extract_douyin_text
Extract text content from Douyin (TikTok) videos using share links, supporting optional speech recognition models for transcription.
Instructions
从抖音分享链接提取视频中的文本内容
参数:
- share_link: 抖音分享链接或包含链接的文本
- model: 语音识别模型（可选，默认使用paraformer-v2）
返回:
- 提取的文本内容
注意: 需要设置环境变量 DASHSCOPE_API_KEYInput Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| share_link | Yes | ||
| model | No |
Implementation Reference
- douyin_mcp_server/server.py:123-163 (handler)The main async handler function for the 'extract_douyin_text' MCP tool. It decorates with @mcp.tool() for registration, defines input schema via type hints and docstring, parses the share link using DouyinProcessor, and calls extract_text_from_video_url on the video URL.
@mcp.tool() async def extract_douyin_text( share_link: str, model: Optional[str] = None, ctx: Context = None ) -> str: """ 从抖音分享链接提取视频中的文本内容 参数: - share_link: 抖音分享链接或包含链接的文本 - model: 语音识别模型（可选，默认使用paraformer-v2） 返回: - 提取的文本内容 注意: 需要设置环境变量 DASHSCOPE_API_KEY """ try: # 从环境变量获取API密钥 api_key = os.getenv('DASHSCOPE_API_KEY') if not api_key: raise ValueError("未设置环境变量 DASHSCOPE_API_KEY，请在配置中添加阿里云百炼API密钥") processor = DouyinProcessor(api_key, model) # 解析视频链接 ctx.info("正在解析抖音分享链接...") video_info = processor.parse_share_url(share_link) # 直接使用视频URL进行文本提取 ctx.info("正在从视频中提取文本...") text_content = processor.extract_text_from_video_url(video_info['url']) ctx.info("文本提取完成!") return text_content except Exception as e: ctx.error(f"处理过程中出现错误: {str(e)}") raise Exception(f"提取抖音视频文本失败: {str(e)}") - Core helper function that performs the actual text extraction from the video URL using Dashscope's audio ASR Transcription API (async_call and wait). This is the key implementation logic for speech-to-text.
def extract_text_from_video_url(self, video_url: str) -> str: """从视频URL中提取文字（使用阿里云百炼API）""" try: # 发起异步转录任务 task_response = dashscope.audio.asr.Transcription.async_call( model=self.model, file_urls=[video_url], language_hints=['zh', 'en'] ) # 等待转录完成 transcription_response = dashscope.audio.asr.Transcription.wait( task=task_response.output.task_id ) if transcription_response.status_code == HTTPStatus.OK: # 获取转录结果 for transcription in transcription_response.output['results']: url = transcription['transcription_url'] result = json.loads(urlrequest.urlopen(url).read().decode('utf8')) # 保存结果到临时文件 temp_json_path = self.temp_dir / 'transcription.json' with open(temp_json_path, 'w') as f: json.dump(result, f, indent=4, ensure_ascii=False) # 提取文本内容 if 'transcripts' in result and len(result['transcripts']) > 0: return result['transcripts'][0]['text'] else: return "未识别到文本内容" else: raise Exception(f"转录失败: {transcription_response.output.message}") except Exception as e: raise Exception(f"提取文字时出错: {str(e)}") - Helper function in DouyinProcessor class that parses the Douyin share link, extracts video ID, scrapes the page for JSON data, and returns the no-watermark video URL along with caption and title. Called by the handler to obtain the video_url.
def parse_share_url(self, share_text: str) -> Dict[str, str]: """从分享文本中提取无水印视频链接""" import time start_time = time.time() # 提取分享链接 urls = re.findall(r'http[s]?://(?:[a-zA-Z]|[0-9]|[$-_@.&+]|[!*\(\),]|(?:%[0-9a-fA-F][0-9a-fA-F]))+', share_text) if not urls: raise ValueError("未找到有效的分享链接") share_url = urls[0] logger.debug(f"[抖音视频] 提取到的链接: {share_url}") t1 = time.time() share_response = requests.get(share_url, headers=HEADERS, timeout=10, allow_redirects=True) logger.debug(f"[抖音视频] 短链接重定向耗时: {time.time()-t1:.2f}秒") video_id = share_response.url.split("?")[0].strip("/").split("/")[-1] logger.debug(f"[抖音视频] 视频ID: {video_id}") share_url = f'https://www.iesdouyin.com/share/video/{video_id}' # 获取视频页面内容 t2 = time.time() response = requests.get(share_url, headers=HEADERS, timeout=10) response.raise_for_status() logger.debug(f"[抖音视频] 页面请求耗时: {time.time()-t2:.2f}秒") pattern = re.compile( pattern=r"window\._ROUTER_DATA\s*=\s*(.*?)</script>", flags=re.DOTALL, ) find_res = pattern.search(response.text) if not find_res or not find_res.group(1): raise ValueError("从HTML中解析视频信息失败") # 解析JSON数据 json_data = json.loads(find_res.group(1).strip()) VIDEO_ID_PAGE_KEY = "video_(id)/page" NOTE_ID_PAGE_KEY = "note_(id)/page" if VIDEO_ID_PAGE_KEY in json_data["loaderData"]: original_video_info = json_data["loaderData"][VIDEO_ID_PAGE_KEY]["videoInfoRes"] elif NOTE_ID_PAGE_KEY in json_data["loaderData"]: original_video_info = json_data["loaderData"][NOTE_ID_PAGE_KEY]["videoInfoRes"] else: raise Exception("无法从JSON中解析视频或图集信息") data = original_video_info["item_list"][0] # 检查是否为图文笔记 if "images" in data and data["images"]: raise ValueError("这是图文笔记，请使用 parse_image_note 方法") # 检查是否有视频 if "video" not in data or not data.get("video"): raise ValueError("未找到视频信息") # 获取视频信息（去水印：playwm -> play） video_url = data["video"]["play_addr"]["url_list"][0].replace("playwm", "play") raw_desc = data.get("desc", "").strip() if not raw_desc: raw_desc = f"douyin_{video_id}" # 替换文件名中的非法字符，仅用于文件命名 safe_title = re.sub(r'[\\/:*?"<>|]', '_', raw_desc) total_time = time.time() - start_time logger.debug(f"[抖音视频] 解析完成，总耗时: {total_time:.2f}秒") logger.debug(f"{'='*60}\n") return { "url": video_url, "title": safe_title, "caption": raw_desc, "video_id": video_id } - douyin_mcp_server/server.py:285-287 (registration)Tool listing in the watermark_removal_guide prompt, describing the extract_douyin_text tool.
### 特殊功能 - `extract_douyin_text`: 从抖音视频中提取语音文本内容（需要 API 密钥）