Resize8
From Avisynth wiki
| Abstract | |
|---|---|
| Author | mawen1250 |
| Version | v1.2 |
| Download | Resize8_v1.2.avsi |
| Category | Resize |
| License | |
| Discussion | NMM-HD [Chinese] |
Contents |
Description
Resize8() works just like AviSynth's internal resizers but with some extra features:
- Chroma placement is correctly handled by it, while AviSynth resizers doesn't.
- Scaling kernel for luma and chroma can be adjusted separately
- Optional adaptive anti-ringing algorithm.
It also includes Resize8_Separate(), this function processes each plane's source position separately, mainly designed for fixing center shift caused by nnedi3, eedi3, eedi2, etc. Note that it doesn't correct chroma placement, so usually the result should be resized back to the original size, such as what many anti aliasing functions do. Adaptive anti-ringing algorithm is supported
Requirements
Required Plugins
Latest version of the following plugins are recommended unless stated otherwise.
Syntax and Parameters
- Resize8 (clip input, int "target_width", int "target_height", float "src_left", float "src_top", float "src_width", float "src_height", string "kernel", string "kernel_c", float "a1", float "a2", float "a1_c", float "a2_c", val "noring", val "noring_c", string "cplace", bool "Y", bool "U", bool "V", bool "Alpha")
- clip =
- Input clip
- clip =
- int target_width = input.Width()
- int target_height = input.Height()
- Target width and height.
- int target_width = input.Width()
- float src_left = 0.0
- float src_top = 0.0
- float src_width = input.Width()
- float src_height = input.Height()
- Optional crop syntax, works the same as AviSynth's internal resizers.
- float src_left = 0.0
- string kernel =
- string kernel_C =
- "kernel" sets resizing kernel for luma, "kernel_c" sets resizing kernel for chroma.
- Supported kernels:
- Bicubic, Catmull-Rom, Hermite, Mitchell-Netravali, Robidoux, SoftCubic, SoftCubicXX (XX represents softness:[50-100])
- Point, Bilinear, Gauss/Gaussian, Sinc
- Blankman, Blankman2, Blankman3, Blankman4
- Lanczos, Lanczos2, Lanczos3, Lanczos4
- Spline16, Spline36, Spline64
- By default, "Lanczos4" is set for luma upscaling, "Lanczos" is set for chroma upscaling, "Spline36" is set for luma/chroma downscaling.
- string kernel =
- float a1 =
- float a2 =
- float a1_c =
- float a2_c =
- float a1 =
"a1", "a2", sets parameters for resizer used in luma "a1_c", "a2_c" sets parameters for resizer used in chroma "a1" represents "b" and "a2" represents "c" for kernel "Bicubic" (default: b = 1/3., c = 1/3.) "a1" represents "taps" and "a2" do nothing for kernel "Blackman" (default: taps=4, 1<=taps<=100) "a1" represents "taps" and "a2" do nothing for kernel "Lanczos" (default: taps=3, 1<=taps<=100) "a1" represents "taps" and "a2" do nothing for kernel "Sinc" (default: taps=4, 1<=taps<= 20) "a1" represents "p" and "a2" do nothing for kernel "Gauss" (default: p=30, 1<= p <=100) "a1" represents "soft" and "a2" do nothing for kernel "SoftCubic" (default: soft=75, 50<=soft<=100) for kernel "SoftCubicXX", "XX" represents "soft" and "a1"/"a2" do nothing "a1" do nothing and "a2" do nothing for the rest kernels supported by Resize8: "Catmull-Rom", "Hermite", "Mitchell-Netravali", "Robidoux", "Bilinear", "Point", "Spline16", "Spline36", "Spline64"
- val noring =
- val noring_c =
- "noring" & "noring_c" can be Bool or Float
- By default, we don't use anti-ringing algorithm for kernels "Point","Bilinear","Gauss"/"Gaussian","Hermite","SoftCubic".
- When "noring" or "noring_c" is True, adaptive anti-ringing is enabled, when no upscaling is applied, anti-ringing is also automatically disabled.
- For the default kernel of upscaling, kernel="Lanczos4"+noring=True is applied for luma, kernel_c="Lanczos"+noring_c=True is applied for chroma.
- For the default kernel of downscaling, kernel="Spline36"+noring=True is applied for luma/chroma, but the adaptive anti-ringing will turn off anti-ringing.
- val noring =
- Use repair to remove ringing introduced from resizer
- noring >= 1 : completely use non-ringing repaired clip
- 0 < noring < 1 : noring is the weight of non-ringing repaired clip for merging with normally upscaled clip
- noring <= 0 or False : do not use non-ringing repaired clip
- noring == True : adapt the weight of non-ringing repaired clip according to input and output resolution
- string cplace = "MPEG2"
- Placement of the chroma subsamples. Can be one of these strings:
- "MPEG1": 4:2:0 subsampling used in MPEG-1. Chroma samples are located on the center of each group of 4 pixels.
- "MPEG2": Subsampling used in MPEG-2 4:2:x. Chroma samples are located on the left pixel column of the group.
- Placement of the chroma subsamples. Can be one of these strings:
- string cplace = "MPEG2"
- bool Y = true
- bool U = true
- bool V = true
- bool Alpha = true
- Control whether to process Y/U/V plane(or R/G/B/A plane for RGB24/RGB32 input).
- bool Y = true
Examples
Correctly scale a YV12 source with MPEG2 chroma placement:
AviSource("Blah.avi") Resize8(target_width=1280, target_height=720, cplace="MPEG2") # Identical to Resize8(1280,720)
Upscale using adaptive anti-ringing:
Resize8(target_width=1280, target_height=720, noring=true)
Changelog
Version Date Changes
v1.2 02/24/2015 - add Resize8_Separate() function v1.1 xx/xx/xxxx - fix RGB24 problem v1.0 11/15/2013 - Initial release
External Links
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