Update app.py

app.py

@@ -38,7 +38,7 @@ def encode_video(video_path):
     vr = VideoReader(video_path, ctx=cpu(0))
     sample_fps = round(vr.get_avg_fps() / 1)
     frame_idx = [i for i in range(0, len(vr), sample_fps)]
-    if len(frame_idx) > MAX_NUM_FRAMES:
+    if len(frame_idx) > MAX_FRAMES:
         frame_idx = uniform_sample(frame_idx, MAX_FRAMES)
     frames = vr.get_batch(frame_idx).asnumpy()
     frames = [Image.fromarray(v.astype('uint8')) for v in frames]