fix: 6 bugs — profile isolation, export stashing, auto-negative guard

- Stash profile and crop_center at export start for async safety
- Scope get_group/delete_group by profile to prevent cross-profile leaks
- Guard auto-negative sampling when no markers exist (prevents flood)
- Wrap ffmpeg subprocess with clean timeout error message
- Fix scan-all panel reload to use stashed profile, not live value
- Remove dead warnings import

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

core/audio_scan.py

@@ -3,7 +3,6 @@
 import hashlib
 import os
 import subprocess
-import warnings
 import numpy as np
 
 from .paths import _bin, _log
@@ -22,7 +21,10 @@ def _load_audio_ffmpeg(path: str, sr: int = _SR) -> np.ndarray:
         "-loglevel", "error",
         "pipe:1",
     ]
+    try:
         proc = subprocess.run(cmd, capture_output=True, timeout=300)
+    except subprocess.TimeoutExpired:
+        raise RuntimeError(f"ffmpeg timed out (300s) on {os.path.basename(path)}")
     if proc.returncode != 0:
         raise RuntimeError(f"ffmpeg failed: {proc.stderr.decode().strip()}")
     return np.frombuffer(proc.stdout, dtype=np.float32)
@@ -240,10 +242,11 @@ def _extract_w2v_targeted(y: np.ndarray, sr: int, gt_intense: list[float],
         # Don't let manual negatives overlap with positives
         manual_neg_times -= pos_times
 
-    # Auto negative windows: every 4s, far from any marker (skip if margin <= 0)
+    # Auto negative windows: every 4s, far from any marker (skip if margin <= 0 or no markers)
     neg_times = set()
+    if all_gt and neg_margin > 0:
         for t in range(0, int(duration - _WINDOW), 4):
-        if neg_margin > 0 and min((abs(t - g) for g in all_gt), default=9999) > neg_margin:
+            if min(abs(t - g) for g in all_gt) > neg_margin:
                 neg_times.add(t)
 
     all_times = sorted(pos_times | neg_times | manual_neg_times)

core/db.py

@@ -159,43 +159,47 @@ class ProcessedDB:
             self._con.execute("DELETE FROM processed WHERE output_path = ?", (output_path,))
             self._con.commit()
 
-    def get_group(self, output_path: str) -> list[str]:
+    def get_group(self, output_path: str, profile: str = "") -> list[str]:
-        """Return all output_paths sharing the same (filename, start_time) as *output_path*."""
+        """Return all output_paths sharing the same (filename, start_time, profile) as *output_path*."""
         if not self._enabled:
             return []
         row = self._con.execute(
-            "SELECT filename, start_time FROM processed WHERE output_path = ?",
+            "SELECT filename, start_time, profile FROM processed WHERE output_path = ?",
             (output_path,),
         ).fetchone()
         if not row:
             return []
+        filename, start_time, row_profile = row
+        p = profile or row_profile
         rows = self._con.execute(
             "SELECT output_path FROM processed"
-            " WHERE filename = ? AND start_time = ? ORDER BY output_path",
+            " WHERE filename = ? AND start_time = ? AND profile = ? ORDER BY output_path",
-            (row[0], row[1]),
+            (filename, start_time, p),
         ).fetchall()
         return [r[0] for r in rows]
 
-    def delete_group(self, output_path: str) -> list[str]:
+    def delete_group(self, output_path: str, profile: str = "") -> list[str]:
-        """Delete all rows sharing the same (filename, start_time) as *output_path*.
+        """Delete all rows sharing the same (filename, start_time, profile) as *output_path*.
         Returns list of deleted output_paths."""
         if not self._enabled:
             return []
         with self._lock:
             row = self._con.execute(
-                "SELECT filename, start_time FROM processed WHERE output_path = ?",
+                "SELECT filename, start_time, profile FROM processed WHERE output_path = ?",
                 (output_path,),
             ).fetchone()
             if not row:
                 return []
-            filename, start_time = row
+            filename, start_time, row_profile = row
+            p = profile or row_profile
             paths = [r[0] for r in self._con.execute(
-                "SELECT output_path FROM processed WHERE filename = ? AND start_time = ?",
+                "SELECT output_path FROM processed"
-                (filename, start_time),
+                " WHERE filename = ? AND start_time = ? AND profile = ?",
+                (filename, start_time, p),
             ).fetchall()]
             self._con.execute(
-                "DELETE FROM processed WHERE filename = ? AND start_time = ?",
+                "DELETE FROM processed WHERE filename = ? AND start_time = ? AND profile = ?",
-                (filename, start_time),
+                (filename, start_time, p),
             )
             self._con.commit()
             return paths

main.py

@@ -3068,7 +3068,7 @@ class MainWindow(QMainWindow):
                 filename, profile, model_label, regions)
             # If this is the currently loaded file, update the panel
             if self._file_path and os.path.basename(self._file_path) == filename:
-                self._scan_panel.load_for_file(filename, self._profile)
+                self._scan_panel.load_for_file(filename, profile)
                 self._timeline.set_scan_regions(regions)
         self._scan_all_next()
 
@@ -3303,11 +3303,13 @@ class MainWindow(QMainWindow):
         short_side = self._spn_resize.value() or None
         self._export_short_side = short_side
         self._export_portrait = "Off"
+        self._export_crop_center = 0.5
         self._export_format = fmt
         self._export_clip_count = 1
         self._export_spread = 0
         self._export_folder = folder
         self._export_folder_suffix = ""
+        self._export_profile = self._profile
 
         hw_on = self._chk_hw.isChecked() and self._hw_encoders
         encoder = self._hw_encoders[0] if hw_on else "libx264"
@@ -3354,7 +3356,7 @@ class MainWindow(QMainWindow):
             fmt=self._export_format,
             clip_count=1,
             spread=0,
-            profile=self._profile,
+            profile=self._export_profile,
             source_path=self._file_path,
         )
         upsert_clip_annotation(self._export_folder, path, label)
@@ -3544,11 +3546,13 @@ class MainWindow(QMainWindow):
         self._export_cursor = self._cursor
         self._export_short_side = short_side
         self._export_portrait = self._cmb_portrait.currentText()
+        self._export_crop_center = self._crop_center
         self._export_format = fmt
         self._export_clip_count = self._spn_clips.value()
         self._export_spread = self._spn_spread.value()
         self._export_folder = folder
         self._export_folder_suffix = folder_suffix
+        self._export_profile = self._profile
 
         self._btn_export.setEnabled(False)
         self._set_subprofile_btns_enabled(False)
@@ -3595,11 +3599,11 @@ class MainWindow(QMainWindow):
             category=category,
             short_side=self._export_short_side,
             portrait_ratio=portrait,
-            crop_center=self._crop_center,
+            crop_center=self._export_crop_center,
             fmt=self._export_format,
             clip_count=self._export_clip_count,
             spread=self._export_spread,
-            profile=self._profile,
+            profile=self._export_profile,
             source_path=self._file_path,
         )
         upsert_clip_annotation(self._export_folder, path, label)