framerate/frames per second (fps)
Framerate: how frequently the images in a video update. Each image in a video is a frame,and the images update many times per second. The framerate is measured in frames per second (fps) and the FPS tells you how many images appear in that second.
In the 'flip book" image above, each page is a frame, and the 'video' updates as fast as the user is able to flip through the pages.
What are common framerates used today?
- Film is typically recorded at 24 fps.
- TV is typically 29.97 FPS or 59.94 FPS. The values were initially 30/60 - based on the common electrical frequency of 60Hz, but an artifact in black and white televisions was removed by lowering the frame rate by 0.1%, and as a result, these framerates are still common today.
- Video games are typically played at 60 fps. With fast motion, it is important to not have any jank or lag in the visuals, and it was found that 60FPS was best for gaming.
- Cartoons: Cartoons are often 'inked' at 8 or 12 frames per second, and then repeated on screen multiple times to reach the 24 fps expected by viewers.
FPS at api.video
Each video is encoded into multiple sizes, and we have optimized the framerate The frames per second varies by the size of the video, and as the video dimensions get larger, so does the potential fps of the video:
- 240p: 18 fps
- 360p: 24 fps
- 480p: 24 fps
- 720p: 24 fps
- 1080p: 30 fps
- 4k: 60 fps