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®
24p and
Panasonic AG-DVX100 and AJ-SDX900
camcorder support
in Vegas and DVD Architect Software
Revision 3, Updated 05.27.04
The information contained in this document is subject to change without notice and does not represent a commitment on the part of
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Table of Contents What is covered in this document? Background ................................................................................................................................................................. 3 Vegas ........................................................................................................................................................................... 5 DVD Architect..........................................................................
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Background While NTSC video runs at about 59.94 interlaced fields per second, film runs at 24 full frames per second. When film is transferred to video, a process known as 2-3 pulldown is used. The first film frame is copied into 2 video fields, the second film frame into 3 video fields, and then the process is repeated for the entire film. Every 4 film frames become 10 video fields, or 5 video frames. Due to the 59.94 field rate, the playing time of the video is about 0.1% longer than t
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The Panasonic AG-DVX100 The Panasonic AG-DVX100 is a prosumer camcorder that, in addition to being able to shoot 60i and 30p video, can shoot 24 fps “film rate” progressive video. Since the DV format is not able to store 24 fps directly, the camera does pulldown on the fly and records 60i video to tape. Even before the 4.0b update, Vegas was able to edit this video; however, the editing was in 60i, so all titles, transitions, and effects were rendered at 60i and did not have the same fr
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Vegas Vegas has always been able to edit 24p, but previously did not offer reading or writing 24p DV format files. The 4.0b update added 24p support to the AVI / DV format, including specific support for the Panasonic 24p cameras, as well as a new ruler format and project frame rate to make workflow even smoother. The external monitor and print- to-tape features have also been updated for 24p DV support. Project settings When pulldown is removed, 24p in NTSC runs at about 23.976 fps. Vega
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Prerenders The same 24p DV templates are available for prerenders. You should match the prerender format to your project format and use the 2-3-3-2 pulldown mode for 24p projects for efficiency. External Monitor The external monitor feature will automatically insert 2-3-3-2 pulldown for 24p projects. Print to Tape The print video to DV tape feature offers the new 24p templates during the conform step. This selects which pulldown will be inserted during printing. However, since we recomm
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DVD Architect 24p on DVD Putting 24p instead of 60i on DVD offers up to 20% more efficiency, which can be used for storing more video on a DVD or for a higher bitrate (and therefore better quality) video. For these and other reasons, many people are interested in putting 24p on DVD, just like the movies you can buy or rent on DVD. While the MPEG-2 standard supports “progressive” frames at arbitrary frame rates, the DVD specification does not allow it. NTSC DVD MPEG-2 is strictly 60i. How
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Questions and Answers What do “i” and “p” stand for in 24p, 60i, 25p? The “p” stands for “progressive” or full frames, where every pixel in the frame represents the same instant in time, just like a frame of film. The “i” stands for “interlaced,” a form of video where half of the scan lines (every other one) represent a moment in time halfway between frames. Each half-frame is called a field. 30p and 60i represent the same number of lines per second, but 30p has 30 whole frames per second
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How do I convert NTSC 24p DV into 25p PAL video? If you want your project to be the same length, just render to the “PAL DV” template with no changes. Vegas will do field rendering and frame blending, which will look just fine. If you want to match the way feature films are transferred to PAL, follow these steps: 1. Render your 24p project using the “NTSC DV 24p (inserting 2-3-3-2 pulldown)” template. 2. Start a new project using the “NTSC DV 24p (720x480, 23.976 fps)” template. 3. On t
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5. Select all 60i media and choose “Edit > Switches > Disable Resample.” 6. On the Video tab of the Project Properties dialog, set Deinterlace method to “Interpolate fields” (for fast motion clips) or “Blend Fields” (for clips without fast motion, for increased vertical detail). 7. Edit your project. 8. Render your project: • For prerenders, use the “NTSC DV 24p (inserting 2-3-3-2 pulldown)” template. • For final AVI/DV renders, use the “NTSC DV 24p (inserting 2-3 pulldown)” template. •
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