You should be able to do this with either Cinema Tools or Compressor.
Open the file in Cinema Tools and use the “Conform” button to change it to 23.98 or 24.
If you can’t open it in CT, then bring it into Compressor, select the output codec you want, then change the frame rate. In the bottom of the “Frames” tab and check the box for “So source frames play at 23.98fps”.
Arnie
Post production is not an afterthought!
https://www.arniepix.com/