From 4ebfb078c5af9f31bc0b80e784f04cb1e24cbdc0 Mon Sep 17 00:00:00 2001
From: liupeng <laupeng1989@gmail.com>
Date: Thu, 9 Jan 2025 23:13:11 +0800
Subject: [PATCH] make no beam consistent with backtrack.

---
 whisperx/alignment.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/whisperx/alignment.py b/whisperx/alignment.py
index 872859f..a54faa3 100644
--- a/whisperx/alignment.py
+++ b/whisperx/alignment.py
@@ -543,7 +543,7 @@ def backtrack_beam(trellis, emission, tokens, blank_id=0, beam_width=5):
             break
 
     if not beams:
-        raise ValueError("No valid path found")
+        return None
 
     best_beam = beams[0]
     t = best_beam.time_index