Refactor FFmpeg file conversion logic and API

Unified file conversion in FFmpegAddonAdapter to use decodeAudioToFmt for all formats, updated FFmpeg interface and service to support new conversion method, and added adapter name checks in GetRecord and DownloadFileRecordStream for optimized conversion flow. Updated native addon binaries to support these changes.

src/common/ffmpeg-addon-adapter.ts

@@ -68,11 +68,13 @@ export class FFmpegAddonAdapter implements IFFmpegAdapter {
     const addon = this.ensureAddon();
     const info = await addon.getVideoInfo(videoPath, 'bmp24');
 
+    let format = info.format.includes(',') ? info.format.split(',')[0] ?? info.format : info.format;
+    console.log('[FFmpegAddonAdapter] Detected format:', format);
     return {
       width: info.width,
       height: info.height,
       duration: info.duration,
-      format: info.format,
+      format: format,
       thumbnail: info.image,
     };
   }
@@ -88,7 +90,7 @@ export class FFmpegAddonAdapter implements IFFmpegAdapter {
   /**
      * 转换为 PCM
      */
-  async convertToPCM (filePath: string, pcmPath: string): Promise<{ result: boolean, sampleRate: number }> {
+  async convertToPCM (filePath: string, pcmPath: string): Promise<{ result: boolean, sampleRate: number; }> {
     const addon = this.ensureAddon();
     const result = await addon.decodeAudioToPCM(filePath, pcmPath, 24000);
 
@@ -100,13 +102,8 @@ export class FFmpegAddonAdapter implements IFFmpegAdapter {
      */
   async convertFile (inputFile: string, outputFile: string, format: string): Promise<void> {
     const addon = this.ensureAddon();
-
-    if (format === 'silk' || format === 'ntsilk') {
-      // 使用 Addon 的 NTSILK 转换
-      await addon.convertToNTSilkTct(inputFile, outputFile);
-    } else {
-      throw new Error(`Format '${format}' is not supported by FFmpeg Addon`);
-    }
+    console.log('[FFmpegAddonAdapter] Converting file:', inputFile, 'to', outputFile, 'as', format);
+    await addon.decodeAudioToFmt(inputFile, outputFile, format);
   }
 
   /**

src/common/ffmpeg-addon.ts

@@ -49,23 +49,25 @@ export interface AudioPCMResult {
  * FFmpeg interface providing all audio/video processing methods
  */
 export interface FFmpeg {
+  convertFile (inputFile: string, outputFile: string, format: string): Promise<{ success: boolean; }>;
   /**
      * Get video information including resolution, duration, format, codec and first frame thumbnail
      */
-  getVideoInfo(filePath: string, format?: 'bmp' | 'bmp24'): Promise<VideoInfo>;
+  getVideoInfo (filePath: string, format?: 'bmp' | 'bmp24'): Promise<VideoInfo>;
 
   /**
      * Get duration of audio or video file in seconds
      */
-  getDuration(filePath: string): Promise<number>;
+  getDuration (filePath: string): Promise<number>;
 
   /**
      * Convert audio file to NTSILK format (WeChat voice message format)
      */
-  convertToNTSilkTct(inputPath: string, outputPath: string): Promise<void>;
+  convertToNTSilkTct (inputPath: string, outputPath: string): Promise<void>;
 
   /**
      * Decode audio file to raw PCM data
      */
-  decodeAudioToPCM(filePath: string, pcmPath: string, sampleRate?: number): Promise<{ result: boolean, sampleRate: number }>;
+  decodeAudioToPCM (filePath: string, pcmPath: string, sampleRate?: number): Promise<{ result: boolean, sampleRate: number; }>;
+  decodeAudioToFmt (filePath: string, pcmPath: string, format: string): Promise<{ channels: number; sampleRate: number; format: string; }>;
 }

src/common/ffmpeg.ts

@@ -48,6 +48,14 @@ export class FFmpegService {
     this.initialized = true;
   }
 
+  public static getAdapterName (): string {
+    if (!this.adapter) {
+      throw new Error('FFmpeg service not initialized. Please call FFmpegService.init() first.');
+    }
+    return this.adapter.name;
+
+  }
+
   /**
      * 获取 FFmpeg 适配器
      */

src/onebot/action/file/GetRecord.ts

@@ -7,7 +7,7 @@ import { FFmpegService } from '@/common/ffmpeg';
 const out_format = ['mp3', 'amr', 'wma', 'm4a', 'spx', 'ogg', 'wav', 'flac'];
 
 type Payload = {
-  out_format: string
+  out_format: string;
 } & GetFilePayload;
 
 export default class GetRecord extends GetFileBase {
@@ -28,8 +28,12 @@ export default class GetRecord extends GetFileBase {
         try {
           await fs.access(outputFile);
         } catch {
-          await this.decodeFile(inputFile, pcmFile);
-          await FFmpegService.convertFile(pcmFile, outputFile, payload.out_format);
+          if (FFmpegService.getAdapterName() === 'FFmpegAddon') {
+            await FFmpegService.convertFile(inputFile, outputFile, payload.out_format);
+          } else {
+            await this.decodeFile(inputFile, pcmFile);
+            await FFmpegService.convertFile(pcmFile, outputFile, payload.out_format);
+          }
         }
         const base64Data = await fs.readFile(outputFile, { encoding: 'base64' });
         res.file = outputFile;

src/onebot/action/stream/DownloadFileRecordStream.ts

@@ -47,8 +47,12 @@ export class DownloadFileRecordStream extends BaseDownloadStream<Payload, Downlo
           streamPath = outputFile;
         } catch {
           // 尝试解码 silk 到 pcm 再用 ffmpeg 转换
-          await this.decodeFile(downloadPath, pcmFile);
-          await FFmpegService.convertFile(pcmFile, outputFile, payload.out_format);
+          if (FFmpegService.getAdapterName() === 'FFmpegAddon') {
+            await FFmpegService.convertFile(downloadPath, outputFile, payload.out_format);
+          } else {
+            await this.decodeFile(downloadPath, pcmFile);
+            await FFmpegService.convertFile(pcmFile, outputFile, payload.out_format);
+          }
           streamPath = outputFile;
         }
       }