JianYing MCP

Instructions

Implementation Reference

• jianyingdraft/tool/audio_tool.py:17-101 (handler)

  The main handler function for the 'add_audio_segment' MCP tool. It validates inputs, resolves draft_id and track_name from track_id using index_manager, calls the audio service, and updates mappings.
  def add_audio_segment( track_id: str, material: str, target_start_end: str, source_start_end: Optional[str] = None, speed: Optional[float] = None, volume: float = 1.0, change_pitch: bool = False ) -> ToolResponse: """ 添加音频片段到指定轨道，须注意 target_start_end和 source_start_end 的使用规则 Args: track_id: 轨道ID，通过create_track获得 material: 音频文件路径，支持本地文件路径或URL target_start_end: 片段在轨道上的目标时间范围，格式如 "0s-4.2s",表示在轨道上从0s开始，持续4.2s，target_start_end参数描述的是轨道上的时间范围，同一轨道中不可有重复时间段，即0s-4.2s和4s-5s，第一段素材最后0.2s与第二段素材重叠了，只能是0s-4.2s和4.ss-5s source_start_end: 从源音频文件中截取的时间范围，格式如 "1s-4.2s"，表示从源音频的1s开始截取，到4.2s结束（可选），source_start_end参数描述的是素材本身取的时长，默认取全部时长，一般情况下不设置，除非用户说明，若素材时长为5s,用户需要取其中1s-5s的内容，才配置 speed: 播放速度，默认为1.0。此项与source_timerange同时指定时，将覆盖target_timerange中的时长（可选） volume: 音量，默认为1.0 change_pitch: 是否跟随变速改变音调，默认为False """ try: target_timerange = parse_start_end_format(target_start_end) except ValueError as e: return ToolResponse( success=False, message=f"target_start_end格式错误: {str(e)}" ) source_timerange = None if source_start_end is not None: try: source_timerange = parse_start_end_format(source_start_end) except ValueError as e: return ToolResponse( success=False, message=f"source_start_end格式错误: {str(e)}" ) # 参数验证 if speed is not None and speed <= 0: return ToolResponse( success=False, message=f"播放速度必须大于0，当前值: {speed}" ) if volume < 0: return ToolResponse( success=False, message=f"音量不能为负数，当前值: {volume}" ) # 通过track_id获取draft_id和track_name draft_id = index_manager.get_draft_id_by_track_id(track_id) track_name = index_manager.get_track_name_by_track_id(track_id) if not draft_id: return ToolResponse( success=False, message=f"未找到轨道ID对应的草稿: {track_id}" ) if not track_name: return ToolResponse( success=False, message=f"未找到轨道ID对应的轨道名: {track_id}" ) # 调用服务层处理业务逻辑 result = add_audio_segment_service( draft_id=draft_id, material=material, target_timerange=target_timerange, source_timerange=source_timerange, speed=speed, volume=volume, change_pitch=change_pitch, track_name=track_name ) # 如果音频片段添加成功，添加索引记录 if result.success and result.data and "audio_segment_id" in result.data: audio_segment_id = result.data["audio_segment_id"] index_manager.add_audio_segment_mapping(audio_segment_id, track_id) return result
• jianyingdraft/server.py:24-31 (registration)

  The server main function registers all tool groups by calling audio_tools(mcp) among others, which defines and registers the add_audio_segment tool.
  def main(): # 注册所有工具 draft_tools(mcp) track_tools(mcp) video_tools(mcp) text_tools(mcp) audio_tools(mcp) utility_tools(mcp)
• jianyingdraft/services/audio_service.py:11-97 (helper)

  Service function called by the tool handler. It creates an AudioSegment instance and invokes its add_audio_segment method, handles exceptions, and formats the ToolResponse.
  def add_audio_segment_service( draft_id: str, material: str, target_timerange: str, source_timerange: Optional[str] = None, speed: Optional[float] = None, volume: float = 1.0, change_pitch: bool = False, track_name: Optional[str] = None ) -> ToolResponse: """ 音频片段添加服务 - 创建音频片段 Args: draft_id: 草稿ID material: 音频文件路径，包括本地路径或者URL target_timerange: 片段在轨道上的目标时间范围，格式如 "0s-4.2s" source_timerange: 从源音频文件中截取的时间范围，格式如 "1s-5.2s"（可选） speed: 播放速度，默认为1.0（可选） volume: 音量，默认1.0 change_pitch: 是否跟随变速改变音调，默认False track_name: 指定的轨道名称（可选） Returns: ToolResponse: 包含操作结果的响应对象 """ try: # 创建AudioSegment实例 audio_segment = AudioSegment(draft_id, track_name=track_name) # 调用音频片段添加方法 result_data = audio_segment.add_audio_segment( material=material, target_timerange=target_timerange, source_timerange=source_timerange, speed=speed, volume=volume, change_pitch=change_pitch, track_name=track_name ) # 构建返回数据 response_data = { "audio_segment_id": audio_segment.audio_segment_id, "draft_id": draft_id, "material": material, "target_timerange": target_timerange, "volume": volume, "change_pitch": change_pitch, "add_audio_segment": result_data } # 添加可选参数到返回数据 if source_timerange: response_data["source_timerange"] = source_timerange if speed is not None: response_data["speed"] = speed if track_name: response_data["track_name"] = track_name return ToolResponse( success=True, message=f"音频片段添加成功: {material}", data=response_data ) except ValueError as e: # 处理参数错误 return ToolResponse( success=False, message=f"参数错误: {str(e)}" ) except NameError as e: # 处理轨道不存在错误 return ToolResponse( success=False, message=f"轨道错误: {str(e)}" ) except Exception as e: # 处理其他未预期的错误 return ToolResponse( success=False, message=f"音频片段添加失败: {str(e)}" )
• jianyingdraft/jianying/audio.py:41-138 (helper)

  Core implementation in AudioSegment class that parses parameters, downloads/validates material, builds the 'add_audio_segment' operation JSON structure, validates track and overlaps, and persists to audio.json file.
  def add_audio_segment(self, material: str, target_timerange: str, source_timerange: Optional[str] = None, speed: Optional[float] = None, volume: float = 1.0, change_pitch: bool = False, track_name: Optional[str] = None) -> Dict[str, Any]: """ 创建音频片段配置 Args: material: 音频文件路径,包括本地路径或者url target_timerange: 片段在轨道上的目标时间范围，格式如 "0s-4.2s",表示在轨道上从0s开始 source_timerange: 从源视频文件中截取的时间范围，格式如 "1s-4.2s",表示从源视频的1s开始截取，持续4.2s，默认从开头根据`speed`截取与`target_timerange`等长的一部分 speed: (`float`, optional): 播放速度, 默认为1.0，此项与`source_timerange`同时指定时, 将覆盖`target_timerange`中的时长 volume: 音量，默认1.0 change_pitch: 是否跟随变速改变音调，默认False，一般不修改 track_name: 指定的轨道名称（可选），如果不指定则使用实例的track_name """ # 生成音频片段ID audio_segment_id = str(uuid.uuid4()) # 解析target_timerange if not target_timerange or "-" not in target_timerange: raise ValueError(f"Invalid target_timerange format: {target_timerange}") start_str, duration_str = target_timerange.split("-", 1) target_timerange_data = { "start": start_str.strip(), "duration": duration_str.strip() } # 解析source_timerange（如果有） source_timerange_data = None if source_timerange is not None: # 解析source_timerange if "-" not in source_timerange: raise ValueError(f"Invalid source_timerange format: {source_timerange}") src_start_str, src_duration_str = source_timerange.split("-", 1) source_timerange_data = { "start": src_start_str.strip(), "duration": src_duration_str.strip() } # 确定使用的轨道名称（参数优先，然后是实例属性） final_track_name = track_name or self.track_name # 下载并验证素材，获取本地化路径 local_material_path = download_and_validate_material( self.draft_id, material, "audio", target_timerange_data ) # 构建add_audio_segment参数（使用本地化后的路径） add_audio_segment_params = { "material": local_material_path, # 使用本地化后的相对路径 "target_timerange": target_timerange_data } # 只添加用户明确传入的可选参数 if source_timerange_data is not None: add_audio_segment_params["source_timerange"] = source_timerange_data if speed is not None: add_audio_segment_params["speed"] = speed if volume != 1.0: # 只有非默认值才保存 add_audio_segment_params["volume"] = volume if change_pitch: # 只有True才保存 add_audio_segment_params["change_pitch"] = change_pitch # 验证轨道 if final_track_name: self._validate_track_for_audio(final_track_name) # 验证片段重叠 if final_track_name: validate_overlap(self.draft_id, "audio", final_track_name, target_timerange_data) # 构建完整的片段数据 segment_data = { "audio_segment_id": audio_segment_id, "operation": "add_audio_segment", "add_audio_segment": add_audio_segment_params, } return_data = { "draft_id": self.draft_id, "track_name": final_track_name, "audio_segment_id": audio_segment_id, "operation": "add_audio_segment", "add_audio_segment": add_audio_segment_params, } # 只在指定了轨道名称时才添加track_name字段 if final_track_name: segment_data["track_name"] = final_track_name # 保存参数 self.add_json_to_file(segment_data) self.audio_segment_id = audio_segment_id return return_data