import os
import subprocess

# 视频目录
video_dir = r"C:\Users\yang2\Desktop\rebuttal\len_ab\TCR\m30"

# 要处理的视频文件列表
video_files = ["n1.mp4", "n2.mp4", "n3.mp4"]

for video in video_files:
    input_path = os.path.join(video_dir, video)
    output_path = os.path.join(video_dir, f"h264_{video}")  # 输出文件名

    print(f"GPU converting {input_path} -> {output_path} ...")

    cmd = [
        "ffmpeg",
        "-hwaccel", "cuda",          # 启用 GPU 加速
        "-i", input_path,
        "-c:v", "h264_nvenc",        # 使用 NVIDIA GPU 的 H.264 编码器
        "-preset", "fast",           # 编码速度：fast/balanced/slow
        "-cq", "23",                 # 质量控制：越小质量越高（类似 CRF）
        "-an",                       # 移除音频
        output_path
    ]

    subprocess.run(cmd, check=True)

print("✅ All videos converted to H.264 using GPU.")