Update app.py

app.py

@@ -4,6 +4,7 @@ import ffmpeg
 import tempfile
 import os
 import shutil
+import subprocess
 
 def save_uploaded_file(uploaded_file):
     try:
@@ -22,8 +23,14 @@ def add_hard_subtitle_to_video(input_video_path, subtitle_file_path):
         output_video,
         vf=f"subtitles={subtitle_file_path}:force_style='FontName=Arial,FontSize=24'"
     )
-    ffmpeg.run(stream, overwrite_output=True)
-    return output_video
+    try:
+        # Use subprocess to capture stdout and stderr
+        out, err = ffmpeg.run(stream, overwrite_output=True, capture_stdout=True, capture_stderr=True)
+        return output_video
+    except ffmpeg.Error as e:
+        # Print stderr to Streamlit to help diagnose the issue
+        st.error(f"FFMPEG error: {e.stderr}")
+        return None
 
 def video_demo(video, subtitle):
     video_path = save_uploaded_file(video)