Digital Video - November 2007 - (Page 44) MASTER & COMPRESSOR INSIDE SPECIALTY ENCODING TOOLS FOR HIGH-DEF DISC AND DIGITAL CINEMA. An individual frame with an overlay of the motion vectors used in sub-macroblock detail. You can analyze how the motion vectors are doing—given that the plane in the image is moving quickly over a changing background, perhaps the default search range is too small, causing macroblock errors. SPEED AND ANGELS, COURTESY SALIENT MEDIA BY DAVID O. WEISSMAN T hinking of encoding for Blu-ray, HD DVD, or digital cinema? Compressing video for the big screen using H.264 (aka AVC, the Advanced Video Codec), VC-1 and the JPEG-2000 codecs brings a slew of new concepts and workflow adjustments. A LITTLE BACKGROUND My own video compression journey started with CD-ROM in the early 1990s, the Web a couple of years later, and DVD soon after that. Last year, I started preparing documentaries and features for home theater and digital cinema, using the new codecs on the market. Up until recently, I was using such general-purpose compression apps as Episode Pro and Sorenson Squeeze for these tasks. The former has an impressive set of adjustments for encoding H.264, and the latter does an excellent job with MPEG-2 in HD frame sizes up to 1920x1080. However, there are certain projects best suited for a specialized compression system. If you want to guarantee an encode that’s compliant with HD DVD or Blu-ray (or both), these targeted encoders are the ticket. Then there’s digital cinema. One of my clients, Spellbound Productions, had its doc- 44 dv november 2007 www.dv.com http://www.dv.com
For optimal viewing of this digital publication, please enable JavaScript and then refresh the page. If you would like to try to load the digital publication without using Flash Player detection, please click here.