generate music video credits (#832)

CHANGELOG.md

@@ -7,6 +7,10 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 ### Fixed
 - Fix Jellyfin show library paging
 
+### Added
+- Add basic music video credits subtitle generation
+  - This can be enabled in channel settings
+
 ## [0.6.0-beta] - 2022-06-01
 ### Fixed
 - Additional fix for duplicate `Other Videos` entries; trash may need to be emptied one last time after upgrading

ErsatzTV.Application/Channels/ChannelViewModel.cs

@@ -16,4 +16,5 @@ public record ChannelViewModel(
     int? FallbackFillerId,
     int PlayoutCount,
     string PreferredSubtitleLanguageCode,
-    ChannelSubtitleMode SubtitleMode);
+    ChannelSubtitleMode SubtitleMode,
+    ChannelMusicVideoCreditsMode MusicVideoCreditsMode);

ErsatzTV.Application/Channels/Commands/CreateChannel.cs

@@ -16,4 +16,5 @@ public record CreateChannel
     int? WatermarkId,
     int? FallbackFillerId,
     string PreferredSubtitleLanguageCode,
-    ChannelSubtitleMode SubtitleMode) : IRequest<Either<BaseError, CreateChannelResult>>;
+    ChannelSubtitleMode SubtitleMode,
+    ChannelMusicVideoCreditsMode MusicVideoCreditsMode) : IRequest<Either<BaseError, CreateChannelResult>>;

ErsatzTV.Application/Channels/Commands/CreateChannelHandler.cs

@@ -21,7 +21,7 @@ public class CreateChannelHandler : IRequestHandler<CreateChannel, Either<BaseEr
     {
         await using TvContext dbContext = await _dbContextFactory.CreateDbContextAsync(cancellationToken);
         Validation<BaseError, Channel> validation = await Validate(dbContext, request);
-        return await LanguageExtensions.Apply(validation, c => PersistChannel(dbContext, c));
+        return await validation.Apply(c => PersistChannel(dbContext, c));
     }
 
     private static async Task<CreateChannelResult> PersistChannel(TvContext dbContext, Channel channel)
@@ -36,6 +36,7 @@ public class CreateChannelHandler : IRequestHandler<CreateChannel, Either<BaseEr
             await FFmpegProfileMustExist(dbContext, request),
             ValidatePreferredAudioLanguage(request),
             ValidatePreferredSubtitleLanguage(request),
+            ValidateSubtitleAndMusicCredits(request),
             await WatermarkMustExist(dbContext, request),
             await FillerPresetMustExist(dbContext, request))
         .Apply(
@@ -45,6 +46,7 @@ public class CreateChannelHandler : IRequestHandler<CreateChannel, Either<BaseEr
                 ffmpegProfileId,
                 preferredAudioLanguageCode,
                 preferredSubtitleLanguageCode,
+                _,
                 watermarkId,
                 fillerPresetId) =>
             {
@@ -72,7 +74,8 @@ public class CreateChannelHandler : IRequestHandler<CreateChannel, Either<BaseEr
                     Artwork = artwork,
                     PreferredAudioLanguageCode = preferredAudioLanguageCode,
                     PreferredSubtitleLanguageCode = preferredSubtitleLanguageCode,
-                    SubtitleMode = request.SubtitleMode
+                    SubtitleMode = request.SubtitleMode,
+                    MusicVideoCreditsMode = request.MusicVideoCreditsMode
                 };
 
                 foreach (int id in watermarkId)
@@ -106,6 +109,17 @@ public class CreateChannelHandler : IRequestHandler<CreateChannel, Either<BaseEr
                     ci => string.Equals(ci.ThreeLetterISOLanguageName, lc, StringComparison.OrdinalIgnoreCase)))
             .ToValidation<BaseError>("Preferred subtitle language code is invalid");
 
+    private static Validation<BaseError, string> ValidateSubtitleAndMusicCredits(CreateChannel createChannel)
+    {
+        if (createChannel.MusicVideoCreditsMode != ChannelMusicVideoCreditsMode.None &&
+            createChannel.SubtitleMode == ChannelSubtitleMode.None)
+        {
+            return BaseError.New("Subtitles are required for music video credits");
+        }
+
+        return string.Empty;
+    }
+
     private static async Task<Validation<BaseError, string>> ValidateNumber(
         TvContext dbContext,
         CreateChannel createChannel)

ErsatzTV.Application/Channels/Commands/UpdateChannel.cs

@@ -17,4 +17,5 @@ public record UpdateChannel
     int? WatermarkId,
     int? FallbackFillerId,
     string PreferredSubtitleLanguageCode,
-    ChannelSubtitleMode SubtitleMode) : IRequest<Either<BaseError, ChannelViewModel>>;
+    ChannelSubtitleMode SubtitleMode,
+    ChannelMusicVideoCreditsMode MusicVideoCreditsMode) : IRequest<Either<BaseError, ChannelViewModel>>;

ErsatzTV.Application/Channels/Commands/UpdateChannelHandler.cs

@@ -44,6 +44,7 @@ public class UpdateChannelHandler : IRequestHandler<UpdateChannel, Either<BaseEr
         c.PreferredAudioLanguageCode = update.PreferredAudioLanguageCode;
         c.PreferredSubtitleLanguageCode = update.PreferredSubtitleLanguageCode;
         c.SubtitleMode = update.SubtitleMode;
+        c.MusicVideoCreditsMode = update.MusicVideoCreditsMode;
         c.Artwork ??= new List<Artwork>();
 
         if (!string.IsNullOrWhiteSpace(update.Logo))
@@ -92,8 +93,9 @@ public class UpdateChannelHandler : IRequestHandler<UpdateChannel, Either<BaseEr
     private async Task<Validation<BaseError, Channel>> Validate(TvContext dbContext, UpdateChannel request) =>
         (await ChannelMustExist(dbContext, request), ValidateName(request),
             await ValidateNumber(dbContext, request),
-            ValidatePreferredAudioLanguage(request))
-        .Apply((channelToUpdate, _, _, _) => channelToUpdate);
+            ValidatePreferredAudioLanguage(request),
+            ValidateSubtitleAndMusicCredits(request))
+        .Apply((channelToUpdate, _, _, _, _) => channelToUpdate);
 
     private static Task<Validation<BaseError, Channel>> ChannelMustExist(
         TvContext dbContext,
@@ -135,4 +137,15 @@ public class UpdateChannelHandler : IRequestHandler<UpdateChannel, Either<BaseEr
                 lc => string.IsNullOrWhiteSpace(lc) || CultureInfo.GetCultures(CultureTypes.NeutralCultures).Any(
                     ci => string.Equals(ci.ThreeLetterISOLanguageName, lc, StringComparison.OrdinalIgnoreCase)))
             .ToValidation<BaseError>("Preferred audio language code is invalid");
+
+    private static Validation<BaseError, string> ValidateSubtitleAndMusicCredits(UpdateChannel updateChannel)
+    {
+        if (updateChannel.MusicVideoCreditsMode != ChannelMusicVideoCreditsMode.None &&
+            updateChannel.SubtitleMode == ChannelSubtitleMode.None)
+        {
+            return BaseError.New("Subtitles are required for music video credits");
+        }
+
+        return string.Empty;
+    }
 }

ErsatzTV.Application/Channels/Mapper.cs

@@ -20,7 +20,8 @@ internal static class Mapper
             channel.FallbackFillerId,
             channel.Playouts?.Count ?? 0,
             channel.PreferredSubtitleLanguageCode,
-            channel.SubtitleMode);
+            channel.SubtitleMode,
+            channel.MusicVideoCreditsMode);
 
     internal static ChannelResponseModel ProjectToResponseModel(Channel channel) =>
         new(

ErsatzTV.Application/Streaming/Queries/GetPlayoutItemProcessByChannelNumberHandler.cs

@@ -27,6 +27,7 @@ public class GetPlayoutItemProcessByChannelNumberHandler : FFmpegProcessHandler<
     private readonly ILocalFileSystem _localFileSystem;
     private readonly ILogger<GetPlayoutItemProcessByChannelNumberHandler> _logger;
     private readonly IMediaCollectionRepository _mediaCollectionRepository;
+    private readonly IMusicVideoCreditsGenerator _musicVideoCreditsGenerator;
     private readonly IPlexPathReplacementService _plexPathReplacementService;
     private readonly ISongVideoGenerator _songVideoGenerator;
     private readonly ITelevisionRepository _televisionRepository;
@@ -42,6 +43,7 @@ public class GetPlayoutItemProcessByChannelNumberHandler : FFmpegProcessHandler<
         ITelevisionRepository televisionRepository,
         IArtistRepository artistRepository,
         ISongVideoGenerator songVideoGenerator,
+        IMusicVideoCreditsGenerator musicVideoCreditsGenerator,
         ILogger<GetPlayoutItemProcessByChannelNumberHandler> logger)
         : base(dbContextFactory)
     {
@@ -54,6 +56,7 @@ public class GetPlayoutItemProcessByChannelNumberHandler : FFmpegProcessHandler<
         _televisionRepository = televisionRepository;
         _artistRepository = artistRepository;
         _songVideoGenerator = songVideoGenerator;
+        _musicVideoCreditsGenerator = musicVideoCreditsGenerator;
         _logger = logger;
     }
 
@@ -96,6 +99,9 @@ public class GetPlayoutItemProcessByChannelNumberHandler : FFmpegProcessHandler<
             .ThenInclude(mi => (mi as MusicVideo).MediaVersions)
             .ThenInclude(mv => mv.Streams)
             .Include(i => i.MediaItem)
+            .ThenInclude(mi => (mi as MusicVideo).Artist)
+            .ThenInclude(mv => mv.ArtistMetadata)
+            .Include(i => i.MediaItem)
             .ThenInclude(mi => (mi as OtherVideo).OtherVideoMetadata)
             .ThenInclude(ovm => ovm.Subtitles)
             .Include(i => i.MediaItem)
@@ -155,7 +161,7 @@ public class GetPlayoutItemProcessByChannelNumberHandler : FFmpegProcessHandler<
                 .GetValue<bool>(ConfigElementKey.FFmpegSaveReports)
                 .Map(result => result.IfNone(false));
 
-            List<Subtitle> subtitles = GetSubtitles(playoutItemWithPath);
+            List<Subtitle> subtitles = await GetSubtitles(playoutItemWithPath, channel);
 
             Command process = await _ffmpegProcessService.ForPlayoutItem(
                 ffmpegPath,
@@ -256,22 +262,22 @@ public class GetPlayoutItemProcessByChannelNumberHandler : FFmpegProcessHandler<
         return BaseError.New($"Unexpected error locating playout item for channel {channel.Number}");
     }
 
-    private static List<Subtitle> GetSubtitles(PlayoutItemWithPath playoutItemWithPath)
+    private async Task<List<Subtitle>> GetSubtitles(
+        PlayoutItemWithPath playoutItemWithPath,
+        Channel channel)
     {
         List<Subtitle> allSubtitles = playoutItemWithPath.PlayoutItem.MediaItem switch
         {
-            Episode episode => Optional(episode.EpisodeMetadata).Flatten().HeadOrNone()
-                .Map(mm => mm.Subtitles ?? new List<Subtitle>())
-                .IfNone(new List<Subtitle>()),
-            Movie movie => Optional(movie.MovieMetadata).Flatten().HeadOrNone()
+            Episode episode => await Optional(episode.EpisodeMetadata).Flatten().HeadOrNone()
                 .Map(mm => mm.Subtitles ?? new List<Subtitle>())
-                .IfNone(new List<Subtitle>()),
-            MusicVideo musicVideo => Optional(musicVideo.MusicVideoMetadata).Flatten().HeadOrNone()
+                .IfNoneAsync(new List<Subtitle>()),
+            Movie movie => await Optional(movie.MovieMetadata).Flatten().HeadOrNone()
                 .Map(mm => mm.Subtitles ?? new List<Subtitle>())
-                .IfNone(new List<Subtitle>()),
-            OtherVideo otherVideo => Optional(otherVideo.OtherVideoMetadata).Flatten().HeadOrNone()
+                .IfNoneAsync(new List<Subtitle>()),
+            MusicVideo musicVideo => await GetMusicVideoSubtitles(musicVideo, channel),
+            OtherVideo otherVideo => await Optional(otherVideo.OtherVideoMetadata).Flatten().HeadOrNone()
                 .Map(mm => mm.Subtitles ?? new List<Subtitle>())
-                .IfNone(new List<Subtitle>()),
+                .IfNoneAsync(new List<Subtitle>()),
             _ => new List<Subtitle>()
         };
 
@@ -309,6 +315,27 @@ public class GetPlayoutItemProcessByChannelNumberHandler : FFmpegProcessHandler<
         return allSubtitles;
     }
 
+    private async Task<List<Subtitle>> GetMusicVideoSubtitles(MusicVideo musicVideo, Channel channel)
+    {
+        var subtitles = new List<Subtitle>();
+
+        bool musicVideoCredits = channel.MusicVideoCreditsMode == ChannelMusicVideoCreditsMode.GenerateSubtitles;
+        if (musicVideoCredits)
+        {
+            subtitles.AddRange(
+                await _musicVideoCreditsGenerator.GenerateCreditsSubtitle(musicVideo, channel.FFmpegProfile));
+        }
+        else
+        {
+            subtitles.AddRange(
+                await Optional(musicVideo.MusicVideoMetadata).Flatten().HeadOrNone()
+                    .Map(mm => mm.Subtitles)
+                    .IfNoneAsync(new List<Subtitle>()));
+        }
+
+        return subtitles;
+    }
+
     private async Task<Either<BaseError, PlayoutItemWithPath>> CheckForFallbackFiller(
         TvContext dbContext,
         Channel channel,

ErsatzTV.Core/Domain/Channel.cs

@@ -25,4 +25,5 @@ public class Channel
     public string PreferredAudioLanguageCode { get; set; }
     public string PreferredSubtitleLanguageCode { get; set; }
     public ChannelSubtitleMode SubtitleMode { get; set; }
+    public ChannelMusicVideoCreditsMode MusicVideoCreditsMode { get; set; }
 }

ErsatzTV.Core/Domain/ChannelMusicVideoCreditsMode.cs

@@ -0,0 +1,7 @@
+namespace ErsatzTV.Core.Domain;
+
+public enum ChannelMusicVideoCreditsMode
+{
+    None = 0,
+    GenerateSubtitles = 1
+}

ErsatzTV.Core/FFmpeg/MusicVideoCreditsGenerator.cs

@@ -0,0 +1,78 @@
+using System.Text;
+using ErsatzTV.Core.Domain;
+using ErsatzTV.Core.Interfaces.FFmpeg;
+
+namespace ErsatzTV.Core.FFmpeg;
+
+public class MusicVideoCreditsGenerator : IMusicVideoCreditsGenerator
+{
+    private readonly ITempFilePool _tempFilePool;
+
+    public MusicVideoCreditsGenerator(ITempFilePool tempFilePool) => _tempFilePool = tempFilePool;
+
+    public async Task<Option<Subtitle>> GenerateCreditsSubtitle(MusicVideo musicVideo, FFmpegProfile ffmpegProfile)
+    {
+        const int HORIZONTAL_MARGIN_PERCENT = 3;
+        const int VERTICAL_MARGIN_PERCENT = 5;
+
+        var fontSize = (int)Math.Round(ffmpegProfile.Resolution.Height / 20.0);
+
+        int leftMarginPercent = HORIZONTAL_MARGIN_PERCENT;
+        int rightMarginPercent = HORIZONTAL_MARGIN_PERCENT;
+
+        var leftMargin = (int)Math.Round(leftMarginPercent / 100.0 * ffmpegProfile.Resolution.Width);
+        var rightMargin = (int)Math.Round(rightMarginPercent / 100.0 * ffmpegProfile.Resolution.Width);
+        var verticalMargin =
+            (int)Math.Round(VERTICAL_MARGIN_PERCENT / 100.0 * ffmpegProfile.Resolution.Height);
+
+        foreach (MusicVideoMetadata metadata in musicVideo.MusicVideoMetadata)
+        {
+            var sb = new StringBuilder();
+
+            string artist = string.Empty;
+            foreach (ArtistMetadata artistMetadata in Optional(metadata.MusicVideo?.Artist?.ArtistMetadata).Flatten())
+            {
+                artist = artistMetadata.Title;
+            }
+
+            if (!string.IsNullOrWhiteSpace(artist))
+            {
+                sb.Append(artist);
+            }
+
+            if (!string.IsNullOrWhiteSpace(metadata.Title))
+            {
+                sb.Append($"\\N\"{metadata.Title}\"");
+            }
+
+            if (!string.IsNullOrWhiteSpace(metadata.Album))
+            {
+                sb.Append($"\\N{metadata.Album}");
+            }
+
+            string subtitles = await new SubtitleBuilder(_tempFilePool)
+                .WithResolution(ffmpegProfile.Resolution)
+                .WithFontName("OPTIKabel-Heavy")
+                .WithFontSize(fontSize)
+                .WithPrimaryColor("&HFFFFFF")
+                .WithOutlineColor("&H444444")
+                .WithAlignment(0)
+                .WithMarginRight(rightMargin)
+                .WithMarginLeft(leftMargin)
+                .WithMarginV(verticalMargin)
+                .WithBorderStyle(1)
+                .WithShadow(3)
+                .WithFormattedContent(sb.ToString())
+                .WithStartEnd(TimeSpan.FromSeconds(9), TimeSpan.FromSeconds(16))
+                .BuildFile();
+
+            return new Subtitle
+            {
+                Codec = "ass", Default = true, Forced = true, IsExtracted = false, SubtitleKind = SubtitleKind.Sidecar,
+                Path = subtitles, SDH = false
+            };
+        }
+
+        return None;
+    }
+}

ErsatzTV.Core/FFmpeg/SubtitleBuilder.cs

@@ -9,6 +9,7 @@ public class SubtitleBuilder
     private Option<int> _alignment;
     private Option<int> _borderStyle;
     private string _content;
+    private Option<TimeSpan> _end;
     private Option<string> _fontName;
     private Option<int> _fontSize;
     private int _marginLeft;
@@ -18,6 +19,7 @@ public class SubtitleBuilder
     private Option<string> _primaryColor;
     private Option<IDisplaySize> _resolution = None;
     private Option<int> _shadow;
+    private Option<TimeSpan> _start;
 
     public SubtitleBuilder(ITempFilePool tempFilePool) => _tempFilePool = tempFilePool;
 
@@ -93,6 +95,13 @@ public class SubtitleBuilder
         return this;
     }
 
+    public SubtitleBuilder WithStartEnd(TimeSpan start, TimeSpan end)
+    {
+        _start = start;
+        _end = end;
+        return this;
+    }
+
     public async Task<string> BuildFile()
     {
         string fileName = _tempFilePool.GetNextTempFile(TempFileCategory.Subtitle);
@@ -116,16 +125,23 @@ public class SubtitleBuilder
         sb.AppendLine(
             $"Style: Default,{await _fontName.IfNoneAsync("")},{await _fontSize.IfNoneAsync(32)},{await _primaryColor.IfNoneAsync("")},{await _outlineColor.IfNoneAsync("")},{await _borderStyle.IfNoneAsync(0)},1,{await _shadow.IfNoneAsync(0)},{await _alignment.IfNoneAsync(0)},1");
 
-        sb.AppendLine("[Events]");
-        sb.AppendLine("Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text");
-        sb.AppendLine(
-            $"Dialogue: 0,0:00:00.00,99:99:99.99,Default,,{_marginLeft},{_marginRight},{_marginV},,{_content}");
+        var start = "0:00:00.00";
+        foreach (TimeSpan startTime in _start)
+        {
+            start = $"{(int)startTime.TotalHours:00}:{startTime.ToString(@"mm\:ss\.ff")}";
+        }
 
-        if (!string.IsNullOrWhiteSpace(_content))
+        var end = "99:99:99.99";
+        foreach (TimeSpan endTime in _end)
         {
-            sb.AppendLine(_content);
+            end = $"{(int)endTime.TotalHours:00}:{endTime.ToString(@"mm\:ss\.ff")}";
         }
 
+        sb.AppendLine("[Events]");
+        sb.AppendLine("Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text");
+        sb.AppendLine(
+            @$"Dialogue: 0,{start},{end},Default,,{_marginLeft},{_marginRight},{_marginV},,{{\fad(1200,1200)}}{_content}");
+
         await File.WriteAllTextAsync(fileName, sb.ToString());
 
         return fileName;

ErsatzTV.Core/Interfaces/FFmpeg/IMusicVideoCreditsGenerator.cs

@@ -0,0 +1,8 @@
+using ErsatzTV.Core.Domain;
+
+namespace ErsatzTV.Core.Interfaces.FFmpeg;
+
+public interface IMusicVideoCreditsGenerator
+{
+    Task<Option<Subtitle>> GenerateCreditsSubtitle(MusicVideo musicVideo, FFmpegProfile ffmpegProfile);
+}

ErsatzTV.Infrastructure/Migrations/20220602225301_Add_ChannelMusicVideoCreditsMode.cs

@@ -0,0 +1,26 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace ErsatzTV.Infrastructure.Migrations
+{
+    public partial class Add_ChannelMusicVideoCreditsMode : Migration
+    {
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<int>(
+                name: "MusicVideoCreditsMode",
+                table: "Channel",
+                type: "INTEGER",
+                nullable: false,
+                defaultValue: 0);
+        }
+
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "MusicVideoCreditsMode",
+                table: "Channel");
+        }
+    }
+}

ErsatzTV.Infrastructure/Migrations/TvContextModelSnapshot.cs

@@ -233,6 +233,9 @@ namespace ErsatzTV.Infrastructure.Migrations
                         .HasColumnType("TEXT")
                         .HasDefaultValue("ErsatzTV");
 
+                    b.Property<int>("MusicVideoCreditsMode")
+                        .HasColumnType("INTEGER");
+
                     b.Property<string>("Name")
                         .HasColumnType("TEXT");
 

ErsatzTV/Pages/ChannelEditor.razor

@@ -10,10 +10,10 @@
 @using ErsatzTV.Core.Domain.Filler
 @using ErsatzTV.Application.Channels
 @implements IDisposable
-@inject NavigationManager _navigationManager
-@inject ILogger<ChannelEditor> _logger
-@inject ISnackbar _snackbar
-@inject IMediator _mediator
+@inject NavigationManager NavigationManager
+@inject ILogger<ChannelEditor> Logger
+@inject ISnackbar Snackbar
+@inject IMediator Mediator
 
 <MudContainer MaxWidth="MaxWidth.ExtraLarge" Class="pt-8">
     <div style="max-width: 400px;">
@@ -71,6 +71,10 @@
                         <MudSelectItem Value="@(ChannelSubtitleMode.Default)">Default</MudSelectItem>
                         <MudSelectItem Value="@(ChannelSubtitleMode.Any)">Any</MudSelectItem>
                     </MudSelect>
+                    <MudSelect Class="mt-3" Label="Music Video Credits Mode" @bind-Value="_model.MusicVideoCreditsMode" For="@(() => _model.MusicVideoCreditsMode)">
+                        <MudSelectItem Value="@(ChannelMusicVideoCreditsMode.None)">None</MudSelectItem>
+                        <MudSelectItem Value="@(ChannelMusicVideoCreditsMode.GenerateSubtitles)">Generate Subtitles</MudSelectItem>
+                    </MudSelect>
                     <MudGrid Class="mt-3" Style="align-items: center" Justify="Justify.Center">
                         <MudItem xs="6">
                             <InputFile id="fileInput" OnChange="UploadLogo" hidden/>
@@ -144,13 +148,13 @@
     protected override async Task OnParametersSetAsync()
     {
         await LoadFFmpegProfiles(_cts.Token);
-        _availableCultures = await _mediator.Send(new GetAllLanguageCodes(), _cts.Token);
+        _availableCultures = await Mediator.Send(new GetAllLanguageCodes(), _cts.Token);
         await LoadWatermarks(_cts.Token);
         await LoadFillerPresets(_cts.Token);
 
         if (Id.HasValue)
         {
-            Option<ChannelViewModel> maybeChannel = await _mediator.Send(new GetChannelById(Id.Value), _cts.Token);
+            Option<ChannelViewModel> maybeChannel = await Mediator.Send(new GetChannelById(Id.Value), _cts.Token);
             maybeChannel.Match(
                 channelViewModel =>
                 {
@@ -167,15 +171,16 @@
                     _model.FallbackFillerId = channelViewModel.FallbackFillerId;
                     _model.PreferredSubtitleLanguageCode = channelViewModel.PreferredSubtitleLanguageCode;
                     _model.SubtitleMode = channelViewModel.SubtitleMode;
+                    _model.MusicVideoCreditsMode = channelViewModel.MusicVideoCreditsMode;
                 },
-                () => _navigationManager.NavigateTo("404"));
+                () => NavigationManager.NavigateTo("404"));
         }
         else
         {
-            FFmpegSettingsViewModel ffmpegSettings = await _mediator.Send(new GetFFmpegSettings(), _cts.Token);
+            FFmpegSettingsViewModel ffmpegSettings = await Mediator.Send(new GetFFmpegSettings(), _cts.Token);
 
     // TODO: command for new channel
-            IEnumerable<int> channelNumbers = await _mediator.Send(new GetAllChannels(), _cts.Token)
+            IEnumerable<int> channelNumbers = await Mediator.Send(new GetAllChannels(), _cts.Token)
                 .Map(list => list.Map(c => int.TryParse(c.Number.Split(".").Head(), out int result) ? result : 0));
             int maxNumber = Optional(channelNumbers).Flatten().DefaultIfEmpty(0).Max();
             _model.Number = (maxNumber + 1).ToString();
@@ -195,13 +200,13 @@
     private bool IsEdit => Id.HasValue;
 
     private async Task LoadFFmpegProfiles(CancellationToken cancellationToken) =>
-        _ffmpegProfiles = await _mediator.Send(new GetAllFFmpegProfiles(), cancellationToken);
+        _ffmpegProfiles = await Mediator.Send(new GetAllFFmpegProfiles(), cancellationToken);
 
     private async Task LoadWatermarks(CancellationToken cancellationToken) =>
-        _watermarks = await _mediator.Send(new GetAllWatermarks(), cancellationToken);
+        _watermarks = await Mediator.Send(new GetAllWatermarks(), cancellationToken);
 
     private async Task LoadFillerPresets(CancellationToken cancellationToken) =>
-        _fillerPresets = await _mediator.Send(new GetAllFillerPresets(), cancellationToken)
+        _fillerPresets = await Mediator.Send(new GetAllFillerPresets(), cancellationToken)
             .Map(list => list.Filter(vm => vm.FillerKind == FillerKind.Fallback).ToList());
 
     private async Task HandleSubmitAsync()
@@ -210,16 +215,16 @@
         if (_editContext.Validate())
         {
             Seq<BaseError> errorMessage = IsEdit ?
-                (await _mediator.Send(_model.ToUpdate(), _cts.Token)).LeftToSeq() :
-                (await _mediator.Send(_model.ToCreate(), _cts.Token)).LeftToSeq();
+                (await Mediator.Send(_model.ToUpdate(), _cts.Token)).LeftToSeq() :
+                (await Mediator.Send(_model.ToCreate(), _cts.Token)).LeftToSeq();
 
             errorMessage.HeadOrNone().Match(
                 error =>
                 {
-                    _snackbar.Add(error.Value, Severity.Error);
-                    _logger.LogError("Unexpected error saving channel: {Error}", error.Value);
+                    Snackbar.Add(error.Value, Severity.Error);
+                    Logger.LogError("Unexpected error saving channel: {Error}", error.Value);
                 },
-                () => _navigationManager.NavigateTo("/channels"));
+                () => NavigationManager.NavigateTo("/channels"));
         }
     }
 
@@ -228,7 +233,7 @@
         try
         {
             Either<BaseError, string> maybeCacheFileName =
-                await _mediator.Send(new SaveArtworkToDisk(e.File.OpenReadStream(10 * 1024 * 1024), ArtworkKind.Logo), _cts.Token);
+                await Mediator.Send(new SaveArtworkToDisk(e.File.OpenReadStream(10 * 1024 * 1024), ArtworkKind.Logo), _cts.Token);
             maybeCacheFileName.Match(
                 relativeFileName =>
                 {
@@ -237,21 +242,19 @@
                 },
                 error =>
                 {
-                    Console.WriteLine($"error saving {error}");
-                    _snackbar.Add($"Unexpected error saving channel logo: {error.Value}", Severity.Error);
-                    _logger.LogError("Unexpected error saving channel logo: {Error}", error.Value);
+                    Snackbar.Add($"Unexpected error saving channel logo: {error.Value}", Severity.Error);
+                    Logger.LogError("Unexpected error saving channel logo: {Error}", error.Value);
                 });
         }
-        catch (IOException ex)
+        catch (IOException)
         {
-            Console.WriteLine(ex);
-            _snackbar.Add("Channel logo exceeds maximum allowed file size of 10 MB", Severity.Error);
-            _logger.LogError("Channel logo exceeds maximum allowed file size of 10 MB");
+            Snackbar.Add("Channel logo exceeds maximum allowed file size of 10 MB", Severity.Error);
+            Logger.LogError("Channel logo exceeds maximum allowed file size of 10 MB");
         }
         catch (Exception ex)
         {
-            _snackbar.Add($"Unexpected error saving channel logo: {ex.Message}", Severity.Error);
-            _logger.LogError("Unexpected error saving channel logo: {Error}", ex.Message);
+            Snackbar.Add($"Unexpected error saving channel logo: {ex.Message}", Severity.Error);
+            Logger.LogError("Unexpected error saving channel logo: {Error}", ex.Message);
         }
     }
 

ErsatzTV/Services/RunOnce/ResourceExtractorService.cs

@@ -19,13 +19,14 @@ public class ResourceExtractorService : IHostedService
         await ExtractResource(assembly, "song_background_2.png", cancellationToken);
         await ExtractResource(assembly, "song_background_3.png", cancellationToken);
         await ExtractResource(assembly, "ErsatzTV.png", cancellationToken);
-        await ExtractResource(assembly, "Roboto-Regular.ttf", cancellationToken);
-        await ExtractResource(assembly, "OPTIKabel-Heavy.otf", cancellationToken);
+
+        await ExtractFontResource(assembly, "Roboto-Regular.ttf", cancellationToken);
+        await ExtractFontResource(assembly, "OPTIKabel-Heavy.otf", cancellationToken);
     }
 
     public Task StopAsync(CancellationToken cancellationToken) => Task.CompletedTask;
 
-    private async Task ExtractResource(Assembly assembly, string name, CancellationToken cancellationToken)
+    private static async Task ExtractResource(Assembly assembly, string name, CancellationToken cancellationToken)
     {
         await using Stream resource = assembly.GetManifestResourceStream($"ErsatzTV.Resources.{name}");
         if (resource != null)
@@ -35,4 +36,21 @@ public class ResourceExtractorService : IHostedService
             await resource.CopyToAsync(fs, cancellationToken);
         }
     }
+
+    private static async Task ExtractFontResource(Assembly assembly, string name, CancellationToken cancellationToken)
+    {
+        await using Stream resource = assembly.GetManifestResourceStream($"ErsatzTV.Resources.{name}");
+        if (resource != null)
+        {
+            await using FileStream fs = File.Create(
+                Path.Combine(FileSystemLayout.ResourcesCacheFolder, name));
+            await resource.CopyToAsync(fs, cancellationToken);
+
+            resource.Position = 0;
+
+            await using FileStream fontCacheFileStream = File.Create(
+                Path.Combine(FileSystemLayout.FontsCacheFolder, name));
+            await resource.CopyToAsync(fontCacheFileStream, cancellationToken);
+        }
+    }
 }

ErsatzTV/Startup.cs

@@ -401,6 +401,7 @@ public class Startup
         services.AddScoped<FFmpegProcessService>();
 
         services.AddScoped<ISongVideoGenerator, SongVideoGenerator>();
+        services.AddScoped<IMusicVideoCreditsGenerator, MusicVideoCreditsGenerator>();
         services.AddScoped<HlsSessionWorker>();
         services.AddScoped<IGitHubApiClient, GitHubApiClient>();
         services.AddScoped<IHtmlSanitizer, HtmlSanitizer>(

ErsatzTV/ViewModels/ChannelEditViewModel.cs

@@ -18,6 +18,7 @@ public class ChannelEditViewModel
     public int? FallbackFillerId { get; set; }
     public string PreferredSubtitleLanguageCode { get; set; }
     public ChannelSubtitleMode SubtitleMode { get; set; }
+    public ChannelMusicVideoCreditsMode MusicVideoCreditsMode { get; set; }
 
     public UpdateChannel ToUpdate() =>
         new(
@@ -33,7 +34,8 @@ public class ChannelEditViewModel
             WatermarkId,
             FallbackFillerId,
             PreferredSubtitleLanguageCode,
-            SubtitleMode);
+            SubtitleMode,
+            MusicVideoCreditsMode);
 
     public CreateChannel ToCreate() =>
         new(
@@ -48,5 +50,6 @@ public class ChannelEditViewModel
             WatermarkId,
             FallbackFillerId,
             PreferredSubtitleLanguageCode,
-            SubtitleMode);
+            SubtitleMode,
+            MusicVideoCreditsMode);
 }