diff --git a/demo.py b/demo.py
index 2dcbea1..3cb7e75 100644
--- a/demo.py
+++ b/demo.py
@@ -49,9 +49,14 @@ def track(opt):
     n_frame = 0
 
     logger.info('Starting tracking...')
-    dataloader = datasets.LoadVideo(opt.input_video, opt.img_size)
+    if os.path.isdir(opt.input_video):
+        print('Use image sequence')
+        dataloader = datasets.LoadImages(opt.input_video, opt.img_size)
+        frame_rate = 30 # hack for now; see https://motchallenge.net/data/MOT16/
+    else:
+        dataloader = datasets.LoadVideo(opt.input_video, opt.img_size)
+        frame_rate = dataloader.frame_rate 
     result_filename = os.path.join(result_root, 'results.txt')
-    frame_rate = dataloader.frame_rate 
 
     frame_dir = None if opt.output_format=='text' else osp.join(result_root, 'frame')
     try: