1 files changed, 31 insertions, 2 deletions
diff --git a/MediaBrowser.MediaEncoding/Encoder/MediaEncoder.cs b/MediaBrowser.MediaEncoding/Encoder/MediaEncoder.cs
index ec3412f90..b7c49ed99 100644
--- a/MediaBrowser.MediaEncoding/Encoder/MediaEncoder.cs
+++ b/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);
@@ -93,13 +94,15 @@ 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;
         }
@@ -606,6 +609,32 @@ namespace MediaBrowser.MediaEncoding.Encoder
             return await ExtractImageInternal(inputArgument, container, videoStream, imageStreamIndex, threedFormat, offset, false, targetFormat, cancellationToken).ConfigureAwait(false);
         }
 
+        private string GetImageResolutionParameter()
+        {
+            string imageResolutionParameter;
+
+            imageResolutionParameter = _serverConfig.Configuration.ChapterImageResolution switch
+            {
+                ImageResolution.P144 => "256x144",
+                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(imageResolutionParameter))
+            {
+                imageResolutionParameter = " -s " + imageResolutionParameter;
+            }
+
+            return imageResolutionParameter;
+        }
+
+
         private async Task<string> ExtractImageInternal(string inputPath, string container, MediaStream videoStream, int? imageStreamIndex, Video3DFormat? threedFormat, TimeSpan? offset, bool useIFrame, ImageFormat? targetFormat, CancellationToken cancellationToken)
         {
             if (string.IsNullOrEmpty(inputPath))
@@ -676,7 +705,7 @@ 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, GetImageResolutionParameter());
 
             if (offset.HasValue)
             {