Get Two AVI Video Framerate's to match

[Simmons]

I have two AVI's one long one & one very short one. I am trying to get the short one's framerate to match the long one. But Mediainfo, Virtualdub, even Boilsoft Video Joiner says everything matches & I have tried using AVIDEMUX, Virtual Dub, Virtual Dub MOD to change the framerate of the short one but it does not seem to be updating that it changed & I still get the same error when I try to merge. What is wrong here ?

[El Heggunte]

The files must have the same frame rate AND...

--- same frame dimensions

--- same video codec

--- same audio codec

Regarding the change of frame rate, there exists a command-line tool called tc2cfr.exe, written by a guy named tritical.

[dragonkeeper]

I have done this many times using Virtual Dub.

[sambat]

If VirtualDub gives an error message that lists the framerates with two different hex value ratios (which in decimal give the same result), load each file one at a time in VirtualDub and 'Convert to fps' and insert a value like 25, then save each file with Direct stream copy.
Try and join again and convert back to the original framerate.

[Simmons]

I got it figured out