custom_nodes/ComfyUI-VideoHelperSuite/video_formats/h264-mp4.json

{
    "main_pass":
    [
        "-n", "-c:v", "libx264",
        "-pix_fmt", ["pix_fmt", ["yuv420p", "yuv420p10le"]],
        "-crf", ["crf","INT", {"default": 19, "min": 0, "max": 100, "step": 1}]
    ],
    "audio_pass": ["-c:a", "aac"],
    "save_metadata": ["save_metadata", "BOOLEAN", {"default": true}],
    "extension": "mp4"
}