Update app.py

app.py

@@ -86,6 +86,12 @@ def step1_trim(video_path, seconds, fps, state):
         "-r", str(fps),      # user-specified fps
         trimmed
         ], check=True, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
+
+        all_output = []
+        
+        for line in p.stdout:
+            print(line, end="")   # real-time echo
+            all_output.append(line)
         
     except subprocess.CalledProcessError as e:
         # e.stdout contains everything