[#30666] - [4.0] com_media not possible to upload an avif image
Steps to reproduce the issue
Go to the blog AVIF has landed by Jake Archibald and download an AVIF image.
AVIF is a new image format derived from the keyframes of AV1 video. It's a royalty-free format, and it's already supported in Chrome 85 on desktop. Android support will be added soon, Firefox is working on an implementation, and although it took Safari 10 years to add WebP support, I don't think we'll see the same delay here, as Apple are a member of the group that created AV1.
- Login Joomla 4.0 Administrator > Content > Media
- Try to upload the AVIF image
Expected result
The file should be uploaded
Actual result
Requested change
The media manager should be adjusted to allow uploading AVIF images.
Votes
joomla-cms-bot
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Joomla Administrator > Content > Media > Options
- Legal Extensions (File Types) => added
,avif,AVIF - Check MIME Types = YES (by default)
- Legal Image Extensions (File Types) => added
avif - Legal MIME Types => added 'image/avif`
Tried to upload an AVIF image.
The result:
Concluding two things:
- there is no English translation for this text variable
- it is not possible to upload an avif image
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The MIME type is image/heif.
Added MIME type image/heif. Uploading an AVIF image is not possible with the same error message as mentioned earlier
Can you post a link to the image for testing?
I've been using one of the avif images downloaded from the article mentioned in the description of this issue
- article => https://jakearchibald.com/2020/avif-has-landed/
- used image => https://jakearchibald.com/c/f1-good-a14c8cc5.avif
What happens if you switch off "Check MIME Types" in media manager options?
Yes, but I wanted to know what happens when the MIME type check is switched off.
It works without MIME check.
So the MIME check is the broken thing? Maybe it just can't handle that new format yet? Maybe our dependency needs an update for that?
The MIME type is determined in the MediaHelper class here:
https://github.com/joomla/joomla-cms/blob/4.0-dev/libraries/src/Helper/MediaHelper.php#L65
For images, following functions are used if available, one after the other:
- exif_imagetype
- getimagesize
- mime_content_type
- finfo_open
The availability of these functions depends on PHP version and available PHP extensions, and if avif images are included in the corresponding extensions or in case of mime_content_type in the magic file may depend on the particular PHP extension's version.
I am not at a computer to double check. Add avif to filetype and image extension settings. For the mime type please add the avif file manually to the images folder and click the info icon to see its mime type value to use for the mime type setting.
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Using application/octet-stream works for me.
Thanks, @brianteeman , for letting me know about this.
I imagine the problem is that Joomla doesn't support AVIF, because PHP-GD doesn't support AVIF - which is because libgd doesn't include AVIF support?
If so, I'm working on that right now. You can follow my progress (and I very much hope there will be good news soon) at libgd/libgd#557 .
@hans2103 Have you added ".avif" to both the list of allowed file types "Legal Extensions (File Types)" and the list of allowed images "Legal Image Extensions (File Types)" in the media manager's options? And if "Check MIME Types" is switched on in the options, which is the default, have you also added "image/avif" to the list of allowed MIME types "Legal MIME Types"?