优化视频提炼

core/backend/apps/ai/test_video_digest.py

@@ -340,6 +340,27 @@ class VideoDigestApiTests(TestCase):
         self.assertEqual(response.status_code, 202)
         self.assertEqual(mocked.call_args.kwargs["model_config_id"], "abc-123")
 
+    def test_forwards_reuse_task_id_without_file(self):
+        payload = {
+            "id": "00000000-0000-0000-0000-000000000003",
+            "task_id": "00000000-0000-0000-0000-000000000003",
+            "status": "processing",
+            "text": "",
+            "duration": 15.0,
+            "file_name": "参考视频.mp4",
+            "estimated_cost": "30",
+        }
+        with patch("apps.ai.video_digest.submit_team_digest", return_value=payload) as mocked:
+            response = self.client.post(
+                "/api/ai/video-digest/",
+                {"reuse_task_id": "00000000-0000-0000-0000-000000000099", "model_config_id": "abc-123"},
+                format="json",
+            )
+        self.assertEqual(response.status_code, 202)
+        self.assertEqual(mocked.call_args.kwargs["reuse_task_id"], "00000000-0000-0000-0000-000000000099")
+        self.assertIsNone(mocked.call_args.kwargs["upload"])
+        self.assertEqual(mocked.call_args.kwargs["model_config_id"], "abc-123")
+
     def test_provider_failure_returns_json_not_500(self):
         with patch("apps.ai.video_digest.submit_team_digest", side_effect=RuntimeError("upstream 402")):
             upload = SimpleUploadedFile("ref.mp4", b"x", content_type="video/mp4")
@@ -387,6 +408,9 @@ class VideoDigestApiTests(TestCase):
                 "shot_count": 5,
                 "video_url": "https://cdn.example/coffee.mp4",
                 "cover_url": "https://cdn.example/coffee.jpg",
+                "source_key": f"digest-source-{extra_key or 'ok'}.mp4",
+                "source_url": "https://cdn.example/coffee-source.mp4",
+                "suffix": ".mp4",
             },
             response_payload={"digest": prompt, "prompt": prompt},
             is_deleted=is_deleted,
@@ -503,6 +527,31 @@ class VideoDigestApiTests(TestCase):
         missing = self.client.get("/api/ai/video-digest/00000000-0000-0000-0000-000000000099/")
         self.assertEqual(missing.status_code, 404)
 
+    def test_cancel_inflight_job(self):
+        from apps.ai.models import AITask
+
+        task = self._seed_digest_task(status=AITask.Status.RESERVED, extra_key="cancel")
+        response = self.client.delete(f"/api/ai/video-digest/{task.id}/")
+        self.assertEqual(response.status_code, 200)
+        self.assertEqual(response.data["status"], "cancelled")
+        task.refresh_from_db()
+        self.assertEqual(task.status, AITask.Status.CANCELLED)
+
+    def test_stale_inflight_is_auto_cancelled_on_list(self):
+        from datetime import timedelta
+
+        from django.utils import timezone
+
+        from apps.ai.models import AITask
+
+        task = self._seed_digest_task(status=AITask.Status.RESERVED, extra_key="stale")
+        AITask.objects.filter(id=task.id).update(created_at=timezone.now() - timedelta(minutes=20))
+        listed = self.client.get("/api/ai/video-digest/")
+        self.assertEqual(listed.status_code, 200)
+        self.assertIsNone(listed.data["inflight"])
+        task.refresh_from_db()
+        self.assertEqual(task.status, AITask.Status.CANCELLED)
+
 
 @override_settings(CACHES={"default": {"BACKEND": "django.core.cache.backends.locmem.LocMemCache"}})
 class VideoDigestBillingTests(TestCase):

core/backend/apps/ai/video_digest.py

@@ -19,6 +19,7 @@ import subprocess
 import tempfile
 import uuid
 from dataclasses import dataclass
+from datetime import timedelta
 from functools import lru_cache
 from pathlib import Path
 
@@ -760,6 +761,8 @@ def serialize_digest_job(task) -> dict:
         job_status = "processing"
     elif task.status == AITask.Status.SUCCEEDED:
         job_status = "succeeded"
+    elif task.status == AITask.Status.CANCELLED:
+        job_status = "cancelled"
     else:
         job_status = "failed"
     duration = float(req.get("duration_seconds") or 0)
@@ -805,6 +808,81 @@ def get_team_digest_job(*, team, task_id) -> dict | None:
     return serialize_digest_job(task)
 
 
+_STALE_DIGEST = timedelta(minutes=15)
+
+
+def _task_reservation(task):
+    try:
+        return task.credit_reservation
+    except Exception:  # noqa: BLE001 — 无预留行
+        return None
+
+
+def cancel_team_digest(*, team, task_id, reason: str = "用户取消") -> dict | None:
+    """取消进行中的提炼:停 UI 轮询、退预留积分。worker 跑到一半会看见 CANCELLED 不再落成功。"""
+    from django.db import transaction
+    from django.utils import timezone
+
+    from apps.ai.models import AITask
+    from apps.billing.services.ledger import release_credit
+
+    with transaction.atomic():
+        task = (
+            AITask.objects.select_for_update()
+            .filter(
+                id=task_id,
+                team=team,
+                task_type=AITask.Type.VIDEO_DIGEST,
+                project__isnull=True,
+                is_deleted=False,
+                purged_at__isnull=True,
+            )
+            .first()
+        )
+        if task is None:
+            return None
+        if task.status == AITask.Status.SUCCEEDED:
+            return serialize_digest_job(task)
+        if task.status in {AITask.Status.FAILED, AITask.Status.CANCELLED}:
+            return serialize_digest_job(task)
+        reservation = _task_reservation(task)
+        task.status = AITask.Status.CANCELLED
+        task.error_message = (reason or "用户取消")[:2000]
+        task.completed_at = timezone.now()
+        task.save(update_fields=["status", "error_message", "completed_at", "updated_at"])
+    if reservation is not None:
+        try:
+            release_credit(reservation=reservation, reason=(reason or "用户取消")[:200])
+        except Exception:  # noqa: BLE001
+            logger.warning("cancel digest release_credit failed for %s", task_id, exc_info=True)
+    return serialize_digest_job(task)
+
+
+def expire_stale_team_digests(*, team) -> None:
+    """卡住超过 15 分钟的提炼自动取消并退费,避免进页永远「正在拆解」。"""
+    from django.utils import timezone
+
+    from apps.ai.models import AITask
+
+    stale = AITask.objects.filter(
+        team=team,
+        task_type=AITask.Type.VIDEO_DIGEST,
+        project__isnull=True,
+        is_deleted=False,
+        purged_at__isnull=True,
+        status__in={
+            AITask.Status.CREATED,
+            AITask.Status.RESERVED,
+            AITask.Status.SUBMITTED,
+            AITask.Status.POLLING,
+            AITask.Status.POSTPROCESSING,
+        },
+        created_at__lt=timezone.now() - _STALE_DIGEST,
+    )
+    for task in stale:
+        cancel_team_digest(team=team, task_id=task.id, reason="提炼超时已自动取消")
+
+
 def get_inflight_team_digest(*, team) -> dict | None:
     from apps.ai.models import AITask
 
@@ -831,8 +909,11 @@ def get_inflight_team_digest(*, team) -> dict | None:
     return serialize_digest_job(task)
 
 
-def submit_team_digest(*, team, user, upload, model_config_id=None) -> dict:
+def submit_team_digest(*, team, user, upload=None, reuse_task_id=None, model_config_id=None) -> dict:
-    """秒回任务 id。慢活(抽帧 + Gemini)交给 worker,离开页面也不中断。"""
+    """秒回任务 id。慢活(抽帧 + Gemini)交给 worker,离开页面也不中断。
+
+    取消后再点生成时,可带 reuse_task_id 复用 TOS 上已有的参考视频,不用重新上传。
+    """
     from django.db import transaction
 
     from apps.ai.models import AITask
@@ -844,6 +925,7 @@ def submit_team_digest(*, team, user, upload, model_config_id=None) -> dict:
     if model_config is None:
         raise VideoDigestError("视频提炼需要 Gemini 3.1 Pro(会看图),当前没有启用,请联系管理员")
 
+    if upload is not None:
         path, suffix, size, duration = _materialize_upload(upload)
         file_name = Path(getattr(upload, "name", "") or "参考视频.mp4").name or "参考视频.mp4"
         width = height = 0
@@ -856,8 +938,6 @@ def submit_team_digest(*, team, user, upload, model_config_id=None) -> dict:
             Path(path).unlink(missing_ok=True)
         if not source_key:
             raise VideoDigestError("参考视频上传失败，请重试")
-
-    quote = quote_video_digest(team=team, model_config=model_config)
         request_payload = {
             "model": model_config.name,
             "endpoint": model_config.endpoint,
@@ -875,8 +955,16 @@ def submit_team_digest(*, team, user, upload, model_config_id=None) -> dict:
             "cover_key": cover_key,
             "cover_url": cover_url,
         }
+    else:
+        request_payload = _payload_from_existing_source(
+            team=team,
+            reuse_task_id=reuse_task_id,
+            model_config=model_config,
+        )
+
+    quote = quote_video_digest(team=team, model_config=model_config)
     if quote.meta.get("rate"):
-        request_payload["points_per_yuan_snapshot"] = quote.meta["rate"]
+        request_payload = {**request_payload, "points_per_yuan_snapshot": quote.meta["rate"]}
 
     try:
         with transaction.atomic():
@@ -904,6 +992,53 @@ def submit_team_digest(*, team, user, upload, model_config_id=None) -> dict:
     return serialize_digest_job(task)
 
 
+def _payload_from_existing_source(*, team, reuse_task_id, model_config) -> dict:
+    from django.core.exceptions import ValidationError
+
+    from apps.ai.models import AITask
+
+    task_id = str(reuse_task_id or "").strip()
+    if not task_id:
+        raise VideoDigestError("请先上传参考视频")
+    try:
+        previous = AITask.objects.filter(
+            id=task_id,
+            team=team,
+            task_type=AITask.Type.VIDEO_DIGEST,
+            project__isnull=True,
+            is_deleted=False,
+            purged_at__isnull=True,
+        ).first()
+    except (ValueError, ValidationError, TypeError):
+        raise VideoDigestError("请先上传参考视频") from None
+    if previous is None:
+        raise VideoDigestError("请先上传参考视频")
+    req = previous.request_payload or {}
+    source_key = str(req.get("source_key") or "").strip()
+    if not source_key:
+        raise VideoDigestError("参考视频已失效，请重新上传")
+    file_name = str(req.get("file_name") or "") or "参考视频.mp4"
+    return {
+        "model": model_config.name,
+        "endpoint": model_config.endpoint,
+        "feature": "video_remix",
+        "duration_seconds": float(req.get("duration_seconds") or 0),
+        "file_name": file_name,
+        "title": str(req.get("title") or "").strip() or title_from_filename(file_name),
+        "file_size": int(req.get("file_size") or 0),
+        "width": int(req.get("width") or 0),
+        "height": int(req.get("height") or 0),
+        "ratio": str(req.get("ratio") or ""),
+        "suffix": str(req.get("suffix") or ".mp4"),
+        "source_key": source_key,
+        "source_url": str(req.get("source_url") or ""),
+        "cover_key": str(req.get("cover_key") or ""),
+        "cover_url": str(req.get("cover_url") or ""),
+        "video_key": str(req.get("video_key") or ""),
+        "video_url": str(req.get("video_url") or ""),
+    }
+
+
 def run_team_digest_task(*, task_id: str) -> None:
     """Worker:从 TOS 取参考视频,跑抽帧 + Gemini,失败退费。"""
     from django.db import transaction
@@ -1078,6 +1213,11 @@ def _digest_video(*, team, user, upload, project=None, product_hint="", model_co
             raise VideoDigestError(str(exc)) from exc
     reservation = task.credit_reservation
     try:
+        task.refresh_from_db()
+        if task.status == AITask.Status.CANCELLED:
+            if source_path:
+                Path(source_path).unlink(missing_ok=True)
+            return serialize_digest_job(task)
         task.status = AITask.Status.SUBMITTED
         task.submitted_at = timezone.now()
         task.save(update_fields=["status", "submitted_at", "updated_at"])
@@ -1105,6 +1245,9 @@ def _digest_video(*, team, user, upload, project=None, product_hint="", model_co
     except Exception as exc:  # noqa: BLE001
         if source_path:
             Path(source_path).unlink(missing_ok=True)
+        task.refresh_from_db()
+        if task.status == AITask.Status.CANCELLED:
+            return serialize_digest_job(task)
         _fail_digest_task(task, reservation, str(exc))
         raise
 
@@ -1145,6 +1288,10 @@ def _digest_video(*, team, user, upload, project=None, product_hint="", model_co
     }
 
     with transaction.atomic():
+        locked = AITask.objects.select_for_update().get(id=task.id)
+        if locked.status == AITask.Status.CANCELLED:
+            return serialize_digest_job(locked)
+        task = locked
         task.status = AITask.Status.SUCCEEDED
         task.request_payload = request_payload
         task.response_payload = {"digest": digest[:32000], "prompt": digest[:32000]}

core/backend/apps/ai/views.py

@@ -711,9 +711,10 @@ class VideoDigestView(APIView):
     parser_classes = [MultiPartParser, FormParser, JSONParser]
 
     def get(self, request):
-        from .video_digest import get_inflight_team_digest, list_team_digest_history
+        from .video_digest import expire_stale_team_digests, get_inflight_team_digest, list_team_digest_history
 
         team = get_current_team(request.user)
+        expire_stale_team_digests(team=team)
         results = list_team_digest_history(team=team)
         return Response({
             "results": results,
@@ -723,7 +724,8 @@ class VideoDigestView(APIView):
 
     def post(self, request):
         upload = request.FILES.get("file") or request.data.get("file")
-        if upload is None:
+        reuse_task_id = request.data.get("reuse_task_id") or None
+        if upload is None and not reuse_task_id:
             return Response({"detail": "请先上传参考视频"}, status=status.HTTP_400_BAD_REQUEST)
         require_worker_task("apps.ai.tasks.run_video_digest_task")
         from .video_digest import VideoDigestError, submit_team_digest
@@ -734,6 +736,7 @@ class VideoDigestView(APIView):
                 team=team,
                 user=request.user,
                 upload=upload,
+                reuse_task_id=reuse_task_id,
                 model_config_id=request.data.get("model_config_id") or None,
             )
         except VideoDigestError as exc:
@@ -745,12 +748,16 @@ class VideoDigestView(APIView):
                 {"detail": public_error.fallback_message, "error": public_error.as_dict()},
                 status=status.HTTP_502_BAD_GATEWAY,
             )
-        return Response({"name": getattr(upload, "name", "") or "参考视频", **result}, status=status.HTTP_202_ACCEPTED)
+        return Response(
+            {"name": getattr(upload, "name", "") or result.get("file_name") or "参考视频", **result},
+            status=status.HTTP_202_ACCEPTED,
+        )
 
 
 class VideoDigestDetailView(APIView):
     """GET /api/ai/video-digest/<id>/  轮询提炼任务。
     PATCH /api/ai/video-digest/<id>/  保存编辑后的提示词到这条历史。
+    DELETE /api/ai/video-digest/<id>/  取消进行中的提炼并退预留积分。
     """
 
     parser_classes = [JSONParser, FormParser]
@@ -780,6 +787,15 @@ class VideoDigestDetailView(APIView):
             return Response({"detail": "记录不存在"}, status=status.HTTP_404_NOT_FOUND)
         return Response(item)
 
+    def delete(self, request, task_id):
+        from .video_digest import cancel_team_digest
+
+        team = get_current_team(request.user)
+        item = cancel_team_digest(team=team, task_id=task_id)
+        if item is None:
+            return Response({"detail": "记录不存在"}, status=status.HTTP_404_NOT_FOUND)
+        return Response(item)
+
 
 class FreeVideoView(APIView):
     """自由创作·视频生成(不绑项目,universal 全能参考 / keyframe 首尾帧)。

core/frontend/src/api.ts

@@ -413,10 +413,23 @@ export const api = {
     );
   },
   // 视频提炼页:不绑项目。POST 秒回任务,worker 抽帧 + Gemini;离开页面也不中断。
-  extractVideoDigest(formData: FormData) {
+  extractVideoDigest(formData: FormData, signal?: AbortSignal) {
     return request<VideoDigestJob>(
       "/api/ai/video-digest/",
-      { method: "POST", body: formData }
+      { method: "POST", body: formData, signal }
+    );
+  },
+  extractVideoDigestFromTask(taskId: string, modelConfigId?: string, signal?: AbortSignal) {
+    return request<VideoDigestJob>(
+      "/api/ai/video-digest/",
+      {
+        method: "POST",
+        body: JSON.stringify({
+          reuse_task_id: taskId,
+          ...(modelConfigId ? { model_config_id: modelConfigId } : {}),
+        }),
+        signal,
+      }
     );
   },
   listVideoDigests() {
@@ -425,6 +438,9 @@ export const api = {
   getVideoDigest(id: string) {
     return request<VideoDigestJob>(`/api/ai/video-digest/${id}/`);
   },
+  cancelVideoDigest(id: string) {
+    return request<VideoDigestJob>(`/api/ai/video-digest/${id}/`, { method: "DELETE" });
+  },
   saveVideoDigest(id: string, prompt: string) {
     return request<VideoDigestHistory>(`/api/ai/video-digest/${id}/`, {
       method: "PATCH",

core/frontend/src/routes/video-remix.tsx

@@ -1,12 +1,12 @@
 // 提炼提示词 · 上传参考视频 → 拆解接口 → 可编辑提示词。对照影擎 remix-page。
 import { useEffect, useMemo, useRef, useState } from "react";
 import {
+  AlertCircle,
   ArrowLeft,
   ArrowRight,
   BadgeCheck,
   Clock3,
   Copy,
-  Download,
   FileText,
   FileVideo,
   FileVideo2,
@@ -17,9 +17,10 @@ import {
   ScanLine,
   ScanSearch,
   TextCursorInput,
+  X,
 } from "lucide-react";
 import { api, ApiError } from "../api";
-import { MediaLightbox } from "../components/overlays";
+import { ConfirmModal, MediaLightbox } from "../components/overlays";
 import type { ModelConfig, VideoDigestHistory, VideoDigestJob } from "../types";
 import type { NavigateFn } from "./route-config";
 
@@ -100,6 +101,11 @@ function progressClass(step: ProgressStage, stage: ProgressStage) {
   return "remix-progress-step";
 }
 
+function sameMediaUrl(a: string, b: string) {
+  if (!a || !b) return false;
+  return a.split("?")[0] === b.split("?")[0];
+}
+
 function historySummary(item: VideoDigestHistory) {
   const bits = [item.ratio || "—", item.shots ? `${item.shots} 个镜头` : "—", item.file_name || "参考视频.mp4"];
   return bits.join(" · ");
@@ -141,6 +147,7 @@ export function VideoRemixPage({ textModels = [], onNotify, onBack, navigate }:
 }) {
   const [file, setFile] = useState<File | null>(null);
   const [jobId, setJobId] = useState("");
+  const [watchId, setWatchId] = useState("");
   const [submitting, setSubmitting] = useState(false);
   const [prompt, setPrompt] = useState("");
   const [duration, setDuration] = useState(0);
@@ -154,14 +161,21 @@ export function VideoRemixPage({ textModels = [], onNotify, onBack, navigate }:
   const [taskId, setTaskId] = useState("");
   const [hasResult, setHasResult] = useState(false);
   const [remoteVideoUrl, setRemoteVideoUrl] = useState("");
+  const [coverUrl, setCoverUrl] = useState("");
+  const [sourceTaskId, setSourceTaskId] = useState("");
   const [history, setHistory] = useState<VideoDigestHistory[]>([]);
   const [openHistoryId, setOpenHistoryId] = useState("");
   const [playing, setPlaying] = useState<VideoDigestHistory | null>(null);
+  const [confirmCancel, setConfirmCancel] = useState(false);
   const promptRef = useRef<HTMLTextAreaElement>(null);
   const completedNoticeRef = useRef("");
+  const abortRef = useRef<AbortController | null>(null);
+  const userCancelledRef = useRef(false);
   const blobPreviewUrl = useMemo(() => (file ? URL.createObjectURL(file) : ""), [file]);
   const previewUrl = blobPreviewUrl || remoteVideoUrl;
   const analyzing = submitting || Boolean(jobId);
+  const canAnalyze = Boolean(file || remoteVideoUrl || sourceTaskId);
+  const pollId = jobId || watchId;
 
   const digestModels = useMemo(
     () => textModels.filter((model) => model.status === "active" && isGemini31(model)),
@@ -195,7 +209,14 @@ export function VideoRemixPage({ textModels = [], onNotify, onBack, navigate }:
     if (job.ratio) setRatio(job.ratio);
     if (job.width) setWidth(job.width);
     if (job.height) setHeight(job.height);
-    if (job.video_url) setRemoteVideoUrl(job.video_url);
+    if (job.video_url) {
+      setRemoteVideoUrl((current) => (current && sameMediaUrl(current, job.video_url) ? current : job.video_url));
+    }
+    if (job.cover_url) {
+      setCoverUrl((current) => (current && sameMediaUrl(current, job.cover_url) ? current : job.cover_url));
+    }
+    const id = jobIdOf(job);
+    if (id) setSourceTaskId(id);
   };
 
   const applySucceededJob = (job: VideoDigestJob) => {
@@ -215,15 +236,30 @@ export function VideoRemixPage({ textModels = [], onNotify, onBack, navigate }:
     }
     let cancelled = false;
     void (async () => {
-      const data = await loadHistory();
+      await loadHistory();
       if (cancelled) return;
       const stored = readJobId();
-      const inflightId = data?.inflight ? jobIdOf(data.inflight) : "";
+      if (!stored) return;
-      const next = stored || inflightId;
+      try {
-      if (!next) return;
+        const job = await api.getVideoDigest(stored);
-      rememberJob(next);
+        if (cancelled) return;
-      if (data?.inflight && jobIdOf(data.inflight) === next) applyJobMeta(data.inflight);
+        if (job.status === "processing") {
-      setJobId(next);
+          if (!job.video_url && !job.cover_url) {
+            forgetJob();
+            void api.cancelVideoDigest(stored).catch(() => undefined);
+            return;
+          }
+          applyJobMeta(job);
+          setJobId(stored);
+          return;
+        }
+        if (job.status === "succeeded") {
+          applySucceededJob(job);
+        }
+      } catch {
+        /* 过期 / 已取消 / 不存在:当没任务 */
+      }
+      forgetJob();
     })();
     return () => {
       cancelled = true;
@@ -242,14 +278,13 @@ export function VideoRemixPage({ textModels = [], onNotify, onBack, navigate }:
   }, [prompt, hasResult]);
 
   useEffect(() => {
-    if (!jobId) return;
+    if (!pollId) return;
     let cancelled = false;
     let timer = 0;
     const poll = async () => {
       try {
-        const job = await api.getVideoDigest(jobId);
+        const job = await api.getVideoDigest(pollId);
         if (cancelled) return;
-        applyJobMeta(job);
         if (job.status === "processing") {
           timer = window.setTimeout(poll, 2500);
           return;
@@ -261,15 +296,19 @@ export function VideoRemixPage({ textModels = [], onNotify, onBack, navigate }:
             onNotify("success", "视频拆解完成，已生成提示词");
           }
           void loadHistory();
+        } else if (job.status === "cancelled" || userCancelledRef.current) {
+          if (!userCancelledRef.current) onNotify("info", job.error_message || "拆解已取消");
         } else {
           onNotify("error", job.error_message || "视频拆解失败，请重试");
         }
         setJobId("");
+        setWatchId("");
         forgetJob();
       } catch (error) {
         if (cancelled) return;
         if (error instanceof ApiError && error.status === 404) {
           setJobId("");
+          setWatchId("");
           forgetJob();
           return;
         }
@@ -281,7 +320,7 @@ export function VideoRemixPage({ textModels = [], onNotify, onBack, navigate }:
       cancelled = true;
       window.clearTimeout(timer);
     };
-  }, [jobId, onNotify]);
+  }, [pollId, onNotify]);
 
   const pickFile = async (next: File | null) => {
     if (!next || analyzing) return;
@@ -305,19 +344,36 @@ export function VideoRemixPage({ textModels = [], onNotify, onBack, navigate }:
     setHasResult(false);
     setTaskId("");
     setRemoteVideoUrl("");
+    setCoverUrl("");
+    setSourceTaskId("");
     setPrompt("");
   };
 
   const analyze = async () => {
-    if (!file || analyzing) return;
+    if (analyzing || (!file && !sourceTaskId)) return;
+    userCancelledRef.current = false;
+    abortRef.current?.abort();
+    const previous = watchId || (!jobId ? readJobId() : "");
+    if (previous && previous !== sourceTaskId) {
+      setWatchId("");
+      void api.cancelVideoDigest(previous).catch(() => undefined);
+    }
+    const controller = new AbortController();
+    abortRef.current = controller;
     setSubmitting(true);
     setHasResult(false);
     setPrompt("");
     try {
+      let job;
+      if (file) {
         const fd = new FormData();
         fd.append("file", file);
         if (activeModel?.id) fd.append("model_config_id", activeModel.id);
-      const job = await api.extractVideoDigest(fd);
+        job = await api.extractVideoDigest(fd, controller.signal);
+      } else {
+        job = await api.extractVideoDigestFromTask(sourceTaskId, activeModel?.id, controller.signal);
+      }
+      if (userCancelledRef.current) return;
       const id = jobIdOf(job);
       applyJobMeta(job);
       if (job.status === "succeeded") {
@@ -331,14 +387,35 @@ export function VideoRemixPage({ textModels = [], onNotify, onBack, navigate }:
         return;
       }
       rememberJob(id);
+      setWatchId("");
       setJobId(id);
     } catch (error) {
+      if (userCancelledRef.current || (error instanceof DOMException && error.name === "AbortError")) return;
       onNotify("error", error instanceof Error && error.message ? error.message : "视频拆解失败，请重试");
     } finally {
       setSubmitting(false);
     }
   };
 
+  const cancelAnalyze = async () => {
+    userCancelledRef.current = true;
+    abortRef.current?.abort();
+    const id = jobId || watchId || readJobId();
+    setConfirmCancel(false);
+    setSubmitting(false);
+    setJobId("");
+    setWatchId("");
+    forgetJob();
+    if (id) {
+      try {
+        await api.cancelVideoDigest(id);
+      } catch {
+        /* 已经停掉界面即可 */
+      }
+    }
+    onNotify("info", "已取消拆解");
+  };
+
   const savePrompt = async () => {
     const text = prompt.trim();
     if (!text) return;
@@ -360,25 +437,10 @@ export function VideoRemixPage({ textModels = [], onNotify, onBack, navigate }:
     }
   };
 
-  const downloadVideo = () => {
+  const continueGenerate = (text = prompt) => {
-    if (!remoteVideoUrl) {
+    const next = text.trim();
-      onNotify("info", "这条没有保存原片，重新上传拆一次就能下载");
+    if (!next) return;
-      return;
+    sessionStorage.setItem(REMIX_PROMPT_KEY, next);
-    }
-    const link = document.createElement("a");
-    link.href = remoteVideoUrl;
-    link.download = `${(fileName || "参考视频").replace(/\.[^.]+$/, "") || "参考视频"}.mp4`;
-    link.rel = "noopener";
-    document.body.appendChild(link);
-    link.click();
-    link.remove();
-    onNotify("success", "已开始下载参考视频");
-  };
-
-  const continueGenerate = () => {
-    const text = prompt.trim();
-    if (!text) return;
-    sessionStorage.setItem(REMIX_PROMPT_KEY, text);
     navigate("freeCreate");
   };
 
@@ -443,7 +505,7 @@ export function VideoRemixPage({ textModels = [], onNotify, onBack, navigate }:
                 </div>
                 {previewUrl ? (
                   <div className="video-upload-field has-file has-preview">
-                    <video src={previewUrl} controls playsInline preload="metadata" />
+                    <video src={previewUrl} poster={coverUrl || undefined} controls playsInline preload="metadata" />
                     <label className={`remix-replace-video${analyzing ? " is-disabled" : ""}`}>
                       <input
                         type="file"
@@ -479,7 +541,12 @@ export function VideoRemixPage({ textModels = [], onNotify, onBack, navigate }:
                 )}
               </div>
               <div className="video-flow-actions remix-analyze-actions">
-                <button type="button" className="primary-action" disabled={!file || analyzing} onClick={() => void analyze()}>
+                <button
+                  type="button"
+                  className="primary-action"
+                  disabled={analyzing || !canAnalyze}
+                  onClick={() => void analyze()}
+                >
                   <ScanSearch />
                   <span>{analyzeLabel}</span>
                 </button>
@@ -501,7 +568,10 @@ export function VideoRemixPage({ textModels = [], onNotify, onBack, navigate }:
                   </div>
                   <strong>正在提炼提示词</strong>
                   <span>离开页面也不会中断，稍后回来即可查看结果</span>
-                  <div className="remix-generating-bar" aria-hidden="true"><span /></div>
+                  <button type="button" className="secondary-action remix-cancel-analyze" onClick={() => setConfirmCancel(true)}>
+                    <X />
+                    取消
+                  </button>
                 </div>
               </div>
               <div className="video-analysis-result">
@@ -546,10 +616,6 @@ export function VideoRemixPage({ textModels = [], onNotify, onBack, navigate }:
                   <div><h2>提示词内容</h2></div>
                 </div>
                 <div className="remix-prompt-head-actions">
-                  <button type="button" className="secondary-action remix-prompt-head-btn" onClick={downloadVideo} disabled={!remoteVideoUrl}>
-                    <Download />
-                    下载视频
-                  </button>
                   <button type="button" className="secondary-action remix-prompt-head-btn" onClick={() => void savePrompt()}>
                     <Save />
                     保存提示词
@@ -564,7 +630,7 @@ export function VideoRemixPage({ textModels = [], onNotify, onBack, navigate }:
                 onChange={(event) => setPrompt(event.target.value)}
               />
               <div className="video-flow-actions remix-prompt-actions">
-                <button type="button" className="primary-action" onClick={continueGenerate}>
+                <button type="button" className="primary-action" onClick={() => continueGenerate()}>
                   <span>生成视频</span>
                   <ArrowRight />
                 </button>
@@ -633,6 +699,15 @@ export function VideoRemixPage({ textModels = [], onNotify, onBack, navigate }:
                       <div className="remix-history-prompt" id={promptId} hidden={!open}>
                         <div className="remix-history-prompt-head">
                           <strong>提示词</strong>
+                          <div className="remix-history-prompt-actions">
+                            <button
+                              type="button"
+                              className="remix-history-copy-button"
+                              onClick={() => continueGenerate(item.prompt)}
+                            >
+                              <ArrowRight />
+                              去生成视频
+                            </button>
                             <button
                               type="button"
                               className="remix-history-copy-button"
@@ -642,6 +717,7 @@ export function VideoRemixPage({ textModels = [], onNotify, onBack, navigate }:
                               复制提示词
                             </button>
                           </div>
+                        </div>
                         <textarea readOnly value={item.prompt} />
                       </div>
                     </article>
@@ -652,6 +728,16 @@ export function VideoRemixPage({ textModels = [], onNotify, onBack, navigate }:
           </section>
         </section>
       </div>
+      <ConfirmModal
+        open={confirmCancel}
+        title="确认取消拆解？"
+        subtitle="当前任务将停止"
+        detail="取消后本次提炼会停止，已预扣的积分会退回。"
+        confirmText="确认取消"
+        icon={<AlertCircle size={16} />}
+        onCancel={() => setConfirmCancel(false)}
+        onConfirm={() => void cancelAnalyze()}
+      />
       <MediaLightbox
         open={Boolean(playing?.video_url)}
         src={playing?.video_url || ""}

core/frontend/src/types.ts

@@ -682,7 +682,7 @@ export type FreeVideoTask = {
 export type VideoDigestJob = {
   id: string;
   task_id: string;
-  status: "processing" | "succeeded" | "failed" | string;
+  status: "processing" | "succeeded" | "failed" | "cancelled" | string;
   text: string;
   prompt: string;
   chars: number;

core/frontend/src/video-remix-page.css

@@ -419,6 +419,19 @@
   padding-top: 22px;
 }
 
+.vr-page .remix-generating-content .remix-cancel-analyze {
+  margin-top: 6px;
+  min-width: 112px;
+  height: 40px;
+  color: var(--klein);
+  border-color: rgba(0, 47, 167, 0.22);
+  background: rgba(0, 47, 167, 0.06);
+}
+
+.vr-page .remix-generating-content .remix-cancel-analyze:hover:not(:disabled) {
+  background: rgba(0, 47, 167, 0.1);
+}
+
 .vr-page .video-flow-panel h2,
 .vr-page .video-result-panel h2 {
   margin: 0;
@@ -676,24 +689,6 @@
   line-height: 1.55;
 }
 
-.vr-page .remix-generating-bar {
-  width: 100%;
-  height: 4px;
-  overflow: hidden;
-  margin-top: 6px;
-  border-radius: 999px;
-  background: rgba(0, 47, 167, 0.1);
-}
-
-.vr-page .remix-generating-bar span {
-  display: block;
-  width: 42%;
-  height: 100%;
-  border-radius: inherit;
-  background: var(--klein);
-  animation: remix-progress-slide 1.2s ease-in-out infinite;
-}
-
 @keyframes remix-frame-scan {
   0% { transform: translateX(-130%); }
   100% { transform: translateX(130%); }
@@ -704,11 +699,6 @@
   50% { transform: scale(1.07); }
 }
 
-@keyframes remix-progress-slide {
-  0% { transform: translateX(-115%); }
-  100% { transform: translateX(260%); }
-}
-
 .vr-page .remix-progress-strip {
   display: grid;
   grid-template-columns: repeat(3, minmax(0, 1fr));
@@ -857,6 +847,16 @@
   padding: 0;
   overflow: hidden;
   cursor: default;
+  background: #0f1728;
+  border-color: rgba(0, 47, 167, 0.28);
+  box-shadow: none;
+}
+
+.vr-page .remix-page .video-upload-field.has-preview:hover,
+.vr-page .remix-page .video-upload-field.has-preview:focus-within {
+  background: #0f1728;
+  border-color: rgba(0, 47, 167, 0.28);
+  box-shadow: none;
 }
 
 .vr-page .remix-page .video-upload-field.has-preview video {
@@ -891,11 +891,6 @@
   opacity: 0.45;
 }
 
-.vr-page .remix-page .video-upload-field.has-preview:hover,
-.vr-page .remix-page .video-upload-field.has-preview:focus-within {
-  background: #0f1728;
-}
-
 .vr-page .remix-page .video-upload-field strong {
   color: #1d2940;
   font-size: 15px;
@@ -961,8 +956,7 @@
     animation: none;
   }
   .vr-page .remix-generating-frame::after,
-  .vr-page .remix-generating-badge,
+  .vr-page .remix-generating-badge {
-  .vr-page .remix-generating-bar span {
     animation: none;
   }
 }
@@ -1211,6 +1205,14 @@
   font-weight: 600;
 }
 
+.vr-page .remix-history-prompt-actions {
+  display: flex;
+  align-items: center;
+  justify-content: flex-end;
+  gap: 8px;
+  flex: 0 0 auto;
+}
+
 .vr-page .remix-history-prompt textarea {
   width: 100%;
   min-height: 360px;