Need some help about avidemux

[mynameisnone]

Hi. I messed up something and need your help.

I had an long mkv file (avc1 codec) and cut it into a small file using Avidemux without re-encoding it. (copy option)
I played the small video file later and found out that I accidentally chose the wrong muxer.
I didn't changed the muxer option to mkv muxer, so the file was saved using the default opion, avi muxer instead.
As a result, fps of the video is totally messed up.

The problem is , I already deleted the original file, so I can't re-do the cutting process again.
I can load the avi-muxed mkv file into avidemux, save it again using mkv muxer, but fps is still messed up.
Is there any way I can fix it up?

[mynameisnone]

never mind. I figured it somehow.

[Baldrick]

How?

[mynameisnone]

I thought the problem was the container, not the video and audio streams since I used the copy option.
So I extracted those streams using ffmpeg, then re-combine them with mkvtoolnix.
Now the video file works fine, at least for me.

[Baldrick]

Thanks for posting the solution. It might help others.