chore: improve mediainfo no video file error (#742)

server/routes/api/torrents.ts

@@ -918,10 +918,7 @@ router.get<{hash: string}>(
         return res.status(404).json({code, message});
       }
 
-      const mediainfoProcess = childProcess.execFile(
-        'mediainfo',
-        torrentContentPaths
-          .filter((x) => {
+      const args = torrentContentPaths.filter((x) => {
         const fn = x.toLowerCase();
         for (const ext of ['.mp4', '.mkv', '.ts', '.avi', '.rmvb', '.dat', '.wmv', '.iso']) {
           if (fn.endsWith(ext)) {
@@ -929,8 +926,18 @@ router.get<{hash: string}>(
           }
         }
         return false;
-          })
-          .map((x) => path.relative(torrentDirectory, x)),
+      });
+
+      if (args.length < 1) {
+        return res.status(200).json({
+          output:
+            'no video file found.\nIf this is a error, please create a issue at https://github.com/jesec/flood/issues',
+        });
+      }
+
+      const mediainfoProcess = childProcess.execFile(
+        'mediainfo',
+        args.map((x) => path.relative(torrentDirectory, x)),
         {maxBuffer: 1024 * 2000, timeout: 1000 * 10, cwd: torrentDirectory},
         (error, stdout) => {
           if (error) {