Package: imagemagick
Version: 8:6.9.11.60+dfsg-1.3+deb11u1
Severity: normal
X-Debbugs-Cc: prudl...@insite.coop
Dear Maintainer,
When converting a PNG image to AVIF, transparent pixels are replaced with black
pixels.
It can be reproduced with this image:
https://upload.wikimedia.org/wikipedia/commons/9/9d/Alpha_transparency_image.png
With this command:
convert Alpha_transparency_image.png Alpha_transparency_image.avif
It seems to be a known issue fixed in ImageMagick 7:
https://alexwlchan.net/2023/check-for-transparency/
-- Package-specific info:
ImageMagick program version
---
animate: ImageMagick 6.9.11-60 Q16 x86_64 2021-01-25 https://imagemagick.org
compare: ImageMagick 6.9.11-60 Q16 x86_64 2021-01-25 https://imagemagick.org
convert: ImageMagick 6.9.11-60 Q16 x86_64 2021-01-25 https://imagemagick.org
composite: ImageMagick 6.9.11-60 Q16 x86_64 2021-01-25 https://imagemagick.org
conjure: ImageMagick 6.9.11-60 Q16 x86_64 2021-01-25 https://imagemagick.org
display: ImageMagick 6.9.11-60 Q16 x86_64 2021-01-25 https://imagemagick.org
identify: ImageMagick 6.9.11-60 Q16 x86_64 2021-01-25 https://imagemagick.org
import: ImageMagick 6.9.11-60 Q16 x86_64 2021-01-25 https://imagemagick.org
mogrify: ImageMagick 6.9.11-60 Q16 x86_64 2021-01-25 https://imagemagick.org
montage: ImageMagick 6.9.11-60 Q16 x86_64 2021-01-25 https://imagemagick.org
stream: ImageMagick 6.9.11-60 Q16 x86_64 2021-01-25 https://imagemagick.org
-- System Information:
Debian Release: 11.6
APT prefers oldstable-updates
APT policy: (500, 'oldstable-updates'), (500, 'oldstable-security'), (500,
'oldstable')
Architecture: amd64 (x86_64)
Kernel: Linux 5.15.0-76-generic (SMP w/8 CPU threads)
Locale: LANG=C, LC_CTYPE=C (charmap=UTF-8) (ignored: LC_ALL set to en_US.utf8),
LANGUAGE not set
Shell: /bin/sh linked to /bin/dash
Init: unable to detect
Versions of packages imagemagick depends on:
ii imagemagick-6.q16 8:6.9.11.60+dfsg-1.3+deb11u1
imagemagick recommends no packages.
imagemagick suggests no packages.
-- no debconf information
