Java使用ffmpeg将视频转为Mp4格式

布满荆棘的人生 2024-04-07 13:37 103阅读 0赞

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;
    	}