fix: delete yt-dlp partial files when it fails (v1.0.0.14)

yt-dlp removes its separate video/audio files after a successful merge, but
a failed run (e.g. HTTP 403 mid-download) left "<name>.f137.mp4.part" etc.
in the trailer folder, even when the built-in fallback then succeeded.
Always remove files sharing the output's "<name>." prefix after yt-dlp runs.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Jellyfin.Plugin.CinemaTrailers4Jellyfins/Jellyfin.Plugin.CinemaTrailers4Jellyfins.csproj

@@ -3,8 +3,8 @@
   <PropertyGroup>
     <TargetFramework>net9.0</TargetFramework>
     <RootNamespace>Jellyfin.Plugin.CinemaTrailers4Jellyfins</RootNamespace>
-    <AssemblyVersion>1.0.0.13</AssemblyVersion>
+    <AssemblyVersion>1.0.0.14</AssemblyVersion>
-    <FileVersion>1.0.0.13</FileVersion>
+    <FileVersion>1.0.0.14</FileVersion>
     <Nullable>enable</Nullable>
     <GenerateDocumentationFile>false</GenerateDocumentationFile>
     <TreatWarningsAsErrors>false</TreatWarningsAsErrors>

Jellyfin.Plugin.CinemaTrailers4Jellyfins/Services/TrailerDownloadService.cs

@@ -282,6 +282,32 @@ namespace Jellyfin.Plugin.CinemaTrailers4Jellyfins.Services
                 _logger.LogError(ex, "|CinemaTrailers4Jellyfins| yt-dlp download failed for {Key}", key);
                 return false;
             }
+            finally
+            {
+                DeleteYtDlpLeftovers(outputPath);
+            }
+        }
+
+        // yt-dlp names its separate/partial downloads "<output name>.f137.mp4.part", ".f140.m4a",
+        // ".ytdl", ... It removes them after a successful merge, but not when it fails. Everything
+        // sharing the output's "<name>." prefix (other than the output itself) is one of those.
+        private void DeleteYtDlpLeftovers(string outputPath)
+        {
+            var folder = Path.GetDirectoryName(outputPath);
+            if (folder == null || !Directory.Exists(folder))
+                return;
+
+            var outputName = Path.GetFileName(outputPath);
+            var prefix = Path.GetFileNameWithoutExtension(outputPath) + ".";
+            foreach (var file in Directory.EnumerateFiles(folder))
+            {
+                var name = Path.GetFileName(file);
+                if (name.StartsWith(prefix, StringComparison.Ordinal)
+                    && !string.Equals(name, outputName, StringComparison.Ordinal))
+                {
+                    TryDeleteFile(file);
+                }
+            }
         }
     }
 }

build.yaml

@@ -1,5 +1,5 @@
 ---
-version: 1.0.0.13
+version: 1.0.0.14
 name: CinemaTrailers4Jellyfins
 guid: b581493e-1046-40ed-b6dc-cb8027624984
 description: >
@@ -12,12 +12,9 @@ category: General
 owner: 514mart
 targetAbi: 10.11.0.0
 changelog:
-  - yt-dlp now prefers H.264 + AAC (plays or hardware-transcodes on every
+  - When yt-dlp fails part-way, its partial download files (.part, .ytdl,
-    client; VP9/AV1 often needed a CPU transcode) and uses Jellyfin's own
+    separate video/audio) are now deleted instead of being left in the
-    ffmpeg for the merge
+    trailer folder
-  - If yt-dlp fails, the built-in downloader is tried instead
-  - Fix a possible hang. yt-dlp's output is now read while it runs, so a
-    full output buffer can no longer block it
 
 dotnetProjects:
   - name: Jellyfin.Plugin.CinemaTrailers4Jellyfins