使用PHP ImageMagick库在动画gif中添加水印

Question

这适用于无动画图像：

$image = new Imagick($file);

$format = strtolower($image->getImageFormat());

$watermark = new Imagick('watermark.png');
$watermark->scaleImage($image->getImageWidth(), $watermark->getImageHeight());

$image->addImage($watermark);

$image->resetIterator();
$combined = $image->appendImages(true);

$data = base64_encode($combined->getImageBlob());

echo '<img src="data:image/' . $format . ';base64,' . $data . '">';

我如何才能使此功能适用于动画gif？它只是把每一帧都放在另一帧下面，水印放在下面。

Answer 1

请看下面的网址，我相信这对你是非常有帮助的：

Watermark on animated gif with php

尝尝这个

$animation = ani.gif; 

$watermark = logo.png; 

$watermarked_animation = "morph.gif"; 

$cmd = " $animation -coalesce -gravity South ". 
" -geometry +0+0 null: $watermark -layers composite -layers optimize "; 

exec("convert $cmd $watermarked_animation "); 

另请参阅

http://www.imagemagick.org/Usage/anim_mods/#composite

http://www.imagemagick.org/discourse-server/viewtopic.php?f=1&t=21730