SangNom2

Revision as of 02:04, 25 September 2014

Description

SangNom2 is a reimplementation of MarcFD's old SangNom filter. Originally it's a single field deinterlacer using edge-directed interpolation but nowadays it's mainly used in anti-aliasing scripts. The output is not completely but mostly identical to the original SangNom.

What's Different

• It's open source
• Correct borders processing
• Additional colorspace support
• Multithreading support
• Requires SSE2

• Single threaded performance is mostly identical to the old version despite this plugin using SSE2.

Y8

One of the most important differences is Y8 support in AviSynth 2.6. This enables much faster anti-aliasing (especially when used with FTurn plugin) without any chroma processing. See MAA2 for example.

Requirements

• AviSynth 2.6.0 Alpha5 or later
• x64 version requires AviSynth+ r1576 or later
• Supported color formats: Y8, YV12, YV16, YV24, YV411

• SSE2 capable CPU
• Microsoft Visual C++ 2012 Redistributable Package (x86 / x64)

*** vcredist_x86.exe required for SangNom2-x86

*** vcredist_x64.exe required for SangNom2-x64

Syntax and Parameters

SangNom2 (clip, int "order", int "aa", int "aac", int "threads")

int  order = 1

Input clip must be planar.

int  order = 1

Order of deinterlacing:

• 0 : Double frame rate, top and bottom fields are kept but DoubleWeave must be called before SangNom2.
• 1 : Single frame rate, keep top field.
• 2 : Single frame rate, Keep bottom field.

int  aa = 48

Strength of luma anti-aliasing.

int  aac = 0

Strength of chroma anti-aliasing. The original SangNom always assumes aa=0 for chroma processing.

This makes some use cases harder to implement, so additional parameter aac was introduced. Default value is 0 to maintain backward compatibility.

int  threads =

Control how many threads SangNom2 uses. This plugin uses min(number of logical processors, 4) threads to do its job.

In my tests performance doesn't get any better when using more than 4 threads. Internally it uses a simple thread pool.

Examples

SangNom with default settings:

AviSource("blah.avi")
SangNom2(order=1, aa=48, aac=0)

SangNom with double frame rate output:

AviSource("blah.avi")
DoubleWeave()
SangNom2(order=0, aa=48, aac=0)

Changelog

Version      Date            Changes

v0.35        11/26/2013      - x64 build added. 
                               Confirmed to be a little slower than x86 on some resolutions with 4 threads and faster in other cases.

v0.3         07/26/2013      - This plugin now works only with AviSynth 2.6 Alpha4 or later. All previous versions are not supported. 
                               Download previous release if you need that.
                             - This version adds aac parameter, which allows to configure chroma aa strength.
                             - It now also works on YV24 correctly, instead of processing only half chroma resolution.

v0.2         07/14/2013      - Second release, containing some significant performance improvements.
                             - This plugin is now threaded with min(number of logical processors, 4) threads used by default.
                               To change number of threads, just use threads parameter.

v0.1         07/13/2013      - First public release. 
                               Should be more or less stable but doesn't include many improvements.

Archived Downloads

External Links

• Doom9 Forum - SangNom2 discussion.
• GitHub - Source code repository.

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