After Effects rendering a video at base 99, but outputs as a 60 one I've got a composition with only a video that was recorded at 100 fps. Apparently 100 fps is to much for AE, but it deals just fine with 99, which is OK to me.



The composition was set with exactly the same settings as the video. But when I render this, even choosing Best Settings or Current Settings, both with base 99 (Use comp's frame rate option) it outputs a 60 fps video.

I didn't even set 60 anywhere else, I do not know from where it is coming. But the thing is, I need to output it as 100/99 fps.

And if you think, "Why can't you just stay with the original video?" Because this is just a test, and for now it is failing
Since your source is in h264 I'm guessing you are encoding to mp4/h264 again?
The format doesn't support a frame rate of 99, you will have to use a less constrained video codec like mjpeg in an avi or mov container.

Whenever you are violating certain video or audio specs After Effects will tell you that in your export settings like shown here (see the little warning triangle in the left corner). AME doesn't do that for some reason but will show the adjusted settings in the source output info field.