有个项目用到,需要上传视频,并提取一针图片.
百度大法后整理如下.
依赖使用maven
[XML] 纯文本查看 复制代码 <dependency>
<groupId>org.bytedeco</groupId>
<artifactId>javacv</artifactId>
<version>0.8</version>
</dependency>
代码如下
[Java] 纯文本查看 复制代码 public class CreateImage {
/**
* 获取指定视频的帧并保存为图片至指定目录
* [url=home.php?mod=space&uid=952169]@Param[/url] videofile 源视频文件路径
* @param framefile 截取帧的图片存放路径
* @throws Exception
*/
public static void fetchFrame(String videofile, String framefile)
throws Exception {
long start = System.currentTimeMillis();
File targetFile = new File(framefile);
FFmpegFrameGrabber ff = new FFmpegFrameGrabber(videofile);
ff.start();
int lenght = ff.getLengthInFrames();
int i = 0;
Frame f = null;
while (i < lenght) {
// 过滤前5帧,避免出现全黑的图片,依自己情况而定
f = ff.grabFrame();
if ((i > 5) && (f.image != null)) {
break;
}
i++;
}
opencv_core.IplImage img = f.image;
int owidth = img.width();
int oheight = img.height();
// 对截取的帧进行等比例缩放
int width = 800;
int height = (int) (((double) width / owidth) * oheight);
BufferedImage bi = new BufferedImage(width, height, BufferedImage.TYPE_3BYTE_BGR);
bi.getGraphics().drawImage(f.image.getBufferedImage().getScaledInstance(width, height, Image.SCALE_SMOOTH),
0, 0, null);
ImageIO.write(bi, "jpg", targetFile);
//ff.flush();
ff.stop();
System.out.println(System.currentTimeMillis() - start);
}
public static void main(String[] args) {
try {
CreateImage.fetchFrame("D:\\1.mp4", "D:\\test5.jpg");
} catch (Exception e) {
e.printStackTrace();
}
}
} |