fixes

sync_audio_test.py

@@ -133,16 +133,16 @@ class ApplySyncWorker(QtCore.QThread):
 
         total_frames, _total_ms = self.probe_video_total(self.video_a)
 
-        # Single merged pipe: apply_sync forwards ffmpeg -progress key=value
-        # lines on stdout; human text has no "=" and is skipped for progress.
+        # stdout pipe carries only the -progress protocol (+ apply_sync's
+        # human log lines, forwarded below). stderr is inherited so ffmpeg's
+        # final summary stays visible in the launching terminal when run via ast.
         proc = subprocess.Popen(
             cmd, cwd=script_dir,
-            stdout=subprocess.PIPE, stderr=subprocess.STDOUT,
+            stdout=subprocess.PIPE, stderr=None,
             universal_newlines=True, bufsize=1
         )
 
         frames_done = 0
-        last_line = ""
         assert proc.stdout is not None
         for line in proc.stdout:
             if self._abort:
@@ -152,7 +152,6 @@ class ApplySyncWorker(QtCore.QThread):
             line = line.strip()
             if not line:
                 continue
-            last_line = line
             if line.startswith("frame="):
                 try:
                     frames_done = int(line.split("=", 1)[1].strip())
@@ -162,13 +161,14 @@ class ApplySyncWorker(QtCore.QThread):
             elif line.startswith("progress=end"):
                 self.progress.emit(total_frames or frames_done,
                                    total_frames or frames_done)
-            elif "=" not in line and ("error" in line.lower() or "failed" in line.lower()):
-                self.status.emit(line)
+            elif "=" not in line:
+                # Human-readable log (File A/B, Lag, Output, Synced output):
+                # mirror to the terminal instead of swallowing it.
+                print(f"[apply_sync] {line}", flush=True)
+                if "error" in line.lower() or "failed" in line.lower():
+                    self.status.emit(line)
 
         rc = proc.wait()
-        # Keep ffmpeg's final summary line visible in the launching terminal.
-        if last_line:
-            print(f"[apply_sync] {last_line}", flush=True)
         self.finished.emit(rc == 0)