Replace = bytes() by b''.

src/tscut/tscut.py

@@ -2622,7 +2622,7 @@ def extract_pictures(ffmpeg_path:str, input_file:IO[bytes], begin:timedelta, nb_
                '-c:v', 'ppm','-f', 'image2pipe', f'/proc/self/fd/{outfd:d}']
     logger.debug('Executing: %s', command)
 
-    images = bytes()
+    images = b''
     with Popen(command, stdout=PIPE, close_fds=False) as ffmpeg:
         status = ffmpeg.wait()
         if status != 0:
@@ -2650,7 +2650,7 @@ def extract_sound(ffmpeg_path:str, input_file: IO[bytes], begin:timedelta, outpu
     lseek(infd, 0, SEEK_SET)
     set_inheritable(infd, True)
     set_inheritable(outfd, True)
-    sound = bytes()
+    sound = b''
     length = int(nb_channels*sample_rate*4*nb_packets*packet_duration/1000)
 
     command = [ffmpeg_path, '-y', '-loglevel', 'quiet', '-ss', f'{begin}',