[engine]视频中的平滑感

Posted 2022-04-01 安柏霖

smoothVideo

https://frames-per-second.appspot.com/
最近看画面流畅相关的内容，这个文章蛮好的；
简单讲，就是

• 帧数高
• 有适当的motion blur
  会让画面流畅感上升；
  尤其是里面的对比视频就比较好，可以有一个很直观的感受；

这里也直接文字记录下：

Frame rate and motion blur are important aspects of video quality. This demo helps to show the visual differences between various frame rates and motion blur.
Motion blur is a natural effect when you film the world in discrete time intervals. When a film is recorded at 25 frames per second, each frame has an exposure time of up to 40 milliseconds (1/25 seconds). All the changes in the scene over that entire 40 milliseconds will blend into the final frame. Without motion blur, animation will appear to jump and will not look fluid.

When the frame rate of a movie is too low, your mind will no longer be convinced that the contents of the movie are continuous, and the movie will appear to jump (also called strobing).

More information:

Wikipedia's frame rate article includes information about the history of frame rates, frame rates in video games, etc.
Wikipedia's rotary disk shutter article includes information about the shutters used in motion picture cameras.
RED Digital Cinema has an excellent article on the benefits of high frame rates (HFR), including sample videos and discussion.
Peter Jackson said the following about switching to 48 frames per second for the filming of The Hobbit (2011/04/11):

Film purists will criticize the lack of blur and strobing artifacts, but all of our crew--many of whom are film purists--are now converts. You get used to this new look very quickly and it becomes a much more lifelike and comfortable viewing experience. It's similar to the moment when vinyl records were supplanted by digital CDs. There's no doubt in my mind that we're heading towards movies being shot and projected at higher frame rates.