Squared artefacts on image when converting to AVIF

[vatsaljrathod]

Getting square artefacts at the right edge of the image while converting jpg to avif using av1 compression. Adding some example it might be useful.

Already checked with libheif, as per them bug should be in encoding application. One observation is, if we scale down speed setting then we are not getting these artefacts.

squared_artefacts_samples.zip

[adityapatadia]

I should mention that this issue only comes with version 0.4.0. Everything works fine with 0.3.4.

[lu-zero]

Could you please provide more information on how you produced the file?

[adityapatadia]

It was produces using https://github.com/strukturag/libheif library. That library was in turn used inside https://github.com/lovell/sharp to generate image.

When we downgraded Rav1e, the issue went away hence reported here.

[lu-zero]

If you can provide the settings in use and, even better a command line, it would be great.

[vatsaljrathod]

Apologies for the delayed response.

Here is the setting I have used. Here speed >5 is causing the issue.
sharp: 0.27.0
libvips: 8.10.5
libheif: 1.10.0

let image = await sharp(inputImage)

  let resizeOptions = {
    kernel: 'lanczos3',
    fastShrinkOnLoad: true,
    width: 388,
    height: null,
    withoutEnlargement: true,
    fit: 'inside'
  };

  let heifOptions = {
    quality: 60,
    compression: 'av1',
    lossless: false,
    speed: 8
  }

  let imageBuffer = await image
    .rotate()
    .resize(resizeOptions)
    .sharpen()
    .heif(heifOptions)
    .toBuffer({resolveWithObject: true});