From Wikipedia's article on 'Baraka:'
"Following previous DVD releases, in 2007 the original 65 mm negative was re-scanned at 8K (a horizontal resolution of 8192 pixels) with equipment designed specifically for Baraka at FotoKem Laboratories. The automated 8K film scanner, operating continuously, took more than three weeks to finish scanning more than 150,000 frames (taking approximately 12–13 seconds to scan each frame), producing over 30 terabytes of image data in total. After a 16-month digital intermediate process, including a 96 kHz/24 bit audio remaster by Stearns for the DTS-HD Master Audio soundtrack of the film, the result was re-released on DVD and Blu-ray Disc in October 2008. Project supervisor Andrew Oran says this remastered Baraka is "arguably the highest quality DVD that's ever been made". Chicago Sun-Times critic Roger Ebert describes the Blu-ray release as "the finest video disc I have ever viewed or ever imagined.""