优化角色替换

core/backend/apps/ai/video_replace.py

@@ -546,6 +546,10 @@ def serialize_video_replace_task(task, *, include_deleted_assets: bool = False)
         "shot_index": shot_index,
         "shot_total": shot_total,
     })
+    # 火山编辑接口内部用 adaptive/-1；页面仍展示用户实际上传视频的比例和时长。
+    if replace_mode == "character":
+        data["duration"] = int(payload.get("billing_duration") or 0)
+        data["aspect_ratio"] = str(payload.get("billing_aspect_ratio") or data.get("aspect_ratio") or "")
     return data
 
 
@@ -604,7 +608,11 @@ def submit_video_replace(*, team, user, params: dict):
             "说明": "临时上传图片只提供外观，未提供品类、用途或真实卖点。",
         }
 
-    duration = _output_duration(params.get("duration"), video_seconds)
+    # 角色替换是 Seedance 视频编辑:火山要求比例/时长跟随输入视频，不能由前端指定。
+    duration = -1 if replace_mode == "character" else _output_duration(params.get("duration"), video_seconds)
+    billing_ratio = str(params.get("aspect_ratio") or "9:16")
+    if billing_ratio not in RATIOS:
+        billing_ratio = "9:16"
     extra = {
         "replace_mode": replace_mode,
         "subject_name": subject_name,
@@ -612,12 +620,15 @@ def submit_video_replace(*, team, user, params: dict):
         "product_id": str(product_id) if product_id else "",
         "model_id": str(model_id) if model_id else "",
         "product_facts": product_facts,
+        # adaptive / -1 只用于火山请求；预估积分仍按参考视频实际时长和上传时检测出的比例计算。
+        "billing_duration": max(4, int(round(video_seconds or 4))),
+        "billing_aspect_ratio": billing_ratio,
     }
     base_params = {
         "mode": "universal",
         # 固定 Seedance 2.5,不接受前端指定别的档
         "model": REPLACE_MODEL,
-        "aspect_ratio": str(params.get("aspect_ratio") or "9:16"),
+        "aspect_ratio": "adaptive" if replace_mode == "character" else billing_ratio,
         "resolution": str(params.get("resolution") or "720p"),
         "duration": duration,
         "seed": params.get("seed", -1),
@@ -1344,6 +1355,8 @@ def _create_reviewing_task(*, team, user, params: dict, digest_pending: bool = F
     """
     model_name = str(params.get("model") or REPLACE_MODEL)
     aspect_ratio = str(params.get("aspect_ratio") or "9:16")
+    extra = params.get("extra_payload") if isinstance(params.get("extra_payload"), dict) else {}
+    is_character_edit = extra.get("replace_mode") == "character"
     resolution = str(params.get("resolution") or "720p")
     try:
         duration = int(params.get("duration") or 5)
@@ -1351,12 +1364,14 @@ def _create_reviewing_task(*, team, user, params: dict, digest_pending: bool = F
         raise ValueError("时长参数无效")
     if model_name not in FREE_VIDEO_MODELS:
         raise ValueError("模型无效")
-    if aspect_ratio not in RATIOS:
+    if aspect_ratio not in RATIOS and not (is_character_edit and aspect_ratio == "adaptive"):
         raise ValueError("画面比例无效")
     if resolution not in RESOLUTIONS:
         raise ValueError("分辨率无效")
     low, high = replace_duration_range()
-    if not low <= duration <= high:
+    if is_character_edit and duration != -1:
+        raise ValueError("角色替换时长必须跟随参考视频")
+    if not is_character_edit and not low <= duration <= high:
         raise ValueError(f"视频时长需在 {low}-{high} 秒之间")
 
     model_config = (
@@ -1376,11 +1391,13 @@ def _create_reviewing_task(*, team, user, params: dict, digest_pending: bool = F
         raise ValueError(f"当前有 {in_flight} 个视频任务进行中（上限 {max_concurrent}），请等待完成后再提交")
 
     references = params.get("references") or []
+    billing_duration = int(extra.get("billing_duration") or duration)
+    billing_ratio = str(extra.get("billing_aspect_ratio") or aspect_ratio)
     tokens, quote = quote_video_estimate(
         model_config,
-        aspect_ratio=aspect_ratio,
+        aspect_ratio=billing_ratio,
         resolution=resolution,
-        duration=duration,
+        duration=billing_duration,
         references=references,
         team=team,
     )
@@ -1394,7 +1411,6 @@ def _create_reviewing_task(*, team, user, params: dict, digest_pending: bool = F
         seed = int(params.get("seed") if params.get("seed") is not None else -1)
     except (TypeError, ValueError):
         seed = -1
-    extra = params.get("extra_payload") if isinstance(params.get("extra_payload"), dict) else {}
     request_payload = {
         "feature": FEATURE,
         "mode": "universal",
@@ -1405,6 +1421,8 @@ def _create_reviewing_task(*, team, user, params: dict, digest_pending: bool = F
         "aspect_ratio": aspect_ratio,
         "resolution": resolution,
         "duration": duration,
+        "billing_duration": billing_duration,
+        "billing_aspect_ratio": billing_ratio,
         "seed": seed,
         "generate_audio": True,
         "search_mode": "off",