本帖最后由 biu波儿了罢 于 2018-12-26 12:57 编辑
方法一:使用第三方jar包截取 1、导入依赖 [XML] 纯文本查看 复制代码 <dependency>
<groupId>org.bytedeco</groupId>
<artifactId>javacv</artifactId>
<version>0.8</version>
</dependency>
2、示例
[Java] 纯文本查看 复制代码 package com.zemel.video;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.io.File;
import javax.imageio.ImageIO;
import org.bytedeco.javacpp.opencv_core.IplImage;
import org.bytedeco.javacv.FFmpegFrameGrabber;
import org.bytedeco.javacv.Frame;
public class Test {
/**
* 获取指定视频的帧并保存为图片至指定目录
* @param 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++;
}
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 {
Test.fetchFrame("D:\\biudata\\vedio\\1523598768844GFE2GWDDM8.mp4", "D:\\biudata\\vedio\\test5.jpg");
} catch (Exception e) {
e.printStackTrace();
}
}
}
方法二:使用ffmpeg
1、下载ffmpeg工具(http://ffmpeg.org/)
2、代码
[Java] 纯文本查看 复制代码 public static boolean processImg(String veido_path, String ffmpeg_path) {
File file = new File(veido_path);
if (!file.exists()) {
System.err.println("路径[" + veido_path + "]对应的视频文件不存在!");
return false;
}
List<String> commands = new java.util.ArrayList<String>();
commands.add(ffmpeg_path);
commands.add("-i");
commands.add(veido_path);
commands.add("-y");
commands.add("-f");
commands.add("image2");
commands.add("-ss");
commands.add("8");// 这个参数是设置截取视频多少秒时的画面
// commands.add("-t");
// commands.add("0.001");
commands.add("-s");
commands.add("700x525");
commands.add(veido_path.substring(0, veido_path.lastIndexOf("."))
.replaceFirst("vedio", "file") + ".jpg");
try {
ProcessBuilder builder = new ProcessBuilder();
builder.command(commands);
builder.start();
System.out.println("截取成功");
return true;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
public static void main(String[] args) {
processImg("D:\\biudata\\vedio\\15235879054813G0I1783E2.mp4",
"F:\\开发工具\\ffmpeg.exe");
}
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