从imageReader写回修改后的图像

我从动画gif中读取分离的图像，我只需要在frames[i]对它们进行更改，然后将它们设置回文件并以writer作为新文件保存。

  File file = new File("gif1.gif"); ImageReader reader = ImageIO.getImageReadersBySuffix("GIF").next(); ImageInputStream in = ImageIO.createImageInputStream(file); reader.setInput(in); File output = new File("k.gif"); ImageWriter writer = ImageIO.getImageWritersBySuffix("GIF").next(); ImageOutputStream out = ImageIO.createImageOutputStream(file); writer.setOutput(out); int numImages = reader.getNumImages(true); BufferedImage[] frames = new BufferedImage[pocetObrazku]; for (int i = 0; i < numImages; i++) { BufferedImage image = reader.read(i); frames[i] = reader.read(i); } 

我会很高兴得到任何帮助。

Answer 1

坦克@StanislavL的链接（ https://community.oracle.com/thread/1264385 ）在评论中，它真的很有帮助。 有我的解决方案：

 File file = new File("gif1.gif"); ImageReader reader = ImageIO.getImageReadersBySuffix("GIF").next(); ImageInputStream in = ImageIO.createImageInputStream(file); reader.setInput(in); int numImages = reader.getNumImages(true); BufferedImage[] frames = new BufferedImage[pocetObrazku]; File fileOut = new File("k.gif"); fileOut.createNewFile(); ImageWriter iw = ImageIO.getImageWritersByFormatName("gif").next(); ImageOutputStream ios = ImageIO.createImageOutputStream(fileOut); iw.setOutput(ios); iw.prepareWriteSequence(null); for (int i = 0; i < numImages ; i++) { BufferedImage image = reader.read(i); frames[i] = reader.read(i); IIOMetadata metadata = reader.getImageMetadata(i); IIOImage ii = new IIOImage(image, null, metadata); iw.writeToSequence(ii, (ImageWriteParam) null); }