AddBorders
From Avisynth wiki
(Difference between revisions)
Raffriff42 (Talk | contribs) m (one more touch-up) |
Raffriff42 (Talk | contribs) m (one more touch-up) |
||
| Line 1: | Line 1: | ||
| − | Add black or colored borders, increasing frame size. | + | Add black or colored borders, increasing frame size. This has several common uses: |
| + | * Adjust the [[Aspect_ratios|aspect ratio]] (make a 4:3 clip into 16:9 without stretching) | ||
| + | * [[Splice]] a smaller resolution clip to a larger one without resizing | ||
| + | * Together with [[Crop]], shift a clip horizontally or vertically – see below. | ||
| + | |||
== Syntax and Parameters == | == Syntax and Parameters == | ||
Revision as of 17:11, 30 January 2016
Add black or colored borders, increasing frame size. This has several common uses:
- Adjust the aspect ratio (make a 4:3 clip into 16:9 without stretching)
- Splice a smaller resolution clip to a larger one without resizing
- Together with Crop, shift a clip horizontally or vertically – see below.
Syntax and Parameters
AddBorders( clip clip, int left, int top, int right, int bottom [, int color ] )
- int left, top, right, bottom = (required)
- int color = (black)
- Border color; specified as an RGB value. See this page for more information on specifying colors.
- For YUV clips, colors are converted from full-range (0–255) to tv-range (16–235).
- Border color; specified as an RGB value. See this page for more information on specifying colors.
Examples and Notes
- Add letterbox (top and bottom) borders:
## add dark blue borders, using hex color notation AddBorders(0, 86, 0, 86, $00008B) ## same as above, using named preset color AddBorders(0, 86, 0, 86, color_darkblue)
- Be aware that many older lossy compression algorithms don't deal well with solid-color borders, unless the border happens to fall on a macroblock boundary (16 pixels for MPEG).
- Use AddBorders in combination with Crop to shift an image without changing the frame size:
# Shift an image 2 pixels to the right Crop(0, 0, Width-2, Height) AddBorders(2, 0, 0, 0)
- Note, shifting this way must be done in 1- or 2-pixel increments, depending on color format.
- You can shift in sub-pixel increments with Resize.
