java上传视频并且截取当前视频第一帧

悠悠 2023-02-26 12:29 14阅读 0赞

## java上传视频并且截取当前视频第一帧 ##

1.Maven依赖

<dependency>
                <groupId>org.bytedeco</groupId>
                <artifactId>javacpp</artifactId>
                <version>1.4.1</version>
            </dependency>
            <dependency>
                <groupId>org.bytedeco</groupId>
                <artifactId>javacv</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.FileImageUtil

/** * Created by ls on 2020/7/15. */
    **
     * Created by ls on 2020/7/15.
     */
    public class FileImageUtil { 
    
        /** * 获取指定视频的帧并保存为图片至指定目录 * @param filePath 视频存放的地址 例如：D:/ruoyi/uploadPath/avatar/123.mp4 * @param targetFilePath 截图存放的地址 D:/ruoyi/uploadPath/images * @param targetFileName 截图保存的文件名称 123 * @return 图片的地址 * @throws Exception */
        public static String executeCodecs(String filePath, String targetFilePath, String targetFileName) throws Exception { 
            try{ 
                FFmpegFrameGrabber ff = FFmpegFrameGrabber.createDefault(filePath);
                ff.start();
                String rotate =ff.getVideoMetadata("rotate");
                Frame f;
                int i = 0;
                String  fileName=null;
                while (i <1) { 
                    f =ff.grabImage();
                    IplImage src = null;
                    if(null !=rotate &&rotate.length() > 1) { 
                        OpenCVFrameConverter.ToIplImage converter =new OpenCVFrameConverter.ToIplImage();
                        src =converter.convert(f);
                        f =converter.convert(rotate(src, Integer.valueOf(rotate)));
                    }
                    fileName= doExecuteFrame(f, targetFilePath, targetFileName);
                    i++;
                }
                ff.stop();
                return fileName;
            }catch (Exception e){ 
                e.printStackTrace();
            }
            return null;
        }
    
        /* * 旋转角度的 */
        public static IplImage rotate(IplImage src, int angle) { 
            IplImage img = IplImage.create(src.height(), src.width(), src.depth(), src.nChannels());
            opencv_core.cvTranspose(src, img);
            opencv_core.cvFlip(img, img, angle);
            return img;
        }
    
    
        public static String doExecuteFrame(Frame f, String targetFilePath, String targetFileName) { 
    
            if (null ==f ||null ==f.image) { 
                return null;
            }
            Java2DFrameConverter converter =new Java2DFrameConverter();
            String imageMat ="jpg";
            String fileName =targetFilePath + "/" +targetFileName +"." +imageMat;
            BufferedImage bi =converter.getBufferedImage(f);
            System.out.println("width:" + bi.getWidth());//打印宽、高
            System.out.println("height:" + bi.getHeight());
            File file =new File(fileName);
            try { 
                ImageIO.write(bi,imageMat,file);
            }catch (IOException e) { 
                e.printStackTrace();
            }
            return fileName;
        }
    
    }