Any way auto resize to 1080p while keeping aspect ratio with AVISynth?

[lavans]

I'm trying to figure out a script where AVISynth resizes a video to 1080p and adjusts the width to match the scale while maintaining the aspect ratio. Basic math says that a script like this should work.

spline64resize(last.width/last.height*1080,1080)

For whatever reason, AVISynth isn't calculating the math, and ends up resizing the video to 1080x1080.

Any ideas?

[Guest]

Maybe like this :

spline64resize(Int(Float(last.width)/last.height*1080))

[Groucho2004]

Try this:
x = float(width) / float(height)
spline64resize(round(x * 1080.0),1080)

Some background info here (http://avisynth.org/mediawiki/Internal_functions/Numeric_functions).

[lavans]

Maybe like this :

spline64resize(Int(Float(last.width)/last.height*1080))

Invalid arguments for Spline64Resize :(

Try this:
x = float(width) / float(height)
spline64resize(round(x * 1080.0),1080)

Some background info here (http://avisynth.org/mediawiki/Internal_functions/Numeric_functions).

This worked like a charm. Thanks!

[TheSkiller]

@ lavans
That doesn't work because you don't tell AviSynth to calculate in float (and round the result to an integer in the end).

[Sparktank]

Try this:
x = float(width) / float(height)
spline64resize(round(x * 1080.0),1080)

Some background info here (http://avisynth.org/mediawiki/Internal_functions/Numeric_functions).

Is there any way to get this to round to nearest multiple of 4 for YV12?

[Groucho2004]

Is there any way to get this to round to nearest multiple of 4 for YV12?

x = float(width) / float(height)
spline64resize(round(x * 1080.0 / 4.0) * 4, 1080)

[Sparktank]

Thank you! I had the *4 in the wrong place.
Found an old post using ratio for factor and quite different for script.
I had thought /4.0 and *4 had a role in it.

Much obliged! :)

[lavans]

@ lavans
That doesn't work because you don't tell AviSynth to calculate in float (and round the result to an integer in the end).

I figured something like this was the case. What was throwing me for a loop is that I was getting different widths depending on how I ordered the values on my original code. Good to know that AVISynth requires float calculations.