Autodesk 64006-051108-9001 User Guide - Page 74

Using Intelecine, Adaptive

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66 Chapter 6: Pre-processing Using Intelecine To use the Intelecine process with material that was originally shot on film and then transferred to NTSC video: 1. From the Settings window > Image tab menu, choose Intelecine. 2. In the Encode tab, select the desired frame rate. For the smoothest playback, specify the original 24 fps. If you are producing lower frame rate movies from film source, use 12 fps, which is every other frame of your source. Using frame rates that divide evenly into your original frame rate with no remainder generally produces the smoothest motion in the final movie. Using odd rates, such as 15 fps from 24 fps source, causes uneven motion. See "Frame Rate" on page 181 for more details. To use Intelecine, you must start with interlaced, full frame rate source. Because of this, you should capture the source at full frame size (640x480 or 720x486) and full frame rate (29.97 fps). If you capture at half frame (320x240), your capture card already de-interlaced the fields of the video, and the Intelecine feature will not work. If you capture at less than 29.97 fps, Intelecine does not have all the needed frames and does not work. Note: Intelecine is not required when encoding for PAL video because transfers between film and PAL video do not add pulldown frames. Instead, film-to-PAL video transfers speed up the 24 fps source by 4%, which makes the final encoded PAL video 25 fps progressive. Adaptive Analyzes the video and selectively de-interlaces only the parts of the image that are moving while leaving static portions unaltered. This eliminates the interlacing effect while preserving greater detail in still areas, resulting in a higher-quality image. Click the check box to activate the Adaptive Deinterlace option whenever your output resolution is 320x240 or greater or if your source has a lot of noise. The Adaptive Deinterlace option offers higher resolution that helps average out some source noise. The main reason not to use Adaptive Deinterlace is that it is significantly slower than other options. The motion of the video appears smoother at a frame rate that is an even multiple/divisor of the original frame rate. Film source encoded at 24 fps (its original frame rate) seem smoother than when encoded at 30 fps.

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Chapter 6: Pre-processing
66
Using Intelecine
To use the Intelecine process with material that was originally shot on film and then transferred to NTSC
video:
1.
From the Settings window > Image tab menu, choose Intelecine.
2.
In the Encode tab, select the desired frame rate. For the smoothest playback, specify the
original 24 fps.
If you are producing lower frame rate movies from film source, use 12 fps, which is every other
frame of your source. Using frame rates that divide evenly into your original frame rate with
no remainder generally produces the smoothest motion in the final movie. Using odd rates,
such as 15 fps from 24 fps source, causes uneven motion. See “Frame Rate” on page 181 for
more details.
To use Intelecine, you must start with interlaced, full frame rate source. Because of this, you
should capture the source at full frame size (640x480 or 720x486) and full frame rate (29.97 fps).
If you capture at half frame (320x240), your capture card already de-interlaced the fields of the
video, and the Intelecine feature will not work. If you capture at less than 29.97 fps, Intelecine
does not have all the needed frames and does not work.
Note:
Intelecine is not required when encoding for PAL video because transfers between film
and PAL video do not add pulldown frames. Instead, film-to-PAL video transfers speed up the
24 fps source by 4%, which makes the final encoded PAL video 25 fps progressive.
Adaptive
Analyzes the video and selectively de-interlaces only the parts of the image that are moving
while leaving static portions unaltered. This eliminates the interlacing effect while preserving
greater detail in still areas, resulting in a higher-quality image. Click the check box to activate
the Adaptive Deinterlace option whenever your output resolution is 320x240 or greater or if
your source has a lot of noise. The Adaptive Deinterlace option offers higher resolution that
helps average out some source noise.
The main reason not to use Adaptive Deinterlace is that it is significantly slower than other
options.
The motion of the video appears smoother at a frame rate that is an even multiple/divisor of
the original frame rate. Film source encoded at 24 fps (its original frame rate) seem smoother
than when encoded at 30 fps.