refactor(video-from-script): 提取轮询重试逻辑为共享工具

提取三个视频生成器中重复的 `pollWithRetry` 函数到共享模块 `video-poll-utils`，消除代码重复。新增两层重试机制：轮询级（处理网络瞬断）和任务级（创建新任务 + 提示词优化）。同时优化 `phase-videos` 中视频状态管理和 manifest 保存逻辑。

.claude/skills/video-from-script/scripts/grok-video-generator.js

@@ -402,57 +402,28 @@ async function batchGenerate(tasks, options = {}) {
   return results
 }
 
-/**
- * 轮询 + 失败重试（单任务）
- */
+const { makePollWithRetry } = require('./lib/video-poll-utils')
+
+const pollWithRetryBase = makePollWithRetry({
+  Api: GrokApi,
+  suffix: '_grok',
+  duration: 6,
+  maxRetries: Config.maxRetries,
+  optimizePrompt: (prompt, failReason, attempt) => PromptOptimizer.optimize(prompt, failReason, attempt),
+  buildCreateOpts: (options) => ({ aspectRatio: options.aspectRatio, size: options.size }),
+})
+
 async function pollWithRetry(taskId, prompt, options = {}) {
-  let currentTaskId = taskId
-  let currentPrompt = prompt
-  let lastError = null
+  const result = await pollWithRetryBase(taskId, prompt, options)
 
-  for (let attempt = 0; attempt <= Config.maxRetries; attempt++) {
-    try {
-      if (attempt > 0) {
-        currentPrompt = PromptOptimizer.optimize(prompt, lastError, attempt)
-        console.log(`\n   🔄 重试 (任务 ${currentTaskId.substring(0, 8)}...): ${currentPrompt.substring(0, 50)}`)
-        currentTaskId = await GrokApi.create(
-          options.imageUrl || '',
-          currentPrompt,
-          { aspectRatio: options.aspectRatio, size: options.size }
-        )
-      }
-
-      const result = await GrokApi.poll(currentTaskId)
-
-      const timestamp = new Date().toISOString().replace(/[:.]/g, '-')
-      const videoFile = path.join(options.outputDir || './output', `${timestamp}_grok.mp4`)
-      await download(result.videoUrl, videoFile)
-
-      let thumbnailFile = null
-      if (result.thumbnailUrl) {
-        thumbnailFile = path.join(options.outputDir || './output', `${timestamp}_thumb.jpg`)
-        try { await download(result.thumbnailUrl, thumbnailFile) } catch (_) {}
-      }
-
-      return {
-        taskId: currentTaskId,
-        prompt: currentPrompt,
-        originalPrompt: prompt,
-        attempts: attempt + 1,
-        file: videoFile,
-        files: [videoFile],
-        duration: 6,
-        thumbnail: thumbnailFile,
-      }
-    } catch (err) {
-      lastError = err.message
-      if (attempt < Config.maxRetries) {
-        await new Promise(r => setTimeout(r, 5000))
-      }
-    }
+  let thumbnailFile = null
+  if (result.thumbnailUrl) {
+    const timestamp = new Date().toISOString().replace(/[:.]/g, '-')
+    thumbnailFile = path.join(options.outputDir || './output', `${timestamp}_thumb.jpg`)
+    try { await download(result.thumbnailUrl, thumbnailFile) } catch (_) {}
   }
 
-  throw new Error(`重试 ${Config.maxRetries} 次后仍失败: ${lastError}`)
+  return { ...result, thumbnail: thumbnailFile }
 }
 
 // ============================================================================

.claude/skills/video-from-script/scripts/kling-video-generator.js

@@ -503,51 +503,16 @@ async function batchGenerate(tasks, options = {}) {
   return results
 }
 
-/**
- * 轮询 + 失败重试（单任务）
- */
-async function pollWithRetry(taskId, prompt, options = {}) {
-  let currentTaskId = taskId
-  let currentPrompt = prompt
-  let lastError = null
+const { makePollWithRetry } = require('./lib/video-poll-utils')
 
-  for (let attempt = 0; attempt <= Config.maxRetries; attempt++) {
-    try {
-      if (attempt > 0) {
-        currentPrompt = PromptOptimizer.optimize(prompt, lastError, attempt)
-        console.log(`\n   🔄 重试 (任务 ${currentTaskId.substring(0, 8)}...): ${currentPrompt.substring(0, 50)}`)
-        currentTaskId = await KlingApi.create(
-          options.imageUrl || '',
-          currentPrompt,
-          { duration: options.duration, mode: options.mode, lastFrameUrl: options.lastFrameUrl || '' }
-        )
-      }
-
-      const result = await KlingApi.poll(currentTaskId)
-
-      const timestamp = new Date().toISOString().replace(/[:.]/g, '-')
-      const videoFile = path.join(options.outputDir || './output', `${timestamp}_kling.mp4`)
-      await download(result.videoUrl, videoFile)
-
-      return {
-        taskId: currentTaskId,
-        prompt: currentPrompt,
-        originalPrompt: prompt,
-        attempts: attempt + 1,
-        file: videoFile,
-        files: [videoFile],
-        duration: 6,
-      }
-    } catch (err) {
-      lastError = err.message
-      if (attempt < Config.maxRetries) {
-        await new Promise(r => setTimeout(r, 5000))
-      }
-    }
-  }
-
-  throw new Error(`重试 ${Config.maxRetries} 次后仍失败: ${lastError}`)
-}
+const pollWithRetry = makePollWithRetry({
+  Api: KlingApi,
+  suffix: '_kling',
+  duration: 6,
+  maxRetries: Config.maxRetries,
+  optimizePrompt: (prompt, failReason, attempt) => PromptOptimizer.optimize(prompt, failReason, attempt),
+  buildCreateOpts: (options) => ({ duration: options.duration, mode: options.mode, lastFrameUrl: options.lastFrameUrl || '' }),
+})
 
 // ============================================================================
 // CLI

.claude/skills/video-from-script/scripts/lib/phase-videos.js

@@ -5,7 +5,6 @@
  * 支持 task ID 恢复：中断后重跑时优先恢复已有任务
  */
 
-const fs = require('fs')
 const path = require('path')
 const { saveManifest, ensureDir, log, getManifestDir } = require('./pipeline-utils')
 
@@ -24,15 +23,15 @@ async function phaseVideos(manifest, manifestPath, options) {
   const videoCandidates = manifest.items.filter(it => {
     if (it.confirmed === false) return false
     if (!it.url || !it.videoPrompt) return false
-    if (['done', 'pending', 'failed'].includes(it.status)) return true
-    return false
+    return ['done', 'pending', 'failed'].includes(it.status)
   })
-  // 对重试 item 自动清理旧视频引用，无需 agent 手动删除
+
+  // 已有视频（本地或 OSS）且状态为 done 的跳过，其余清理后重新生成
   const items = []
   for (const it of videoCandidates) {
-    if (it.video) {
-      if (it.status === 'done') continue       // 已有视频且完成，跳过
-      delete it.video                           // pending/failed 但有旧 video → 清理重来
+    if (it.video || it.videoUrl) {
+      if (it.status === 'done') continue
+      delete it.video
       delete it.videoUrl
       delete it.videoDuration
       delete it.videoTaskId
@@ -70,7 +69,6 @@ async function phaseVideos(manifest, manifestPath, options) {
     }
   }
 
-  // 轮询恢复的任务
   if (recovered.length > 0) {
     log('videos', `尝试恢复 ${recovered.length} 个中断任务...`)
     await Promise.allSettled(
@@ -86,6 +84,7 @@ async function phaseVideos(manifest, manifestPath, options) {
           if (result.file) {
             item.video = path.relative(dir, result.file).replace(/\\/g, '/')
             item.videoDuration = result.duration
+            item.status = 'done'
             delete item.videoTaskId
             log('videos', `  item ${item.id} 恢复成功`)
           }
@@ -94,9 +93,9 @@ async function phaseVideos(manifest, manifestPath, options) {
           delete item.videoTaskId
           needSubmit.push(item)
         }
-        saveManifest(manifestPath, manifest)
       })
     )
+    saveManifest(manifestPath, manifest)
   }
 
   if (needSubmit.length === 0) { log('videos', '全部通过恢复完成'); return }
@@ -110,13 +109,9 @@ async function phaseVideos(manifest, manifestPath, options) {
     const batch = needSubmit.slice(i, i + concurrency)
     const batchResults = await Promise.allSettled(
       batch.map(async (item) => {
-        const images = item.lastFrameUrl
-          ? [item.url, item.lastFrameUrl]
-          : [item.url]
         const extraOpts = item.lastFrameUrl
           ? { aspectRatio: ratio, lastFrameUrl: item.lastFrameUrl, mode: 'pro' }
           : { aspectRatio: ratio }
-
         try {
           const taskId = await Api.create(item.url, item.videoPrompt, extraOpts)
           return { item, taskId, error: null }
@@ -169,14 +164,15 @@ async function phaseVideos(manifest, manifestPath, options) {
     if (val.ok && val.result.file) {
       val.item.video = path.relative(dir, val.result.file).replace(/\\/g, '/')
       val.item.videoDuration = val.result.duration
+      val.item.status = 'done'
       delete val.item.videoTaskId
     } else if (val.item) {
       val.item.status = 'failed'
       val.item.error = val.error || '视频生成未返回文件'
       delete val.item.videoTaskId
     }
-    saveManifest(manifestPath, manifest)
   }
+  saveManifest(manifestPath, manifest)
 
   // 上传视频到 OSS
   const { uploadFile } = require('../oss-upload')
@@ -192,11 +188,9 @@ async function phaseVideos(manifest, manifestPath, options) {
       } catch (err) {
         log('videos', `  ${item.video} 上传失败: ${err.message}`)
       }
-      saveManifest(manifestPath, manifest)
     }
+    saveManifest(manifestPath, manifest)
   }
-
-  saveManifest(manifestPath, manifest)
 }
 
 module.exports = { phaseVideos }

.claude/skills/video-from-script/scripts/lib/video-poll-utils.js

@@ -0,0 +1,85 @@
+/**
+ * 共享视频轮询重试工具
+ *
+ * 提供 pollWithRetry 工厂函数，供 kling/veo/grok 三个视频生成器共用。
+ * 两层重试：轮询级（同一 taskId，处理网络瞬断）→ 任务级（创建新 task + 优化提示词）
+ */
+
+const TRANSIENT_RE = /timeout|ECONNRESET|ETIMEDOUT|network|socket/i
+
+const POLL_RETRIES = 2      // 同一 task 轮询重试次数
+const POLL_RETRY_DELAY = 5000  // 轮询重试间隔 ms
+const TASK_RETRY_DELAY = 5000  // 任务级重试间隔 ms
+
+function isTransientError(err) {
+  return TRANSIENT_RE.test(err.message || '')
+}
+
+/**
+ * 创建 pollWithRetry 函数
+ *
+ * @param {object} opts
+ * @param {object} opts.Api - 有 create() 和 poll() 方法的 API 对象
+ * @param {string} opts.suffix - 输出文件后缀（如 '_kling'）
+ * @param {number} opts.duration - 视频时长（秒）
+ * @param {number} [opts.maxRetries=3] - 任务级最大重试次数
+ * @param {function} [opts.optimizePrompt] - 提示词优化函数 (prompt, failReason, attempt) => optimizedPrompt
+ * @param {function} opts.buildCreateOpts - (item_options) => create() 的第三个参数
+ * @returns {function} pollWithRetry(taskId, prompt, options)
+ */
+function makePollWithRetry({ Api, suffix, duration, maxRetries = 3, optimizePrompt, buildCreateOpts }) {
+  return async function pollWithRetry(taskId, prompt, options = {}) {
+    let currentTaskId = taskId
+    let currentPrompt = prompt
+    let lastError = null
+
+    for (let attempt = 0; attempt <= maxRetries; attempt++) {
+      if (attempt > 0) {
+        if (optimizePrompt) {
+          currentPrompt = optimizePrompt(prompt, lastError, attempt)
+        }
+        console.log(`\n   🔄 重试 (任务 ${currentTaskId.substring(0, 8)}...): ${currentPrompt.substring(0, 50)}`)
+        const createOpts = buildCreateOpts(options)
+        currentTaskId = await Api.create(options.imageUrl || '', currentPrompt, createOpts)
+      }
+
+      const outputDir = options.outputDir || './output'
+
+      for (let pollAttempt = 0; pollAttempt <= POLL_RETRIES; pollAttempt++) {
+        try {
+          const result = await Api.poll(currentTaskId)
+
+          const timestamp = new Date().toISOString().replace(/[:.]/g, '-')
+          const videoFile = path.join(outputDir, `${timestamp}${suffix}.mp4`)
+          await download(result.videoUrl, videoFile)
+
+          return {
+            taskId: currentTaskId,
+            prompt: currentPrompt,
+            originalPrompt: prompt,
+            attempts: attempt + 1,
+            file: videoFile,
+            files: [videoFile],
+            duration,
+          }
+        } catch (err) {
+          lastError = err.message
+          if (isTransientError(err) && pollAttempt < POLL_RETRIES) {
+            console.log(`   ⚠ 轮询瞬断 (${pollAttempt + 1}/${POLL_RETRIES}): ${err.message.slice(0, 60)}`)
+            await new Promise(r => setTimeout(r, POLL_RETRY_DELAY))
+            continue
+          }
+          break
+        }
+      }
+
+      if (attempt < maxRetries) {
+        await new Promise(r => setTimeout(r, TASK_RETRY_DELAY))
+      }
+    }
+
+    throw new Error(`重试 ${maxRetries} 次后仍失败: ${lastError}`)
+  }
+}
+
+module.exports = { makePollWithRetry, POLL_RETRIES, POLL_RETRY_DELAY, TASK_RETRY_DELAY }

.claude/skills/video-from-script/scripts/veo-video-generator.js

@@ -406,51 +406,16 @@ async function batchGenerate(tasks, options = {}) {
   return results
 }
 
-/**
- * 轮询 + 失败重试（单任务）
- */
-async function pollWithRetry(taskId, prompt, options = {}) {
-  let currentTaskId = taskId
-  let currentPrompt = prompt
-  let lastError = null
+const { makePollWithRetry } = require('./lib/video-poll-utils')
 
-  for (let attempt = 0; attempt <= Config.maxRetries; attempt++) {
-    try {
-      if (attempt > 0) {
-        currentPrompt = PromptOptimizer.optimize(prompt, lastError, attempt)
-        console.log(`\n   🔄 重试 (任务 ${currentTaskId.substring(0, 8)}...): ${currentPrompt.substring(0, 50)}`)
-        currentTaskId = await VeoApi.create(
-          options.imageUrl || '',
-          currentPrompt,
-          { aspectRatio: options.aspectRatio, lastFrameUrl: options.lastFrameUrl || '' }
-        )
-      }
-
-      const result = await VeoApi.poll(currentTaskId)
-
-      const timestamp = new Date().toISOString().replace(/[:.]/g, '-')
-      const videoFile = path.join(options.outputDir || './output', `${timestamp}_veo.mp4`)
-      await download(result.videoUrl, videoFile)
-
-      return {
-        taskId: currentTaskId,
-        prompt: currentPrompt,
-        originalPrompt: prompt,
-        attempts: attempt + 1,
-        file: videoFile,
-        files: [videoFile],
-        duration: 8,
-      }
-    } catch (err) {
-      lastError = err.message
-      if (attempt < Config.maxRetries) {
-        await new Promise(r => setTimeout(r, 5000))
-      }
-    }
-  }
-
-  throw new Error(`重试 ${Config.maxRetries} 次后仍失败: ${lastError}`)
-}
+const pollWithRetry = makePollWithRetry({
+  Api: VeoApi,
+  suffix: '_veo',
+  duration: 8,
+  maxRetries: Config.maxRetries,
+  optimizePrompt: (prompt, failReason, attempt) => PromptOptimizer.optimize(prompt, failReason, attempt),
+  buildCreateOpts: (options) => ({ aspectRatio: options.aspectRatio, lastFrameUrl: options.lastFrameUrl || '' }),
+})
 
 // ============================================================================
 // CLI