[BUG] HEIF image previews broken

[fskaeh]

Is there an existing issue for this?

• I have searched the existing issues

Current Behavior

Pictures taken from iOS devices running iOS >=18 fail to have a thumbnail generated in Nextcloud.
This is due to an issue in ImageMagick (specifically libheif). Apparently, Nextcloud fixed this in their official Docker image, but the issue persists in the LinuxServer image, I assume because the ImageMagick version wasn’t bumped recently.
Would it be possible to fix this on your end please?

For reference, the issue was discussed there: nextcloud/server#47289

Expected Behavior

All images should get previews, including HEIF.

Steps To Reproduce

1. Take picture with iOS 18 device with “Most Compatible” image format turned off.
2. Upload the picture to your LinuxServer Nextcloud instance.
3. The preview doesn’t get generated for that image.

Environment

Orbstack on MacOS.

CPU architecture

arm64

Docker creation

Any Docker setup that uses the LinuxServer Nextcloud image.

Container logs

No log.

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[aptalca]

Did you follow this?
https://github.com/linuxserver/docker-nextcloud?tab=readme-ov-file#heic-image-previews

[fskaeh]

Did you follow this? https://github.com/linuxserver/docker-nextcloud?tab=readme-ov-file#heic-image-previews

Yes, I have HEIC previews enabled. As mentioned in the description of this issue, only HEIF images produced in iOS 18 are impacted (due to Apple changing something in the format of the images). HEIF images taken from my phone’s camera BEFORE the iOS 18 upgrade are not impacted by this issue and are getting their preview generated as expected.

[fskaeh]

Oh hey, looks like I came in just a bit too late. It seems to have been fixed. According to this comment (nextcloud/docker#2332 (comment)), bumping Alpine to 3.21 did the trick, which I see the LinuxServer image has done as well (not sure when).