I made an animation in 24 fps and when I render it, I see quite a few bits that are choppy, rendering in 30fps would improve this. The problem is that makes my movie shorter. To keep it the same length I would have to obviously increase the number of frames, but I would then have to shift all my keyframing by different amounts. Is there any way to automatically adjust this?
Beneath the Frame Rate dropdown in the render panel, there is a time remapping section. Set the old mapping to 24 and the new to 30. For more in-depth info, see here: http://www.ffnn.nl/pages/articles/media/blender-tips-and-tricks.php