Use default duration if getDuration fails

Add a fallback for video duration by including this.getDuration(videoPath).catch(() => 60) in the Promise.all alongside fileTypeFromFile. This prevents Promise.all from rejecting when duration retrieval fails and supplies a sensible default (60s) for downstream processing (e.g., thumbnail generation).

packages/napcat-core/helper/ffmpeg/ffmpeg-exec-adapter.ts

@@ -101,6 +101,7 @@ export class FFmpegExecAdapter implements IFFmpegAdapter {
     // 获取文件大小和类型
     const [fileType, duration] = await Promise.all([
       fileTypeFromFile(videoPath).catch(() => null),
+      this.getDuration(videoPath).catch(() => 60),
     ]);
 
     // 创建临时缩略图路径