Apple ProRes is a high quality, lossy video compression format developed by Apple Inc. for use in post-production that supports up to 8K. It is the successor of the Apple Intermediate Codec and was introduced in 2007 with Final Cut Studio 2. The ProRes family of codecs use compression algorithms based on the discrete cosine transform (DCT) technique, much like the H.26x and MPEG standards. ProRes is widely used as a final format delivery method for HD broadcast files in commercials, features, Blu-ray and streaming.
ProRes is a line of intermediate codecs, which means they are intended for use during video editing, and not for practical end-user viewing. This is achieved by only using intra-frame compression, where each frame is stored independently and can be decoded with no dependencies on other frames. The benefit of an intermediate codec is that it offers excellent random access performance in post-production applications, and retains higher quality than end-user codecs while still requiring much less expensive disk systems compared to uncompressed video. It is comparable to Avid's DNxHD codec or CineForm which offer similar bitrates and are also intended to be used as intermediate codecs. ProRes is a DCT scalar based intra-frame-only codec and is therefore simpler to decode than distribution-oriented formats like H.264. In 2018 Apple added a new "ProRes RAW" (compressed Bayer filter) to Final Cut Pro X, after Blackmagic Design implemented compressed Bayer as "CinemaDNG 3:1" and "CinemaDNG 4:1" in their cameras and DaVinci Resolve.