fix binary format

replay_pty.py

@@ -75,16 +75,20 @@ def main():
     else:
         delay_per_byte = 0.0
 
+    _CHUNK = 4096
     loop = 0
     try:
         while True:
             loop += 1
             print(f"[loop {loop}] {args.file}")
             with open(args.file, "rb") as f:
-                for line in f:
-                    os.write(master_fd, line)
+                while True:
+                    chunk = f.read(_CHUNK)
+                    if not chunk:
+                        break
+                    os.write(master_fd, chunk)
                     if delay_per_byte > 0:
-                        time.sleep(delay_per_byte * len(line))
+                        time.sleep(delay_per_byte * len(chunk))
     except KeyboardInterrupt:
         print("\nОстановлено.")
     finally: