how to create a bitmap from intptr using c#

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C#

video

Bitmap

i am making a video stegnaography project in which i got the clone of the selected frames from the video and then i have to replace these embedded frames with the real frames in the video...i have used the avifile library so far and i use the cut function in the avi library...the cut function actually cut the a video stream of the given lenght but i have to cut on frame at a time ....the function returns a intptr ...i tried to make a bitmap from that intptr by using over loaded bitmap constructor...i am using c#.....

p = editableStream.Cut(156, 157); Bitmap b = new Bitmap(300, 300, 400, PixelFormat.Format24bppRgb, p);

when i try to save the bitmap then it show the exception ...A generic error occurred in GDI+.

b.Save(@"D:\MCS _2\New folder\aaaa.jpg", ImageFormat.Jpeg);