Як зробити motion blur в sony vegas

HOW TO ADD MOTION BLUR EFFECT IN YOUR VIDEO?

Adding Blur Effect to Create Natural-Looking Picture

Though it seems counterintuitive, natural-looking motion needs a certain amount of blur. It comes from how we perceive motion in the real world. Our eyes see continual movement, and if something moves quickly, it looks to us like a blur.

Moving video does not always have the right amount of blur, though, especially in elements that we create ourselves, like moving text or graphics. When that happens, the motion might not always look natural.

So what do we do about it? We add motion blur. Motion blur provides the natural blurring we see in the real world every day, but is not there when we keyframe text or graphics, or even if we shoot video with a high shutter speed. Do not worry; we’ll explain all that, but first, let us assure you that VEGAS Pro has you covered with its built-in motion blur tools.

In this tutorial, we’ll explore motion blur and why we need to add it to certain footage or graphic elements.

Then, in VEGAS Pro, we’ll follow these steps for adding the motion blur we need:

STEP 1: Set Up Your Project

STEP 2: Set Motion Blur Type

STEP 3: Open Video Bus Track

STEP 4: Insert Motion Blur Amount Envelope

STEP 5: Set Motion Blur Amount

STEP 6: Supersampling

Let’s get right to it and explore what motion blur is, why you want it, and how to apply it in VEGAS Pro!

WHY MOTION BLUR?

As we said above, motion blur is essential for natural-looking movement. It comes down to how we see in nature. Our eyes see motion blur whenever any object moves. We see movement as a continuous process, and as such, we naturally see some blur when things move.

Motion picture, though, including video, does not work that way. Motion picture is a succession of still images which go by quickly enough that our eyes are tricked into seeing motion when there really is not any.

For natural-looking movement, then, motion picture needs some blur. Footage with no motion blur can look staccato or choppy. Moving objects seem to jerk from place to place rather than move smoothly between them.

The effect can be obvious, like watching a flip book or a video game with dropped frames, or it can be almost imperceptible, but you can still see there’s something unnatural about the movement.

Normally, motion blur can be achieved in motion picture through shutter speed. The shutter speed is how long each frame in a motion picture stream is exposed. In film, the shutter speed is usually expressed by a degree measurement, denoting how much of a wedge is cut out of the film camera’s circular, rotating shutter. But in video, it’s expressed as a fraction of a second, the amount of time of exposure.

WHY MOTION BLUR?

The cinematic motion we’re used to seeing in movies comes from a frame of video being exposed for half of the duration of the frame. This came about because film cameras often used a 180-degree shutter, which meant that half of the shutter was cut out, exposing the frame for half of the time. If we want motion which feels cinematic, we often want the same amount of motion blur.

In video, expressed as a fraction, if the frame rate is 24 frames per second, then each frame lasts for 1/24 th of a second. So, half of the duration of the frame is 1/48 th of a second. A comparable shutter speed for video, then, is 1/48. Shooting 24 fps video with a shutter speed of 1/48 should give you the same cinematic motion blur as a 24 fps film with a standard 180-degree shutter.

At other frame rates, such as 30 or 60 fps, the motion blur would be attained at shutter speeds of 1/60 or 1/120, respectively. This matters if you want to slow down 30 fps or 60 fps footage to 24 fps for slow motion.

These shutter speeds yield the correct motion blur for 24 fps slow motion and will match the motion blur of the rest of the full-speed 24 fps footage.

Faster shutter speeds, like 1/250, 1/500, or faster, reduce motion blur, to the point where there is no blur at all. As we said, this can make footage look choppy and unnatural, but it may be ideal if you want to pull crisp still images out of footage. Be aware that the faster the shutter speed, the more light is required for a proper exposure.

Slower shutter speeds yield more motion blur, because the longer a frame is exposed, the more objects move during the exposure. While too little motion blur can lead to choppy-looking footage, too much can make objects appear «streaky» or «ghostly.» That’s not what you want for natural-looking motion, but it could be useful as a visual effect.

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