JUNE 20, 2001
But the RTMac isn't just about real-time. One of the great features of the RTMac system is support for both a studio monitor and a second computer monitor. With PCI real estate what it is today, it's nice to see all of this on a single PCI board. The computer monitor is powered by essentially the same chip you'd find in the Matrox G400 graphics board, though it's certainly not running as it does in stand-alone form. It's a bare-bones graphics processor, but it provides enough power to keep a second screen running at a decent refresh rate, high resolution and fine screen redraw times.
It also comes with a breakout box that includes inputs for composite video (CVBS), S-video (Y/C), mini-DIN and one pair of 48 kHz unbalanced stereo (RCA). Outputs include composite video (CVBS), S-video (Y/C), mini-DIN and one pair of 48 kHz unbalanced audio (RCA).
The card supports multi-format mini DV, DV, DVCAM and DVCPRO NTSC 4:1:1, PAL 4:1:1 and 4:2:0. Video formats include ITU-R 601 YUV 4:2:2, NTSC 720 x 486 at 29.97 frames per second and PAL 720 x 576 at 25 frames per second with 4:3 and 16:9 aspect ratios.
In our work, we have found that the RTMac doesnt like it when you try to apply more than one audio filter or effect simultaneously. If you do, you have to render. Graphics created in Photoshop that include multiple layers need to be rendered. Even enhancing the video, such as increasing the brightness, gamma or chrominance requires you to render.
Dont misunderstand, these render times do not prohibit you from completing your work; it just means you have to approach it differently. In our edit sessions, we often do a rough edit, fine tune it by adding all real time effects and transitions and then do a final tweak where we add all of the non-real-time stuff. Then it off to lunch or dinner or even that all-important carcinogen break. By the time you come back, everything is complete and ready for export back to tape, or as an uncompressed movie for compression in for use on the Web.
One of the other limitations to the RTMac is in the inputs. Currently, the RTMac breakout box has Y/C I/O for video and RCA analog audio and video I/O. While it would drive the cost of the card well beyond $1,000, it would be nice to have a BNC and XLR breakout box as an upgrade option. One nice thing is that you can capture audio/video via the FireWire port on the Mac and still make use of the real-time options of the RTMac.
For more information on the RTMac, visit http://www.matrox.com.
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Dave Nagel is the producer of Creative Mac and Digital Media Designer; host of several World Wide User Groups, including Synthetik Studio Artist, Adobe Photoshop, Adobe InDesign, Adobe LiveMotion, Creative Mac and Digital Media Designer; and executive producer of the Digital Media Net family of publications.
Stephen Schleicher is the producer of DMNTV, Video Systems, Millimeter and Digital WebCast and is the host of the Video Systems, Millimeter and Digital WebCast forums at the World Wide User Groups. He has taught at Fort Hays State University in Hays, Kansas, and at the American InterContinental University in Atlanta, Georgia, where he also ran his own animation company, Thunderhead Productions. Stephen also freelanced in the Atlanta area as a producer/editor for five years working on everything from training videos to live shows.