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feat(#1677): 多视频批量生成后端补全 — 批量预览变体数组 + 按变体独立标题/配音/封面 (#1701)
Co-authored-by: xiaoxia <dev@xiaoxiajianji.com>
Co-committed-by: xiaoxia <dev@xiaoxiajianji.com>
2026-09-05 00:44:24 +08:00

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import json
from datetime import datetime
from pydantic import BaseModel, Field, field_validator, model_validator
class ConfirmGenerationRequest(BaseModel):
"""确认生成请求体 — 基于预览任务创建正式生成任务"""
output_width: int = Field(default=1080, ge=100, description="输出视频宽度")
output_height: int = Field(default=1920, ge=100, description="输出视频高度")
cover_url: str = Field(default="", description="自定义封面图片 URL")
custom_title: str = Field(default="", description="用户自定义标题文本,非空时同步到任务和编辑计划")
class CreateGenerationTaskRequest(BaseModel):
"""创建生成任务请求。
支持两种模式(至少提供一种):
- 项目模式:project_id + asset_library_id(向后兼容)
- 模板模式:template_id + asset_ids / title_ids / voice_ids
"""
project_id: str = ""
asset_library_id: str = ""
strategy_id: str = ""
voice_library_id: str = ""
# ── 多变体独立配音(批量生成)──
# 长度 1 = 所有变体共用;长度 = count = 每个变体独立配音;空数组 = 回退 voice_library_id
voice_library_ids: list[str] = Field(
default_factory=list,
description="各变体独立配音素材库ID数组:长度1=共用,长度=count=独立。为空时回退 voice_library_id",
)
created_by_user_id: str = ""
# ── 模板模式新增字段 ──
template_id: str = ""
asset_ids: list[str] = Field(default_factory=list)
title_ids: list[str] = Field(default_factory=list)
voice_ids: list[str] = Field(default_factory=list)
# ── 来源剪辑计划 ──
source_edit_plan_id: str = ""
# ── 标题配置(结构化)──
title_config: dict | None = Field(
default=None,
description="标题样式对象,包含 text/font/font_size/font_color/position/bold/stroke/shadow 等。为空时不影响现有行为。",
)
# ── 视频标题 ──
video_title: str = Field(default="", description="生成视频的标题/名称,为空则使用默认命名")
# ── 批量生成 ──
count: int = Field(default=1, ge=1, le=50, description="批量生成数量,默认1,最大50")
# ── 素材库自动匹配 ──
asset_select_mode: str = Field(
default="all",
description="素材选取模式:all=全部ready视频, smart=智能匹配(按质量/时长评分)",
)
asset_select_count: int = Field(default=0, ge=0, le=100, description="选取数量,0表示全部(仅 smart 模式有效)")
# ── 自动重试 ──
auto_retry_enabled: bool = Field(
default=False,
description="是否开启失败自动重试,默认关闭",
)
auto_retry_max: int = Field(
default=0,
ge=0,
le=5,
description="最大自动重试次数,0表示不自动重试,最大5次",
)
# ── 输出分辨率 ──
resolution: str = Field(
default="",
description="输出分辨率,格式为 WIDTHxHEIGHT,如 1280x720、1080x1920。为空使用默认 1280x720",
)
# ── 自定义 BGM ──
bgm_config: dict = Field(
default_factory=dict,
description="自定义BGM配置,覆盖模板BGM设置。支持 enabled/source/asset_id/preset_id/audio_url/volume 等字段",
)
# ── 预览 / 确认生成 ──
is_preview: bool = Field(default=False, description="是否为预览任务")
source_task_id: str = Field(default="", description="来源预览任务 ID(确认生成时传入)")
output_width: int = Field(default=1280, description="输出视频宽度")
output_height: int = Field(default=720, description="输出视频高度")
cover_url: str = Field(default="", description="封面图片 URL")
# ── 多变体独立封面(批量生成)──
# 长度 1 = 所有变体共用;长度 = count = 每个变体独立封面;空数组 = 回退 cover_url
cover_urls: list[str] = Field(
default_factory=list,
description="各变体独立封面URL数组:长度1=共用,长度=count=独立。为空时回退 cover_url",
)
# ── 多变体独立标题文字(批量生成)──
# 长度 1 = 所有变体共用;长度 = count = 每个变体独立标题文字;空数组 = 使用 title_config.text
titles: list[str] = Field(
default_factory=list,
description="各变体独立标题文字数组:长度1=共用,长度=count=独立。为空时使用 title_config.text",
)
@model_validator(mode="after")
def _check_variant_arrays(self) -> "CreateGenerationTaskRequest":
"""变体数组字段长度校验:空数组(回退单值)、长度 1(共用)、或长度 = count(独立)。"""
for name in ("voice_library_ids", "cover_urls", "titles"):
arr = getattr(self, name)
if arr and len(arr) != 1 and len(arr) != self.count:
raise ValueError(f"{name} 长度必须为 1(共用)或 {self.count}(与 count 一致),当前为 {len(arr)}")
return self
@model_validator(mode="after")
def _check_at_least_one_mode(self) -> "CreateGenerationTaskRequest":
has_project = bool(self.project_id.strip())
has_template = bool(self.template_id.strip())
if not has_project and not has_template:
raise ValueError("project_id 或 template_id 至少需要提供一个")
has_library = bool(self.asset_library_id.strip())
has_assets = bool(self.asset_ids or self.title_ids or self.voice_ids)
if not has_library and not has_assets:
raise ValueError("asset_library_id 或 asset_ids/title_ids/voice_ids 至少需要提供一个")
return self
class GenerationTaskResponse(BaseModel):
id: str
project_id: str
asset_library_id: str
strategy_id: str
voice_library_id: str
template_id: str = ""
asset_ids: list[str] = Field(default_factory=list)
title_ids: list[str] = Field(default_factory=list)
voice_ids: list[str] = Field(default_factory=list)
source_edit_plan_id: str = ""
asset_select_mode: str = ""
batch_id: str = ""
video_title: str = ""
resolution: str = ""
bgm_config: dict = Field(default_factory=dict)
is_preview: bool = False
source_task_id: str = ""
output_width: int = 1280
output_height: int = 720
cover_url: str = ""
title_config: dict = Field(default_factory=dict)
status: str
progress: float
result_count: int
error_message: str
error_info: dict = Field(default_factory=dict)
retry_count: int = 0
auto_retry_enabled: bool = False
auto_retry_max: int = 0
logs: list[dict] = Field(default_factory=list)
@field_validator("logs", mode="before")
@classmethod
def _parse_logs(cls, v: object) -> list[dict]:
"""将 JSON 字符串解析为 list[dict]。"""
if isinstance(v, str):
try:
parsed = json.loads(v)
return parsed if isinstance(parsed, list) else []
except (json.JSONDecodeError, TypeError):
return []
if isinstance(v, list):
return v
return []
class BatchGenerationTaskResponse(BaseModel):
"""批量生成任务响应。"""
items: list[GenerationTaskResponse]
total: int
class ListGenerationTasksResponse(BaseModel):
"""用户级生成任务列表响应(跨 project)。"""
items: list[GenerationTaskResponse]
# ── 预览生成(Phase 1) ───────────────────────────────────────────────────────
class CreatePreviewGenerationTaskRequest(BaseModel):
"""创建预览生成任务请求。
仅支持模板模式:template_id + asset_ids 等素材 ID 列表。
预览渲染品质与正式生成一致(1080p, CRF 23, medium preset)。
"""
template_id: str
asset_ids: list[str] = Field(default_factory=list)
title_ids: list[str] = Field(default_factory=list)
voice_ids: list[str] = Field(default_factory=list)
voice_library_id: str = Field(
default="", description="配音素材库ID(用户上传的音频或AI配音),对应配音选择页面选择的配音素材"
)
video_title: str = Field(default="", description="生成视频的标题/名称,为空则使用默认命名")
duration: float = Field(default=0.0, ge=0, description="期望视频时长(秒),0 表示由模板决定")
video_ratio: str = Field(default="", description="视频比例,如 16:9 / 9:16,为空使用模板默认")
bgm_config: dict = Field(
default_factory=dict,
description="自定义BGM配置,覆盖模板BGM设置。支持 enabled/source/asset_id/preset_id/audio_url/volume 等字段",
)
preview_count: int = Field(
default=1,
ge=1,
le=10,
description="预览视频生成数量,范围 1-10,默认 1",
)
source_edit_plan_id: str = Field(
default="",
description="关联的编辑计划ID(可选),用于确认生成时复用预览产物",
)
title_config: dict = Field(
default_factory=dict,
description="标题配置(可选),渲染时烧录到预览视频中。支持字段: text/font/font_size/font_color/position/bold/stroke/shadow。N个变体时样式全局共用",
)
# ── 多变体独立配置(preview_count > 1)──
# 长度 1 = 所有变体共用;长度 = preview_count = 每个变体独立;空数组 = 回退单值字段
titles: list[str] = Field(
default_factory=list,
description="各变体独立标题文字数组:长度1=共用,长度=preview_count=独立。为空时使用 title_config.text",
)
voice_library_ids: list[str] = Field(
default_factory=list,
description="各变体独立配音素材库ID数组:长度1=共用,长度=preview_count=独立。为空时回退 voice_library_id",
)
cover_urls: list[str] = Field(
default_factory=list,
description="各变体独立封面URL数组:长度1=共用,长度=preview_count=独立(预览阶段通常为空)",
)
@model_validator(mode="after")
def _check_variant_arrays(self) -> "CreatePreviewGenerationTaskRequest":
"""变体数组字段长度校验:空数组(回退单值)、长度 1(共用)、或长度 = preview_count(独立)。"""
for name in ("titles", "voice_library_ids", "cover_urls"):
arr = getattr(self, name)
if arr and len(arr) != 1 and len(arr) != self.preview_count:
raise ValueError(
f"{name} 长度必须为 1(共用)或 {self.preview_count}(与 preview_count 一致),当前为 {len(arr)}"
)
return self
@model_validator(mode="after")
def _check_template_id(self) -> "CreatePreviewGenerationTaskRequest":
if not self.template_id.strip():
raise ValueError("template_id 不能为空")
return self
@model_validator(mode="after")
def _check_asset_ids(self) -> "CreatePreviewGenerationTaskRequest":
if not self.asset_ids and not self.title_ids and not self.voice_ids:
raise ValueError("asset_ids/title_ids/voice_ids 至少需要提供一个")
return self
class PreviewGenerationTaskResponse(BaseModel):
"""单个预览变体任务响应。
包含任务状态、进度、分辨率、生成结果 URL 等关键字段。
"""
task_id: str
status: str
progress: float
is_preview: bool = True
variant_index: int = 0
resolution: str = ""
video_url: str = ""
duration: float = 0.0
file_size: int = 0
clip_count: int = 0
transition_count: int = 0
material_usage: dict = Field(default_factory=dict)
error_message: str = ""
title_text: str = ""
voice_library_id: str = ""
created_at: datetime | None = None
started_at: datetime | None = None
finished_at: datetime | None = None
generate_duration: float = 0.0
class BatchPreviewGenerationTaskResponse(BaseModel):
"""批量预览任务响应:preview_count=N 时返回 N 个独立变体任务。
- items: 变体任务数组,按 variant_index 顺序排列,每个含独立 task_id/状态/预览视频URL
- total: 变体总数(= preview_count
- 前端按 items[i].task_id 分别轮询 GET /preview/{task_id} 获取进度与结果
"""
items: list[PreviewGenerationTaskResponse]
total: int