apps/worker/video_processing/unified_render_service.py

@@ -824,6 +824,17 @@ class UnifiedRenderService:
                 )
                 audio_layer.clips.append(vo_clip)
 
+            # replace 模式：静音原视频音轨（main + broll 图层）
+            if tts_config.overlap_mode == "replace":
+                for layer in layers:
+                    if layer.role in ("main", "broll"):
+                        for clip in layer.clips:
+                            clip.config["volume"] = 0
+                logger.info(
+                    "TTS replace 模式：已静音原视频音轨: plan_id=%s",
+                    self.plan.id,
+                )
+
             logger.info(
                 "TTS 配音已添加: plan_id=%s voice_id=%s segments=%d total_%.2fs",
                 self.plan.id,
@@ -889,6 +900,16 @@ class UnifiedRenderService:
             )
             audio_layer.clips.append(vo_clip)
 
+            # 配音素材库默认替换原音：静音原视频音轨（main + broll 图层）
+            for layer in layers:
+                if layer.role in ("main", "broll"):
+                    for clip in layer.clips:
+                        clip.config["volume"] = 0
+            logger.info(
+                "配音素材库：已静音原视频音轨: plan_id=%s",
+                self.plan.id,
+            )
+
             logger.info(
                 "配音素材库音频已添加到 audio 图层: plan_id=%s duration=%.2fs",
                 self.plan.id,

packages/domain/ass_subtitle_builder.py

@@ -147,6 +147,8 @@ def escape_ass_text(text: str) -> str:
     Returns:
         转义后的 ASS 文本
     """
+    # 用户手动换行符（半角/全角斜杠）转为 ASS 硬换行（在自动换行之前优先处理）
+    text = text.replace("／", "\\N").replace("/", "\\N")
     # 将实际换行转为 ASS 硬换行
     text = text.replace("\r\n", "\\N").replace("\n", "\\N").replace("\r", "\\N")
     # 转义大括号（ASS 用它做样式覆盖标签）

tests/unit/domain/test_ass_subtitle_builder.py

@@ -218,6 +218,14 @@ class TestEscapeAssText:
     def test_chinese_text(self):
         assert escape_ass_text("你好世界") == "你好世界"
 
+    def test_slash_converted_to_newline(self):
+        """半角斜杠 / 应转为 ASS 硬换行。"""
+        assert escape_ass_text("标题一/标题二") == "标题一\\N标题二"
+
+    def test_fullwidth_slash_converted_to_newline(self):
+        """全角斜杠 ／ 应转为 ASS 硬换行。"""
+        assert escape_ass_text("标题一／标题二") == "标题一\\N标题二"
+
     def test_backslash_n_in_input(self):
         # 文本里本身有 \n 字符串（不是换行符）
         result = escape_ass_text("\\n")

tests/unit/test_ass_subtitle_builder.py

@@ -190,6 +190,19 @@ class TestEscapeAssText:
     def test_chinese_text(self):
         assert escape_ass_text("你好世界") == "你好世界"
 
+    def test_slash_converted_to_newline(self):
+        """半角斜杠 / 应转为 ASS 硬换行。"""
+        assert escape_ass_text("第一行/第二行") == "第一行\\N第二行"
+
+    def test_fullwidth_slash_converted_to_newline(self):
+        """全角斜杠 ／ 应转为 ASS 硬换行。"""
+        assert escape_ass_text("第一行／第二行") == "第一行\\N第二行"
+
+    def test_mixed_slashes_and_newlines(self):
+        """斜杠和换行符都应转为硬换行。"""
+        result = escape_ass_text("A/B\nC／D")
+        assert result == "A\\NB\\NC\\ND"
+
 
 # ── 时间格式化 ────────────────────────────────────────────────────────────────
 

tests/unit/test_title_render_consistency.py

@@ -10,6 +10,8 @@
 import sys
 from pathlib import Path
 
+import pytest
+
 # Ensure packages is importable
 sys.path.insert(0, str(Path(__file__).resolve().parents[2] / "packages"))
 
@@ -239,3 +241,39 @@ class TestFullStyleConsistency:
         assert int(fields[17]) == 2
         # Alignment = 8 (top)
         assert int(fields[18]) == 8
+
+
+class TestTitleSlashNewline:
+    """用户输入 / 或 ／ 应触发标题换行。"""
+
+    def test_halfwidth_slash_in_title(self):
+        content = build_ass_content(
+            video_width=1080,
+            video_height=1920,
+            video_duration=10.0,
+            title_text="第一行/第二行",
+            title_config={"size": 48},
+        )
+        for line in content.splitlines():
+            if "Dialogue" in line and "TitleStyle" in line:
+                assert "\\N" in line, f"斜杠应转为换行: {line}"
+                assert "第一行" in line
+                assert "第二行" in line
+                break
+        else:
+            pytest.fail("未找到 TitleStyle Dialogue 行")
+
+    def test_fullwidth_slash_in_title(self):
+        content = build_ass_content(
+            video_width=1080,
+            video_height=1920,
+            video_duration=10.0,
+            title_text="第一行／第二行",
+            title_config={"size": 48},
+        )
+        for line in content.splitlines():
+            if "Dialogue" in line and "TitleStyle" in line:
+                assert "\\N" in line, f"全角斜杠应转为换行: {line}"
+                break
+        else:
+            pytest.fail("未找到 TitleStyle Dialogue 行")