public static byte[] SaveImage(this Frame frame, OutputFormat?format = null, string?formatName = null)
{
using FormatContext fc = FormatContext.AllocOutput(format, formatName);
using var io = MediaIO.OpenDynamic();
fc.IO = io;
WriteImageTo(frame, fc);
using var dm = io.GetBufferAndClose();
return(dm.AsSpan().ToArray());
}
