参数无效。 位图（）和NReco.VideoConverter.FFMpegConverter（）

Question

I wrote this code but got this msg "Parameter is not valid"

Stream outputS = Stream.Null;
(new NReco.VideoConverter.FFMpegConverter()).GetVideoThumbnail(arrayF[indexF].FullName, outputS);
outputS.Position = 0;
System.Drawing.Image thumb = new Bitmap(outputS);
res[0, 1] = "data:image/jpg;base64," + Convert.ToBase64String(ImageToByte2(thumb));

can anyone help me?!!

Answer 1

The problem is because you pass Stream.Null as output stream for GetVideoThumbnail method (it always will be empty). Try to use MemoryStream:

Stream outputS = new MemoryStream();