diff --git a/JellyfinPlugin/Api/BlackBarService.cs b/JellyfinPlugin/Api/BlackBarService.cs
index 367863b..7d7f242 100644
--- a/JellyfinPlugin/Api/BlackBarService.cs
+++ b/JellyfinPlugin/Api/BlackBarService.cs
@@ -25,6 +25,7 @@ namespace JellyfinPlugin.Api
         public ContentResult GetCropByPath([FromQuery] string path)
         {
             if (string.IsNullOrEmpty(path)) return Content(string.Empty, "text/plain");
+            path = path.Trim('"').Trim('\'');
             
             var mode = Plugin.Instance!.Configuration.PlaybackMode;
             if (mode == "Client") return Content(string.Empty, "text/plain");
diff --git a/JellyfinPlugin/CropHelper.cs b/JellyfinPlugin/CropHelper.cs
index eb6498e..05d03ca 100644
--- a/JellyfinPlugin/CropHelper.cs
+++ b/JellyfinPlugin/CropHelper.cs
@@ -9,6 +9,13 @@ namespace JellyfinPlugin
 {
     public static class CropHelper
     {
+        private static string GetFFmpegPath()
+        {
+            if (File.Exists("/usr/lib/jellyfin-ffmpeg/ffmpeg")) return "/usr/lib/jellyfin-ffmpeg/ffmpeg";
+            if (File.Exists("/usr/bin/ffmpeg")) return "/usr/bin/ffmpeg";
+            return "ffmpeg";
+        }
+
         public static async Task<string> DetectCropAsync(string filePath, double limit)
         {
             // FFmpeg w nowych wersjach przyjmuje limit w formie ułamka, np. 24/255 to ok 0.094
@@ -17,7 +24,7 @@ namespace JellyfinPlugin
 
             var startInfo = new ProcessStartInfo
             {
-                FileName = "ffmpeg", 
+                FileName = GetFFmpegPath(), 
                 // KLUCZOWE: reset=1, żeby oceniał każdą klatkę niezależnie!
                 Arguments = $"-skip_frame nokey -i \"{filePath}\" -vf \"cropdetect=limit={limitStr}:round=16:reset=1\" -f null -",
                 RedirectStandardError = true,
diff --git a/JellyfinPlugin/LibraryMonitor.cs b/JellyfinPlugin/LibraryMonitor.cs
index e9c1363..7c8f31c 100644
--- a/JellyfinPlugin/LibraryMonitor.cs
+++ b/JellyfinPlugin/LibraryMonitor.cs
@@ -57,7 +57,9 @@ namespace JellyfinPlugin
         {
             try
             {
-                if (video.ProviderIds != null && video.ProviderIds.ContainsKey("BlackBarCrop"))
+                if (video.ProviderIds != null && 
+                    video.ProviderIds.TryGetValue("BlackBarCrop", out string? existingCrop) && 
+                    !string.IsNullOrEmpty(existingCrop))
                 {
                     return;
                 }
diff --git a/JellyfinPlugin/Tasks/LibraryRetroactiveScanTask.cs b/JellyfinPlugin/Tasks/LibraryRetroactiveScanTask.cs
index 6b6ce51..4b19445 100644
--- a/JellyfinPlugin/Tasks/LibraryRetroactiveScanTask.cs
+++ b/JellyfinPlugin/Tasks/LibraryRetroactiveScanTask.cs
@@ -48,7 +48,9 @@ namespace JellyfinPlugin.Tasks
             {
                 cancellationToken.ThrowIfCancellationRequested();
 
-                if (item.ProviderIds != null && item.ProviderIds.ContainsKey("BlackBarCrop"))
+                if (item.ProviderIds != null && 
+                    item.ProviderIds.TryGetValue("BlackBarCrop", out string? existingCrop) && 
+                    !string.IsNullOrEmpty(existingCrop))
                 {
                     processed++;
                     progress.Report((processed / (double)total) * 100);
@@ -62,18 +64,16 @@ namespace JellyfinPlugin.Tasks
                     {
                         string cropData = await CropHelper.DetectCropAsync(path, config.CropDetectLimit);
                         
-                        if (item.ProviderIds == null)
-                        {
-                            item.ProviderIds = new Dictionary<string, string>();
-                        }
-                        
-                        // Zawsze dodajemy flagę, nawet jak puste, żeby nie skanować drugi raz tego samego pliku
-                        // (puste oznacza że nie ma czarnych pasów do ucięcia)
-                        item.ProviderIds["BlackBarCrop"] = cropData ?? string.Empty;
-                        await _libraryManager.UpdateItemAsync(item, item, ItemUpdateType.MetadataEdit, cancellationToken);
-                        
                         if (!string.IsNullOrEmpty(cropData))
+                        {
+                            if (item.ProviderIds == null)
+                            {
+                                item.ProviderIds = new Dictionary<string, string>();
+                            }
+                            item.ProviderIds["BlackBarCrop"] = cropData;
+                            await _libraryManager.UpdateItemAsync(item, item, ItemUpdateType.MetadataEdit, cancellationToken);
                             _logger.LogInformation("Found black bars {Crop} in {Path}", cropData, path);
+                        }
                     }
                     catch (Exception ex)
                     {
diff --git a/JellyfinPlugin/WrapperGenerator.cs b/JellyfinPlugin/WrapperGenerator.cs
index 1ba0ce5..95bad56 100644
--- a/JellyfinPlugin/WrapperGenerator.cs
+++ b/JellyfinPlugin/WrapperGenerator.cs
@@ -92,9 +92,7 @@ for (( i=1; i<=$#; i++ )); do
 done
 
 if [ -n ""$INPUT_FILE"" ]; then
-    # Jellyfin przekazuje ścieżkę z prefiksem file: (np. file:""/home/..."").
-    # Shell usuwa cudzysłowy automatycznie – zostaje nam tylko file: do usunięcia.
-    CLEAN_PATH=""${{INPUT_FILE#file:}}""
+    CLEAN_PATH=$(echo ""$INPUT_FILE"" | tr -d '""' | sed 's/^file://')
     
     CROP_DATA=$(curl -s --max-time 1 -G --data-urlencode ""Path=$CLEAN_PATH"" http://127.0.0.1:8096/BlackBarRemover/CropByPath)