Script at {Path}", jsScriptPath);
+        }
 
         await _scriptEngine.LoadAsync(jsScriptPath);
 
@@ -397,28 +440,40 @@ public class FFmpegStreamSelector : IFFmpegStreamSelector
             preferredLanguageCodes.ToArray(),
             audioStreams);
 
-        return ProcessScriptResult(version, result);
+        return ProcessScriptResult(version, result, shouldLogMessages);
     }
 
     private async Task<Option<MediaStream>> SelectMovieAudioStream(
         Channel channel,
         List<string> preferredLanguageCodes,
         int movieId,
-        MediaVersion version)
+        MediaVersion version,
+        bool shouldLogMessages)
     {
         string jsScriptPath = Path.ChangeExtension(
             Path.Combine(FileSystemLayout.AudioStreamSelectorScriptsFolder, "movie"),
             "js");
 
-        _logger.LogDebug("Checking for JS Script at {Path}", jsScriptPath);
+        if (shouldLogMessages)
+        {
+            _logger.LogDebug("Checking for JS Script at {Path}", jsScriptPath);
+        }
+
         if (!_fileSystem.File.Exists(jsScriptPath))
         {
-            _logger.LogDebug(
-                "Unable to locate movie audio stream selector script; falling back to built-in logic");
+            if (shouldLogMessages)
+            {
+                _logger.LogDebug(
+                    "Unable to locate movie audio stream selector script; falling back to built-in logic");
+            }
+
             return Option<MediaStream>.None;
         }
 
-        _logger.LogDebug("Found JS Script at {Path}", jsScriptPath);
+        if (shouldLogMessages)
+        {
+            _logger.LogDebug("Found JS Script at {Path}", jsScriptPath);
+        }
 
         await _scriptEngine.LoadAsync(jsScriptPath);
 
@@ -435,10 +490,10 @@ public class FFmpegStreamSelector : IFFmpegStreamSelector
             preferredLanguageCodes.ToArray(),
             audioStreams);
 
-        return ProcessScriptResult(version, result);
+        return ProcessScriptResult(version, result, shouldLogMessages);
     }
 
-    private Option<MediaStream> ProcessScriptResult(MediaVersion version, object result)
+    private Option<MediaStream> ProcessScriptResult(MediaVersion version, object result, bool shouldLogMessages)
     {
         if (result is double d)
         {
@@ -446,22 +501,32 @@ public class FFmpegStreamSelector : IFFmpegStreamSelector
             Option<MediaStream> maybeStream = version.Streams.Find(s => s.Index == streamIndex);
             foreach (MediaStream stream in maybeStream)
             {
-                _logger.LogDebug(
-                    "JS Script returned audio stream index {Index} with language {Language} and {Channels} audio channel(s)",
-                    streamIndex,
-                    stream.Language,
-                    stream.Channels);
+                if (shouldLogMessages)
+                {
+                    _logger.LogDebug(
+                        "JS Script returned audio stream index {Index} with language {Language} and {Channels} audio channel(s)",
+                        streamIndex,
+                        stream.Language,
+                        stream.Channels);
+                }
+
                 return stream;
             }
 
-            _logger.LogWarning(
-                "JS Script returned audio stream index {Index} which does not exist",
-                streamIndex);
+            if (shouldLogMessages)
+            {
+                _logger.LogWarning(
+                    "JS Script returned audio stream index {Index} which does not exist",
+                    streamIndex);
+            }
         }
         else
         {
-            _logger.LogInformation(
-                "JS Script did not return an audio stream index; falling back to built-in logic");
+            if (shouldLogMessages)
+            {
+                _logger.LogInformation(
+                    "JS Script did not return an audio stream index; falling back to built-in logic");
+            }
         }
 
         return Option<MediaStream>.None;

ErsatzTV.Core/Next/Config/ChannelConfig.cs

@@ -37,6 +37,9 @@ namespace ErsatzTV.Core.Next.Config
 
         [JsonProperty("ffprobe_path")]
         public string FfprobePath { get; set; }
+
+        [JsonProperty("preferred_filters", NullValueHandling = NullValueHandling.Ignore)]
+        public List<string> PreferredFilters { get; set; }
     }
 
     public partial class Normalization
@@ -44,6 +47,9 @@ namespace ErsatzTV.Core.Next.Config
         [JsonProperty("audio")]
         public Audio Audio { get; set; }
 
+        [JsonProperty("subtitle", NullValueHandling = NullValueHandling.Ignore)]
+        public Subtitle Subtitle { get; set; }
+
         [JsonProperty("video")]
         public Video Video { get; set; }
     }
@@ -84,6 +90,12 @@ namespace ErsatzTV.Core.Next.Config
         public double? TruePeak { get; set; }
     }
 
+    public partial class Subtitle
+    {
+        [JsonProperty("mode", NullValueHandling = NullValueHandling.Ignore)]
+        public Mode? Mode { get; set; }
+    }
+
     public partial class Video
     {
         [JsonProperty("accel")]
@@ -98,6 +110,9 @@ namespace ErsatzTV.Core.Next.Config
         [JsonProperty("buffer_kbps")]
         public long? BufferKbps { get; set; }
 
+        [JsonProperty("deinterlace", NullValueHandling = NullValueHandling.Ignore)]
+        public bool? Deinterlace { get; set; }
+
         [JsonProperty("format")]
         public VideoFormat? Format { get; set; }
 
@@ -131,6 +146,8 @@ namespace ErsatzTV.Core.Next.Config
 
     public enum AudioFormat { Aac, Ac3 };
 
+    public enum Mode { Burn, Convert };
+
     public enum AccelEnum { Cuda, Qsv, Vaapi, Videotoolbox, Vulkan };
 
     public enum VideoFormat { H264, Hevc };
@@ -156,6 +173,7 @@ namespace ErsatzTV.Core.Next.Config
             Converters =
             {
                 AudioFormatConverter.Singleton,
+                ModeConverter.Singleton,
                 AccelEnumConverter.Singleton,
                 VideoFormatConverter.Singleton,
                 VaapiDriverEnumConverter.Singleton,
@@ -205,6 +223,47 @@ namespace ErsatzTV.Core.Next.Config
         public static readonly AudioFormatConverter Singleton = new AudioFormatConverter();
     }
 
+    internal class ModeConverter : JsonConverter
+    {
+        public override bool CanConvert(Type t) => t == typeof(Mode) || t == typeof(Mode?);
+
+        public override object ReadJson(JsonReader reader, Type t, object existingValue, JsonSerializer serializer)
+        {
+            if (reader.TokenType == JsonToken.Null) return null;
+            var value = serializer.Deserialize<string>(reader);
+            switch (value)
+            {
+                case "burn":
+                    return Mode.Burn;
+                case "convert":
+                    return Mode.Convert;
+            }
+            throw new Exception("Cannot unmarshal type Mode");
+        }
+
+        public override void WriteJson(JsonWriter writer, object untypedValue, JsonSerializer serializer)
+        {
+            if (untypedValue == null)
+            {
+                serializer.Serialize(writer, null);
+                return;
+            }
+            var value = (Mode)untypedValue;
+            switch (value)
+            {
+                case Mode.Burn:
+                    serializer.Serialize(writer, "burn");
+                    return;
+                case Mode.Convert:
+                    serializer.Serialize(writer, "convert");
+                    return;
+            }
+            throw new Exception("Cannot marshal type Mode");
+        }
+
+        public static readonly ModeConverter Singleton = new ModeConverter();
+    }
+
     internal class AccelEnumConverter : JsonConverter
     {
         public override bool CanConvert(Type t) => t == typeof(AccelEnum) || t == typeof(AccelEnum?);

ErsatzTV.FFmpeg.Tests/ErsatzTV.FFmpeg.Tests.csproj

@@ -8,9 +8,9 @@
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="Microsoft.Extensions.DependencyModel" Version="[8.0.2]" />
-        <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="10.0.6" />
-        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.4.0" />
+        <PackageReference Include="Microsoft.Extensions.DependencyModel" Version="10.0.7" />
+        <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="10.0.7" />
+        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.5.1" />
         <PackageReference Include="NSubstitute" Version="5.3.0" />
         <PackageReference Include="NUnit" Version="4.5.1" />
         <PackageReference Include="NUnit3TestAdapter" Version="6.2.0" />

ErsatzTV.FFmpeg/ErsatzTV.FFmpeg.csproj

@@ -15,8 +15,8 @@
         <PackageReference Include="Hardware.Info" Version="101.1.1.1" />
         <PackageReference Include="LanguageExt.Core" Version="4.4.9" />
         <PackageReference Include="Lennox.NvEncSharp" Version="2.0.0" />
-        <PackageReference Include="Microsoft.Extensions.Caching.Abstractions" Version="10.0.6" />
-        <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="10.0.6" />
+        <PackageReference Include="Microsoft.Extensions.Caching.Abstractions" Version="10.0.7" />
+        <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="10.0.7" />
     </ItemGroup>
 
 

ErsatzTV.Infrastructure.MySql/Migrations/20260429142640_Add_ChannelNextEngineTextSubtitleMode.cs

@@ -0,0 +1,29 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace ErsatzTV.Infrastructure.MySql.Migrations
+{
+    /// <inheritdoc />
+    public partial class Add_ChannelNextEngineTextSubtitleMode : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<int>(
+                name: "NextEngineTextSubtitleMode",
+                table: "Channel",
+                type: "int",
+                nullable: false,
+                defaultValue: 0);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "NextEngineTextSubtitleMode",
+                table: "Channel");
+        }
+    }
+}

ErsatzTV.Infrastructure.MySql/Migrations/TvContextModelSnapshot.cs

@@ -331,6 +331,9 @@ namespace ErsatzTV.Infrastructure.MySql.Migrations
                         .HasColumnType("varchar(50)")
                         .UseCollation("utf8mb4_general_ci");
 
+                    b.Property<int>("NextEngineTextSubtitleMode")
+                        .HasColumnType("int");
+
                     b.Property<string>("Number")
                         .HasColumnType("varchar(255)");
 

ErsatzTV.Infrastructure.Sqlite/Migrations/20260429142552_Add_ChannelNextEngineTextSubtitleMode.cs

@@ -0,0 +1,29 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace ErsatzTV.Infrastructure.Sqlite.Migrations
+{
+    /// <inheritdoc />
+    public partial class Add_ChannelNextEngineTextSubtitleMode : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<int>(
+                name: "NextEngineTextSubtitleMode",
+                table: "Channel",
+                type: "INTEGER",
+                nullable: false,
+                defaultValue: 0);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "NextEngineTextSubtitleMode",
+                table: "Channel");
+        }
+    }
+}

ErsatzTV.Infrastructure.Sqlite/Migrations/TvContextModelSnapshot.cs

@@ -318,6 +318,9 @@ namespace ErsatzTV.Infrastructure.Sqlite.Migrations
                         .HasColumnType("varchar(50)")
                         .UseCollation("NOCASE");
 
+                    b.Property<int>("NextEngineTextSubtitleMode")
+                        .HasColumnType("INTEGER");
+
                     b.Property<string>("Number")
                         .HasColumnType("TEXT");
 

ErsatzTV.Infrastructure.Tests/ErsatzTV.Infrastructure.Tests.csproj

@@ -9,7 +9,7 @@
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.4.0" />
+        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.5.1" />
         <PackageReference Include="NSubstitute" Version="5.3.0" />
         <PackageReference Include="NUnit" Version="4.5.1" />
         <PackageReference Include="NUnit3TestAdapter" Version="6.2.0" />

ErsatzTV.Infrastructure/ErsatzTV.Infrastructure.csproj

@@ -16,7 +16,7 @@
         <PackageReference Include="CliWrap" Version="3.10.1" />
         <PackageReference Include="Dapper" Version="2.1.72" />
         <PackageReference Include="EFCore.BulkExtensions" Version="[9.0.2,10)" />
-        <PackageReference Include="Elastic.Clients.Elasticsearch" Version="9.3.4" />
+        <PackageReference Include="Elastic.Clients.Elasticsearch" Version="9.3.6" />
         <PackageReference Include="Humanizer.Core" Version="3.0.10" />
         <PackageReference Include="Jint" Version="4.8.0" />
         <PackageReference Include="JsonSchema.Net" Version="9.2.0" />

ErsatzTV.Scanner.Tests/ErsatzTV.Scanner.Tests.csproj

@@ -10,7 +10,7 @@
 
     <ItemGroup>
         <PackageReference Include="LanguageExt.Core" Version="4.4.9" />
-        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.4.0" />
+        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.5.1" />
         <PackageReference Include="NSubstitute" Version="5.3.0" />
         <PackageReference Include="NUnit" Version="4.5.1" />
         <PackageReference Include="NUnit3TestAdapter" Version="6.2.0" />

ErsatzTV.Scanner/ErsatzTV.Scanner.csproj

@@ -26,16 +26,16 @@
         <PackageReference Include="Humanizer.Core" Version="3.0.10" />
         <PackageReference Include="LanguageExt.Core" Version="4.4.9" />
         <PackageReference Include="MediatR" Version="[12.5.0]" />
-        <PackageReference Include="Microsoft.Extensions.Caching.Memory" Version="10.0.6" />
-        <PackageReference Include="Microsoft.Extensions.Configuration" Version="10.0.6" />
-        <PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="10.0.6" />
+        <PackageReference Include="Microsoft.Extensions.Caching.Memory" Version="10.0.7" />
+        <PackageReference Include="Microsoft.Extensions.Configuration" Version="10.0.7" />
+        <PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="10.0.7" />
         <PackageReference Include="Serilog" Version="4.3.1" />
         <PackageReference Include="Serilog.AspNetCore" Version="10.0.0" />
         <PackageReference Include="Serilog.Extensions.Hosting" Version="10.0.0" />
         <PackageReference Include="Serilog.Formatting.Compact" Version="3.0.0" />
         <PackageReference Include="Serilog.Sinks.Console" Version="6.1.1" />
         <PackageReference Include="Serilog.Sinks.File" Version="7.0.0" />
-        <PackageReference Include="System.CommandLine" Version="2.0.6" />
+        <PackageReference Include="System.CommandLine" Version="2.0.7" />
     </ItemGroup>
 
     <ItemGroup>

ErsatzTV/ErsatzTV.csproj

@@ -31,7 +31,7 @@
     <ItemGroup>
         <!-- <PackageReference Include="EntityFrameworkProfiler.Appender" Version="6.0.6049" /> -->
         <PackageReference Include="Blazored.FluentValidation" Version="2.2.0" />
-        <PackageReference Include="BlazorSortable" Version="6.0.0" />
+        <PackageReference Include="BlazorSortable" Version="6.0.1" />
         <PackageReference Include="Chronic.Core" Version="0.4.0" />
         <PackageReference Include="FluentValidation" Version="12.1.1" />
         <PackageReference Include="FluentValidation.AspNetCore" Version="11.3.1" />
@@ -39,23 +39,23 @@
         <PackageReference Include="HtmlSanitizer" Version="9.0.892" />
         <PackageReference Include="LanguageExt.Core" Version="4.4.9" />
         <PackageReference Include="MediatR.Courier.DependencyInjection" Version="5.0.0" />
-        <PackageReference Include="Microsoft.AspNetCore.Authentication.JwtBearer" Version="10.0.6" />
-        <PackageReference Include="Microsoft.AspNetCore.Authentication.OpenIdConnect" Version="10.0.6" />
-        <PackageReference Include="Microsoft.AspNetCore.Mvc.NewtonsoftJson" Version="10.0.6" />
-        <PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="10.0.6" />
-        <PackageReference Include="Microsoft.AspNetCore.SpaServices.Extensions" Version="10.0.6" />
+        <PackageReference Include="Microsoft.AspNetCore.Authentication.JwtBearer" Version="10.0.7" />
+        <PackageReference Include="Microsoft.AspNetCore.Authentication.OpenIdConnect" Version="10.0.7" />
+        <PackageReference Include="Microsoft.AspNetCore.Mvc.NewtonsoftJson" Version="10.0.7" />
+        <PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="10.0.7" />
+        <PackageReference Include="Microsoft.AspNetCore.SpaServices.Extensions" Version="10.0.7" />
         <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="9.0.15">
             <PrivateAssets>all</PrivateAssets>
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
         </PackageReference>
-        <PackageReference Include="Microsoft.Extensions.ApiDescription.Server" Version="10.0.6">
+        <PackageReference Include="Microsoft.Extensions.ApiDescription.Server" Version="10.0.7">
           <PrivateAssets>all</PrivateAssets>
           <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
         </PackageReference>
-        <PackageReference Include="MudBlazor" Version="9.3.0" />
+        <PackageReference Include="MudBlazor" Version="9.4.0" />
         <PackageReference Include="NaturalSort.Extension" Version="4.4.1" />
         <PackageReference Include="Refit.HttpClientFactory" Version="10.1.6" />
-        <PackageReference Include="Scalar.AspNetCore" Version="2.14.1" />
+        <PackageReference Include="Scalar.AspNetCore" Version="2.14.6" />
         <PackageReference Include="Serilog" Version="4.3.1" />
         <PackageReference Include="Serilog.AspNetCore" Version="10.0.0" />
         <PackageReference Include="Serilog.Settings.Configuration" Version="10.0.0" />

ErsatzTV/Pages/ChannelEditor.razor

@@ -140,6 +140,18 @@ else
         <MudSelectItem Value="@(StreamingEngine.Next)">Next</MudSelectItem>
     </MudSelect>
 </MudStack>
+@if (_model.StreamingEngine is StreamingEngine.Next)
+{
+    <MudStack Row="true" Breakpoint="Breakpoint.SmAndDown" Class="form-field-stack gap-md-8 mb-5">
+        <div class="d-flex">
+            <MudText>Next Engine Text Subtitle Mode</MudText>
+        </div>
+        <MudSelect @bind-Value="_model.NextEngineTextSubtitleMode" For="@(() => _model.NextEngineTextSubtitleMode)">
+            <MudSelectItem Value="@(NextEngineTextSubtitleMode.Burn)">Burn</MudSelectItem>
+            <MudSelectItem Value="@(NextEngineTextSubtitleMode.Convert)">Convert If Possible</MudSelectItem>
+        </MudSelect>
+    </MudStack>
+}
 <MudStack Row="true" Breakpoint="Breakpoint.SmAndDown" Class="form-field-stack gap-md-8 mb-5">
     <div class="d-flex">
         <MudText>Streaming Mode</MudText>
@@ -421,6 +433,7 @@ else
                         _model.MirrorSourceChannelId = channelViewModel.MirrorSourceChannelId;
                         _model.PlayoutOffset = channelViewModel.PlayoutOffset;
                         _model.StreamingEngine = channelViewModel.StreamingEngine;
+                        _model.NextEngineTextSubtitleMode = channelViewModel.NextEngineTextSubtitleMode;
                         _model.StreamingMode = channelViewModel.StreamingMode;
                         _model.StreamSelectorMode = channelViewModel.StreamSelectorMode;
                         _model.StreamSelector = channelViewModel.StreamSelector;
@@ -453,6 +466,7 @@ else
                 _model.Group = "ErsatzTV";
                 _model.FFmpegProfileId = ffmpegSettings.DefaultFFmpegProfileId;
                 _model.StreamingEngine = StreamingEngine.Legacy;
+                _model.NextEngineTextSubtitleMode = NextEngineTextSubtitleMode.Burn;
                 _model.StreamingMode = StreamingMode.TransportStreamHybrid;
                 _model.IsEnabled = true;
                 _model.ShowInEpg = true;

ErsatzTV/Shared/ChannelPreviewDialog.razor

@@ -9,6 +9,7 @@
                 <media-control-bar>
                     <media-mute-button></media-mute-button>
                     <media-volume-range></media-volume-range>
+                    <media-captions-button></media-captions-button>
                     <media-fullscreen-button></media-fullscreen-button>
                 </media-control-bar>
             </media-controller>

ErsatzTV/ViewModels/ChannelEditViewModel.cs

@@ -44,6 +44,7 @@ public class ChannelEditViewModel
         }
     }
 
+    public NextEngineTextSubtitleMode NextEngineTextSubtitleMode { get; set; }
     public StreamingMode StreamingMode { get; set; }
     public int? WatermarkId { get; set; }
     public int? FallbackFillerId { get; set; }
@@ -86,6 +87,7 @@ public class ChannelEditViewModel
             MirrorSourceChannelId,
             PlayoutOffset,
             StreamingEngine,
+            NextEngineTextSubtitleMode,
             StreamingMode,
             WatermarkId,
             FallbackFillerId,
@@ -119,6 +121,7 @@ public class ChannelEditViewModel
             MirrorSourceChannelId,
             PlayoutOffset,
             StreamingEngine,
+            NextEngineTextSubtitleMode,
             StreamingMode,
             WatermarkId,
             FallbackFillerId,