When testing with the built‑in video, the output appears overall washed‑out with horizontal stripes.

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I have downloaded your weights and project code, and tested the built‑in video in no‑ref mode. Could you please explain why my output video is dim/washed‑out and contains horizontal stripes?
CUDA_VISIBLE_DEVICES=0 python sparkvsr_inference_script.py
--input_dir ./SparkVSR-main/test_input
--model_path ./SparkVSR-stage2
--output_path ./SparkVSR-main/output
--is_vae_st
--ref_mode no_ref
--upscale 4

In addition, I also tried running with the Ref model. The left side shows my original video, and the right side shows the output from SparkVSR. These issues still persist.