Java使用ffmpeg将视频转为Mp4格式-蒲公英云

Java使用ffmpeg将视频转为Mp4格式

不支持Dav格式的视频！！！

我测试过 1分钟的DAV视频转成 MP4就十几秒不知道问题出在哪里。

/**
     *
     * @param inputPath 视频的地址
     * @param outputPath  视频转完格式存放地址
     * @param newFileName 新生成的视频名称
     */
    public boolean davToMP4Video(String inputPath,String outputPath,String newFileName){
        //ffmpeg软件地址
        String ffmpegPath = LibtraryUtil.getffmpeg();
        if (!checkfile(inputPath)) {
            logger.error(inputPath + " is not file");
            return false;
        }
        String video = "";
        String imgUrl = "";
        String oldVideoUrl = "";
        if (StringUtil.isNotBlank(inputPath)) {
            imgUrl = inputPath;
            video = imgUrl.replaceAll("\\\\","/");
            oldVideoUrl = video.substring(0,video.lastIndexOf("/")+1);
            video = video.substring(video.lastIndexOf("/")+1);
        }else {
            logger.error("inputPath is null ：" + inputPath);
            return false;
        }
        String oldFileName = video;
//        int type = checkContentType(inputPath);
        boolean status = false;
        logger.info("直接转成mp4格式");
        status = processMp4(inputPath,inputPath,ffmpegPath,outputPath,newFileName);// 直接转成mp4格式
        if (status) {
            File folder = new File(oldVideoUrl);
            File[] files = folder.listFiles();
            for (File file : files) {
                if (file.getName().equals(oldFileName)){
                    file.delete();
                }
            }
            logger.info("视频转MP4成功!");
            return true;
        }else {
            logger.error("视频转换失败，重试！");
            status = processMp4(inputPath,inputPath,ffmpegPath,outputPath,newFileName);// 直接转成mp4格式
            if (status) {
                File folder = new File(oldVideoUrl);
                File[] files = folder.listFiles();
                for (File file : files) {
                    if (file.getName().equals(oldFileName)){
                        file.delete();
                    }
                }
                logger.info("视频转MP4成功!");
                return true;
            }
            return false;
        }
    }
private static boolean checkfile(String path) {
        File file = new File(path);
        if (!file.isFile()) {
            logger.error(path+"不是文件夹！");
            return false;
        }
        return true;
    }
private static boolean processMp4(String inputPath,String oldfilepath,String ffmpegPath,String outputPath,String fileName) {
        if (!checkfile(inputPath)) {
            logger.error(oldfilepath + " is not file");
            return false;
        }
        List<String> command = new ArrayList<String>();
        command.add(ffmpegPath + "ffmpeg");
        command.add("-i");
        command.add(oldfilepath);
        command.add("-c:v");
        command.add("libx264");
        command.add("-mbd");
        command.add("0");
        command.add("-c:a");
        command.add("aac");
        command.add("-strict");
        command.add("-2");
        command.add("-pix_fmt");
        command.add("yuv420p");
        command.add("-movflags");
        command.add("faststart");
        command.add(outputPath +fileName+ ".mp4");
        try {
            // 方案1
            //        Process videoProcess = Runtime.getRuntime().exec(ffmpegPath + "ffmpeg -i " + oldfilepath
            //                + " -ab 56 -ar 22050 -qscale 8 -r 15 -s 600x500 "
            //                + outputPath + "a.flv");
            // 方案2
            Process videoProcess = new ProcessBuilder(command).redirectErrorStream(true).start();
            new PrintStream(videoProcess.getErrorStream()).start();
            new PrintStream(videoProcess.getInputStream()).start();
            videoProcess.waitFor();
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }
}
class PrintStream extends Thread {
    java.io.InputStream __is = null;
    public PrintStream(java.io.InputStream is) {
        __is = is;
    }
    @Override
    public void run() {
        try {
            while (this != null) {
                int _ch = __is.read();
                if (_ch != -1) {
//                    System.out.print((char) _ch);
                } else {
                    break;
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

下面这个方法我没用到担心你们也有需要我就贴出来吧

private static int checkContentType(String inputPath) {
        String type = inputPath.substring(inputPath.lastIndexOf(".") + 1, inputPath.length())
                .toLowerCase();
        // ffmpeg能解析的格式：（asx，asf，mpg，wmv，3gp，mp4，mov，avi，flv等）
        if (type.equals("avi")) {
            return 0;
        } else if (type.equals("mpg")) {
            return 0;
        } else if (type.equals("wmv")) {
            return 0;
        } else if (type.equals("3gp")) {
            return 0;
        } else if (type.equals("mov")) {
            return 0;
        } else if (type.equals("mp4")) {
            return 0;
        } else if (type.equals("asf")) {
            return 0;
        } else if (type.equals("asx")) {
            return 0;
        } else if (type.equals("flv")) {
            return 0;
        }
        // 对ffmpeg无法解析的文件格式(wmv9，rm，rmvb等),
        // 可以先用别的工具（mencoder）转换为avi(ffmpeg能解析的)格式.
        else if (type.equals("wmv9")) {
            return 1;
        } else if (type.equals("rm")) {
            return 1;
        } else if (type.equals("rmvb")) {
            return 1;
        }
        return 9;
    }