fix : 修复ffmpeg_media_concat使用的音频数据格式 fltp -> s16以确保aac音频编码的可用性

src/BowongModalFunctions/utils/VideoUtils.py

@@ -686,7 +686,9 @@ class VideoUtils:
                     f"pad={target_width}:{target_height}:(ow-iw)/2:(oh-ih)/2,"
                     f"setsar=1:1,"  # 新增强制设置SAR
                     f"fps=30,format=yuv420p[v{i}]",
-                    f"[{i}:a]aformat=sample_fmts=fltp:sample_rates=44100:channel_layouts=stereo[a{i}]",
+                    # 修改音频过滤器，确保输出为AAC兼容格式
+                    # f"[{i}:a]aformat=sample_fmts=fltp:sample_rates=44100:channel_layouts=stereo[a{i}]",
+                    f"[{i}:a]aformat=sample_fmts=s16:sample_rates=44100:channel_layouts=stereo[a{i}]",
                 ]
             )
         # 3. 准备处理后的视频流和音频流的连接字符串