How to Resize Animated GIF Files Without Losing Animation Quality?

How to Resize Animated GIF Files without Compromising Animation

If you're seeking to reduce the size of an animated GIF while preserving its animation, utilizing PHP is an effective solution.

Solution with ImageMagick

If your system supports ImageMagick, resizing animated GIFs is straightforward:

system("convert big.gif -coalesce coalesce.gif");
system("convert -size 200x100 coalesce.gif -resize 200x10 small.gif");

Alternatively, you can use the ImageMagick PHP plugin if system() access is unavailable.

Alternative Approach without ImageMagick

For those without access to ImageMagick, the following steps can be employed:

1. Determine if the image is an animated GIF (see PHP class for animated GIF detection).
2. Split the animated GIF into individual frames (using a PHP class for GIF frame splitting).
3. Resize the individual frames (using a PHP class for image resizing).
4. Merge the frames back into an animated GIF (using a PHP class for GIF frame composition).

This approach is more resource-intensive but still feasible. If you succeed in implementing this solution, please consider sharing it for the benefit of the community.

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