4/10/2021 0 Comments Prores 422 Proxy
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.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 Avids DNxHD codec or CineForm which offer similar bitrates and are also intended to be used as intermediate codecs. ProRes is a DCT scalar based 3 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, 4 after Blackmagic Design implemented compressed Bayer as CinemaDNG 3:1 and CinemaDNG 4:1 in their cameras and DaVinci Resolve. All ProRes422-variants use Chroma subsampling of 4:2:2 at 10 Bit Color depth. ![]() It shares many features with other, 422, codecs of Apples ProRes family but provides better quality than 422 HQ in colour detail. It has a target data rate of approximately 330 Mbits for 4:4:4 sources at 1920x1080 and 29.97 fps. It is built upon the same technology as other ProRes codecs, but is directly applied to the raw data coming from the sensor, thus delaying the debayering process to the post-production stage. ProRes RAW therefore aims at quality and better colour reproduction, rather than performance. Without Final Cut Pro installed, QuickTime Player can also be used to capture ProRes 422 video from any compatible attached camera, using the Maximum quality setting when producing a Movie Recording. The system must be running on Windows Server 2008 and be able to support this feature. ProRes video capturing and output to tape is available in Telestreams Pipeline network encoder. Library of Congress. November 2014. Retrieved 13 October 2019. ProVideo Coalition. Archived from the original on 2009-03-12. By using this site, you agree to the Terms of Use and Privacy Policy. Wikipedia is a registered trademark of the Wikimedia Foundation, Inc., a non-profit organization.
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