whisper lines capped at 18 chars; retake short takes

kaggle/director_probe.py

@@ -31,6 +31,10 @@ OUT = ROOT / "director"
 
 SLOTS = ["开场", "叙述", "故事", "叙述", "耳语", "耳语"]
 MIN_CHARS, MAX_CHARS = 8, 40
+# Whisper slots get a tighter cap. Measured: 8-15 character whisper lines come
+# out clean, a 24 character one collapsed to 0.4 s of near-silence in both the
+# teacher and the student.
+SLOT_MAX = [40, 40, 40, 40, 18, 18]
 LATIN_OR_DIGIT = re.compile(r"[A-Za-z0-9]")
 ALLOWED = re.compile(r"^[\u4e00-\u9fff，。？！、；：…——“”‘’「」《》]+$")
 
@@ -94,15 +98,15 @@ def parse_script(raw: str) -> list[dict]:
     return out
 
 
-def trim(text: str) -> str:
+def trim(text: str, limit: int = MAX_CHARS) -> str:
     """Cut an over-long line at its last clause boundary under the limit."""
-    if len(text) <= MAX_CHARS:
+    if len(text) <= limit:
         return text
-    cut = text[:MAX_CHARS]
+    cut = text[:limit]
     for i in range(len(cut) - 1, MIN_CHARS - 1, -1):
         if cut[i] in "，。？！":
             return cut[:i] + "。"
-    return cut[: MAX_CHARS - 1] + "。"
+    return cut[: limit - 1] + "。"
 
 
 def check(lines: list[dict]) -> dict:
@@ -113,7 +117,7 @@ def check(lines: list[dict]) -> dict:
         t = l.get("text", "")
         if i < len(SLOTS) and l.get("style") != SLOTS[i]:
             bad.append(f"L{i}:style={l.get('style')!r}")
-        if not (MIN_CHARS <= len(t) <= MAX_CHARS):
+        if not (MIN_CHARS <= len(t) <= SLOT_MAX[min(i, len(SLOT_MAX) - 1)]):
             bad.append(f"L{i}:len={len(t)}")
         if LATIN_OR_DIGIT.search(t) or not ALLOWED.match(t):
             bad.append(f"L{i}:chars")
@@ -182,7 +186,8 @@ def main() -> None:
             # The label is positional anyway (it decides which voice speaks),
             # so relabel by position and repair over-long lines instead of
             # throwing the whole script away.
-            lines = [{"style": SLOTS[i], "text": trim(l["text"])} for i, l in enumerate(r["lines"])]
+            lines = [{"style": SLOTS[i], "text": trim(l["text"], SLOT_MAX[i])}
+                     for i, l in enumerate(r["lines"])]
             if any(LATIN_OR_DIGIT.search(l["text"]) or len(l["text"]) < MIN_CHARS for l in lines):
                 continue
             kept.append({"topic": topic, "lines": lines})
@@ -209,7 +214,7 @@ def main() -> None:
                 best = r
         if best is None:
             raise SystemExit("no script generated")
-        lines = [{"style": SLOTS[i], "text": trim(l["text"])}
+        lines = [{"style": SLOTS[i], "text": trim(l["text"], SLOT_MAX[i])}
                  for i, l in enumerate(best["lines"][:len(SLOTS)])]
         doc = {"model": MODEL_ID, "topic": topic, "tries": attempt + 1,
                "lines": lines}