Compression (video)

From Higher Computing Science
Jump to: navigation, search

This article is unfinished. Please consider joining and adding to this article. Read about Page layout beforehand.

Key points

  • A video file has a number of factors that affect file size, including resolution, time is seconds and frame rate.
  • The resolution of the image in a video affects the frame storage size in the same way as a still image. Streaming videos often have a low resolution to reduce the file size.
  • Frame rate is the number of frames displayed per second. This can be reduced to make a video file smaller, but under 10 frames per second humans are unlikely to see a series of images as movement. Most videos are 25 frames per second or above.
  • In a video, lossy compression makes files smaller by identifying areas that do not change colour between frames, as well as creating colour blocks or repeating patterns using graphic compression.



Further information

Test yourself

Teaching resources