Update detect_frames.py

scripts/detect_frames.py

@@ -87,12 +87,10 @@ def detect(in_seq_dir, out_seq_dir, model, device, verbose):
         'height': height
     }
     print('created object')
-    json_string = json.dumps(json_obj)
-    print('created string')
 
     with open(os.path.join(out_seq_dir, 'pred.json'), 'w') as f:
-        f.write(json_string)
-    print('saved string')
+        json.dump(json_obj, f)
+    print('saved')
 
 def argument_parser():
     parser = argparse.ArgumentParser()