Chapter Images:

- chapter image extraction intervals, limit count and resolutions can be set by the user from the server general settings;

MediaBrowser.MediaEncoding/Encoder/MediaEncoder.cs

@@ -51,6 +51,7 @@ namespace MediaBrowser.MediaEncoding.Encoder
         private readonly IFileSystem _fileSystem;
         private readonly ILocalizationManager _localization;
         private readonly IConfiguration _config;
+        private readonly IServerConfigurationManager _serverConfig;
         private readonly string _startupOptionFFmpegPath;
 
         private readonly SemaphoreSlim _thumbnailResourcePool = new SemaphoreSlim(2, 2);
@@ -81,13 +82,15 @@ namespace MediaBrowser.MediaEncoding.Encoder
             IServerConfigurationManager configurationManager,
             IFileSystem fileSystem,
             ILocalizationManager localization,
-            IConfiguration config)
+            IConfiguration config,
+            IServerConfigurationManager serverConfig)
         {
             _logger = logger;
             _configurationManager = configurationManager;
             _fileSystem = fileSystem;
             _localization = localization;
             _config = config;
+            _serverConfig = serverConfig;
             _startupOptionFFmpegPath = config.GetValue<string>(Controller.Extensions.ConfigurationExtensions.FfmpegPathKey) ?? string.Empty;
             _jsonSerializerOptions = JsonDefaults.Options;
         }
@@ -598,6 +601,29 @@ namespace MediaBrowser.MediaEncoding.Encoder
                 _ => ".jpg"
             };
 
+            bool enumConversionStatus = Enum.TryParse(_serverConfig.Configuration.ChapterImageResolution, out ImageResolution resolution);
+            var outputResolution = string.Empty;
+
+            if (enumConversionStatus)
+            {
+                outputResolution = resolution switch
+                {
+                    ImageResolution.P240 => "426x240",
+                    ImageResolution.P360 => "640x360",
+                    ImageResolution.P480 => "854x480",
+                    ImageResolution.P720 => "1280x720",
+                    ImageResolution.P1080 => "1920x1080",
+                    ImageResolution.P1440 => "2560x1440",
+                    ImageResolution.P2160 => "3840x2160",
+                    _ => string.Empty
+                };
+
+                if (!string.IsNullOrEmpty(outputResolution))
+                {
+                    outputResolution = " -s " + outputResolution;
+                }
+            }
+
             var tempExtractPath = Path.Combine(_configurationManager.ApplicationPaths.TempDirectory, Guid.NewGuid() + outputExtension);
             Directory.CreateDirectory(Path.GetDirectoryName(tempExtractPath));
 
@@ -651,7 +677,7 @@ namespace MediaBrowser.MediaEncoding.Encoder
 
             var vf = string.Join(',', filters);
             var mapArg = imageStreamIndex.HasValue ? (" -map 0:" + imageStreamIndex.Value.ToString(CultureInfo.InvariantCulture)) : string.Empty;
-            var args = string.Format(CultureInfo.InvariantCulture, "-i {0}{3} -threads {4} -v quiet -vframes 1 -vf {2} -f image2 \"{1}\"", inputPath, tempExtractPath, vf, mapArg, _threads);
+            var args = string.Format(CultureInfo.InvariantCulture, "-i {0}{3} -threads {4} -v quiet -vframes 1 -vf {2}{5} -f image2 \"{1}\"", inputPath, tempExtractPath, vf, mapArg, _threads, outputResolution);
 
             if (offset.HasValue)
             {

MediaBrowser.Model/Configuration/ServerConfiguration.cs

@@ -240,5 +240,23 @@ namespace MediaBrowser.Model.Configuration
         /// Gets or sets a value indicating whether clients should be allowed to upload logs.
         /// </summary>
         public bool AllowClientLogUpload { get; set; } = true;
+
+        /// <summary>
+        /// Gets or sets the dummy chapters duration in seconds.
+        /// </summary>
+        /// <value>The dummy chapters duration.</value>
+        public int DummyChapterDuration { get; set; } = 300;
+
+        /// <summary>
+        /// Gets or sets the dummy chapter count.
+        /// </summary>
+        /// <value>The dummy chapter count.</value>
+        public int DummyChapterCount { get; set; } = 100;
+
+        /// <summary>
+        /// Gets or sets the chapter image resolution.
+        /// </summary>
+        /// <value>The chapter image resolution.</value>
+        public string ChapterImageResolution { get; set; } = "Match Source";
     }
 }

MediaBrowser.Model/Drawing/ImageResolution.cs

@@ -0,0 +1,43 @@
+namespace MediaBrowser.Model.Drawing
+{
+    /// <summary>
+    /// Enum ImageResolution.
+    /// </summary>
+    public enum ImageResolution
+    {
+        /// <summary>
+        /// 240p.
+        /// </summary>
+        P240,
+
+        /// <summary>
+        /// 360p.
+        /// </summary>
+        P360,
+
+        /// <summary>
+        /// 480p.
+        /// </summary>
+        P480,
+
+        /// <summary>
+        /// 720p.
+        /// </summary>
+        P720,
+
+        /// <summary>
+        /// 1080p.
+        /// </summary>
+        P1080,
+
+        /// <summary>
+        /// 1440p.
+        /// </summary>
+        P1440,
+
+        /// <summary>
+        /// 2160p.
+        /// </summary>
+        P2160
+    }
+}

MediaBrowser.Providers/MediaInfo/FFProbeVideoInfo.cs

@@ -48,8 +48,6 @@ namespace MediaBrowser.Providers.MediaInfo
         private readonly SubtitleResolver _subtitleResolver;
         private readonly IMediaSourceManager _mediaSourceManager;
 
-        private readonly long _dummyChapterDuration = TimeSpan.FromMinutes(5).Ticks;
-
         public FFProbeVideoInfo(
             ILogger logger,
             IMediaSourceManager mediaSourceManager,
@@ -651,6 +649,7 @@ namespace MediaBrowser.Providers.MediaInfo
         private ChapterInfo[] CreateDummyChapters(Video video)
         {
             var runtime = video.RunTimeTicks ?? 0;
+            long dummyChapterDuration = TimeSpan.FromSeconds(_config.Configuration.DummyChapterDuration).Ticks;
 
             if (runtime < 0)
             {
@@ -662,13 +661,13 @@ namespace MediaBrowser.Providers.MediaInfo
                         runtime));
             }
 
-            if (runtime < _dummyChapterDuration)
+            if (runtime < dummyChapterDuration)
             {
                 return Array.Empty<ChapterInfo>();
             }
 
             // Limit to 100 chapters just in case there's some incorrect metadata here
-            int chapterCount = (int)Math.Min(runtime / _dummyChapterDuration, 100);
+            int chapterCount = (int)Math.Min(runtime / dummyChapterDuration, _config.Configuration.DummyChapterCount);
             var chapters = new ChapterInfo[chapterCount];
 
             long currentChapterTicks = 0;
@@ -679,7 +678,7 @@ namespace MediaBrowser.Providers.MediaInfo
                     StartPositionTicks = currentChapterTicks
                 };
 
-                currentChapterTicks += _dummyChapterDuration;
+                currentChapterTicks += dummyChapterDuration;
             }
 
             return chapters;