ImageMagick can't process certain GIF images

[mkerala]

One of my users reported that he is unable to upload a GIF he created. He was able to upload the same image on a older Chevereto install which was not updated to use
ImageMagick.

Tested on demo and confirmed bug.

▶ Reproduction steps

1. Download image from https://gifyu.com/image/rSVH
2. Try uploading it to any new Chevereto install with ImageMagick.

😢 Unexpected result

Upload fails after 100%.

📃 Error log message

No image have been uploaded
Some errors have occurred and the system couldn't process your request.

• Uwe_Comic1.gif - Server error (Internal server error)

Can't attach original image here as it is 12MB. Can be downloaded from https://gifyu.com/image/rSVH

 

[Rodolfo]

You need to actually tweak ImageMagick to work for your needs. Is not that the defaults will be fine for all use cases, they have policy files for limitations.

My dev version narrowed to this right away:

>> Intervention\Image\Exception\NotReadableException [400]: memory allocation failed `/var/www/html/images/2021/04/10/Uwe_Comic1.gif' @ error/gif.c/ReadGIFImage/1303
At /app/vendor/intervention/image/src/Intervention/Image/Imagick/Decoder.php:25

 

[mkerala]

I tried updating Memory in /etc/ImageMagick-6/policy.xml to 1024MB and map to 1600MB. Still same error.

I have uninstalled ImageMagick-6 for the time being so Chevereto defaults back to GD and image upload fine.

 

[lovedigit]

Works on my website.

Comment out memory limit from policy.xml altogether, or grant at least 4GB of memory.

 

[mkerala]

Works on my website.

https://lensdump.com/i/Iv5dic

Comment out memory limit from policy.xml altogether, or grant at least 4GB of memory.

This has worked for me.

One thing I noticed was with ImageMagick it takes around 14 seconds to process the image after upload 100%. However, with GD it takes only 3-4 seconds to process after upload.

 

[mkerala]

Also, the server used about 4GB RAM to process a 12MB image.

I have switched back to GD. Seems to be light on resource and much faster.

 

[madlaxcb]

It can work well on my site.
https://imglink.org/image/iUMgu

My server:
4 CPUs,8G RAM
PHPL:7.4.8 /www/server/php/74/etc/php.ini
Graphics Library:ImageMagick 7.0.10-47 Q16 x86_64 2021-01-23 https://imagemagick.org

 

[mkerala]

It can work well on my site.
https://imglink.org/image/iUMgu

My server:
4 CPUs,8G RAM
PHPL:7.4.8 /www/server/php/74/etc/php.ini
Graphics Library:ImageMagick 7.0.10-47 Q16 x86_64 2021-01-23 https://imagemagick.org

I am getting error on the site.

 

[madlaxcb]

I am getting error on the site.

😂well.i have no idea for this.

 

[lovedigit]

Also, the server used about 4GB RAM to process a 12MB image.

I have switched back to GD. Seems to be light on resource and much faster.

ImageMagick has better processed image quality than GD though. I don't know if it is actually true, but GD's image looks less sharp to me compared to Imagemagick.

 

[mkerala]

ImageMagick has better processed image quality than GD though. I don't know if it is actually true, but GD's image looks less sharp to me compared to Imagemagick.

Does GD process the image? I thought it was only for thumbnail generation rest the original file only.

ImageMagick has significant delay when processing GIF and high memory usage.

 

[lovedigit]

Does GD process the image? I thought it was only for thumbnail generation rest the original file only.

ImageMagick has significant delay when processing GIF and high memory usage.

I was talking in general. Imagemagick has better options, quality and better performance than GD.
Not sure if chevereto does convertions, I guess not. As far as I am aware, it only process images when EXIF data is stripped, or for thumb or md images. I might be wrong.