Update app.py

app.py

@@ -48,7 +48,7 @@ def iter_clips(video_path, num_segments=4, stride_size=16):
     max_start_frame = len(vr) - frame_sample_size
     curr_frame = 0
     fps = vr.get_avg_fps()
-    while curr_frame != 0 and curr_frame < max_start_frame:
+    while curr_frame == 0 or curr_frame < max_start_frame:
         stop_frame = min(frame_sample_size, len(vr))
         curr_sec, stop_sec = curr_frame / fps, stop_frame / fps
         frame_ids = get_frame_ids(curr_frame, stop_frame, num_segments=num_segments, jitter=False)