#Avisynth imagesource update
* Partial 2.6 update of Avisynth_C interface. * Add IScriptEnvironment::GetVarDef() nothrow version of GetVar().
* AviSource: added multiple video and audio track support. * TCPDeliver, 2.6 plugin, support all pixel types. Write the script (we'll call it test.Identical to AviSynth_150419.exe release candidate 3.
Write the script (we'll call it test.avs, write it in Notepad and save it): Now, crop the width 560 pixels, which may not be even on both sides - it could be 300 on one side and 260 on the other, or 90 on one side and 470 on the other.įor the purpose of demonstration, though, I'm going to use an even split of 280 on each side. So let's assume that the original image is 2560x1600, as you might get from a camera.Ģ560 / 1.25 = 2048, that won't work because the vertical resolution is already smaller than thatġ600 x 1.25 = 2000, which will work since the horizontal resolution is larger than 2000 pixelsĢ560 - 2000 = 560, so 560 is the total amount to crop out Lanczos4 is only one of many resizers AviSynth can use - there's also Bilinear, Bicubic, Lanczos (which is Lanczos3 by default, but can also use an arbitrary number of taps), Spline16, Spline36, Spline64, etc. If you don't want to crop a side, just use 0 (0 is the only exception to the negative rule). Lanczos4Resize(x,y)With the Crop filter, the Left and Top cropping is positive, and the Right and Bottom cropping is negative. It's also possible to do it with AviSynth, but you'd still need to do the math I described above and determine the amount of pixels to crop on each side. It can load images and export images, so it doesn't have to be video. You can also resize first and then crop as described by the post above mine, but the # of pixels to crop will be different.Īnd I just prefer doing the cropping first.Īs strange as this might sound, I'd be more inclined to do this in VirtualDub - despite it being a video pre/post-processor - if you need a visual editor.Ī combination of the Null Transform filter (which does nothing on its own, but allows the user to crop) and Resizer (which can do proportional resizing) is what you need. The methodology is exactly the same as above, just swap '1.5' into the calculations.īasically, crop first so the ratio matches, and then resize down. Since it now matches the aspect ratio desired, you can resize down without problems.ġ50x100 has a ratio of 1.5 (150 / 100 = 1.5). The axis you used for the math will stay the same, just crop the other axis to the size you calculated. Two different images, each with a different ratio?Ģ50x200 has a ratio of 1.25 (250 / 200 = 1.25), so take either the shorter axis and multiply by 1.25, or take the longer axis and divide by 1.25. The photo needs to be at 250x200 and the signature at 150x100, correct? Though in the title of this thread, you say you want to keep the aspect ratio, it's probably not possible considering what you want to shrink it down to is not of the same ratio, if the image in your signature is anything to go by.įor example, if the image in your signature is cropped to the smaller set of dimensions you stated, it would look like the attachment bellow. It may be easier to adjust the canvas size instead of cropping to 250P width, and then just centre it manually,(You'd still need to work out how many pixels will be coming off the canvas on each side). The Cropping will be the awkward part, as you will need to work out how many excess pixels to drop from each side.
#Avisynth imagesource how to
So i'm not entirely sure how to describe how i'd approach this in text form.Įrr.resize the image so it's vertical axis matches what you need it to be(So resize to 200P) and crop from their to get your Horizontal requirement(250P).
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