Java之如何截取视频第一帧
作者：上官天夜
这篇文章主要介绍了Java之如何截取视频第一帧问题，具有很好的参考价值，希望对大家有所帮助。如有错误或未考虑完全的地方，望不吝赐教
Java截取视频第一帧
方法一：使用第三方jar包截取
1、导入依赖
<dependency> <groupId>org.bytedeco</groupId> <artifactId>javacv</artifactId> <version>0.8</version> </dependency>
2、示例
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
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");
}Java截取视频第一帧返回InputStream，用于视频上传后作为封面
引入maven依赖
<dependency> <groupId>org.bytedeco</groupId> <artifactId>javacv-platform</artifactId> <version>1.4.3</version> </dependency>
因为上面的依赖包含的jar包太多，所以我们需要排除一些东西
<dependency> <groupId>org.bytedeco</groupId> <artifactId>javacv</artifactId> <version>1.4.3</version> <exclusions> <exclusion> <groupId>org.bytedeco</groupId> <artifactId>javacpp</artifactId> </exclusion> <exclusion> <groupId>org.bytedeco.javacpp-presets</groupId> <artifactId>flycapture</artifactId> </exclusion> <exclusion> <groupId>org.bytedeco.javacpp-presets</groupId> <artifactId>libdc1394</artifactId> </exclusion> <exclusion> <groupId>org.bytedeco.javacpp-presets</groupId> <artifactId>libfreenect</artifactId> </exclusion> <exclusion> <groupId>org.bytedeco.javacpp-presets</groupId> <artifactId>libfreenect2</artifactId> </exclusion> <exclusion> <groupId>org.bytedeco.javacpp-presets</groupId> <artifactId>librealsense</artifactId> </exclusion> <exclusion> <groupId>org.bytedeco.javacpp-presets</groupId> <artifactId>videoinput</artifactId> </exclusion> <exclusion> <groupId>org.bytedeco.javacpp-presets</groupId> <artifactId>opencv</artifactId> </exclusion> <exclusion> <groupId>org.bytedeco.javacpp-presets</groupId> <artifactId>tesseract</artifactId> </exclusion> <exclusion> <groupId>org.bytedeco.javacpp-presets</groupId> <artifactId>leptonica</artifactId> </exclusion> <exclusion> <groupId>org.bytedeco.javacpp-presets</groupId> <artifactId>flandmark</artifactId> </exclusion> <exclusion> <groupId>org.bytedeco.javacpp-presets</groupId> <artifactId>artoolkitplus</artifactId> </exclusion> </exclusions> </dependency> <dependency> <groupId>org.bytedeco</groupId> <artifactId>javacv-platform</artifactId> <version>1.4.3</version> <exclusions> <exclusion> <groupId>org.bytedeco</groupId> <artifactId>javacv</artifactId> </exclusion> <exclusion> <groupId>org.bytedeco.javacpp-presets</groupId> <artifactId>flycapture-platform</artifactId> </exclusion> <exclusion> <groupId>org.bytedeco.javacpp-presets</groupId> <artifactId>libdc1394-platform</artifactId> </exclusion> <exclusion> <groupId>org.bytedeco.javacpp-presets</groupId> <artifactId>libfreenect-platform</artifactId> </exclusion> <exclusion> <groupId>org.bytedeco.javacpp-presets</groupId> <artifactId>libfreenect2-platform</artifactId> </exclusion> <exclusion> <groupId>org.bytedeco.javacpp-presets</groupId> <artifactId>librealsense-platform</artifactId> </exclusion> <exclusion> <groupId>org.bytedeco.javacpp-presets</groupId> <artifactId>videoinput-platform</artifactId> </exclusion> <exclusion> <groupId>org.bytedeco.javacpp-presets</groupId> <artifactId>opencv-platform</artifactId> </exclusion> <exclusion> <groupId>org.bytedeco.javacpp-presets</groupId> <artifactId>tesseract-platform</artifactId> </exclusion> <exclusion> <groupId>org.bytedeco.javacpp-presets</groupId> <artifactId>leptonica-platform</artifactId> </exclusion> <exclusion> <groupId>org.bytedeco.javacpp-presets</groupId> <artifactId>flandmark-platform</artifactId> </exclusion> <exclusion> <groupId>org.bytedeco.javacpp-presets</groupId> <artifactId>artoolkitplus-platform</artifactId> </exclusion> </exclusions> </dependency>
获取视频帧返回InputStream
public class getImgUtil {
// 获取要取得的帧数
private static final int fifthFrame= 5;
/**
* @param InputStream 需要截取帧的视频的字节输入流
*
* @return
*/
public static InputStream getImg(InputStream is) {
FFmpegFrameGrabber grabber;
InputStream img=null ;
try {
grabber = new FFmpegFrameGrabber(is);
grabber.start();
// 视频总帧数
int videoLength = grabber.getLengthInFrames();
Frame frame = null;
int i = 0;
while (i < videoLength) {
// 过滤前5帧,因为前5帧可能是全黑的
frame = grabber.grabFrame();
if ((i > fifthFrame) && (frame.image != null)) {
break;
}
i++;
}
Java2DFrameConverter converter = new Java2DFrameConverter();
// 绘制图片
BufferedImage bi = converter.getBufferedImage(frame);
img = bufferedImageToInputStream(bi);
grabber.stop();
grabber.close();
} catch (IOException e) {
e.printStackTrace();
}
return img;
}
/**
* 将BufferedImage转换为InputStream
* @param image
* @return
*/
public static InputStream bufferedImageToInputStream(BufferedImage image){
ByteArrayOutputStream os = new ByteArrayOutputStream();
try {
ImageIO.write(image, "png", os);
InputStream input = new ByteArrayInputStream(os.toByteArray());
return input;
} catch (IOException e) {
}
return null;
}总结
以上为个人经验，希望能给大家一个参考，也希望大家多多支持脚本之家。