目录
两种视频处理方式介绍
jave方式
Javacv的方式
两种视频处理方式介绍
- 一种jave获取视频信息,使用FFmpeg方式截取视频第n帧生成图片
- 需要下载一个ffmpeg.exe文件
- 一种是通过Javacv的方式获取视频信息和截图
jave方式
public static void main(String[] args) {
String videoPath = "D:\\szw\\photo\\test\\55f9e02108b642.mp4";
String ffmpegPath = "src/main/resources/libs/ffmpeg.exe";
getVideoInfo(videoPath);
processImg(videoPath, "1", ffmpegPath);
}
- 几种pom依赖
<dependency>
<groupId>it.sauronsoftware</groupId>
<artifactId>jave</artifactId>
<version>1.0.2</version>
</dependency>
<dependency>
<groupId>com.github.dadiyang</groupId>
<artifactId>jave</artifactId>
<version>1.0.2</version>
</dependency>
<!-- https://mvnrepository.com/artifact/ws.schild/jave-core -->
<dependency>
<groupId>ws.schild</groupId>
<artifactId>jave-core</artifactId>
<version>2.7.3</version>
</dependency>
- VideoUtil:
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.math.BigDecimal;
import java.math.RoundingMode;
import java.nio.channels.FileChannel;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import it.sauronsoftware.jave.Encoder;
import org.apache.commons.lang.StringUtils;
import org.bytedeco.javacv.FFmpegFrameGrabber;
import org.bytedeco.javacv.Frame;
import org.bytedeco.javacv.Java2DFrameConverter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.imageio.ImageIO;
/**
* 视频工具类
*
* @Author: szw
* @Date: 2020/7/9 9:42
*/
public class VideoUtil {
private static final Logger LOGGER = LoggerFactory.getLogger(VideoUtil.class);
/**
* 通过jave方式获取视频信息
* @param realPath 视频文件路径
* @return Map<String, Object>
*/
public static Map<String, Object> getVideoInfo(String realPath) {
FileInputStream fis;
File source = new File(realPath);
Encoder encoder = new Encoder();
FileChannel fc = null;
Map<String, Object> result = new HashMap<String, Object>();
try {
it.sauronsoftware.jave.MultimediaInfo m = encoder.getInfo(source);
long ls = m.getDuration();
LOGGER.debug("此视频时长为:" + ls / 60000 + "分" + (ls) / 1000 + "秒!");
// 视频帧宽高
LOGGER.debug("此视频高度为:" + m.getVideo().getSize().getHeight());
LOGGER.debug("此视频宽度为:" + m.getVideo().getSize().getWidth());
LOGGER.debug("此视频格式为:" + m.getFormat());
result.put("videoHigh", m.getVideo().getSize().getHeight());
result.put("videoWide", m.getVideo().getSize().getWidth());
result.put("format", m.getFormat());
fis = new FileInputStream(source);
fc = fis.getChannel();
BigDecimal fileSize = new BigDecimal(fc.size());
String size = fileSize.divide(new BigDecimal(1048576), 2, RoundingMode.HALF_UP) + "MB";
LOGGER.debug("此视频大小为" + size);
result.put("size", size);
return result;
} catch (Exception e) {
e.printStackTrace();
return result;
} finally {
if (null != fc) {
try {
fc.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
/**
* 使用 FFmpeg 截取视频第几帧生成图片
*
* @param videoPath 视频路径
* @param frame 第几帧
* @param utilPath 工具包地址
* @return String 图片的相对路劲
*/
public static String processImg(String videoPath, String frame, String utilPath) {
File file = new File(videoPath);
if (!file.exists()) {
System.err.println("路径[" + videoPath + "]对应的视频文件不存在!");
return null;
}
List<String> commands = new java.util.ArrayList<String>();
commands.add(utilPath);
commands.add("-i");
commands.add(videoPath);
commands.add("-y");
commands.add("-f");
commands.add("image2");
commands.add("-ss");
commands.add(frame); // 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("800x1200"); // 宽X高
String imgPath = videoPath.substring(0, videoPath.lastIndexOf(".")) + "-cover" + ".jpg";
commands.add(imgPath);
try {
ProcessBuilder builder = new ProcessBuilder();
builder.command(commands);
builder.redirectErrorStream(true);
LOGGER.debug("视频截图开始...");
Process process = builder.start();
InputStream in = process.getInputStream();
// 写入本地
FileUtil.writeToLocal(imgPath, in);
LOGGER.debug("截取成功");
return imgPath;
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
}
Javacv的方式
JavaCV是一个计算机视觉领域的封装库,封装了包括 OpenCV,FFmpeg 等
GitHub: https://github.com/bytedeco/javacv
OpenCV 的文档地址: https://docs.opencv.org/master
public static void main(String[] args) {
String videoPath = "D:\\szw\\photo\\test\\55f9e02108b642.mp4";
Map<String, Object> screenshot = getScreenshot(videoPath);
System.out.println(screenshot);
}
- pom依赖,我的后来版本改到1.5.3了
<version>1.5.3</version><dependency>
<groupId>org.bytedeco</groupId>
<artifactId>javacv-platform</artifactId>
<version>1.3.1</version>
</dependency>
- VideoUtil
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.math.BigDecimal;
import java.math.RoundingMode;
import java.nio.channels.FileChannel;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import it.sauronsoftware.jave.Encoder;
import org.apache.commons.lang.StringUtils;
import org.bytedeco.javacv.FFmpegFrameGrabber;
import org.bytedeco.javacv.Frame;
import org.bytedeco.javacv.Java2DFrameConverter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.imageio.ImageIO;
/**
* 视频工具类
*
* @Author: szw
* @Date: 2020/7/9 9:42
*/
public class VideoUtil {
private static final Logger LOGGER = LoggerFactory.getLogger(VideoUtil.class);
/**
* 通过Javacv的方式获取视频截图
*
* @param filePath 视频文件路径
* @return Map<String, Object>
*/
public static Map<String, Object> getScreenshot(String filePath) {
try {
LOGGER.debug("截取视频截图开始:" + System.currentTimeMillis());
Map<String, Object> result = new HashMap<String, Object>();
FFmpegFrameGrabber grabber = FFmpegFrameGrabber.createDefault(filePath);
// 第一帧图片存储位置
String targerFilePath = filePath.substring(0, filePath.lastIndexOf("\\"));
// 视频文件名
String fileName = filePath.substring(filePath.lastIndexOf("\\") + 1);
// 图片名称
String targetFileName = fileName.substring(0, fileName.lastIndexOf("."));
LOGGER.debug("视频路径是:" + targerFilePath);
LOGGER.debug("视频文件名:" + fileName);
LOGGER.debug("图片名称是:" + targetFileName);
grabber.start();
//设置视频截取帧(默认取第一帧)
Frame frame = grabber.grabImage();
//视频旋转度
String rotate = grabber.getVideoMetadata("rotate");
Java2DFrameConverter converter = new Java2DFrameConverter();
//绘制图片
BufferedImage bi = converter.getBufferedImage(frame);
if (rotate != null) {
// 旋转图片
bi = rotate(bi, Integer.parseInt(rotate));
}
//图片的类型
String imageMat = "jpg";
//图片的完整路径
String imagePath = targerFilePath + File.separator + targetFileName + "." + imageMat;
//创建文件
File output = new File(imagePath);
ImageIO.write(bi, imageMat, output);
//拼接Map信息
result.put("videoWide", bi.getWidth());
result.put("videoHigh", bi.getHeight());
long duration = grabber.getLengthInTime() / (1000 * 1000);
result.put("rotate", StringUtils.isBlank(rotate) ? "0" : rotate);
result.put("format", grabber.getFormat());
result.put("imgPath", output.getPath());
result.put("time", duration);
LOGGER.debug("视频的宽:" + bi.getWidth());
LOGGER.debug("视频的高:" + bi.getHeight());
LOGGER.debug("视频的旋转度:" + rotate);
LOGGER.debug("视频的格式:" + grabber.getFormat());
LOGGER.debug("此视频时长(s/秒):" + duration);
grabber.stop();
LOGGER.debug("截取视频截图结束:" + System.currentTimeMillis());
return result;
} catch (Exception e) {
LOGGER.error("VideoUtil getScreenshot fail: {}", ExceptionStackTrace.printStackTrace(e));
return null;
}
}
/**
* 根据视频旋转度来调整图片
*
* @param src BufferedImage
* @param angel angel 视频旋转度
* @return BufferedImage
*/
public static BufferedImage rotate(BufferedImage src, int angel) {
int src_width = src.getWidth(null);
int src_height = src.getHeight(null);
int type = src.getColorModel().getTransparency();
Rectangle rect_des = calcRotatedSize(new Rectangle(new Dimension(src_width, src_height)), angel);
BufferedImage bi = new BufferedImage(rect_des.width, rect_des.height, type);
Graphics2D g2 = bi.createGraphics();
g2.translate((rect_des.width - src_width) / 2, (rect_des.height - src_height) / 2);
g2.rotate(Math.toRadians(angel), src_width / 2, src_height / 2);
g2.drawImage(src, 0, 0, null);
g2.dispose();
return bi;
}
/**
* 计算图片旋转大小
*
* @param src Rectangle
* @param angel int
* @return Rectangle
*/
public static Rectangle calcRotatedSize(Rectangle src, int angel) {
if (angel >= 90) {
if (angel / 90 % 2 == 1) {
int temp = src.height;
src.height = src.width;
src.width = temp;
}
angel = angel % 90;
}
double r = Math.sqrt(src.height * src.height + src.width * src.width) / 2;
double len = 2 * Math.sin(Math.toRadians(angel) / 2) * r;
double angel_alpha = (Math.PI - Math.toRadians(angel)) / 2;
double angel_dalta_width = Math.atan((double) src.height / src.width);
double angel_dalta_height = Math.atan((double) src.width / src.height);
int len_dalta_width = (int) (len * Math.cos(Math.PI - angel_alpha - angel_dalta_width));
int len_dalta_height = (int) (len * Math.cos(Math.PI - angel_alpha - angel_dalta_height));
int des_width = src.width + len_dalta_width * 2;
int des_height = src.height + len_dalta_height * 2;
return new java.awt.Rectangle(new Dimension(des_width, des_height));
}
}
问题解决
main方法测试没问题,项目运行后报系统找不到指定的文件,(虽然能运行但一堆报错看着也不舒服)
java.io.FileNotFoundException: D:\szw\repository\org\bytedeco\tesseract-platform\4.1.1-1.5.3\tesseract-windows-x86_64.jar (系统找不到指定的文件。)
找到报错jar位置,解压(没有打jar包软件用360压缩打开) -> META-INF -> MANIFEST.MF ->打开文件找到Class-Path 删除 ->再打包回jar
重新运行
报错jar修改后就正常了
也可以下载我删减好的->0积分免费下载
javaCV所有相关jar删减完成版:
javaCV所有相关jar未删减版: