/// <summary>
/// Watermark a video
/// </summary>
/// <param name="input"></param>
/// <param name="output"></param>
/// <param name="watermark"></param>
/// <param name="beforeInput"></param>
/// <param name="beforeOutput"></param>
/// <returns></returns>
public static async Task <bool> WatermarkAsync(string input, string output, Watermark watermark,
Dictionary <string, string> beforeInput = null,
Dictionary <string, string> beforeOutput = null)
{
if (watermark != null)
{
beforeOutput = beforeOutput ?? new Dictionary <string, string>();
beforeOutput["-vf"] = watermark.Color == Color.Empty
? $"'movie={watermark.Picture}[wm]; [in][wm]overlay={watermark.X}:{watermark.Y}[out]'"
: $"'movie={watermark.Picture},colorkey=0x{watermark.Color.ToArgb().ToString("X").Substring(2)}:{watermark.Similarity}:{watermark.Blend} [wm]; [in][wm]overlay={watermark.X}:{watermark.Y}[out]'";
}
return(await ExecuteFfmpegAsync(input, output, beforeInput, beforeOutput));
}