Video Editing Course
About Lesson

Video rendering is the process by which a computer processes information from a coded data source and uses that information to produce and display an image. Computer code may include instructions for creating images and word-for-word playback movies or it may provide a set of guidelines that a computer uses to create a custom image such as a web page. Video rendering can be one of the most demanding of computer hardware, especially when done in real-time



Real-Time Rendering vs. Advanced Rendering

Any computer shown on the screen is delivered in real-time: The computer collects all the coded data fast enough to display and update images without noticeable delay. However, a computer can only provide the complexity of so much content at once in order to maintain the concept of real-time rendering. The term translation is used in video editing and processing to describe a computer that takes extra time to render images and produce a full-fledged real-time video playback version. For example, the Pixar or Puerto Rico cartoon movie has some very complex models that the computer can produce in real-time, so the computer provides the content in advance for real-time viewing.

Motion Graphics vs. 3D Graphics

In addition to the previously recorded full animated video, computers can provide animation and 3D graphics. Animation usually works with two-dimensional objects and 3D images work with polygons and other three-dimensional objects. The animation uses a combination of objects, images, videos, and animation techniques to create video content. 3D graphics are different in that the computer renders video around three-dimensional objects in a three-dimensional space. For example, the oldest pixel/sprite video game from the 1980s uses animation while the three-dimensional game in the modern system uses 3-D images. Additional size does not match better image quality.

Adding Data Layers

Items such as brightness, blur, display, shadows, and other visual effects are added to the video provided with additional layers. It can take a lot of time for a 3D artist to redraw the shadow of an object as it moves in relation to the light source: Instead, the computer uses calculations based on the visible light source and the physical object to create the shadow. The visible light source and the corresponding shadow are different layers in the video. Both motion and 3D rendering are two-dimensional presentations of space – adding layers to both can give an indirect view of depth.

GPU in Rescue

The computer processor does not run on video delivery alone. Graphics units, or GPUs, which are hardware partners in computer-based processing units, or CPUs, are best suited to manage complex video translation tools. CPUs are designed to handle large tasks very quickly at one time, while GPUs are designed to handle thousands of small tasks at once. Video rendering is a series of small tasks, making the GPU better suited for the task.

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