[Home]Video Resizing

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Introduction

As with many things with transcode, resizing of the video can be done in different ways, at different times. This is the fixed processing order (resizing options are highlighted):
 -j -I -X -B -Z -Y -r -z -l -k -K -G -C

The -r n[,m] option reduces the height/width by factor n[,m]. Other, more flexible ways for resizing the video are

Examples

All the following examples use the same input data:

16:9 widescreen DVD data, output data should have 4:3 aspect ratio without black border. Analyze the input data, we assume a black border at the top and bottom of 66 pixel in a 720x576 pixel frame.


Using the fast resizing option -B, shrinking the height to reach a correct aspect ratio.
 -j 32,0 -B 4,0 -Y 24,0
Final image size: 720x336 pixel.


Using the fast resizing options -X and -B, removing 1% at the left&right border, expanding the image width to PAL resolution, and shrinking the height to reach a correct aspect ratio.
 -j 32,8 -X 0,2 -B 3,0 -Y 24,0
Final image size: 768x368 pixel.


Using the fast -X resizing, expanding the image width, but removing 3% of the image at the left and the right border.
 -j 64,24 -X 0,7
Final image size: 896x448 pixel.


Using the slower -Z resizing, expanding the image width to PAL resolution.
 -j 68,0 -Z 768x360
Final image size: 768x360 pixel.


Using the slower -Z resizing, 800 Pixel image width.
 -j 66,0 -Z 800x368
Final image size: 800x368 pixel.


Using the slower -Z resizing, expanding the image width.
 -j 64,0 -Z 960x448
Final image size: 960x448 pixel.

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Edited June 25, 2005 12:48 pm by Monroe (diff)
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