About Uncompressed Video
Video that has no compression applied can be unwieldy, so it is only used for the
highest-quality video work, such as special effects and color correction at the last stage
of a project. Most professional projects have an offline phase that uses compressed
video and then an online, finishing phase that uses uncompressed video recaptured at
full resolution. Uncompressed video requires expensive VTRs and large, high-speed
hard disks.