a first video frame taken java

maven dependent 
taken image of the first frame-dependent

<dependency>
   <groupId>org.bytedeco</groupId>
   <artifactId>javacv</artifactId>
   <version>0.8</version>
</dependency>

// 文件转换依赖

<dependency>
   <groupId>org.springframework</groupId>
   <artifactId>spring-test</artifactId>
   <version>RELEASE</version>
</dependency>

// Get the file name

MP4 file.getOriginalFilename = String (); 
String IMG = System.currentTimeMillis () + ".jpg"; 
path // store file 
File file2 = new new File ( "D: \\ \\ the Download" MP4 +); 
File file4 new new file = ( "D: \\ the Download \\" + img); 

// writes the incoming document to "D: \\ Download \\" + mp4

file.transferTo (file2); 
// call interception method, to be written back to the "D: \\ Download \\" + img inside the file

File1 = JiequImg.fetchFrame File (file2, file4); 
// File files into MultipartFile

= New new FileInput the FileInputStream the FileInputStream (file1); 
a MultipartFile toMultipartFile new new MockMultipartFile = ( "File", file1.getName (), "file application / JSON; charset = UTF-. 8", IOUtils.toByteArray (FileInput)); 
toMultipartFile.getInputStream () ; 
// Upload 
String S = fastDFSClientWrapper.uploadFile (file); 
// off flow (not related flow can not delete files) 
fileInput.close (); 
// delete the video 
file2.delete (); 
// delete the first frame picture 
file1 .delete ();

{class JiequImg public 

        public static fetchFrame File (File File, File file4) 
                throws Exception { 
            Long Start = System.currentTimeMillis (); 
            FFmpegFrameGrabber new new FFmpegFrameGrabber FF = (File); 
            ff.start (); 
            int lenght = ff.getLengthInFrames () ; 
            int I = 0; 
            frame F = null; 
            the while (I <lenght) { 
                //. 5 previous frame filter, to avoid all black image, according to their own circumstances 
                F = ff.grabFrame (); 
                IF ((I> . 5) && (f.image = null)) {! 
                    BREAK; 
                } 
                I ++; 
            } 
            of 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);
            //ff.flush();
            ImageIO.write(bi, "jpg", file4);
            ff.stop();
            return file4;
        }
    }