feat: complete implementation using gemini as analyzer

src/StreamShorts.Library/Media/IVideoService.cs

@@ -12,14 +12,21 @@ internal interface IVideoService
   /// <param name="audio">The output audio stream.</param>
   /// <returns>A task that represents the asynchronous operation. The task result indicates whether the extraction was successful.</returns>
   Task<bool> ExtractAudioFromVideoAsync(Stream video, Stream audio);
-
+  
   /// <summary>
-  /// Extracts a clip from a video stream.
+  /// Creates a clip from a video file based on the specified start and end times.
   /// </summary>
-  /// <param name="video">The input video stream.</param>
-  /// <param name="start">The start time of the clip.</param>
-  /// <param name="end">The end time of the clip.</param>
-  /// <param name="buffer">The duration of the buffer to include before the start time and after the end time.</param>
-  /// <returns>A task that represents the asynchronous operation. The task result contains the extracted clip as a stream.</returns>
-  Task<Stream> ExtractClipFromVideoAsync(Stream video, TimeSpan start, TimeSpan end, TimeSpan? buffer = null);
+  /// <param name="sourcePath">The path to the source video file.</param>
+  /// <param name="destinationPath">The path where the created clip will be saved.</param>
+  /// <param name="startTime">The start time of the clip.</param>
+  /// <param name="endTime">The end time of the clip.</param>
+  /// <param name="buffer">An optional buffer time to include before and after the clip segment.</param>
+  /// <returns>A task that represents the asynchronous operation.</returns>
+  Task CreateClipFromVideoAsync(
+    string sourcePath,
+    string destinationPath,
+    TimeSpan startTime,
+    TimeSpan endTime,
+    TimeSpan? buffer = null
+  );
 }