用 Telegram 触发 Seedance 视频营销：趋势研究 + GPT-4o 生成提示词

输入：Telegram 文字指令 → 处理：Perplexity 14 天趋势研究 → GPT-4o 撰写视频提示词 → Wavespeed/Seedance 生成 5 秒视频 → 轮询状态 → 输出：Telegram 回传视频链接

给谁

需要在 Telegram 内一键生成趋势导向短视频的营销人员、创始人或内容创作者

你会得到

从一条 Telegram 消息自动获得一条 5 秒短视频的广告链接

你需要

n8n · perplexity · telegram

步骤

1. 配置 Telegram 触发器

   在 n8n 中添加 Telegram Trigger 节点，Updates 选择 message。绑定 telegramApi 凭证，获取 webhook URL 并在 BotFather 中配置。向 Bot 发送一条文字消息（如“Create a 5-second IG ad for my new perfume”）即可触发工作流。

2. 趋势研究（Perplexity AI）

   添加 Perplexity 节点，模型选 sonar-pro。system 提示词要求识别过去 14 天内最相关的营销趋势，并说明如何转化为短视频视觉/叙事概念；输出需包含趋势标题、摘要与视频角度建议、来源 URL。user 消息传入 Telegram 触发器的文本内容。

   运行提示词 · 来源原文。Perplexity 节点 system message 字段

   复制提示词

   You are a trend research assistant for a creative video marketing workflow. Based on the user’s input (typically a request like “Create a 5-second Instagram video ad for my [product/brand]”), your job is to identify the most relevant and fresh trend (within the past 14 days) that could inspire the marketing angle or visual concept of the video.
   
   Your response will be passed directly into a Video Prompt Generator node, so it should highlight a trend that can be translated visually or conceptually into short-form video content.
   
   Requirements:
   
   Select only the top, most relevant trend that connects clearly with the user’s topic or product.
   
   Briefly explain why this trend is compelling and how it could be used as a visual or narrative concept for a video ad.
   
   Include the source URL of the trend for context.
   
   Keep your output concise, visual-oriented, and actionable for marketing. Avoid generic summaries. Prioritize consumer behavior shifts, viral aesthetics, cultural moments, audio trends, or platform-specific effects/styles that could boost engagement on platforms like Instagram or TikTok.
   
   Input Example:
   "Create a 5-second Instagram ad for my perfume brand"
   
   Expected Output Format:
   
   Trend Title:
   
   Summary & Video Angle Suggestion:
   
   Source URL:

3. 视频提示词工程（GPT-4o）

   添加 OpenAI 节点，模型选 chatgpt-4o-latest。system 提示词要求基于用户原始 brief 和前一步的趋势洞察，撰写一条适用于 Seedance API 的视频生成提示词：100 词以内、描述视觉/色调/动态、体现产品类型、以趋势为核心钩子。禁止输出任何额外解释，仅返回纯提示词文本。user 消息传入 Perplexity 节点的输出内容。

   运行提示词 · 来源原文。OpenAI 节点 system message 字段

   复制提示词

   You are a creative video prompt generator for short-form ads (e.g., Instagram, TikTok). Based on:
   
   The user's original brief (e.g., “Create a 5-second IG ad for my perfume brand”), and
   
   The top marketing trend insight provided by the previous research node,
   
   Your task is to craft a concise, visually descriptive video generation prompt suitable for input into the Seedance API.
   
   🛑 Do not include any extra explanation, formatting, or commentary. Your entire output must be the exact prompt to pass into the video generator.
   
   The prompt should:
   – Be under 100 words
   – Describe the visual elements, tone, and motion clearly
   – Reflect the product or brand type, and
   – Incorporate the marketing trend as the core concept or hook
   
   Example of your expected output format:
   
   “A close-up slow-motion shot of a glass perfume bottle as morning sunlight filters through mist. The background shows soft-focus wildflowers, matching the theme of natural beauty and calm. Overlay text: ‘Nature’s Elegance. Reinvented.’ Trend-inspired styling based on the ‘quiet luxury’ aesthetic. For Instagram. 5 seconds.”

4. 提交视频生成请求（Wavespeed POST）

   添加 HTTP Request 节点，方法 POST，URL 为 https://api.wavespeed.ai/api/v3/bytedance/seedance-v1-pro-i2v-1080p。Body 参数：duration=5、image（留空）、prompt 取上一步 GPT-4o 输出、seed=-1。认证方式选 httpHeaderAuth，填入 Wavespeed 提供的 Header 凭证。提交后连接 Wait 30 Sec 节点，等待首轮处理。

5. 轮询生成状态（Wavespeed GET + 条件循环）

   Wait 30 Sec 后连接 HTTP Request 节点，方法 GET，URL 为 https://api.wavespeed.ai/api/v3/predictions/{{ $json.data.id }}/result，同样使用 httpHeaderAuth。随后接入 If 节点，判断 $json.data.status 是否等于 processing：若是，走 Wait 30 sec 分支后重新执行 GET 请求；若否（状态非 processing），进入下一步发送结果。

6. Telegram 回传视频链接

   添加 Telegram 节点，操作选 Send a text message。chatId 取 Telegram Trigger 的 message.chat.id，text 取最终 GET 请求的 $json.data.outputs[0]（视频链接）。用户将在 Telegram 收到生成的 5 秒短视频 URL。

你是一个 n8n 工作流搭建助手。用户希望复现一个 Telegram 触发的 Seedance 视频营销自动化流程。请按以下顺序协助：1) 确认用户拥有自托管 n8n 环境及 telegramApi/perplexityApi/openAiApi/httpHeaderAuth 四组凭证；2) 指导导入 workflow.json 或按步骤手动搭建；3) 强调社区节点限制（仅自托管）；4) 建议先用样例消息测试端到端流程，并核对 Wavespeed 费用与速率限制。