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如何在java中使用ffmpeg對(duì)視頻進(jìn)行轉(zhuǎn)換?很多新手對(duì)此不是很清楚,為了幫助大家解決這個(gè)難題,下面小編將為大家詳細(xì)講解,有這方面需求的人可以來(lái)學(xué)習(xí)下,希望你能有所收獲。
Java主要應(yīng)用于:1. web開(kāi)發(fā);2. Android開(kāi)發(fā);3. 客戶(hù)端開(kāi)發(fā);4. 網(wǎng)頁(yè)開(kāi)發(fā);5. 企業(yè)級(jí)應(yīng)用開(kāi)發(fā);6. Java大數(shù)據(jù)開(kāi)發(fā);7.游戲開(kāi)發(fā)等。
步驟:
1.研究java如何調(diào)用外部程序
2.研究ffmpeg轉(zhuǎn)換視頻格式的命令
3.利用xuggle獲取ffmpeg解析的ts流的時(shí)長(zhǎng)、分辨率以及文件大小。
下面直接上代碼:
1.ffmpeg轉(zhuǎn)換實(shí)現(xiàn)
package vedio.ffmpeg; import java.io.File; import java.util.ArrayList; import java.util.List; public class FfmpegUtil { public static Boolean ffmpeg(StringffmpegPath, String inputPath, String outputPath) throwsFFmpegException{ if (!checkfile(inputPath)) { throw newFFmpegException("文件格式不合法"); } int type =checkContentType(inputPath); List command = getFfmpegCommand(type,ffmpegPath, inputPath, outputPath); if (null != command &&command.size() > 0) { return process(command); } return false; } private static int checkContentType(StringinputPath) { 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 1; } else if (type.equals("mpg")){ return 1; } else if (type.equals("wmv")){ return 1; } else if (type.equals("3gp")){ return 1; } else if (type.equals("mov")){ return 1; } else if (type.equals("mp4")){ return 1; } else if(type.equals("mkv")){ return 1; }else if (type.equals("asf")){ return 0; } else if (type.equals("flv")){ return 0; }else if (type.equals("rm")){ return 0; } else if (type.equals("rmvb")){ return 1; } return 9; } private static boolean checkfile(Stringpath) { File file = new File(path); if (!file.isFile()) { return false; } return true; } private static boolean process(Listcommand) throws FFmpegException{ try { if (null == command || command.size() ==0) return false; Process videoProcess = newProcessBuilder(command).redirectErrorStream(true).start(); newPrintStream(videoProcess.getErrorStream()).start(); newPrintStream(videoProcess.getInputStream()).start(); int exitcode =videoProcess.waitFor(); if (exitcode == 1) { return false; } return true; } catch (Exception e) { throw new FFmpegException("file uploadfailed",e); } } private static List getFfmpegCommand(inttype, String ffmpegPath, String oldfilepath, String outputPath)throws FFmpegException { List command = newArrayList(); if (type == 1) { command.add(ffmpegPath +"\\ffmpeg"); command.add("-i"); command.add(oldfilepath); command.add("-c:v"); command.add("libx264"); command.add("-x264opts"); command.add("force-cfr=1"); command.add("-c:a"); command.add("mp2"); command.add("-b:a"); command.add("256k"); command.add("-vsync"); command.add("cfr"); command.add("-f"); command.add("mpegts"); command.add(outputPath); } else if(type==0){ command.add(ffmpegPath +"\\ffmpeg"); command.add("-i"); command.add(oldfilepath); command.add("-c:v"); command.add("libx264"); command.add("-x264opts"); command.add("force-cfr=1"); command.add("-vsync"); command.add("cfr"); command.add("-vf"); command.add("idet,yadif=deint=interlaced"); command.add("-filter_complex"); command.add("aresample=async=1000"); command.add("-c:a"); command.add("libmp3lame"); command.add("-b:a"); command.add("192k"); command.add("-pix_fmt"); command.add("yuv420p"); command.add("-f"); command.add("mpegts"); command.add(outputPath); }else{ throw newFFmpegException("不支持當(dāng)前上傳的文件格式"); } return command; } } class PrintStream extends Thread{ java.io.InputStream __is =null; public PrintStream(java.io.InputStream is){ __is = is; } public void run() { try { while (this != null) { int _ch = __is.read(); if (_ch == -1) { break; } else { System.out.print((char) _ch); } } } catch (Exception e) { e.printStackTrace(); } } }
2.調(diào)用測(cè)試類(lèi)
package vedio.ffmpeg; public class ConvertVedio { public static void convertVedio(StringinputPath){ String ffmpegPath =getFfmpegPath(); String outputPath =getOutputPath(inputPath); try { FfmpegUtil.ffmpeg(ffmpegPath, inputPath,outputPath); } catch (FFmpegException e) { e.printStackTrace(); } } private static String getFfmpegPath(){ return "ffmpeg"; } private static String getOutputPath(StringinputPath) { return inputPath.substring(0,inputPath.lastIndexOf(".")).toLowerCase() + ".ts"; } }
3.自定義的異常類(lèi)
package vedio.ffmpeg; public class FFmpegException extendsException { private static final long serialVersionUID= 1L; public FFmpegException() { super(); } public FFmpegException(String message){ super(message); } public FFmpegException(Throwable cause){ super(cause); } public FFmpegException(String message,Throwable cause) { super(message, cause); } }
4.獲取ts流的時(shí)長(zhǎng)、大小以及分辨率(用到了Xuggle,需要下載對(duì)應(yīng)jar包)
importcom.xuggle.xuggler.ICodec; importcom.xuggle.xuggler.IContainer; importcom.xuggle.xuggler.IStream; importcom.xuggle.xuggler.IStreamCoder; */ public static void getVedioInfo(String filename){ // first we create a Xuggler containerobject IContainer container =IContainer.make(); // we attempt to open up thecontainer int result = container.open(filename,IContainer.Type.READ, null); // check if the operation wassuccessful if (result<0) return; // query how many streams the call to openfound int numStreams =container.getNumStreams(); // query for the total duration long duration =container.getDuration(); // query for the file size long fileSize =container.getFileSize(); long secondDuration =duration/1000000; System.out.println("時(shí)長(zhǎng):"+secondDuration+"秒"); System.out.println("文件大小:"+fileSize+"M"); for (int i=0; i IStreamstream = container.getStream(i); IStreamCoder coder = stream.getStreamCoder(); if(coder.getCodecType() == ICodec.Type.CODEC_TYPE_VIDEO){ System.out.println("視頻寬度:"+coder.getWidth()); System.out.println("視頻高度:"+coder.getHeight()); } } }
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