ImageIO.write慢吗? [英] ImageIO.write slow?

问题描述

我有一个应用程序，其中我每秒写入大约25个png图像文件到磁盘.

I've an application where I'm writing around 25 png image files to disk every second.

BufferedImage img = getBufferedImage();
// code below is very slow ~150ms.
File file = new File(count++ + ".png");
BufferedOutputStream os = new BufferedOutputStream(new FileOutputStream(file));
ImageIO.write(img, "png", os);

每个呼叫通常需要150毫秒，因此无法达到25fps.我可以缓冲IO以便不丢失任何帧吗?

It usually takes 150ms per call, and achieving 25fps hence becomes impossible. Can I buffer IO so that I don't drop any frames?

推荐答案

PNG编码需要一段时间，并且您无法通过任何缓冲对其进行改进...如果要提高速度，请使用BMP(这会消耗您的BMP)HDD)，或者如果不需要像素质量，请尝试JPG(应比PNG更快地进行编码).

PNG encoding takes a while and you can't improve it with any buffering ... if you want a speed up, use BMP (which will eat up your HDD) or if pixel-quality is not needed, try JPG (which should get encoded faster than PNG).

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