import sys, numpy as np
from torchcodec.decoders import VideoDecoder
import imageio
d = VideoDecoder(sys.argv[1])
f = d[0].permute(1,2,0).numpy().astype("uint8")
print("train frame shape:", f.shape, "top/bottom mean:", f[:f.shape[0]//2].mean(), f[f.shape[0]//2:].mean())
imageio.imwrite("/out/train_frame.png", f)