1.maven
<dependency>
<groupId>org.bytedeco</groupId>
<artifactId>javacv</artifactId>
<version>1.4.1</version>
</dependency>
<dependency>
<groupId>org.bytedeco</groupId>
<artifactId>javacpp</artifactId>
<version>1.4.1</version>
</dependency>
<dependency>
<groupId>org.bytedeco.javacpp-presets</groupId>
<artifactId>opencv-platform</artifactId>
<version>3.4.1-1.4.1</version>
</dependency>
<dependency>
<groupId>org.bytedeco.javacpp-presets</groupId>
<artifactId>ffmpeg-platform</artifactId>
<version>3.4.2-1.4.1</version>
</dependency>
2.工具类
import org.bytedeco.javacpp.opencv_core;import org.bytedeco.javacpp.opencv_videoio;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;import java.awt.*;import java.awt.image.BufferedImage;import java.io.File;import java.util.*;import java.util.List;import static org.bytedeco.javacpp.opencv_imgcodecs.cvSaveImage;import static org.bytedeco.javacpp.opencv_videoio.*;/** * 视频工具 * * @author */public class VideoUtil { private static final int SECOND = 50; private static final Logger logger = LoggerFactory.getLogger(VideoUtil.class); /** * 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 * @param saveFile 截取帧的图片存放路径 * @throws Exception */ public static List<File> fetchPic(File videoFile, String saveFile, int second) throws Exception { java.util.List<File> files = new ArrayList<>(); FFmpegFrameGrabber ff = new FFmpegFrameGrabber(videoFile); ff.start(); int lenght = ff.getLengthInAudioFrames(); System.out.println(ff.getFrameRate()); int i = 0; Frame frame = 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 frame = ff.grabImage(); if (i >= (int) (ff.getFrameRate() * second) && frame.image != null) { System.out.print(i + ","); if (frame != null && frame.image != null) { System.out.println(i); files.add(writeToFile(frame, saveFile, i)); } second++; } i += second; } ff.stop(); return files; } public static List<Integer> getList(int count, int length) { if (count > length) { count = length; } System.out.println(length); System.out.println(count); int total = (int) (length / count); List<Integer> list = new ArrayList<>(); for (int i = 0; i < count; i++) { list.add(i * total); System.out.println(i * total); } return list; } public static List<File> fetchPicByCount(File videoFile, String saveFile, int count) throws Exception { java.util.List<File> files = new ArrayList<>(); FFmpegFrameGrabber ff = new FFmpegFrameGrabber(videoFile); ff.start(); int frameLength = ff.getLengthInFrames(); System.out.println("length:" + frameLength); List<Integer> list = getList(count, frameLength); System.out.println(ff.getFrameRate()); int i = 0; Frame frame = null; while (i < frameLength) { frame = ff.grabImage(); if (list.contains(i)) { if (frame != null && frame.image != null) { System.out.println(i); files.add(writeToFile(frame, saveFile, i)); } } i++; } ff.stop(); return files; } public static File writeToFile(Frame frame, String saveFile, int second) throws InvokeException { String fileName = String.valueOf(System.currentTimeMillis()) + second; File targetFile = new File(saveFile + File.separator + fileName + ".jpg"); String imgSuffix = "jpg"; Java2DFrameConverter converter = new Java2DFrameConverter(); BufferedImage srcBi = converter.getBufferedImage(frame); int owidth = srcBi.getWidth(); int oheight = srcBi.getHeight(); // 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(srcBi.getScaledInstance(width, height, Image.SCALE_SMOOTH), 0, 0, null); try { ImageIO.write(bi, imgSuffix, targetFile); } catch (Exception e) { throw new InvokeException(ResultEnum.FAILED.getCode(), "截帧失败"); } return targetFile; } /** * 获取视频时长，单位为秒 * * @param file * @return 时长（s） */ public static Long getVideoTime(File file) { Long times = 0L; try { FFmpegFrameGrabber ff = new FFmpegFrameGrabber(file); ff.start(); times = ff.getLengthInTime() / (1000 * 1000); ff.stop(); } catch (Exception e) { e.printStackTrace(); } return times; } public static void getBySecond(String filePath, String directory) { opencv_videoio.CvCapture capture = cvCaptureFromFile(filePath); //帧率 double fps = cvGetCaptureProperty(capture, CV_CAP_PROP_FRAME_COUNT); System.out.println("帧率:" + fps); opencv_core.IplImage frame = null; double pos1 = 0; double rootCount = 0; while (true) { //读取关键帧 frame = cvQueryFrame(capture); rootCount = fps; while (rootCount > 0) { //这一段的目的是跳过每一秒钟的帧数,也就是说fps是帧率(一秒钟有多少帧),在读取一帧后,跳过fps数量的帧就相当于跳过了1秒钟。 frame = cvQueryFrame(capture); rootCount--; } //获取当前帧的位置 pos1 = cvGetCaptureProperty(capture, CV_CAP_PROP_POS_FRAMES); System.out.println(pos1); if (null == frame) break; cvSaveImage("E:/223/" + pos1 + ".jpg", frame); } cvReleaseCapture(capture); } /*public void getBySecond() { opencv_videoio.CvCapture capture = opencv_highgui.cvC("D:/085402.crf"); //帧率 int fps = (int) opencv_highgui.cvGetCaptureProperty(capture, opencv_highgui.CV_CAP_PROP_FPS); System.out.println("帧率:"+fps); opencv_core.IplImage frame = null; double pos1 = 0; int rootCount = 0; while (true) { //读取关键帧 frame = opencv_highgui.cvQueryFrame(capture); rootCount = fps; while(rootCount > 0 ){ //这一段的目的是跳过每一秒钟的帧数,也就是说fps是帧率(一秒钟有多少帧),在读取一帧后,跳过fps数量的帧就相当于跳过了1秒钟。 frame = opencv_highgui.cvQueryFrame(capture); rootCount--; } //获取当前帧的位置 pos1 = opencv_highgui.cvGetCaptureProperty(capture,opencv_highgui.CV_CAP_PROP_POS_FRAMES); System.out.println(pos1); if (null == frame) break; opencv_highgui.cvSaveImage("d:/img/" + pos1 + ".jpg",frame); } opencv_highgui.cvReleaseCapture(capture); }*/ public static void main(String[] args) { try { //getList(10,113); File file = new File("E:/2.mp4"); List<File> files = VideoUtil.fetchPicByCount(file, "E:/223", 100); System.out.println(files.get(0).getName()); System.out.println(VideoUtil.getVideoTime(file)); } catch (Exception e) { e.printStackTrace(); } }}
参考:https://blog.csdn.net/qq\_22175485/article/details/81025525
