java對視訊進行轉碼
阿新 • • 發佈:2018-11-26
這裡有兩個方案:
1.利用國外一個大佬寫的jar包jave,裡面集成了ffmpeg,目前原始碼應該是更新到1.0.2,看了下原始碼應該發現,這個功能還是非常強大的,如果不需要轉碼,只需要獲取下圖片,視訊資訊,更是方便= = 。
JAVE(Java Audio Video Encoder),是一個包涵ffmpeg專案庫。開發這可以運用它去實現音訊(Audio)與視訊(Video)檔案的轉碼。例如你要把AVI格式檔案轉為MPEG檔案、WAV格式檔案轉為MP3格式檔案,同時你還能調整檔案大小與比例。JAVE相容和支援很多格式之間的轉碼……
轉碼的方法:
- public void encode(java.io.File source,
- java.io.File target,
- it.sauronsoftware.jave.EncodingAttributes attributes)
- throws java.lang.IllegalArgumentException,
- it.sauronsoftware.jave.InputFormatException,
- it.sauronsoftware.jave.EncoderException
- File source = new File("source.avi");
- File target = new File("target.mp4");
- AudioAttributes audio = new AudioAttributes();
- audio.setCodec("libmp3lame");
- audio.setBitRate(new Integer(56000));
- audio.setChannels(new Integer(1));
- audio.setSamplingRate(new Integer(22050));
- VideoAttributes video = new VideoAttributes();
- video.setCodec("libx264");
- EncodingAttributes attrs = new EncodingAttributes();
- attrs.setFormat("mp4"); //h264編碼
- attrs.setAudioAttributes(audio);
- attrs.setVideoAttributes(video);
- Encoder encoder = new Encoder();
- encoder.encode(source, target, attrs);
2.利用ffmpeg進行轉碼,有壞處:
- windows伺服器還比較簡單,直接下載ffmpeg可以直接進行轉碼了,但是linux伺服器的ffmpeg的安裝真的挺麻煩的。。我用了3個小時裝好。
- 需要呼叫java執行外部程式Runtime類或者ProcessBuilder去構建Process,據說呼叫多了,非常損耗效能。
Runtime runtime = Runtime.getRuntime(); Process p = runtime.exec(cmd);
- 1
- 2
Process p=new ProcessBuilder(cmd).start();
這裡有一點需要注意,runtime執行執行命令,processBuilder需要具體的檔案
runtime的cmd: String copy="cp -rf "+source+" "+target;
processBuilder的cmd: 這裡讀的是配置檔案中的
video.ffmpeg.linux.path=/usr/local/ffmpegRedHat/bin/./ffmpeg
video.ffmpeg.windows.path=D:\\project\\solr\\changToH264\\src\\ffmpeg.exe
開頭不太一樣。。
我目前直接用的ffmpeg,這裡粘一下我的原始碼,可以做一下參考
@Override
public boolean startChangeToH264(String inputPath, String outPath) throws Exception{
// ffmpeg能解析的格式:(asx,asf,mpg,wmv,3gp,mp4,mov,avi,flv等)
if (!checkfile(inputPath)) {
System.out.println(inputPath + " is not file");
throw new Exception("檔案不存在");
}
if(checkContentType(inputPath)!=0){
throw new Exception("檔案型別無法解析");
}
VideoFormatToH264 videoFormatToH264=new VideoFormatToH264(inputPath,outPath);
videoFormatToH264.run();
return true;
}
private static boolean checkfile(String path) {
File file = new File(path);
if (!file.isFile() || (!file.exists())) {
return false;
}
return true;
}
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;
}
// 對ffmpeg無法解析的檔案格式(wmv9,rm,rmvb等),
// 可以先用別的工具(mencoder)轉換為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;
}
/**
* Created by zhangluyao on 2018/6/12.
*/
public class VideoFormatToH264 {
private String filePath;
private String OutfilePath;
private List<String> command;
public VideoFormatToH264(String filePath,String OutfilePath){
this.OutfilePath=OutfilePath;
this.filePath=filePath;
}
public VideoFormatToH264(String filePath,String OutfilePath, List<String> command){
this.OutfilePath=OutfilePath;
this.filePath=filePath;
this.command=command;
}
public void run(){
ThreadPoolTaskExecutor threadPoolTaskExecutor=(ThreadPoolTaskExecutor)SpringUtil.getBean("threadPoolTaskExecutor");
ChangeVideoTask changeVideoTask=new ChangeVideoTask(this.getFilePath(),this.getOutfilePath());
threadPoolTaskExecutor.execute(changeVideoTask);
}
public void runCommand()throws Exception{
if(this.command!=null){
ThreadPoolTaskExecutor threadPoolTaskExecutor=(ThreadPoolTaskExecutor)SpringUtil.getBean("threadPoolTaskExecutor");
ChangeVideoTask changeVideoTask=new ChangeVideoTask(this.getFilePath(),this.getOutfilePath(),this.command);
threadPoolTaskExecutor.execute(changeVideoTask);
}else{
System.out.print("command為空");
throw new Exception("command為空");
}
}
private class ChangeVideoTask implements Runnable{
private String filePath;
private String outFilePath;
private List<String> command;
ChangeVideoTask(String path,String outFilePath){
this.outFilePath=outFilePath;
this.filePath=path;
}
ChangeVideoTask(String path,String outFilePath,List<String> command){
this.outFilePath=outFilePath;
this.filePath=path;
this.command=command;
}
@Override
public void run() {
try {
//命令是空時,執行視訊轉換成H264
if(CollectionUtils.isEmpty(command)){
command=new ArrayList<String>();
command.add(Const.getFFMPEGPath());
command.add("-i");
command.add(filePath);
command.add("-y");
command.add("-vcodec");
command.add("h264");
command.add("-preset");
command.add("ultrafast");
command.add("-profile:v");
command.add("baseline");
command.add("-acodec");
command.add("aac");
command.add("-strict");
command.add("experimental");
command.add("-s");
command.add("640*480");
command.add("-b");
command.add("568k");
command.add("-ab");
command.add("128k");
if(System.getProperty("os.name").toLowerCase().indexOf("windows")>-1){
command.add(outFilePath.substring(1));
}else{
command.add(outFilePath);
}
}
System.out.println("開始轉換");
Process videoProcess = new ProcessBuilder(command).redirectErrorStream(true).start();
new PrintStream(videoProcess.getErrorStream()).start();
new PrintStream(videoProcess.getInputStream()).start();
videoProcess.waitFor();//等待程序結束
CacheService cacheService=(CacheService) SpringUtil.getBean("cacheService");
String sourceName=filePath.substring(filePath.lastIndexOf("/")+1);
//轉換成功,去掉redis中的key
cacheService.remove(sourceName);
System.out.println("轉換成功");
FileUtils.delFile(filePath);
} catch (Exception e) {
e.printStackTrace();
}
}
}
private 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)
System.out.print((char)_ch);
else break;
}
}
catch (Exception e)
{
e.printStackTrace();
}
}
}
public String getFilePath() {
return filePath;
}
public void setFilePath(String filePath) {
this.filePath = filePath;
}
public String getOutfilePath() {
return OutfilePath;
}
public void setOutfilePath(String outfilePath) {
OutfilePath = outfilePath;
}
public List<String> getCommand() {
return command;
}
public void setCommand(List<String> command) {
this.command = command;
}
加點東西。
ffmpeg轉換成mp4檔案以後,視訊的元資料在末尾,jwplayer播放的時候需要全部緩衝結束才能開始播放,使用者體驗及其的不好~~ 更改後的程式碼先不貼上來了,就說下方法。
ffmpeg資料夾中,編譯前的資料夾,tools下面有一個qt-faststart.c
執行下make qt-faststart 會生成一個qt-faststart 命令
然後程式碼中對檔案 再執行一下 qt-faststart inputPath outPath 命令 就可以了
會生成一個新的檔案,這個檔案的元資料在開頭,可以直接播放的~~~