White artifacts around the image when rotating an ImageClip with a mask or just a png with transparency in angles that are not 0, 90, 180, 270 ( Added Examples to reproduce it )

[hgonzalezsgn]

Hi Zulko,

I just download the master and I have white artifacts around the image when rotating an ImageClip with a mask in angles that are not 0, 90, 180, 270 for example I used 60 and have the issue

The following is the code:

from moviepy.editor import *
mask = ImageClip("mask.png", ismask=True)
image = ImageClip("imageToTest.png", False)
imageWithRotation = image.set_mask(mask)
imageWithRotationAndMask = imageWithRotation.rotate(60)
imageWithRotationAndMask.save_frame("result.png")

This are the images used in the script and the result:

Thanks!
Hernan

[latexers]

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[hgonzalezsgn]

Another important comment is that the issue happens also if instead of a mask I use a png with transparency( edited in photoshop )

from moviepy.editor import *
image = ImageClip("imageWithTransparency.png")
imageWithRotation = imageWithRotation.rotate(60)
imageWithRotation.save_frame("result.png")

[hgonzalezsgn]

Guys I figured it out! This issue can be closed

It is not a bug just a parameter that need to be change.

You need to change the resample param which defaults to "bicubic" to "nearest" or "bilinear"
rotate(clip, angle, unit='deg', resample="bicubic", expand=True)

For example
imageWithRotation = image.rotate(60 , "deg", "nearest")

Attached the result:

[ayoosh007]

Guys I figured it out! This issue can be closed

It is not a bug just a parameter that need to be change.

You need to change the resample param which defaults to "bicubic" to "nearest" or "bilinear" rotate(clip, angle, unit='deg', resample="bicubic", expand=True)

For example imageWithRotation = image.rotate(60 , "deg", "nearest")

Attached the result:

You are a lifesaver.Thank you so much.