关于java:javaCV-视频工具截取视频缩略图获取视频属性

@TOC
@Slf4jpublic class VideoUtils {    private static final String IMAGEMAT = "png";    private static final String ROTATE = "rotate";    /**     * 默认截取视频的两头帧为封面     */    public static final int MOD = 2;    /**     * 视频缩略图后缀     */    private static final String VIDEO_THUMBNAIL_SUF = "th.png";    /**     * 视频缩略图前缀     */    private static final String VIDEO_THUMBNAIL_PRE = "video/thumbnail/";    private static final String SYMBOL = ".";    /**     * 获取视频缩略图     * @param filePath：视频门路     * @param mod：视频长度/mod获取第几帧     * @throws Exception     */    public static String randomGrabberFFmpegImage(String filePath, int mod) {        String targetFilePath = "";        try{            FFmpegFrameGrabber ff = FFmpegFrameGrabber.createDefault(filePath);            ff.start();            //图片地位是否正确            String rotate = ff.getVideoMetadata(ROTATE);            //获取帧数            int ffLength = ff.getLengthInFrames();            Frame f;            int i = 0;            //设置截取帧数            int index = ffLength / mod;            while (i < ffLength) {                f = ff.grabImage();                if(i == index){                    if (null != rotate && rotate.length() > 1) {                        OpenCVFrameConverter.ToIplImage converter = new OpenCVFrameConverter.ToIplImage();                        IplImage src = converter.convert(f);                        f = converter.convert(rotate(src, Integer.parseInt(rotate)));                    }                    targetFilePath = getImagePath(filePath, i);                    doExecuteFrame(f, targetFilePath);                    break;                }                i++;            }            ff.stop();        }catch (Exception e){            log.error("获取视频缩略图异样：" + e.getMessage());        }        return targetFilePath;    }    /**     * 随机生成生成缩略图寄存门路     * @param filePath：视频门路     * @param index：第几帧     * @return：缩略图的寄存门路     */    private static String getImagePath(String filePath, int index){        String fileName = FileUtils.getName(filePath);        //去后缀        fileName = fileName.substring(0, fileName.indexOf(SYMBOL));        return TencentCosConfig.baseUrl + VIDEO_THUMBNAIL_PRE + DateUtils.datePath() + "/" + fileName + "_" + index +  VIDEO_THUMBNAIL_SUF;    }    /**     * 旋转图片     * @param src     * @param angle     * @return     */    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;    }    /**     * 截取缩略图     * @param f     * @param targerFilePath:封面图片     */    public static void doExecuteFrame(Frame f, String targerFilePath) {        COSClient cosClient = TencentCosUtils.initCosClient();        if (null == f || null == f.image) {            return;        }        Java2DFrameConverter converter = new Java2DFrameConverter();        BufferedImage bi = converter.getBufferedImage(f);        ByteArrayOutputStream out = new ByteArrayOutputStream();        try {            ImageIO.write(bi, IMAGEMAT, out);            // 获取文件流            InputStream bufferedImage = new ByteArrayInputStream(out.toByteArray());            int length = out.size();            ObjectMetadata objectMetadata = new ObjectMetadata();            // 从输出流上传必须制订content length, 否则http客户端可能会缓存所有数据，存在内存OOM的状况            objectMetadata.setContentLength(length);            // 默认下载时依据cos门路key的后缀返回响应的contenttype, 上传时设置contenttype会笼罩默认值            PutObjectRequest putObjectRequest = new PutObjectRequest(TencentCosConfig.bucket, targerFilePath, bufferedImage, objectMetadata);            PutObjectResult putObjectResult = cosClient.putObject(putObjectRequest);            log.info("腾讯COS上传视频缩略图胜利：{}", putObjectResult.getETag());            //敞开输入输出流            bufferedImage.close();            out.close();        } catch (IOException e) {            e.printStackTrace();        } finally {            cosClient.shutdown();        }    }    /**     * 依据视频长度随机生成随机数汇合     * @param baseNum:根底数字，此处为视频长度     * @param length：随机数汇合长度     * @return:随机数汇合     */    public static List<Integer> random(int baseNum, int length) {        List<Integer> list = new ArrayList<Integer>(length);        while (list.size() < length) {            Integer next = (int) (Math.random() * baseNum);            if (list.contains(next)) {                continue;            }            list.add(next);        }        Collections.sort(list);        return list;    }    /**     * 获取视频时长 单位/秒     * @param video     * @return     */    public static long getVideoDuration(File video) {        long duration = 0L;        FFmpegFrameGrabber ff = new FFmpegFrameGrabber(video);        try {            ff.start();            duration = ff.getLengthInTime() / (1000 * 1000);            ff.stop();        } catch (FrameGrabber.Exception e) {            e.printStackTrace();        }        return duration;    }    /**     * 获取视频时长 单位/秒     * @param inputStream 输出流     * @return     */    public static long getVideoDuration(InputStream inputStream) {        long duration = 0L;        FFmpegFrameGrabber ff = new FFmpegFrameGrabber(inputStream);        try {            ff.start();            duration = ff.getLengthInTime() / (1000 * 1000);            ff.stop();        } catch (FrameGrabber.Exception e) {            e.printStackTrace();        }        return duration;    }    /**     * 转换视频文件为mp4     * @param file     * @return     */    public static String convertToMp4(File file) {        FFmpegFrameGrabber frameGrabber = new FFmpegFrameGrabber(file);        String fileName = null;        Frame captured_frame = null;        FFmpegFrameRecorder recorder = null;        try {            frameGrabber.start();            fileName = file.getAbsolutePath() + "__.mp4";            recorder = new FFmpegFrameRecorder(fileName, frameGrabber.getImageWidth(), frameGrabber.getImageHeight(), frameGrabber.getAudioChannels());            recorder.setVideoCodec(avcodec.AV_CODEC_ID_H264); //avcodec.AV_CODEC_ID_H264  //AV_CODEC_ID_MPEG4            recorder.setFormat("mp4");            recorder.setFrameRate(frameGrabber.getFrameRate());            //recorder.setSampleFormat(frameGrabber.getSampleFormat()); //            recorder.setSampleRate(frameGrabber.getSampleRate());            recorder.setAudioChannels(frameGrabber.getAudioChannels());            recorder.setFrameRate(frameGrabber.getFrameRate());            recorder.start();            while ((captured_frame = frameGrabber.grabFrame()) != null) {                try {                    recorder.setTimestamp(frameGrabber.getTimestamp());                    recorder.record(captured_frame);                } catch (FrameRecorder.Exception e) {                    e.printStackTrace();                }            }            recorder.stop();            recorder.release();            frameGrabber.stop();        } catch (Exception | FrameRecorder.Exception e) {            e.printStackTrace();        }        return fileName;    }}
关于java:javaCV-视频工具截取视频缩略图获取视频属性

目录

简介

依赖引入

实现
