AutoResize v.1.7 (ideal for use with ffdshow) [Last Updated: 2/4/2011]

[dansrfe]

This function will resize to any aspect ratio (AR), and add black borders, if needed, to reach any destination resolution, primarily for full-screening video to maximum screen resolution. This function was initially designed to make possible high-quality subtitle rendering at maximum possible resolution with optimal placement area, to be used with ffdshow video decoder. AutoResize can be used with any renderer to deliver automated high-quality spline36 resizing on-the-fly.

Features:

- Compatible with any version of AviSynth 2.5.8+
- Borders appended in a mod2 fashion with right-hand justification for boxed clips (+ 1 pixel) and top justification for letterbox clips with (+ 1 pixel).
- High quality Spline36Resize function used for any resizing
- If necessary, colorimetery conversions are taken care of automatically when changing from SD -> HD or any other upscale/downscale situation.
- OSD displays Resolution changes, Borders information, AR changes, and FPS information in upper left corner.

Prerequisites:

AviSynth 2.5.8+ (Preferably MT version) http://www.mediafire.com/file/kjdzqy...ynthMT_258.exe
ColorMatrix (For SD->HD conversions) http://avisynth.org/warpenterprises/...x_20070828.zip

Syntax:

AutoResize(clip, bool "Info", bool "Borders", float "AR", string "DAR", int "SW", int "SH")

Info: Enables/disables OSD. (default: "false")

Borders: Allows you to resize with or without borders. (default: "true")

AR: Changes AR with respect to "screen" variable values. (default: input AR)

DAR: Sets display aspect ratio of input. Options: PAL/NTSC DVD Only: ["letterbox" for 16/9 (1.777) ,"box" for 4/3 (1.333)]. (default: null)

SW: Screen width in pixels. (default: 1920)

SH: Screen height in pixels. (default: 1080)

Some Important Notes:

AutoResize is meant to be run at all times. It is designed to use it's logic in every possible resizing situation for the best output. AutoResize will not resize unless it is absolutely needed; the same goes for appending black borders. If you pass a video through AutoResize that matches the sw and sh variables or default conditions then it will pass the video through untouched and simply be equivalent to "last" in AviSynth notation. Resizing takes place if needed (see below) then black borders are appended if needed (see below). AR changes are shown in the OSD denoted by "Input AR -> Output AR".

How to know if resizing is taking place:

In order to absolutely know that the input is or is not being passed through the resizer you should check the OSD. If you see "Resolution: Input x Resolution -> Output x Resolution" the input is being passed to the resizer. If you just see "Resolution: "Input x Resolution" then the input is not being passed through a resizer whatsoever.

How to know if borders are being added:

In order to absolutely know that black borders are or are not being appended is by checking the OSD. If you see "Borders: off" then there are no black borders being appended to the output. If you just see "Borders: on, (x,x,x,x)" then black borders are being appended to the output.

Here are some examples:

SW = 1920, SH = 1080; Input = 1280 x 720 [OSD: Resolution: 1280 x 720 -> 1920 x 1080 ; Borders: off]
SW = 1280, SH = 720; Input = 1280 x 720 [OSD: Resolution: 1280 x 720 ; Borders: off]

What works best for me performance wise in using this function and other functions in AviSynth on-the-fly:

This is my script that I have in ffdshow (hats off to Didée for finding the magic performance juice ):

setmtmode(5)
ffdshow_source()
changefps(last,last,true)
setmtmode(2)
[...other functions if needed...]
AutoResize()

I have 3:2 Pulldown set to "Apply Pulldown" and have unchecked the "Buffer back/ahead:" along with "Add ffdshow video source". The changefps does nothing but cache a few frames but it has a drastic performance boost in the overall script.

Download: AutoResize v1.7.avsi

Changelog:

2/4/11 - Major code rewrites. PAR changed to DAR (only "letterbox" and "box" modes exist now). Added "Borders" variable. OSD massively improved and cleaned up. Variable names shortened to abbreviations. Housekeeping and labeling of different parts of code.
1/2/11 - Added new PAR parameters and error message on invalid par parameter input or when par is fed a non-square pixel NTSC or PAL source.
12/21/10 - Fixed some bugs. Could result in faster speeds for some.
11/25/10 - Removed ThreadRequest.
11/16/10 - Removed mode setting & changed function name to "AutoResize".
11/16/10 - Major changes. Added input PAR setting for flagged content. Optimized code.
11/15/10 - Minor bugfixes, one variable input changed and added documentation in script.
11/12/10 - Code updated from creaothceann's adjustments. Thanks!

[creaothceann]

DVDs can also have a width of 704.

function Resize(clip c, int "Mode", bool "Info", float "AR", int "ScreenWidth", int "ScreenHeight")  {
        Info         = Default(Info        , False)
        Mode         = Default(Mode        ,     0)
        ScreenWidth  = Default(ScreenWidth ,  1920)
        ScreenHeight = Default(ScreenHeight,  1080)

        SetMTMode(2)
        last = c

        AR_Screen = Float  (ScreenWidth) / ScreenHeight
        AR_norm   = Float  (      Width) /       Height
        AR        = Default(AR, AR_norm)

        Resize_BoxWidth        = Round(Float(ScreenHeight) * AR)
        Resize_LetterboxHeight = Round(Float(ScreenWidth ) / AR)

        Mod2Box       = Resize_BoxWidth        + (Resize_BoxWidth        % 2)
        Mod2Letterbox = Resize_LetterboxHeight - (Resize_LetterboxHeight % 2)

        Border_Letterbox = (ScreenHeight - Mod2Letterbox) / 2
        Border_Box       = (ScreenWidth  - Mod2Box      ) / 2

        Resize_Letter = Spline64Resize(ScreenWidth, Mod2Letterbox).ThreadRequest
        Resize_Box    = Spline64Resize(Mod2Box    , ScreenHeight ).ThreadRequest

        Upscale_Letterbox = (Border_Letterbox == 0)  ?  Resize_Letter.ThreadRequest  :  Resize_Letter.ThreadRequest.AddBorders(         0, Border_Letterbox,          0, Border_Letterbox).ThreadRequest 
              Upscale_Box = (Border_Box       == 0)  ?  Resize_Box                   :  Resize_Box   .ThreadRequest.AddBorders(Border_Box,                0, Border_Box,                0).ThreadRequest

        Letterbox_or_Box = (AR >= AR_Screen)  ?  Upscale_Letterbox  :  Upscale_Box
        DVD_or_SD        = ((Width == 720 || Width == 704) && (Height == 480 || Height == 576))  ?  Spline64Resize(1920, 1080).ThreadRequest  :  (Width > 1280)  ?  Letterbox_or_Box  :  Letterbox_or_Box.ColorMatrix("Rec.601->Rec.709").ThreadRequest

        HD_BorderWidth  = (ScreenWidth  - Width ) / 2
        HD_BorderHeight = (ScreenHeight - Height) / 2

        ResizeHeight = (Height == ScreenHeight) && (AR_norm == AR)  ?  AddBorders(0, HD_BorderWidth , 0, HD_BorderWidth ).ThreadRequest  :  DVD_or_SD
        ResizeWidth  = (Width  == ScreenWidth ) && (AR_norm == AR)  ?  AddBorders(0, HD_BorderHeight, 0, HD_BorderHeight).ThreadRequest  :  ResizeHeight

        HD        = ((Width == ScreenWidth) && (Height == ScreenHeight)) && (AR_norm == AR)  ?  last  :  ResizeWidth
        SelectRes = (AR >= AR_Screen)  ?  Resize_Letter  :  ((Width == 720 && (Height == 480 || Height == 576))  ?  Spline64Resize(1920, 1080)  :  Resize_Box)
        ChangeAR  = (AR_norm == AR)  ?  String(AR_norm)  :  (String(AR_norm) + " -> " + String(AR))
        ChangeRes = (SelectRes.Width != Width) || (SelectRes.Height != Height)  ?  String(Width) + " x " + String(Height) + " -> " + String(SelectRes.Width) + " x " + String(SelectRes.Height)  :  String(Width) + " x " + String(Height)

        SourceInfo = HD.Subtitle("Source res: "      , x= 19, y=25, Size=22, Font="Arial", Text_Color=$DC143C)
        \.              Subtitle(String(ChangeRes)   , x=140, y=25, Size=22, Font="Arial"                    )
        \.              Subtitle("A/R: "             , x= 92, y=49, Size=22, Font="Arial", Text_Color=$DC143C)
        \.              Subtitle(String(ChangeAR)    , x=141, y=49, Size=22, Font="Arial"                    )
        \.              Subtitle("FPS: "             , x= 88, y=72, Size=22, Font="Arial", Text_Color=$DC143C)
        \.              Subtitle(String(framerate(c)), x=141, y=72, Size=22, Font="Arial"                    )

        (Mode == 1)  ?  (Info  ?  SourceInfo.ThreadRequest  :  HD)  :  last
}

PS: You shouldn't assign anything to "last", it's a predefined variable that contains the result of the last operation that wasn't assigned to another variable:

AVISource(...)
AudioDub(last, WAVSource(...))
tmp = AddBorders(1, 0, 1, 0, $123456)
StackHorizontal(last, tmp)

[Gavino]

Originally Posted by creaothceann

PS: You shouldn't assign anything to "last", it's a predefined variable that contains the result of the last operation that wasn't assigned to another variable

Agreed that you shouldn't use a variable called 'last' for some unrelated purpose, but I don't see anything wrong with writing
last = c
where the purpose is to set the 'real' last, needed in the later use of 'width' (ie last.width()) and 'height'.
You could just write
c
on its own to get the same result, but that looks a bit odd.

[creaothceann]

Originally Posted by Gavino

You could just write
c
on its own to get the same result

Yeah, I do that in my functions.

[Gavino]

It's debatable which is 'better', 'c' on its own or 'last=c' - I do it either way, more or less at random.

Another possibility is
/* last = */ c
which shows the intent without explicitly assigning to 'last'.
It's really a matter of taste, and I wouldn't lose sleep over the issue.

[noee]

What benefit to pic quality does madVR bring to the table in this case (besides 3DLut)? Why not use EVR or EVR-CP as the renderer and output RGB from ffdShow (and use it's HQRGB and dithering)?

[dansrfe]

madVR is basically the smoothest renderer for me and *does* actually look better in terms of gradient reproduction and minimal banding. But you can do that with gradfun in ffdshow as well. It boils down to personal preference I guess if you don't use the 3DLUT.

Also, any other changes I could make to it? I wish there was some way I could combine some if statements to get it to run a bit faster and just want to point out that this script will not work with AviSynth unless the AddBordersMod function is applied to is from the Development section. I don't use 2.6 at this time therefore I didn't use AddBodersMod.

[henryho_hk]

I have written a similar function and it accepts both source and destination pixel aspect ratio:

function parresize(clip c, int dst_w, int dst_h, string "dst_par", string "src_par", bool "ss")
{
    unit_w  = c.isRGB() ? 1 : 2
    unit_h  = c.isRGB() || c.isYUY2() ? 1 : 2

    assert(dst_w % unit_w == 0, "Destination width must be divisible by "  + string(unit_w))
    assert(dst_h % unit_h == 0, "Destination height must be divisible by " + string(unit_h))

    ss = default(ss, false)

    src_par = default(src_par, "vga11")
    dst_par = default(dst_par, "vga11")
    cvt_par = \
        ( \
        dst_par == "pal43"    ? 12.0/11.0 : \
        dst_par == "ntsc43"   ? 10.0/11.0 : \
        dst_par == "pal169"   ? 16.0/11.0 : \
        dst_par == "ntsc169"  ? 40.0/33.0 : \
                                1.0 \
        ) / \
        ( \
        src_par == "pal43"    ? 12.0/11.0 : \
        src_par == "ntsc43"   ? 10.0/11.0 : \
        src_par == "pal169"   ? 16.0/11.0 : \
        src_par == "ntsc169"  ? 40.0/33.0 : \
                                1.0 \
        )

    src_dar = float(c.width) / cvt_par / c.height
    dst_dar = float(dst_w) / dst_h

    temp_w = floor((src_dar >= dst_dar ? dst_w : round(1.0 * dst_h * src_dar))/unit_w)*unit_w
    temp_h = floor((src_dar >= dst_dar ? round(1.0 * dst_w / src_dar) : dst_h)/unit_h)*unit_h

    r_factor = ss ? int(pow(2,ceil(log(max(float(temp_w)/c.width,float(temp_h)/c.height))/log(2.0)))) : 1

    s1 = r_factor == 1 \
         ? c.blackmanresize(temp_w,temp_h) \
         : c.nnedi3_rpow2(rfactor=r_factor,cshift="spline64resize",fwidth=temp_w,fheight=temp_h)

    pad_l = floor(0.5*(dst_w-temp_w)/unit_w)*unit_w
    pad_r = dst_w - pad_l - temp_w
    pad_t = floor(0.5*(dst_h-temp_h)/unit_h)*unit_h
    pad_b = dst_h - pad_t - temp_h

    return s1.addborders(pad_l, pad_t, pad_r, pad_b)
}

Thanks Gavino for the suggestion.

[Gavino]

Originally Posted by henryho_hk

    assert(dst_w == floor(dst_w/unit_w)*unit_w, ...)
    assert(dst_h == floor(dst_h/unit_h)*unit_h, ...)

'floor' is redundant here - since dst_w and unit_w are both integers, so is dst_w/unit_w.

So you could simplify it to

    assert(dst_w == (dst_w/unit_w)*unit_w, ...)

or even more simply

    assert(dst_w % unit_w == 0, ...)

[BatKnight]

Can you explain me how to use this script in ffdshow? Because I've loaded the script to ffdshow, in the Avisynth window, enabled it, but it' doesn't resize the video.

Bat

[dansrfe]

load the script in ffdshow, write "AutoResize()" without quotes and you're good to go. if you are trying to play a 16:9 dvd then just enter par="wide" or if you're trying to view a 4:3 dvd then add par="[any string]" where basically you can add any string to signal 4:3 flagged content. If par is left blank then it won't override the AR setting. Also read the what the parameters mean inside of the script.

Note: If you're resolution is NOT 1920 x 1080 then you will need to specify the ScreenWidth & ScreenHeight parameters.

[dansrfe]

If someone could download and optimize the script via changing calling methods or whatever you feel will have it running as fast as possible then please do so. Unfortunately, I'm inexperienced in the optimization area and still learning different techniques.

[gnol009]

This is my scrip error. how can i fix it?

[dansrfe]

^ install this: http://www.mediafire.com/file/kjdzqy...ynthMT_258.exe. You must have an MT version of AviSynth 2.5.8 or higher in order for this to work

[Frank K Abbott]

This functions works well for me thanks!

[Mark Regalo]

THis is a good function. I use with madvr. Will there be any more features coming out??

[dansrfe]

For right now I'm fairly sure I have perfected the functions that currently exist. As for more functions, I'll add them if it is something that would help others as well. Suggestions are welcome. Please test it and see if it works for you.

PS: All colorimetery conversions etc. are ALL taken care of internally in the script. You will always get the right output from madVR with respect to what is coming out of the function.

[Usedocne]

Nice function dansrfe, thanks for sharing it.

[Sharc]

Nice function, dansfre. Thanks for sharing it.

I assume the script does not automatically de-interlace interlaced video before resizing. Means interlaced video should be de-interlaced before applying this script, correct?

[THX-UltraII]

I think I m missing (because my English is not good) but what is the exact pupose of this tool? Why would someone want to change the aspect ration of a movie if you get a incorrect result ('long heads') of the picture?