fix for negative crop with autocrop

anime_audio_encoder.py

@@ -270,17 +270,21 @@ def _snap_to_known_ar_cropdetect(w, h, x, y, video_w, video_h, tolerance=0.03):
         new_h = round(video_w / best_match['ratio'])
         if new_h % 8 != 0:
             new_h = new_h + (8 - (new_h % 8))
+        new_h = min(new_h, video_h)
         new_y = round((video_h - new_h) / 2)
         if new_y % 2 != 0:
             new_y -= 1
+        new_y = max(0, new_y)
         return f"crop={video_w}:{new_h}:0:{new_y}", best_match['name']
     if abs(h - video_h) < 16:
         new_w = round(video_h * best_match['ratio'])
         if new_w % 8 != 0:
             new_w = new_w + (8 - (new_w % 8))
+        new_w = min(new_w, video_w)
         new_x = round((video_w - new_w) / 2)
         if new_x % 2 != 0:
             new_x -= 1
+        new_x = max(0, new_x)
         return f"crop={new_w}:{video_h}:{new_x}:0", best_match['name']
     return f"crop={w}:{h}:{x}:{y}", None