FFMpegCore/FFMpegCore/FFMpeg/Arguments/ConstantRateFactorArgument.cs

using System;

namespace FFMpegCore.FFMPEG.Argument
{
    /// <summary>
    /// Constant Rate Factor (CRF) argument
    /// </summary>
    public class ConstantRateFactorArgument : IArgument
    {
        public readonly int Crf;

        public ConstantRateFactorArgument(int crf)
        {
            if (crf < 0 || crf > 63)
            {
                throw new ArgumentException("Argument is outside range (0 - 63)", nameof(crf));
            }

            Crf = crf;
        }

        public string Text => $"-crf {Crf}";
    }
}