Zdravím
Mám takovou funkci na konverzi formátu

function BMPtoJPG(var BMPpic, JPGpic: string):boolean;
var Bitmap: TBitmap;
    JpegImg: TJpegImage;
begin
  Result:=False;
  Bitmap := TBitmap.Create;
  try
   Bitmap.LoadFromFile(BMPpic) ;
   JpegImg := TJpegImage.Create;
   try
    JpegImg.Assign(Bitmap) ;
    JpegImg.SaveToFile(JPGpic) ;
    Result:=True;
   finally
    JpegImg.Free
   end;
  finally
   Bitmap.Free
  end;

BMPtoJPG('C:\webcam.bmp','C:\webcam.jpg');

[Error]Constant object cannot be passed as var parameter