gen_video 接口文档 #

const generateVideo = async (draftUrl) => {
  const response = await fetch('/openapi/capcut-mate/v1/gen_video', {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({ draft_url: draftUrl })
  });
  return response.json();
};

// 基本使用
const draftUrl = "https://capcut-mate.jcaigc.cn/openapi/capcut-mate/v1/get_draft?draft_id=2025092811473036584258";
const result = await generateVideo(draftUrl);

if (result.video_url) {
  console.log('视频生成成功:', result.video_url);
  
  // 创建下载链接
  const downloadLink = document.createElement('a');
  downloadLink.href = result.video_url;
  downloadLink.download = 'generated_video.mp4';
  downloadLink.click();
} else {
  console.error('视频生成失败:', result.message);
}

class VideoGenerator {
  constructor(baseUrl = 'https://capcut-mate.jcaigc.cn') {
    this.baseUrl = baseUrl;
  }

  async generateVideo(draftUrl, options = {}) {
    const {
      timeout = 300000, // 5分钟超时
      onProgress = null
    } = options;

    const controller = new AbortController();
    const timeoutId = setTimeout(() => controller.abort(), timeout);

    try {
      const response = await fetch(`${this.baseUrl}/openapi/capcut-mate/v1/gen_video`, {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ draft_url: draftUrl }),
        signal: controller.signal
      });

      clearTimeout(timeoutId);

      if (!response.ok) {
        throw new Error(`视频生成失败: ${response.statusText}`);
      }

      return response.json();
    } catch (error) {
      clearTimeout(timeoutId);
      if (error.name === 'AbortError') {
        throw new Error('视频生成超时');
      }
      throw error;
    }
  }

  // 轮询式视频生成（适用于长时间处理）
  async generateVideoWithPolling(draftUrl, options = {}) {
    const {
      pollInterval = 5000, // 5秒轮询间隔
      maxAttempts = 60, // 最大尝试次数（5分钟）
      onProgress = null
    } = options;

    // 启动生成请求
    let attempt = 0;
    
    while (attempt < maxAttempts) {
      try {
        const result = await this.generateVideo(draftUrl, { timeout: 30000 });
        
        if (result.video_url) {
          if (onProgress) onProgress({ status: 'completed', result });
          return result;
        }
        
        if (onProgress) {
          onProgress({ 
            status: 'processing', 
            attempt: attempt + 1, 
            maxAttempts,
            message: result.message 
          });
        }
        
        // 等待下次轮询
        await new Promise(resolve => setTimeout(resolve, pollInterval));
        attempt++;
        
      } catch (error) {
        if (error.message.includes('超时')) {
          // 超时不算失败，继续轮询
          if (onProgress) {
            onProgress({ 
              status: 'processing', 
              attempt: attempt + 1, 
              maxAttempts,
              message: '处理中...' 
            });
          }
          await new Promise(resolve => setTimeout(resolve, pollInterval));
          attempt++;
        } else {
          throw error;
        }
      }
    }
    
    throw new Error('视频生成超时，请稍后重试');
  }

  // 批量生成视频
  async generateBatchVideos(draftUrls, options = {}) {
    const {
      concurrent = 2, // 并发数量
      onProgress = null
    } = options;

    const results = {};
    const entries = Object.entries(draftUrls);
    
    // 分批处理
    for (let i = 0; i < entries.length; i += concurrent) {
      const batch = entries.slice(i, i + concurrent);
      
      const batchPromises = batch.map(async ([name, url]) => {
        try {
          if (onProgress) {
            onProgress({ name, status: 'starting', url });
          }
          
          const result = await this.generateVideoWithPolling(url, {
            onProgress: (progress) => {
              if (onProgress) {
                onProgress({ name, ...progress, url });
              }
            }
          });
          
          results[name] = result;
          
          if (onProgress) {
            onProgress({ name, status: 'completed', result, url });
          }
          
        } catch (error) {
          console.error(`生成视频失败 ${name}:`, error);
          results[name] = { error: error.message };
          
          if (onProgress) {
            onProgress({ name, status: 'failed', error: error.message, url });
          }
        }
      });
      
      await Promise.all(batchPromises);
      
      // 批次间添加延迟
      if (i + concurrent < entries.length) {
        await new Promise(resolve => setTimeout(resolve, 1000));
      }
    }
    
    return results;
  }

  // 下载生成的视频
  async downloadVideo(videoUrl, filename = 'generated_video.mp4') {
    try {
      const response = await fetch(videoUrl);
      const blob = await response.blob();
      
      const downloadUrl = window.URL.createObjectURL(blob);
      const link = document.createElement('a');
      link.href = downloadUrl;
      link.download = filename;
      
      document.body.appendChild(link);
      link.click();
      document.body.removeChild(link);
      
      window.URL.revokeObjectURL(downloadUrl);
      
      return true;
    } catch (error) {
      console.error('下载视频失败:', error);
      return false;
    }
  }
}

// 使用示例
const videoGenerator = new VideoGenerator();

// 单个视频生成
const draftUrl = "https://capcut-mate.jcaigc.cn/openapi/capcut-mate/v1/get_draft?draft_id=2025092811473036584258";

try {
  const result = await videoGenerator.generateVideoWithPolling(draftUrl, {
    onProgress: (progress) => {
      console.log(`生成进度: ${progress.status}`, progress);
      
      if (progress.status === 'processing') {
        console.log(`正在处理... (${progress.attempt}/${progress.maxAttempts})`);
      }
    }
  });
  
  console.log('视频生成成功:', result.video_url);
  
  // 下载视频
  await videoGenerator.downloadVideo(result.video_url, 'my_video.mp4');
  
} catch (error) {
  console.error('生成失败:', error);
}

// 批量生成视频
const multipleDrafts = {
  "video1": "https://capcut-mate.jcaigc.cn/openapi/capcut-mate/v1/get_draft?draft_id=2025092811473036584258",
  "video2": "https://capcut-mate.jcaigc.cn/openapi/capcut-mate/v1/get_draft?draft_id=2025092811473036584258",
  "video3": "https://capcut-mate.jcaigc.cn/openapi/capcut-mate/v1/get_draft?draft_id=2025092811473036584258"
};

const batchResults = await videoGenerator.generateBatchVideos(multipleDrafts, {
  concurrent: 2,
  onProgress: (progress) => {
    console.log(`${progress.name}: ${progress.status}`);
  }
});

console.log('批量生成结果:', batchResults);

// 下载所有成功的视频
for (const [name, result] of Object.entries(batchResults)) {
  if (result.video_url && !result.error) {
    await videoGenerator.downloadVideo(result.video_url, `${name}.mp4`);
  }
}