在实现了minio文件上传的基础上进行操作

一、编写pom

<dependency>
    <groupId>org.jcodec</groupId>
    <artifactId>jcodec</artifactId>
    <version>0.2.5</version>
</dependency>
<dependency>
    <groupId>org.jcodec</groupId>
    <artifactId>jcodec-javase</artifactId>
    <version>0.2.5</version>
</dependency>

二、新增创建FileItem的方法

@Slf4j
public class FileUtil {

    // 默认文件名
    private static final String defaultFilename = "file";

    public static FileItem createFileItem(InputStream inputStream) {
        final String filename = defaultFilename + "." +  MediaType.IMAGE_JPEG.getSubtype();
        FileItemFactory factory = new DiskFileItemFactory(16, null);
        FileItem item = factory.createItem(filename, MediaType.MULTIPART_FORM_DATA_VALUE, true, filename);
        try(OutputStream os = item.getOutputStream()) {
            IOUtils.copy(inputStream, os);
        } catch (IOException e) {
            log.error("create fileItem stream copy occurred exception", e);
            throw new VideoFrameException(VideoFrameExceptionTypes.FILE_CREATE_FAILED);
        }
        return item;
    }
}

三、视频工具类获取帧

@Slf4j
public class VideoUtil {

    private static final List<String> videoSuffix = Arrays.asList(
            "avi", "wmv", "mov", "mpg", "mpeg", "rm", "ram", "flv", "swf", "mp4"
    );

    public static MultipartFile getFirstFrame(MultipartFile videoFile) {
        return getFrame(videoFile, 1);
    }

    public static MultipartFile getFrame(MultipartFile multipartFile, int frameNumber) {
        String originalFilename = multipartFile.getOriginalFilename();
        if (StringUtils.isBlank(originalFilename) || !originalFilename.contains(".")) {
            throw new VideoFrameException(VideoFrameExceptionTypes.NOT_SUPPORTED_FILE_TYPE);
        }
        String[] filenameSplit = originalFilename.split("\\.");
        if (!videoSuffix.contains(filenameSplit[filenameSplit.length - 1])) {
            throw new VideoFrameException(VideoFrameExceptionTypes.NOT_SUPPORTED_FILE_TYPE);
        }
        CommonsMultipartFile cf = (CommonsMultipartFile) multipartFile;
        DiskFileItem fi = (DiskFileItem) cf.getFileItem();
        File file = fi.getStoreLocation();
        MultipartFile videoCover = null;
        try {
            Picture pic = FrameGrab.getFrameFromFile(file, frameNumber);
            BufferedImage bi = AWTUtil.toBufferedImage(pic);
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            ImageIO.write(bi, MediaType.IMAGE_JPEG.getSubtype(), baos);
            InputStream input = new ByteArrayInputStream(baos.toByteArray());
            FileItem fileItem = FileUtil.createFileItem(input);
            videoCover = new CommonsMultipartFile(fileItem);
        } catch (IOException | JCodecException e) {
            log.error("获取视频帧出现异常", e);
            throw new VideoFrameException(VideoFrameExceptionTypes.GET_VIDEO_FRAME_FAILED);
        }
        return videoCover;
    }
}

四、编写Controller进行测试

@Slf4j
@RequestMapping("video")
@RestController
public class VideoController {

    @Resource
    private MinioService minioService;

    // 上传视频
    @PostMapping("/uploadVideo")
    public String uploadVideo(MultipartFile file) {
        String filename = minioService.upload(file);
        log.info("视频 {} 上传成功！", filename);
        MultipartFile firstFrame = VideoUtil.getFirstFrame(file);
        String firstFrameFilename = minioService.upload(firstFrame);
        log.info("封面 {} 上传成功！", firstFrameFilename);
        return filename;
    }
}

### 上传
POST http://127.0.0.1:8888/video/uploadVideo
Content-Type: multipart/form-data; boundary=WebAppBoundary

--WebAppBoundary
Content-Disposition: form-data; name="file"; filename="Grant_Gustin_share.mp4"

< /Users/wangfeihu/IdeaProjects/video-frame/src/main/resources/video/Grant_Gustin_share.mp4
--WebAppBoundary--

获取并上传视频首帧成功！

代码仓库: video-frame-demo