How to obtain the frame rate from a XviD (AVI) file?

The following is a hex-ascii dump of the first 300 bytes of an AVI (XviD 
format) file:

|52|49|46|46|8c|79|95|00|41|56|49|20|4c|49|53|54|94|6a|00|00 RIFF.y..AVI 
LIST.j..
|68|64|72|6c|61|76|69|68|38|00|00|00|40|9c|00|00|00|ec|36|00 
[email protected].
|00|00|00|00|10|00|00|00|81|01|00|00|00|00|00|00|01|00|00|00 
....................
|df|9e|01|00|d0|02|00|00|40|02|00|00|00|00|00|00|00|00|00|00 
........@...........
|00|00|00|00|00|00|00|00|4c|49|53|54|3c|69|00|00|73|74|72|6c 
........LIST<i..strl
|73|74|72|68|38|00|00|00|76|69|64|73|78|76|69|64|00|00|00|00 
strh8...vidsxvid....
|00|00|00|00|00|00|00|00|e8|03|00|00|a8|61|00|00|00|00|00|00 
.............a......
|81|01|00|00|df|9e|01|00|10|27|00|00|00|00|00|00|00|00|00|00 
.........'..........
|d0|02|40|02|73|74|72|66|28|00|00|00|28|00|00|00|d0|02|00|00 
[email protected](...(.......
|40|02|00|00|01|00|18|00|58|56|49|44|00|f8|25|00|00|00|00|00 
@.......XVID..%.....
|00|00|00|00|00|00|00|00|00|00|00|00|73|74|72|64|c0|28|00|00 
............strd.(..
|00|00|00|00|bc|02|00|00|90|b2|08|00|2e|5c|76|69|64|65|6f|2e 
.............\video.
|70|61|73|73|00|00|2e|00|70|00|61|00|73|00|73|00|00|00|00|00 
pass....p.a.s.s.....
|00|00|00|00|00|00|00|00|00|00|00|00|00|00|00|00|00|00|00|00 
....................
|00|00|00|00|00|00|00|00|00|00|00|00|00|00|00|00|00|00|00|00 
....................

In this particular case I know that the video has a frame rate of 25 
frames per second. How can I use this dump to obtain the frame rate? 
Note, it is straightforward to obtain the frame rate for an avi msvc 
(CRAM) video file since the data structure is well documented. However, 
I have yet to find any document that defines the data structure for a 
XviD (AVI) file --- if I had access to such a document, I probably would 
not need help.

--V

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