Neither of those things you said are true. Both still cameras and video cameras capture light for some nonzero length of time to form each frame. This is called shutter speed. Objects that move during this short duration will show up in the still/frame but be blurry.
Both what I said and what you said are true and not mutually exclusive. If it's only in frame between the end of taking one frame and the beginning of taking the next, it won't show up.
And especially with a rolling shutter if the bullet enters and exists the frame before the rolling shutter has gotten down to it, it won't show up.
Neither of those things you said are true. Both still cameras and video cameras capture light for some nonzero length of time to form each frame. This is called shutter speed. Objects that move during this short duration will show up in the still/frame but be blurry.
Both what I said and what you said are true and not mutually exclusive. If it's only in frame between the end of taking one frame and the beginning of taking the next, it won't show up.
And especially with a rolling shutter if the bullet enters and exists the frame before the rolling shutter has gotten down to it, it won't show up.