Java图片处理 - gif图获取一帧图片

Java图片处理 - gif图获取一帧图片

Java原生代码实现gif获取一帧图片

public static void main(String[] args) {
/*这儿填写你存放要缩小图片的文件夹全地址*/
String src = "c:/5.gif" ;
/*这儿填写你转化后的图片存放的文件夹*/
String tar = "c:/5_frame_2.jpg";
//        获取GIF图片一帧图片
getGifOneFrame(src, tar, 2);
}

FileImageInputStream in = null;
FileImageOutputStream out = null;
try {
in = new FileImageInputStream(new File(src));
ImageReaderSpi readerSpi = new GIFImageReaderSpi();
GIFImageReader gifReader = (GIFImageReader) readerSpi.createReaderInstance();
gifReader.setInput(in);
int num = gifReader.getNumImages(true);
//  要取的帧数要小于总帧数
if (num > frame) {
ImageWriterSpi writerSpi = new GIFImageWriterSpi();
GIFImageWriter writer = (GIFImageWriter) writerSpi.createWriterInstance();
for (int i = 0; i < num; i++) {
if (i == frame) {
File newfile = new File(target);
out = new FileImageOutputStream(newfile);
writer.setOutput(out);
//              读取读取帧的图片
writer.write(gifReader.read(i));
return true;
}
}
}

GIFImageReader

使用im4java调用ImageMagick获取gif一帧图片

public static void main(String[] args) throws Exception {

String src = "c:/test2.gif";
String target = "c:/test2_frame_1.jpg";

getGifOneFrame(src, target, 1);

System.out.println("完成");
}

/**
* 获取GIF图片一帧图片 - 同步执行
* @param src       源图片路径
* @param target    目标图片路径
* @param frame     获取第几帧
* @throws Exception
*/
public static boolean getGifOneFrame(String src, String target, int frame) throws Exception {
if(!src.endsWith(".gif")){
return false;
}
createDirectory(target);
IMOperation op = new IMOperation();
op.addImage(src + "["+frame+"]");
op.addImage(target);
ConvertCmd cmd = (ConvertCmd) getImageCommand("convert");
cmd.setAsyncMode(false);
cmd.run(op);
return true;
}