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Technology Stocks : Video Conversion -- Ignore unavailable to you. Want to Upgrade?

To: goldworldnet who wrote (29)	3/23/2011 7:24:46 PM
From: goldworldnet	Read Replies (1) \| Respond to of 48

Compressor and QuickTime: About the displayed frame size of MPEG-2 video Last Modified: October 04, 2008 Article: TA23436 Old Article: 302075 support.apple.com Products Affected Final Cut Pro, Final Cut Pro 5.X, QuickTime, DVD Studio Pro 4.0, Final Cut Studio, DVD Studio Pro, Compressor The frame size you see reported for MPEG-2 video may not be accurate in all applications. QuickTime has the ability to play back MPEG-2 content using the QuickTime MPEG-2 Playback Component, which is available as an add-on to QuickTime Player. This component is included with Apple DVD Studio Pro, Final Cut Pro, Motion, and Final Cut Studio. Please note that the frame size reported by the MPEG-2 Playback Component represents the displayed size of the MPEG-2 video—not the actual pixels that comprise the video. This is due to the MPEG-2 format's use of non-square pixels. The QuickTime MPEG-2 Playback Component displays MPEG-2 content in the correct geometrical proportions (4:3). For example, an NTSC MPEG-2 file for DVD-Video is commonly 720 pixels wide and 480 pixels tall. However, 720 x 480 is not equivalent to a 4:3 ratio. This is normal. In DVD playback, the software adjusts the geometry of the MPEG-2 video, scaling the image to the correct proportions. The QuickTime MPEG-2 Playback Component will display a 720 x 480 MPEG-2 video as 640 x 480 to present the correct proportions. QuickTime Player (and some other applications that use QuickTime to display video) will report that the video is 640 x 480, but the actual pixel dimensions are still 720 x 480, conforming to the MPEG-2 specification for DVD-Video. Similarly, PAL MPEG-2 video is displayed in the correct 4:3 aspect at a 720 x 540-pixel resolution, although the actual non-square pixels that comprise the video are really 720 x 576. DVD Studio Pro (included with Final Cut Studio and available separately) can validate an MPEG-2 video file and reveal its actual dimensions. QuickTime Player, Final Cut Pro, and Compressor should not be used to validate an MPEG-2 video's frame size. This document will be updated as more information becomes available. * * *