feat: 添加视频生成功能增强和多维度计费系统适配

- 视频生成: 增强 video_handler，重构 task_poller，新增 telemetry
- 计费系统: 适配新的 signature 格式，支持 video 任务类型回退
- 数据库迁移: 添加 api_family/endpoint_kind 字段和 video_formats

src/api/handlers/base/video_adapter_base.py

@@ -6,7 +6,7 @@ Video Adapter 通用基类
 
 from __future__ import annotations
 
-from typing import Any
+from typing import Any, ClassVar
 
 from fastapi import HTTPException, Request
 from fastapi.responses import Response
@@ -14,7 +14,12 @@ from fastapi.responses import Response
 from src.api.base.adapter import ApiAdapter, ApiMode
 from src.api.base.context import ApiRequestContext
 from src.api.handlers.base.video_handler_base import VideoHandlerBase
-from src.core.api_format import APIFormat, get_auth_handler, get_default_auth_method
+from src.core.api_format import (
+    ApiFamily,
+    EndpointKind,
+    get_auth_handler,
+    get_default_auth_method_for_endpoint,
+)
 from src.core.logger import logger
 
 
@@ -24,21 +29,18 @@ class VideoAdapterBase(ApiAdapter):
     FORMAT_ID: str = "UNKNOWN"
     HANDLER_CLASS: type[VideoHandlerBase]
 
+    # 新架构：结构化标识（逐步替代直接依赖 FORMAT_ID 的语义）
+    API_FAMILY: ClassVar[ApiFamily | None] = None
+    ENDPOINT_KIND: ClassVar[EndpointKind] = EndpointKind.VIDEO
+
     name: str = "video.base"
     mode = ApiMode.STANDARD
 
     def __init__(self, allowed_api_formats: list[str] | None = None):
         self.allowed_api_formats = allowed_api_formats or [self.FORMAT_ID]
 
-    @classmethod
-    def _get_api_format(cls) -> APIFormat:
-        try:
-            return APIFormat[cls.FORMAT_ID]
-        except KeyError:
-            return APIFormat.OPENAI
-
     def extract_api_key(self, request: Request) -> str | None:
-        auth_method = get_default_auth_method(self._get_api_format())
+        auth_method = get_default_auth_method_for_endpoint(self.FORMAT_ID)
         handler = get_auth_handler(auth_method)
         return handler.extract_credentials(request)
 
@@ -93,6 +95,17 @@ class VideoAdapterBase(ApiAdapter):
                 path_params=path_params,
             )
 
+        # Remix task
+        if method == "POST" and path.endswith("/remix") and task_id:
+            return await handler.handle_remix_task(
+                task_id=task_id,
+                http_request=http_request,
+                original_headers=context.original_headers,
+                original_request_body=original_request_body,
+                query_params=context.query_params,
+                path_params=path_params,
+            )
+
         # Get task
         if method == "GET" and task_id:
             return await handler.handle_get_task(

src/api/handlers/base/video_handler_base.py

@@ -8,19 +8,26 @@ from __future__ import annotations
 
 import re
 from abc import ABC, abstractmethod
+from collections.abc import Awaitable, Callable
 from typing import TYPE_CHECKING, Any
 
 from fastapi import HTTPException, Request
 from fastapi.responses import JSONResponse, Response, StreamingResponse
 from sqlalchemy.orm import Session
 
+from src.config.settings import config
 from src.core.api_format.conversion.internal_video import InternalVideoTask, VideoStatus
+from src.core.exceptions import ProviderNotAvailableException
+from src.core.logger import logger
 from src.models.database import ApiKey, ProviderAPIKey, ProviderEndpoint, User, VideoTask
 from src.services.billing.rule_service import BillingRuleLookupResult
+from src.services.cache.aware_scheduler import ProviderCandidate
 
 if TYPE_CHECKING:
     import httpx
 
+    from src.services.task.orchestrator import SubmitOutcome
+
 # 敏感信息匹配正则（预编译提升性能）
 _SENSITIVE_PATTERN = re.compile(
     r"(api[_-]?key|token|bearer|authorization)[=:\s]+\S+",
@@ -136,6 +143,19 @@ class VideoHandlerBase(ABC):
     ) -> JSONResponse:
         """取消任务"""
 
+    async def handle_remix_task(
+        self,
+        *,
+        task_id: str,
+        http_request: Request,
+        original_headers: dict[str, str],
+        original_request_body: dict[str, Any],
+        query_params: dict[str, str] | None = None,
+        path_params: dict[str, Any] | None = None,
+    ) -> JSONResponse:
+        """Remix 任务（基于已完成视频创建新视频）- 可选实现"""
+        raise HTTPException(status_code=501, detail="Remix not supported for this provider")
+
     @abstractmethod
     async def handle_download_content(
         self,
@@ -164,7 +184,7 @@ class VideoHandlerBase(ABC):
                         status_code=response.status_code,
                         content={"error": payload},
                     )
-            except ValueError, KeyError, TypeError:
+            except (ValueError, KeyError, TypeError):
                 pass
         message = sanitize_error_message(response.text or "Upstream error")
         fallback_payload = self._format_error_payload({"message": message}, response.status_code)
@@ -246,5 +266,74 @@ class VideoHandlerBase(ABC):
             "dimension_mappings": rule.dimension_mappings,
         }
 
+    async def _submit_with_failover(
+        self,
+        *,
+        api_format: str,
+        model_name: str,
+        task_type: str,
+        submit_func: Callable[[ProviderCandidate], Awaitable["httpx.Response"]],
+        extract_external_task_id: Callable[[dict[str, Any]], str | None],
+        supported_auth_types: set[str] | None,
+        allow_format_conversion: bool = False,
+        capability_requirements: dict[str, bool] | None = None,
+        max_candidates: int = 10,
+    ) -> "SubmitOutcome | JSONResponse":
+        """
+        提交阶段故障转移（只负责拿到 external_task_id）。
+
+        返回：
+        - 成功：SubmitOutcome
+        - 上游客户端错误：直接返回脱敏后的 JSONResponse（保留 API 格式差异）
+
+        失败时：
+        - 无可用候选 / 全部失败：抛 HTTPException(503)
+        """
+        # 延迟导入，避免 handler 基类层引入过多依赖导致循环
+        from src.services.task.orchestrator import (
+            AllCandidatesFailedError,
+            AsyncTaskOrchestrator,
+            SubmitOutcome,
+            UpstreamClientRequestError,
+        )
+
+        orchestrator = AsyncTaskOrchestrator(self.db)
+        try:
+            return await orchestrator.submit_with_failover(
+                api_format=api_format,
+                model_name=model_name,
+                affinity_key=str(self.api_key.id),
+                user_api_key=self.api_key,
+                request_id=self.request_id,
+                task_type=task_type,
+                submit_func=submit_func,
+                extract_external_task_id=extract_external_task_id,
+                supported_auth_types=supported_auth_types,
+                allow_format_conversion=allow_format_conversion,
+                capability_requirements=capability_requirements,
+                max_candidates=max_candidates,
+            )
+        except UpstreamClientRequestError as exc:
+            return self._build_error_response(exc.response)
+        except AllCandidatesFailedError as exc:
+            detail = "No available provider for video generation"
+            if config.billing_require_rule:
+                detail = "No available provider with billing rule for video generation"
+            # 记录候选信息到日志
+            logger.warning(
+                "[VideoHandler] All candidates failed: reason=%s, candidate_keys=%s",
+                exc.reason,
+                exc.candidate_keys,
+            )
+            # 创建带有 candidate_keys 的 HTTPException
+            http_exc = HTTPException(status_code=503, detail=detail)
+            http_exc.candidate_keys = exc.candidate_keys  # type: ignore[attr-defined]
+            raise http_exc
+        except ProviderNotAvailableException:
+            detail = "No available provider for video generation"
+            if config.billing_require_rule:
+                detail = "No available provider with billing rule for video generation"
+            raise HTTPException(status_code=503, detail=detail)
+
 
 __all__ = ["VideoHandlerBase", "normalize_gemini_operation_id", "sanitize_error_message"]

src/api/handlers/gemini/video_adapter.py

@@ -6,10 +6,12 @@ from __future__ import annotations
 
 from src.api.handlers.base.video_adapter_base import VideoAdapterBase
 from src.api.handlers.base.video_handler_base import VideoHandlerBase
+from src.core.api_format import ApiFamily
 
 
 class GeminiVeoAdapter(VideoAdapterBase):
-    FORMAT_ID = "GEMINI"
+    FORMAT_ID = "gemini:video"
+    API_FAMILY = ApiFamily.GEMINI
     name = "gemini.video"
 
     @property

src/api/handlers/gemini/video_handler.py

@@ -21,7 +21,13 @@ from src.api.handlers.base.video_handler_base import (
 )
 from src.clients.http_client import HTTPClientPool
 from src.config.settings import config
-from src.core.api_format import APIFormat, build_upstream_headers, get_extra_headers_from_endpoint
+from src.core.api_format import (
+    ApiFamily,
+    EndpointKind,
+    build_upstream_headers_for_endpoint,
+    get_extra_headers_from_endpoint,
+    make_signature_key,
+)
 from src.core.api_format.conversion.internal_video import (
     InternalVideoRequest,
     InternalVideoTask,
@@ -33,11 +39,13 @@ from src.core.crypto import crypto_service
 from src.core.logger import logger
 from src.models.database import ApiKey, ProviderAPIKey, ProviderEndpoint, User, VideoTask
 from src.services.billing.rule_service import BillingRuleLookupResult, BillingRuleService
-from src.services.cache.aware_scheduler import CacheAwareScheduler, ProviderCandidate
+from src.services.cache.aware_scheduler import ProviderCandidate
 
 
 class GeminiVeoHandler(VideoHandlerBase):
-    FORMAT_ID = "GEMINI"
+    FORMAT_ID = "gemini:video"
+    API_FAMILY = ApiFamily.GEMINI
+    ENDPOINT_KIND = EndpointKind.VIDEO
 
     DEFAULT_BASE_URL = "https://generativelanguage.googleapis.com"
 
@@ -84,56 +92,55 @@ class GeminiVeoHandler(VideoHandlerBase):
         except ValueError as e:
             raise HTTPException(status_code=400, detail=str(e))
 
-        candidate, candidate_keys, rule_lookup = await self._select_candidate(
-            internal_request.model
+        async def _submit(candidate: ProviderCandidate) -> Any:
+            upstream_key, endpoint, _key, auth_info = await self._resolve_upstream_key(candidate)
+            upstream_url = self._build_upstream_url(endpoint.base_url, internal_request.model)
+            headers = self._build_upstream_headers(
+                original_headers, upstream_key, endpoint, auth_info
+            )
+            client = await HTTPClientPool.get_default_client_async()
+            return await client.post(upstream_url, headers=headers, json=original_request_body)
+
+        def _extract_task_id(payload: dict[str, Any]) -> str | None:
+            value = payload.get("name")
+            if not value:
+                return None
+            return normalize_gemini_operation_id(str(value))
+
+        outcome_or_response = await self._submit_with_failover(
+            api_format=self.FORMAT_ID,
+            model_name=internal_request.model,
+            task_type="video",
+            submit_func=_submit,
+            extract_external_task_id=_extract_task_id,
+            supported_auth_types={"api_key", "vertex_ai"},
+            allow_format_conversion=False,
+            max_candidates=10,
         )
-        if not candidate:
-            detail = "No available provider for video generation"
-            if config.billing_require_rule:
-                detail = "No available provider with billing rule for video generation"
-            raise HTTPException(status_code=503, detail=detail)
+        if isinstance(outcome_or_response, JSONResponse):
+            return outcome_or_response
+        outcome = outcome_or_response
 
         # 冻结 billing_rule 配置（用于异步任务的成本一致性）
         # 复用 _select_candidate 中已查询的结果；billing_require_rule=false 时需补查
+        rule_lookup = outcome.rule_lookup
         if rule_lookup is None:
             rule_lookup = BillingRuleService.find_rule(
                 self.db,
-                provider_id=candidate.provider.id,
+                provider_id=outcome.candidate.provider.id,
                 model_name=internal_request.model,
                 task_type="video",
             )
         billing_rule_snapshot = self._build_billing_rule_snapshot(rule_lookup)
 
-        upstream_key, endpoint, key, auth_info = await self._resolve_upstream_key(candidate)
-        upstream_url = self._build_upstream_url(endpoint.base_url, internal_request.model)
-        headers = self._build_upstream_headers(original_headers, upstream_key, endpoint, auth_info)
-
-        api_key_header = (
-            headers.get("x-goog-api-key", "")[:10] + "..."
-            if headers.get("x-goog-api-key")
-            else "MISSING"
-        )
-        logger.info(
-            f"[GeminiVeoHandler] Create task: endpoint_id={endpoint.id}, base_url={endpoint.base_url}, upstream_url={upstream_url}, api_key_prefix={api_key_header}"
-        )
-
-        client = await HTTPClientPool.get_default_client_async()
-        response = await client.post(upstream_url, headers=headers, json=original_request_body)
-        if response.status_code >= 400:
-            return self._build_error_response(response)
-
-        payload = response.json()
-        external_task_id = str(payload.get("name") or "")
-        if not external_task_id:
-            raise HTTPException(status_code=502, detail="Upstream returned empty task id")
-        external_task_id = normalize_gemini_operation_id(external_task_id)
+        external_task_id = outcome.external_task_id
 
         task = self._create_task_record(
             external_task_id=external_task_id,
-            candidate=candidate,
+            candidate=outcome.candidate,
             original_request_body=original_request_body,
             internal_request=internal_request,
-            candidate_keys=candidate_keys,
+            candidate_keys=outcome.candidate_keys,
             original_headers=original_headers,
             billing_rule_snapshot=billing_rule_snapshot,
         )
@@ -308,61 +315,6 @@ class GeminiVeoHandler(VideoHandlerBase):
     # Helpers
     # ------------------------------------------------------------------
 
-    async def _select_candidate(
-        self, model_name: str
-    ) -> tuple[ProviderCandidate | None, list[dict[str, Any]], BillingRuleLookupResult | None]:
-        """选择候选 key，返回 (选中的候选, 所有候选列表, 选中候选的 billing rule lookup)"""
-        scheduler = CacheAwareScheduler()
-        candidates, _ = await scheduler.list_all_candidates(
-            db=self.db,
-            api_format=APIFormat.GEMINI,
-            model_name=model_name,
-            affinity_key=str(self.api_key.id),
-            user_api_key=self.api_key,
-            max_candidates=10,
-        )
-        # 记录所有候选 key 信息
-        candidate_keys = []
-        selected_candidate = None
-        selected_index = -1
-        selected_rule_lookup: BillingRuleLookupResult | None = None
-        for idx, candidate in enumerate(candidates):
-            auth_type = getattr(candidate.key, "auth_type", "api_key") or "api_key"
-            has_billing_rule = True
-            rule_lookup: BillingRuleLookupResult | None = None
-            if config.billing_require_rule:
-                rule_lookup = BillingRuleService.find_rule(
-                    self.db,
-                    provider_id=candidate.provider.id,
-                    model_name=model_name,
-                    task_type="video",
-                )
-                has_billing_rule = rule_lookup is not None
-            candidate_info = {
-                "index": idx,
-                "provider_id": candidate.provider.id,
-                "provider_name": candidate.provider.name,
-                "endpoint_id": candidate.endpoint.id,
-                "key_id": candidate.key.id,
-                "key_name": candidate.key.name,
-                "auth_type": auth_type,
-                "has_billing_rule": has_billing_rule,
-                "priority": getattr(candidate.key, "priority", 0) or 0,
-            }
-            candidate_keys.append(candidate_info)
-            if (
-                selected_candidate is None
-                and auth_type in {"api_key", "vertex_ai"}
-                and has_billing_rule
-            ):
-                selected_candidate = candidate
-                selected_index = idx
-                selected_rule_lookup = rule_lookup
-        # 标记选中的候选
-        if selected_index >= 0:
-            candidate_keys[selected_index]["selected"] = True
-        return selected_candidate, candidate_keys, selected_rule_lookup
-
     async def _resolve_upstream_key(
         self, candidate: ProviderCandidate
     ) -> tuple[str, ProviderEndpoint, ProviderAPIKey, Any | None]:
@@ -399,9 +351,13 @@ class GeminiVeoHandler(VideoHandlerBase):
         auth_info: Any | None,
     ) -> dict[str, str]:
         extra_headers = get_extra_headers_from_endpoint(endpoint)
-        headers = build_upstream_headers(
+        endpoint_sig = make_signature_key(
+            str(getattr(endpoint, "api_family", "")).strip().lower(),
+            str(getattr(endpoint, "endpoint_kind", "")).strip().lower(),
+        )
+        headers = build_upstream_headers_for_endpoint(
             original_headers,
-            APIFormat.GEMINI,
+            endpoint_sig,
             upstream_key,
             endpoint_headers=extra_headers,
         )
@@ -459,8 +415,11 @@ class GeminiVeoHandler(VideoHandlerBase):
             provider_id=candidate.provider.id,
             endpoint_id=candidate.endpoint.id,
             key_id=candidate.key.id,
-            client_api_format="GEMINI",
-            provider_api_format=str(candidate.endpoint.api_format),
+            client_api_format=self.FORMAT_ID,
+            provider_api_format=make_signature_key(
+                str(getattr(candidate.endpoint, "api_family", "")).strip().lower(),
+                str(getattr(candidate.endpoint, "endpoint_kind", "")).strip().lower(),
+            ),
             format_converted=False,
             model=internal_request.model,
             prompt=internal_request.prompt,

src/api/handlers/openai/video_adapter.py

@@ -6,10 +6,12 @@ from __future__ import annotations
 
 from src.api.handlers.base.video_adapter_base import VideoAdapterBase
 from src.api.handlers.base.video_handler_base import VideoHandlerBase
+from src.core.api_format import ApiFamily
 
 
 class OpenAIVideoAdapter(VideoAdapterBase):
-    FORMAT_ID = "OPENAI"
+    FORMAT_ID = "openai:video"
+    API_FAMILY = ApiFamily.OPENAI
     name = "openai.video"
 
     @property

src/api/handlers/openai/video_handler.py

@@ -17,7 +17,13 @@ from sqlalchemy.orm import Session
 from src.api.handlers.base.video_handler_base import VideoHandlerBase, sanitize_error_message
 from src.clients.http_client import HTTPClientPool
 from src.config.settings import config
-from src.core.api_format import APIFormat, build_upstream_headers, get_extra_headers_from_endpoint
+from src.core.api_format import (
+    ApiFamily,
+    EndpointKind,
+    build_upstream_headers_for_endpoint,
+    get_extra_headers_from_endpoint,
+    make_signature_key,
+)
 from src.core.api_format.conversion.internal_video import (
     InternalVideoRequest,
     InternalVideoTask,
@@ -29,11 +35,14 @@ from src.core.crypto import crypto_service
 from src.core.logger import logger
 from src.models.database import ApiKey, ProviderAPIKey, ProviderEndpoint, User, VideoTask
 from src.services.billing.rule_service import BillingRuleLookupResult, BillingRuleService
-from src.services.cache.aware_scheduler import CacheAwareScheduler, ProviderCandidate
+from src.services.cache.aware_scheduler import ProviderCandidate
+from src.services.usage.service import UsageService
 
 
 class OpenAIVideoHandler(VideoHandlerBase):
-    FORMAT_ID = "OPENAI"
+    FORMAT_ID = "openai:video"
+    API_FAMILY = ApiFamily.OPENAI
+    ENDPOINT_KIND = EndpointKind.VIDEO
 
     DEFAULT_BASE_URL = "https://api.openai.com"
 
@@ -72,47 +81,87 @@ class OpenAIVideoHandler(VideoHandlerBase):
         try:
             internal_request = self._normalizer.video_request_to_internal(original_request_body)
         except ValueError as e:
+            # 请求解析失败，记录失败的使用记录
+            await self._record_failed_usage(
+                model="unknown",
+                error_message=str(e),
+                status_code=400,
+                original_request_body=original_request_body,
+                original_headers=original_headers,
+            )
             raise HTTPException(status_code=400, detail=str(e))
-        candidate, candidate_keys, rule_lookup = await self._select_candidate(
-            internal_request.model
-        )
-        if not candidate:
-            detail = "No available provider for video generation"
-            if config.billing_require_rule:
-                detail = "No available provider with billing rule for video generation"
-            raise HTTPException(status_code=503, detail=detail)
+
+        async def _submit(candidate: ProviderCandidate) -> Any:
+            upstream_key, endpoint, _provider_key = await self._resolve_upstream_key(candidate)
+            upstream_url = self._build_upstream_url(endpoint.base_url)
+            headers = self._build_upstream_headers(original_headers, upstream_key, endpoint)
+            client = await HTTPClientPool.get_default_client_async()
+            return await client.post(upstream_url, headers=headers, json=original_request_body)
+
+        def _extract_task_id(payload: dict[str, Any]) -> str | None:
+            value = payload.get("id")
+            return str(value) if value else None
+
+        # 捕获提交阶段的所有错误，记录失败任务
+        try:
+            outcome_or_response = await self._submit_with_failover(
+                api_format=self.FORMAT_ID,
+                model_name=internal_request.model,
+                task_type="video",
+                submit_func=_submit,
+                extract_external_task_id=_extract_task_id,
+                supported_auth_types={"api_key"},
+                allow_format_conversion=False,
+                max_candidates=10,
+            )
+        except HTTPException as exc:
+            # 提交失败（如无可用 provider），创建失败任务记录
+            # 尝试获取 candidate_keys（如果是 AllCandidatesFailedError 转换来的）
+            candidate_keys = getattr(exc, "candidate_keys", None)
+            await self._create_failed_task_and_usage(
+                internal_request=internal_request,
+                original_request_body=original_request_body,
+                original_headers=original_headers,
+                error_code="provider_unavailable",
+                error_message=exc.detail if isinstance(exc.detail, str) else str(exc.detail),
+                status_code=exc.status_code,
+                candidate_keys=candidate_keys,
+            )
+            raise
+
+        if isinstance(outcome_or_response, JSONResponse):
+            # 上游返回客户端错误，也要记录
+            await self._create_failed_task_and_usage(
+                internal_request=internal_request,
+                original_request_body=original_request_body,
+                original_headers=original_headers,
+                error_code="upstream_client_error",
+                error_message="Upstream rejected the request",
+                status_code=outcome_or_response.status_code,
+            )
+            return outcome_or_response
+        outcome = outcome_or_response
 
         # 冻结 billing_rule 配置（用于异步任务的成本一致性）
         # 复用 _select_candidate 中已查询的结果；billing_require_rule=false 时需补查
+        rule_lookup = outcome.rule_lookup
         if rule_lookup is None:
             rule_lookup = BillingRuleService.find_rule(
                 self.db,
-                provider_id=candidate.provider.id,
+                provider_id=outcome.candidate.provider.id,
                 model_name=internal_request.model,
                 task_type="video",
             )
         billing_rule_snapshot = self._build_billing_rule_snapshot(rule_lookup)
 
-        upstream_key, endpoint, provider_key = await self._resolve_upstream_key(candidate)
-        upstream_url = self._build_upstream_url(endpoint.base_url)
-        headers = self._build_upstream_headers(original_headers, upstream_key, endpoint)
-
-        client = await HTTPClientPool.get_default_client_async()
-        response = await client.post(upstream_url, headers=headers, json=original_request_body)
-        if response.status_code >= 400:
-            return self._build_error_response(response)
-
-        payload = response.json()
-        external_task_id = str(payload.get("id") or "")
-        if not external_task_id:
-            raise HTTPException(status_code=502, detail="Upstream returned empty task id")
+        external_task_id = outcome.external_task_id
 
         task = self._create_task_record(
             external_task_id=external_task_id,
-            candidate=candidate,
+            candidate=outcome.candidate,
             original_request_body=original_request_body,
             internal_request=internal_request,
-            candidate_keys=candidate_keys,
+            candidate_keys=outcome.candidate_keys,
             original_headers=original_headers,
             billing_rule_snapshot=billing_rule_snapshot,
         )
@@ -199,6 +248,117 @@ class OpenAIVideoHandler(VideoHandlerBase):
         self.db.commit()
         return JSONResponse({})
 
+    async def handle_remix_task(
+        self,
+        *,
+        task_id: str,
+        http_request: Request,
+        original_headers: dict[str, str],
+        original_request_body: dict[str, Any],
+        query_params: dict[str, str] | None = None,
+        path_params: dict[str, Any] | None = None,
+    ) -> JSONResponse:
+        # 获取原始任务以验证所有权和状态
+        original_task = self._get_task(task_id)
+        if original_task.status != VideoStatus.COMPLETED.value:
+            raise HTTPException(
+                status_code=400,
+                detail=f"Can only remix completed videos (current status: {original_task.status})",
+            )
+        if not original_task.external_task_id:
+            raise HTTPException(status_code=500, detail="Original task missing external_task_id")
+
+        # 获取原始任务的 endpoint 和 key
+        endpoint, key = self._get_endpoint_and_key(original_task)
+        if not key.api_key:
+            raise HTTPException(status_code=500, detail="Provider key not configured")
+        upstream_key = crypto_service.decrypt(key.api_key)
+
+        # 构建 remix 请求的上游 URL
+        upstream_url = self._build_upstream_url(
+            endpoint.base_url, f"{original_task.external_task_id}/remix"
+        )
+        headers = self._build_upstream_headers(original_headers, upstream_key, endpoint)
+
+        client = await HTTPClientPool.get_default_client_async()
+        response = await client.post(upstream_url, headers=headers, json=original_request_body)
+
+        if response.status_code >= 400:
+            return self._build_error_response(response)
+
+        # 解析上游响应
+        try:
+            response_data = response.json()
+        except (ValueError, TypeError):
+            raise HTTPException(status_code=502, detail="Invalid response from upstream")
+
+        external_task_id = response_data.get("id")
+        if not external_task_id:
+            raise HTTPException(status_code=502, detail="Upstream did not return task ID")
+
+        # 解析 remix 请求
+        try:
+            internal_request = self._normalizer.video_request_to_internal(
+                {
+                    "prompt": original_request_body.get("prompt", ""),
+                    "model": original_task.model,
+                    "size": original_task.size,
+                    "seconds": original_task.duration_seconds,
+                }
+            )
+        except ValueError as e:
+            raise HTTPException(status_code=400, detail=str(e))
+
+        # 复用原始任务的 billing rule snapshot
+        billing_rule_snapshot = None
+        if original_task.request_metadata:
+            billing_rule_snapshot = original_task.request_metadata.get("billing_rule_snapshot")
+
+        # 构建 ProviderCandidate（复用原始任务的 provider 配置）
+        from src.models.database import Provider
+
+        provider = self.db.query(Provider).filter(Provider.id == original_task.provider_id).first()
+        if not provider:
+            raise HTTPException(status_code=500, detail="Provider not found")
+
+        candidate = ProviderCandidate(
+            provider=provider,
+            endpoint=endpoint,
+            key=key,
+        )
+
+        # 创建新任务记录
+        task = self._create_task_record(
+            external_task_id=external_task_id,
+            candidate=candidate,
+            original_request_body={
+                **original_request_body,
+                "remix_video_id": task_id,
+            },
+            internal_request=internal_request,
+            original_headers=original_headers,
+            billing_rule_snapshot=billing_rule_snapshot,
+        )
+
+        try:
+            self.db.add(task)
+            self.db.flush()
+            self.db.commit()
+            self.db.refresh(task)
+        except IntegrityError:
+            self.db.rollback()
+            raise HTTPException(status_code=409, detail="Task already exists")
+
+        internal_task = InternalVideoTask(
+            id=task.id,
+            external_id=external_task_id,
+            status=VideoStatus.SUBMITTED,
+            created_at=task.created_at,
+            original_request=internal_request,
+        )
+        response_body = self._normalizer.video_task_from_internal(internal_task)
+        return JSONResponse(response_body)
+
     async def handle_download_content(
         self,
         *,
@@ -236,9 +396,19 @@ class OpenAIVideoHandler(VideoHandlerBase):
             raise HTTPException(status_code=500, detail="Provider key not configured")
         upstream_key = crypto_service.decrypt(key.api_key)
 
-        upstream_url = self._build_upstream_url(
-            endpoint.base_url, f"{task.external_task_id}/content"
-        )
+        # 支持 variant 查询参数: video (默认), thumbnail, spritesheet
+        variant = (query_params or {}).get("variant", "video")
+        if variant not in {"video", "thumbnail", "spritesheet"}:
+            raise HTTPException(
+                status_code=400,
+                detail=f"Invalid variant '{variant}'. Must be one of: video, thumbnail, spritesheet",
+            )
+
+        # 构建上游 URL，透传 variant 参数
+        content_path = f"{task.external_task_id}/content"
+        if variant != "video":
+            content_path = f"{content_path}?variant={variant}"
+        upstream_url = self._build_upstream_url(endpoint.base_url, content_path)
         headers = self._build_upstream_headers(original_headers, upstream_key, endpoint)
 
         client = await HTTPClientPool.get_default_client_async()
@@ -299,57 +469,6 @@ class OpenAIVideoHandler(VideoHandlerBase):
     # Helpers
     # ------------------------------------------------------------------
 
-    async def _select_candidate(
-        self, model_name: str
-    ) -> tuple[ProviderCandidate | None, list[dict[str, Any]], BillingRuleLookupResult | None]:
-        """选择候选 key，返回 (选中的候选, 所有候选列表, 选中候选的 billing rule lookup)"""
-        scheduler = CacheAwareScheduler()
-        candidates, _ = await scheduler.list_all_candidates(
-            db=self.db,
-            api_format=APIFormat.OPENAI,
-            model_name=model_name,
-            affinity_key=str(self.api_key.id),
-            user_api_key=self.api_key,
-            max_candidates=10,
-        )
-        # 记录所有候选 key 信息
-        candidate_keys = []
-        selected_candidate = None
-        selected_index = -1
-        selected_rule_lookup: BillingRuleLookupResult | None = None
-        for idx, candidate in enumerate(candidates):
-            auth_type = getattr(candidate.key, "auth_type", "api_key") or "api_key"
-            has_billing_rule = True
-            rule_lookup: BillingRuleLookupResult | None = None
-            if config.billing_require_rule:
-                rule_lookup = BillingRuleService.find_rule(
-                    self.db,
-                    provider_id=candidate.provider.id,
-                    model_name=model_name,
-                    task_type="video",
-                )
-                has_billing_rule = rule_lookup is not None
-            candidate_info = {
-                "index": idx,
-                "provider_id": candidate.provider.id,
-                "provider_name": candidate.provider.name,
-                "endpoint_id": candidate.endpoint.id,
-                "key_id": candidate.key.id,
-                "key_name": candidate.key.name,
-                "auth_type": auth_type,
-                "has_billing_rule": has_billing_rule,
-                "priority": getattr(candidate.key, "priority", 0) or 0,
-            }
-            candidate_keys.append(candidate_info)
-            if selected_candidate is None and auth_type == "api_key" and has_billing_rule:
-                selected_candidate = candidate
-                selected_index = idx
-                selected_rule_lookup = rule_lookup
-        # 标记选中的候选
-        if selected_index >= 0:
-            candidate_keys[selected_index]["selected"] = True
-        return selected_candidate, candidate_keys, selected_rule_lookup
-
     async def _resolve_upstream_key(
         self, candidate: ProviderCandidate
     ) -> tuple[str, ProviderEndpoint, ProviderAPIKey]:
@@ -378,9 +497,13 @@ class OpenAIVideoHandler(VideoHandlerBase):
         self, original_headers: dict[str, str], upstream_key: str, endpoint: ProviderEndpoint
     ) -> dict[str, str]:
         extra_headers = get_extra_headers_from_endpoint(endpoint)
-        return build_upstream_headers(
+        endpoint_sig = make_signature_key(
+            str(getattr(endpoint, "api_family", "")).strip().lower(),
+            str(getattr(endpoint, "endpoint_kind", "")).strip().lower(),
+        )
+        return build_upstream_headers_for_endpoint(
             original_headers,
-            APIFormat.OPENAI,
+            endpoint_sig,
             upstream_key,
             endpoint_headers=extra_headers,
         )
@@ -428,8 +551,11 @@ class OpenAIVideoHandler(VideoHandlerBase):
             provider_id=candidate.provider.id,
             endpoint_id=candidate.endpoint.id,
             key_id=candidate.key.id,
-            client_api_format="OPENAI",
-            provider_api_format=str(candidate.endpoint.api_format),
+            client_api_format=self.FORMAT_ID,
+            provider_api_format=make_signature_key(
+                str(getattr(candidate.endpoint, "api_family", "")).strip().lower(),
+                str(getattr(candidate.endpoint, "endpoint_kind", "")).strip().lower(),
+            ),
             format_converted=False,
             model=internal_request.model,
             prompt=internal_request.prompt,
@@ -473,5 +599,184 @@ class OpenAIVideoHandler(VideoHandlerBase):
             extra={"model": task.model, "size": task.size, "seconds": task.duration_seconds},
         )
 
+    async def _record_failed_usage(
+        self,
+        *,
+        model: str,
+        error_message: str,
+        status_code: int,
+        original_request_body: dict[str, Any],
+        original_headers: dict[str, str],
+    ) -> None:
+        """记录失败请求的使用记录（无任务记录）"""
+        import time
+
+        response_time_ms = int((time.time() - self.start_time) * 1000)
+        safe_headers = {
+            k: v
+            for k, v in original_headers.items()
+            if k.lower() not in {"authorization", "x-api-key", "cookie"}
+        }
+
+        try:
+            await UsageService.record_usage_with_custom_cost(
+                db=self.db,
+                user=self.user,
+                api_key=self.api_key,
+                provider="unknown",
+                model=model,
+                request_type="video",
+                total_cost_usd=0.0,
+                request_cost_usd=0.0,
+                input_tokens=0,
+                output_tokens=0,
+                cache_creation_input_tokens=0,
+                cache_read_input_tokens=0,
+                api_format=self.FORMAT_ID,
+                endpoint_api_format=None,
+                has_format_conversion=False,
+                is_stream=False,
+                response_time_ms=response_time_ms,
+                first_byte_time_ms=None,
+                status_code=status_code,
+                error_message=error_message,
+                metadata={"failure_stage": "request_parsing"},
+                request_headers=safe_headers,
+                request_body=original_request_body,
+                provider_request_headers=None,
+                response_headers=None,
+                client_response_headers=None,
+                response_body=None,
+                request_id=self.request_id,
+                provider_id=None,
+                provider_endpoint_id=None,
+                provider_api_key_id=None,
+                status="failed",
+                target_model=None,
+            )
+        except Exception as exc:
+            logger.warning("Failed to record failed usage: %s", sanitize_error_message(str(exc)))
+
+    async def _create_failed_task_and_usage(
+        self,
+        *,
+        internal_request: InternalVideoRequest,
+        original_request_body: dict[str, Any],
+        original_headers: dict[str, str],
+        error_code: str,
+        error_message: str,
+        status_code: int,
+        candidate_keys: list[dict[str, Any]] | None = None,
+    ) -> None:
+        """创建失败的任务记录和使用记录"""
+        import time
+
+        now = datetime.now(timezone.utc)
+        response_time_ms = int((time.time() - self.start_time) * 1000)
+
+        # 构建请求元数据
+        safe_headers = {
+            k: v
+            for k, v in original_headers.items()
+            if k.lower() not in {"authorization", "x-api-key", "cookie"}
+        }
+        request_metadata: dict[str, Any] = {
+            "client_ip": self.client_ip,
+            "user_agent": self.user_agent,
+            "request_id": self.request_id,
+            "request_headers": safe_headers,
+            "failure_stage": "submit",
+        }
+        # 添加候选链路追踪信息
+        if candidate_keys:
+            request_metadata["candidate_keys"] = candidate_keys
+
+        size = internal_request.extra.get("original_size")
+
+        # 创建失败的任务记录
+        task = VideoTask(
+            id=str(uuid4()),
+            external_task_id=None,
+            user_id=self.user.id,
+            api_key_id=self.api_key.id,
+            provider_id=None,
+            endpoint_id=None,
+            key_id=None,
+            client_api_format=self.FORMAT_ID,
+            provider_api_format=self.FORMAT_ID,
+            format_converted=False,
+            model=internal_request.model,
+            prompt=internal_request.prompt,
+            original_request_body=original_request_body,
+            converted_request_body=original_request_body,
+            duration_seconds=internal_request.duration_seconds,
+            resolution=internal_request.resolution,
+            aspect_ratio=internal_request.aspect_ratio,
+            size=size,
+            status=VideoStatus.FAILED.value,
+            progress_percent=0,
+            error_code=error_code,
+            error_message=error_message,
+            submitted_at=now,
+            completed_at=now,
+            request_metadata=request_metadata,
+        )
+
+        try:
+            self.db.add(task)
+            self.db.commit()
+            self.db.refresh(task)
+        except Exception as exc:
+            self.db.rollback()
+            logger.warning(
+                "Failed to create failed task record: %s", sanitize_error_message(str(exc))
+            )
+            # 即使任务记录失败，仍然尝试记录使用记录
+            task = None
+
+        # 记录使用记录
+        try:
+            await UsageService.record_usage_with_custom_cost(
+                db=self.db,
+                user=self.user,
+                api_key=self.api_key,
+                provider="unknown",
+                model=internal_request.model,
+                request_type="video",
+                total_cost_usd=0.0,
+                request_cost_usd=0.0,
+                input_tokens=0,
+                output_tokens=0,
+                cache_creation_input_tokens=0,
+                cache_read_input_tokens=0,
+                api_format=self.FORMAT_ID,
+                endpoint_api_format=None,
+                has_format_conversion=False,
+                is_stream=False,
+                response_time_ms=response_time_ms,
+                first_byte_time_ms=None,
+                status_code=status_code,
+                error_message=error_message,
+                metadata={
+                    "failure_stage": "submit",
+                    "error_code": error_code,
+                    "video_task_id": task.id if task else None,
+                },
+                request_headers=safe_headers,
+                request_body=original_request_body,
+                provider_request_headers=None,
+                response_headers=None,
+                client_response_headers=None,
+                response_body=None,
+                request_id=self.request_id,
+                provider_id=None,
+                provider_endpoint_id=None,
+                provider_api_key_id=None,
+                status="failed",
+                target_model=None,
+            )
+        except Exception as exc:
+            logger.warning("Failed to record failed usage: %s", sanitize_error_message(str(exc)))
+
 
 __all__ = ["OpenAIVideoHandler"]

src/api/public/videos.py

@@ -90,6 +90,21 @@ async def download_video_content_sora(
     )
 
 
+@router.post("/v1/videos/{task_id}/remix")
+async def remix_video_sora(
+    task_id: str, http_request: Request, db: Session = Depends(get_db)
+) -> Any:
+    adapter = OpenAIVideoAdapter()
+    return await pipeline.run(
+        adapter=adapter,
+        http_request=http_request,
+        db=db,
+        mode=adapter.mode,
+        api_format_hint=adapter.allowed_api_formats[0],
+        path_params={"task_id": task_id},
+    )
+
+
 # -------------------- Gemini Veo compatible --------------------
 
 

src/services/billing/__init__.py

@@ -11,7 +11,7 @@
     from src.services.billing import BillingCalculator, UsageMapper, StandardizedUsage
 
     # 1. 将原始 usage 映射为标准格式
-    usage = UsageMapper.map(raw_usage, api_format="OPENAI")
+    usage = UsageMapper.map(raw_usage, api_format="openai:chat")
 
     # 2. 使用计费计算器计算费用
     calculator = BillingCalculator(template="openai")

src/services/billing/dimension_collector_service.py

@@ -29,7 +29,11 @@ ValueType = Literal["float", "int", "string"]
 
 
 def _normalize_api_format(api_format: str | None) -> str:
-    return (api_format or "").upper()
+    if not api_format:
+        return ""
+    from src.core.api_format.signature import normalize_signature_key
+
+    return normalize_signature_key(api_format)
 
 
 def _normalize_task_type(task_type: str | None) -> str:
@@ -312,6 +316,45 @@ class DimensionCollectorService:
         task = _normalize_task_type(task_type)
         api_variants = list({api, api.lower()})
 
+        if task == "video":
+            # VIDEO → base 回退：优先使用 family:video 专用 collector；
+            # 缺失的维度再回退到 family:chat。
+            from src.core.api_format.signature import parse_signature_key
+
+            base_api = api
+            try:
+                sig = parse_signature_key(api)
+                if sig.endpoint_kind.value == "video":
+                    base_api = f"{sig.api_family.value}:chat"
+            except Exception:
+                base_api = api
+            base_variants = list({base_api, base_api.lower()})
+
+            video_collectors = (
+                self.db.query(DimensionCollector)
+                .filter(
+                    DimensionCollector.api_format.in_(api_variants),
+                    DimensionCollector.task_type == "video",
+                    DimensionCollector.is_enabled == True,  # noqa: E712
+                )
+                .all()
+            )
+            base_collectors = (
+                self.db.query(DimensionCollector)
+                .filter(
+                    DimensionCollector.api_format.in_(base_variants),
+                    DimensionCollector.task_type == "video",
+                    DimensionCollector.is_enabled == True,  # noqa: E712
+                )
+                .all()
+            )
+            video_dims: set[str] = {c.dimension_name for c in video_collectors}
+            result: list[DimensionCollector] = list(video_collectors)
+            for c in base_collectors:
+                if c.dimension_name not in video_dims:
+                    result.append(c)
+            return result
+
         if task == "cli":
             # CLI → chat：按维度回退（维度存在 cli collector 则用 cli，否则用 chat）
             cli_collectors = (

src/services/billing/usage_mapper.py

@@ -4,9 +4,9 @@ Usage 字段映射器
 将不同 API 格式的原始 usage 数据映射为标准化格式。
 
 支持的格式：
-- OPENAI / OPENAI_CLI: OpenAI Chat Completions API
-- CLAUDE / CLAUDE_CLI: Anthropic Messages API
-- GEMINI / GEMINI_CLI: Google Gemini API
+- openai:*: OpenAI compatible (Chat/CLI)
+- claude:*: Anthropic Messages (Chat/CLI)
+- gemini:*: Google Gemini (Chat/CLI)
 """
 
 from typing import Any
@@ -73,16 +73,6 @@ class UsageMapper:
         "usageMetadata.cachedContentTokenCount": "cache_read_tokens",
     }
 
-    # 格式名称到映射的对应关系
-    FORMAT_MAPPINGS: dict[str, dict[str, str]] = {
-        "OPENAI": OPENAI_MAPPING,
-        "OPENAI_CLI": OPENAI_MAPPING,
-        "CLAUDE": CLAUDE_MAPPING,
-        "CLAUDE_CLI": CLAUDE_MAPPING,
-        "GEMINI": GEMINI_MAPPING,
-        "GEMINI_CLI": GEMINI_MAPPING,
-    }
-
     @classmethod
     def map(
         cls,
@@ -142,12 +132,13 @@ class UsageMapper:
         Returns:
             标准化的 usage 对象
         """
-        format_upper = api_format.upper() if api_format else ""
+        format_norm = (api_format or "").strip().lower()
+        api_family = format_norm.split(":", 1)[0] if ":" in format_norm else format_norm
 
         # 提取 usage 部分
         usage_data: dict[str, Any] = {}
 
-        if format_upper.startswith("GEMINI"):
+        if api_family == "gemini":
             # Gemini: usageMetadata
             usage_data = response.get("usageMetadata", {})
             if not usage_data:
@@ -164,21 +155,14 @@ class UsageMapper:
     @classmethod
     def _get_mapping(cls, api_format: str) -> dict[str, str]:
         """获取对应格式的字段映射"""
-        if not api_format:
-            return cls.CLAUDE_MAPPING
+        format_norm = (api_format or "").strip().lower()
+        api_family = format_norm.split(":", 1)[0] if ":" in format_norm else format_norm
 
-        format_upper = api_format.upper()
-
-        # 精确匹配
-        if format_upper in cls.FORMAT_MAPPINGS:
-            return cls.FORMAT_MAPPINGS[format_upper]
-
-        # 前缀匹配
-        for key, mapping in cls.FORMAT_MAPPINGS.items():
-            if format_upper.startswith(key.split("_")[0]):
-                return mapping
-
-        # 默认使用 Claude 映射
+        if api_family == "openai":
+            return cls.OPENAI_MAPPING
+        if api_family == "gemini":
+            return cls.GEMINI_MAPPING
+        # 默认 Claude（也覆盖未知/空值）
         return cls.CLAUDE_MAPPING
 
     @classmethod

src/services/video/task_poller.py

@@ -19,19 +19,20 @@ from src.api.handlers.base.video_handler_base import (
 from src.clients.http_client import HTTPClientPool
 from src.clients.redis_client import get_redis_client
 from src.config.settings import config
-from src.core.api_format import APIFormat, build_upstream_headers, get_extra_headers_from_endpoint
+from src.core.api_format import (
+    build_upstream_headers_for_endpoint,
+    get_extra_headers_from_endpoint,
+    make_signature_key,
+)
 from src.core.api_format.conversion.internal_video import InternalVideoPollResult, VideoStatus
 from src.core.api_format.conversion.normalizers.gemini import GeminiNormalizer
 from src.core.api_format.conversion.normalizers.openai import OpenAINormalizer
 from src.core.crypto import crypto_service
 from src.core.logger import logger
 from src.database import create_session
-from src.models.database import ApiKey, Provider, ProviderAPIKey, ProviderEndpoint, User, VideoTask
-from src.services.billing.dimension_collector_service import DimensionCollectorService
-from src.services.billing.formula_engine import BillingIncompleteError, FormulaEngine
-from src.services.billing.rule_service import BillingRuleService
+from src.models.database import ProviderAPIKey, ProviderEndpoint, VideoTask
 from src.services.system.scheduler import get_scheduler
-from src.services.usage.service import UsageService
+from src.services.task.impl.video_telemetry import VideoTelemetry
 
 # 永久性错误指示词（用于降级判断，不应重试）
 _PERMANENT_ERROR_INDICATORS = frozenset(
@@ -71,7 +72,6 @@ class VideoTaskPollerService:
         self.redis = None
         self._openai_normalizer = OpenAINormalizer()
         self._gemini_normalizer = GeminiNormalizer()
-        self._formula_engine = FormulaEngine()
         # 追踪连续失败次数（用于告警）
         self._consecutive_failures = 0
         # 从配置读取参数
@@ -248,7 +248,7 @@ class VideoTaskPollerService:
         # 终态写入 Usage（复用外层 per-task session）
         if task.status in (VideoStatus.COMPLETED.value, VideoStatus.FAILED.value):
             try:
-                await self._record_terminal_usage(db, task)
+                await VideoTelemetry(db, redis_client=self.redis).record_terminal_usage(task)
             except Exception as exc:
                 logger.exception(
                     "Failed to record video usage for task=%s: %s",
@@ -264,289 +264,6 @@ class VideoTaskPollerService:
         # 仅在终态写一次，避免污染 request_metadata
         task.request_metadata["poll_raw_response"] = result.raw_response
 
-    async def _record_terminal_usage(self, db: Session, task: VideoTask) -> None:
-        """
-        为视频任务终态写入 Usage：
-        - COMPLETED: 使用 FormulaEngine 计算 cost（或 no_rule / incomplete -> cost=0）
-        - FAILED: cost=0
-        """
-        request_id = None
-        if isinstance(task.request_metadata, dict):
-            request_id = task.request_metadata.get("request_id")
-        request_id = request_id or task.id
-
-        # 计算异步任务总耗时（ms）
-        response_time_ms = None
-        if task.submitted_at and task.completed_at:
-            delta = task.completed_at - task.submitted_at
-            response_time_ms = int(delta.total_seconds() * 1000)
-
-        # 基础维度（无需 collectors 也可计费）
-        base_dimensions: dict[str, Any] = {
-            "duration_seconds": task.duration_seconds,
-            "resolution": task.resolution,
-            "aspect_ratio": task.aspect_ratio,
-            "size": task.size or "",
-            "retry_count": task.retry_count,
-        }
-
-        # collectors 可用的 metadata（结构稳定，便于配置 path）
-        collector_metadata: dict[str, Any] = {
-            "task": {
-                "id": task.id,
-                "external_task_id": task.external_task_id,
-                "model": task.model,
-                "duration_seconds": task.duration_seconds,
-                "resolution": task.resolution,
-                "aspect_ratio": task.aspect_ratio,
-                "size": task.size,
-                "retry_count": task.retry_count,
-                "video_size_bytes": task.video_size_bytes,
-            },
-            "result": {
-                "video_url": task.video_url,
-                "video_urls": task.video_urls or [],
-            },
-        }
-
-        # 维度采集：base + collectors 覆盖/补全
-        dims = DimensionCollectorService(db).collect_dimensions(
-            api_format=task.provider_api_format,
-            task_type="video",
-            request=task.original_request_body or {},
-            response=(
-                (task.request_metadata or {}).get("poll_raw_response")
-                if isinstance(task.request_metadata, dict)
-                else None
-            ),
-            metadata=collector_metadata,
-            base_dimensions=base_dimensions,
-        )
-
-        # 取冻结的 rule_snapshot；若缺失则回退 DB 查找（兼容旧任务）
-        rule_snapshot = None
-        if isinstance(task.request_metadata, dict):
-            rule_snapshot = task.request_metadata.get("billing_rule_snapshot")
-
-        # 构建 billing_snapshot（写入 Usage.request_metadata）
-        billing_snapshot: dict[str, Any] = {
-            "status": "complete",
-            "missing_required": [],
-            "strict_mode": config.billing_strict_mode,
-        }
-        cost = 0.0
-
-        if task.status == VideoStatus.FAILED.value:
-            billing_snapshot["billed_reason"] = "task_failed"
-        else:
-            # COMPLETED：计算成本
-            expression = None
-            variables = None
-            dimension_mappings = None
-            rule_id = None
-            rule_name = None
-            rule_scope = None
-
-            if isinstance(rule_snapshot, dict) and rule_snapshot.get("status") == "ok":
-                rule_id = rule_snapshot.get("rule_id")
-                rule_name = rule_snapshot.get("rule_name")
-                rule_scope = rule_snapshot.get("scope")
-                expression = rule_snapshot.get("expression")
-                variables = rule_snapshot.get("variables")
-                dimension_mappings = rule_snapshot.get("dimension_mappings")
-            else:
-                lookup = BillingRuleService.find_rule(
-                    db,
-                    provider_id=task.provider_id,
-                    model_name=task.model,
-                    task_type="video",
-                )
-                if lookup:
-                    rule = lookup.rule
-                    rule_id = rule.id
-                    rule_name = rule.name
-                    rule_scope = lookup.scope
-                    expression = rule.expression
-                    variables = rule.variables
-                    dimension_mappings = rule.dimension_mappings
-
-            if not expression:
-                billing_snapshot["status"] = "no_rule"
-                billing_snapshot["cost_breakdown"] = {"total": 0.0}
-                logger.warning(
-                    "No billing rule for video task (request_id=%s, model=%s, provider_id=%s)",
-                    request_id,
-                    task.model,
-                    task.provider_id,
-                )
-            else:
-                billing_snapshot.update(
-                    {
-                        "rule_id": rule_id,
-                        "rule_name": rule_name,
-                        "rule_scope": rule_scope,
-                        "expression": expression,
-                        "variables": variables or {},
-                    }
-                )
-                try:
-                    result = self._formula_engine.evaluate(
-                        expression=expression,
-                        variables=variables or {},
-                        dimensions=dims,
-                        dimension_mappings=dimension_mappings or {},
-                        strict_mode=config.billing_strict_mode,
-                    )
-                    billing_snapshot["status"] = result.status
-                    billing_snapshot["missing_required"] = result.missing_required
-                    billing_snapshot["resolved_values"] = result.resolved_values
-                    if result.status == "complete":
-                        cost = result.cost
-                    else:
-                        logger.error(
-                            "Billing incomplete due to missing required dimensions "
-                            "(request_id=%s, model=%s, missing=%s)",
-                            request_id,
-                            task.model,
-                            result.missing_required,
-                        )
-                        cost = 0.0
-                        await self._maybe_alert_missing_required(
-                            model=task.model,
-                            missing_required=result.missing_required,
-                        )
-                    if result.error:
-                        billing_snapshot["error"] = result.error
-                except BillingIncompleteError as exc:
-                    logger.error(
-                        "Billing strict mode triggered (request_id=%s, model=%s, missing=%s)",
-                        request_id,
-                        task.model,
-                        exc.missing_required,
-                    )
-                    billing_snapshot["status"] = "incomplete"
-                    billing_snapshot["missing_required"] = exc.missing_required
-                    billing_snapshot["resolved_values"] = {}
-                    billing_snapshot["error"] = "strict_mode_missing_required"
-                    cost = 0.0
-
-                    # strict_mode=true：标记任务失败并隐藏产物，避免"免费放行"
-                    task.status = VideoStatus.FAILED.value
-                    task.error_code = "billing_incomplete"
-                    task.error_message = f"Missing required dimensions: {exc.missing_required}"
-                    task.video_url = None
-                    task.video_urls = None
-
-                    await self._maybe_alert_missing_required(
-                        model=task.model,
-                        missing_required=exc.missing_required,
-                    )
-
-                billing_snapshot["cost_breakdown"] = {"total": cost}
-
-        # Usage 元数据（包含 snapshot + dimensions + raw_response_ref）
-        usage_metadata: dict[str, Any] = {
-            "billing_snapshot": billing_snapshot,
-            "dimensions": dims,
-            "raw_response_ref": {
-                "video_task_id": task.id,
-                "field": "video_tasks.request_metadata.poll_raw_response",
-            },
-        }
-
-        # 查询关联对象（用于写入 usage.user_id/api_key_id 等）
-        user_obj = db.query(User).filter(User.id == task.user_id).first()
-        api_key_obj = (
-            db.query(ApiKey).filter(ApiKey.id == task.api_key_id).first()
-            if task.api_key_id
-            else None
-        )
-        provider_obj = (
-            db.query(Provider).filter(Provider.id == task.provider_id).first()
-            if task.provider_id
-            else None
-        )
-        provider_name = provider_obj.name if provider_obj else "unknown"
-
-        await UsageService.record_usage_with_custom_cost(
-            db=db,
-            user=user_obj,
-            api_key=api_key_obj,
-            provider=provider_name,
-            model=task.model,
-            request_type="video",
-            total_cost_usd=cost,
-            request_cost_usd=cost,
-            input_tokens=0,
-            output_tokens=0,
-            cache_creation_input_tokens=0,
-            cache_read_input_tokens=0,
-            api_format=task.client_api_format,
-            endpoint_api_format=task.provider_api_format,
-            has_format_conversion=bool(task.format_converted),
-            is_stream=False,
-            response_time_ms=response_time_ms,
-            first_byte_time_ms=None,
-            status_code=200 if task.status == VideoStatus.COMPLETED.value else 500,
-            error_message=(
-                None
-                if task.status == VideoStatus.COMPLETED.value
-                else (task.error_message or task.error_code or "video_task_failed")
-            ),
-            metadata=usage_metadata,
-            request_headers=(
-                (task.request_metadata or {}).get("request_headers")
-                if isinstance(task.request_metadata, dict)
-                else None
-            ),
-            request_body=task.original_request_body,
-            provider_request_headers=None,
-            response_headers=None,
-            client_response_headers=None,
-            response_body=None,
-            request_id=request_id,
-            provider_id=task.provider_id,
-            provider_endpoint_id=task.endpoint_id,
-            provider_api_key_id=task.key_id,
-            status="completed" if task.status == VideoStatus.COMPLETED.value else "failed",
-            target_model=None,
-        )
-
-    async def _maybe_alert_missing_required(
-        self, *, model: str, missing_required: list[str]
-    ) -> None:
-        """required 维度缺失告警：同一 (model, dimension) 1 小时内 >= 10 次触发升级告警。"""
-        if not missing_required:
-            return
-        if not self.redis:
-            # Redis 不可用：降级为日志
-            logger.error(
-                "Missing required billing dimensions (model=%s): %s", model, missing_required
-            )
-            return
-
-        # 按小时 bucket 聚合
-        now = datetime.now(timezone.utc)
-        hour_bucket = now.strftime("%Y%m%d%H")
-        for dim in missing_required:
-            key = f"billing:missing_required:{model}:{dim}:{hour_bucket}"
-            try:
-                count = await self.redis.incr(key)
-                # TTL 略大于 1h，避免边界抖动
-                if count == 1:
-                    await self.redis.expire(key, 3700)
-                if count >= 10:
-                    logger.warning(
-                        "Billing required dimension missing frequently (model=%s, dim=%s, count=%s/hour)",
-                        model,
-                        dim,
-                        count,
-                    )
-            except Exception as exc:
-                logger.warning(
-                    "Failed to record billing alert counter: %s", sanitize_error_message(str(exc))
-                )
-
     def _is_permanent_error(self, exc: Exception, status_code: int | None = None) -> bool:
         """判断是否为永久性错误（不应重试）"""
         # 优先使用 HTTP 状态码判断
@@ -583,7 +300,14 @@ class VideoTaskPollerService:
                 error_message="Failed to decrypt provider key",
             )
 
-        if (task.provider_api_format or "").upper() == "GEMINI":
+        provider_format = (task.provider_api_format or "").strip().lower()
+        if not provider_format:
+            provider_format = make_signature_key(
+                str(getattr(endpoint, "api_family", "")).strip().lower(),
+                str(getattr(endpoint, "endpoint_kind", "")).strip().lower(),
+            )
+
+        if provider_format.startswith("gemini:"):
             auth_info = await get_provider_auth(endpoint, key)
             return await self._poll_gemini(task, endpoint, upstream_key, auth_info)
         return await self._poll_openai(task, endpoint, upstream_key)
@@ -601,7 +325,11 @@ class VideoTaskPollerService:
                 error_message="Task missing external_task_id",
             )
         url = self._build_openai_url(endpoint.base_url, task.external_task_id)
-        headers = self._build_headers(APIFormat.OPENAI, upstream_key, endpoint)
+        endpoint_sig = (task.provider_api_format or "").strip().lower() or make_signature_key(
+            str(getattr(endpoint, "api_family", "")).strip().lower(),
+            str(getattr(endpoint, "endpoint_kind", "")).strip().lower(),
+        )
+        headers = self._build_headers(endpoint_sig, upstream_key, endpoint)
 
         client = await HTTPClientPool.get_default_client_async()
         response = await client.get(url, headers=headers)
@@ -629,7 +357,11 @@ class VideoTaskPollerService:
             )
         operation_name = normalize_gemini_operation_id(task.external_task_id)
         url = self._build_gemini_url(endpoint.base_url, operation_name)
-        headers = self._build_headers(APIFormat.GEMINI, upstream_key, endpoint, auth_info)
+        endpoint_sig = (task.provider_api_format or "").strip().lower() or make_signature_key(
+            str(getattr(endpoint, "api_family", "")).strip().lower(),
+            str(getattr(endpoint, "endpoint_kind", "")).strip().lower(),
+        )
+        headers = self._build_headers(endpoint_sig, upstream_key, endpoint, auth_info)
 
         client = await HTTPClientPool.get_default_client_async()
         response = await client.get(url, headers=headers)
@@ -656,15 +388,15 @@ class VideoTaskPollerService:
 
     def _build_headers(
         self,
-        api_format: APIFormat,
+        endpoint_sig: str,
         upstream_key: str,
         endpoint: ProviderEndpoint,
         auth_info: ProviderAuthInfo | None = None,
     ) -> dict[str, str]:
         extra_headers = get_extra_headers_from_endpoint(endpoint)
-        headers = build_upstream_headers(
+        headers = build_upstream_headers_for_endpoint(
             {},
-            api_format,
+            endpoint_sig,
             upstream_key,
             endpoint_headers=extra_headers,
         )