Lossless means truly lossless: pixels are exactly the same as in the uncompressed file. Note that by lossless I don’t mean visually lossless. All of these would benefit from some kind of (lossless) compression.
Adobe dng converter mac 5.5 update#
Update April 2015: I now have a much better solution for CinemaDNG/DNG lossless compression, which solves all the issues mentioned here.Ĭurrently there are a quite a lot of cameras that shoot uncompressed raw DNG/CinemaDNG video, or processes which end up with DNG video sequences: Blackmagic Design Cinema Camera, Digital Bolex, Ikonoskop A-Cam DII, Kinefinity first generation cameras, Canon Magic Lantern raw video, Sony FS700 + Convergent Design Odyssey 7Q, etc. Lossless DNG compression allows a reduction in video file size while preserving all the benefits of a raw post workflow.
This article describes an alternative simple workflow for lossless compression of DNG/CinemaDNG video footage, and also introduces DNGStrip – an utility that’s used to optimize file size. The downside of this approach is that a bit of image integrity and re-processing options are ultimately sacrificed in lossy compression, which is not exactly the goal of optimal archiving and image quality. One way of handling the size problem in post-production is to do some initial adjustments on the raw video, then bake to a lossily compressed format like ProRes, DNxHD or Cineform and only keep the compressed video for further post and/or archiving of the source material. Uncompressed raw video can quickly add up and fill storage. There are a lot of good things about raw video but data size is not amongst them.
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