Creation of a .MAI file from a .jpeg file

1°) you need a jpeg file (thumbnail) 80x60:
You can create it using ffmeg and this command line:
ffmpeg.exe -y -i your_video_file -f image2 -ss number_of_the_frame -vframes 1 -s 80x60 -an name_of_jpeg_file
For example it extracts the frame "3" from "test.avi" and creates the file "test.jpg":
ffmpeg.exe -y -i test.avi -f image2 -ss 3 -vframes 1 -s 80x60 -an test.jpg

2°) What is needed:
Select the jpeg file you will use as thumbnail (see 1°)):
Jpeg file to use:

Informations about the movie

Name of the MP4 (or MQV) file: (like M4V00010.MP4 or MOV00010.MQV)
Name of the original file: (like Knight.avi)
Video Width (pixels):
Video Heigth (pixels):
Video Bitrate (kbps):
Audio Bitrate (kbps):
Video length (in seconds):

Disclaimer:
We are (I hope) amongst adults here, so if you tamper the values and put, let's say, foolish data (like an incorrect MP4 filename, those kind of things), don't be surprise if the mai file is not correct, ok ;)