如何从动画GIF中获取长度(及时) [英] How to get length (in time) from an animated GIF

问题描述

是否有办法找出单循环动画GIF需要多长时间?

Is there a way to find out how long a single-loop animated GIF will take to finish?

推荐答案

好吧，具体的排序方式取决于您用来操纵这些动画GIF的接口(我不知道原生Java/AWT/Swing)，但是基本思想是计算(帧速率*帧数).

Well, the specifics sorta depends on what interface you're using to manipulate those animated GIFs (I'm not aware of a real slick way in native Java/AWT/Swing), however the basic idea would to calculate (frame rate * number of frames).

如果您要手动编写GIF操纵工具，建议您查看

If you're coding a GIF manipulation tool by hand, I recommend taking a look at http://www.onicos.com/staff/iz/formats/gif.html

希望这至少会有所帮助.

Hope this helps at least a little.

更新:尝试实现ImageObserver接口.查看该类中的ImageObserver.FRAMEBITS标志，以检测帧更新. http://docs.oracle.com/javase/6/docs/api/java/awt/image/ImageObserver.html

Update: Try implement the ImageObserver interface. Take a look at the ImageObserver.FRAMEBITS flag in that class to detect frame updates. http://docs.oracle.com/javase/6/docs/api/java/awt/image/ImageObserver.html

这仍然留下了gif有多少帧的问题.您可能想尝试看看Image.getProperty()函数.我在查找有关是否有框架"属性的文档时遇到了一些困难，但请看一下.

This still leaves the question of how many frames the gif has. You might want to try taking a look at the Image.getProperty() function. I'm having some difficulty finding documentation as to whether there's a "frame" property, but take a look.

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