我怎样才能播放视频块的字节？ [英] How can i play a video in chunks of bytes?
本文介绍了我怎样才能播放视频块的字节？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我已经把它改成了一个字节数组，它使用下面的代码成功地播放了：
private String getDataSource ）抛出IOException {
InputStream stream = getAssets（）。open（famous.3gp）;
if（stream == null）
throw new RuntimeException（stream is null）;
文件temp = File.createTempFile（test，mp4）;
temp.deleteOnExit（）;
String tempPath = temp.getAbsolutePath（）;
int totalRead = 0;
int bytesToRead = 1 * 1024;
FileOutputStream out = new FileOutputStream（temp）;
字节buf [] =新字节[128];
int numread = 0;
do {
numread = stream.read（buf）;
totalRead + = numread;
if（numread< = 0）
break;
out.write（buf，0，numread）;
} while（totalRead< bytesToRead）;
尝试{
stream.close（）;
} catch（IOException ex）{
Log.e（mini，error：+ ex.getMessage（），ex）;
}
return tempPath;
$ b code
$ b 和in oncreate
videoView.setVideoPath（getDataSource（））;
但是我的要求是，我想玩数组中的前100个字节，完成后，按顺序播放下100个字节，然后再播放100个字节。
解决方案b
$ b
public class VideoDemo extends Activity {
private MediaController ctlr;
VideoView videoView = null;
上下文context = null;
long totalRead = 0;
int bytesToRead = 50 * 1024;
private int mPlayerPosition;
私有文件mBufferFile;
@Override
public void onCreate（Bundle icicle）{
super.onCreate（icicle）;
getWindow（）。setFormat（PixelFormat.TRANSLUCENT）;
setContentView（R.layout.main）;
videoView =（VideoView）findViewById（R.id.videoview）;
ctlr = new MediaController（this）;
ctlr.setMediaPlayer（videoView）;
videoView.setMediaController（ctlr）;
videoView.requestFocus（）;
new GetYoutubeFile（）。start（）;
}
private class GetYoutubeFile extends Thread {
private String mUrl;
private String mFile;
$ b $ public public GetYouTube（）{
}
@Override
public void run（）{
super.run ）;
尝试{
文件bufferingDir =新文件（
Environment.getExternalStorageDirectory（）
+/ YoutubeBuff）;
InputStream stream = getAssets（）。open（famous.3gp）;
if（stream == null）
throw new RuntimeException（stream is null）;
File temp = File.createTempFile（test，mp4）;
System.out.println（hi）;
temp.deleteOnExit（）;
String tempPath = temp.getAbsolutePath（）;
文件bufferFile = File.createTempFile（test，mp4）;
BufferedOutputStream bufferOS = new BufferedOutputStream（
FileOutputStream（bufferFile））;
InputStream is = getAssets（）。open（famous.3gp）;
BufferedInputStream bis = new BufferedInputStream（is，2048）;
byte [] buffer = new byte [16384];
int numRead;
boolean started = false; （（numRead = bis.read（buffer））！= -1）{
bufferOS.write（buffer，0，numRead）;
bufferOS.flush（）;
totalRead + = numRead;
if（totalRead> 120000&！！started）{
Log.e（Player，BufferHIT：StartPlay）;
setSourceAndStartPlay（bufferFile）;
started = true;
}
}
mBufferFile = bufferFile;
catch（MalformedURLException e）{
e.printStackTrace（）;
} catch（IOException e）{
e.printStackTrace（）;
$ b public void setSourceAndStartPlay（File bufferFile）{
try {
mPlayerPosition = videoView.getCurrentPosition （）;
videoView.setVideoPath（bufferFile.getAbsolutePath（））;
videoView.start（）;
$ b $ catch（IllegalArgumentException e）{
e.printStackTrace（）;
} catch（IllegalStateException e）{
e.printStackTrace（）;
} catch（Exception e）{
e.printStackTrace（）;
public void onCompletion（MediaPlayer mp）{
mPlayerPosition = mp.getCurrentPosition（）;
尝试{
mp.reset（）;
videoView.setVideoPath（new File（mnt / sdcard / YoutubeBuff /
+ mBufferFile）.getAbsolutePath（））;
mp.seekTo（mPlayerPosition）;
videoView.start（）;
} catch（IllegalArgumentException e）{
e.printStackTrace（）;
} catch（IllegalStateException e）{
e.printStackTrace（）;
} catch（Exception e）{
e.printStackTrace（）;
$ b $ / code $ / pre
videoview
I want to play a video in android,which i had saved in my assets folder.
I have changed it into a byte array and it is playing successfully,using the below code
private String getDataSource() throws IOException {
InputStream stream = getAssets().open("famous.3gp");
if (stream == null)
throw new RuntimeException("stream is null");
File temp = File.createTempFile("test", "mp4");
temp.deleteOnExit();
String tempPath = temp.getAbsolutePath();
int totalRead = 0;
int bytesToRead = 1 * 1024;
FileOutputStream out = new FileOutputStream(temp);
byte buf[] = new byte[128];
int numread = 0;
do {
numread = stream.read(buf);
totalRead += numread;
if (numread <= 0)
break;
out.write(buf, 0, numread);
} while (totalRead<bytesToRead);
try {
stream.close();
} catch (IOException ex) {
Log.e("mini", "error: " + ex.getMessage(), ex);
}
return tempPath;
// }
}
and in oncreate
videoView.setVideoPath(getDataSource());
But my requirement is, i want to play like, first 100 bytes from the array, and when it is finished ,play next 100 bytes in sequence and then another 100 like this.
解决方案 I got the solution
public class VideoDemo extends Activity {
private MediaController ctlr;
VideoView videoView = null;
Context context = null;
long totalRead = 0;
int bytesToRead = 50 * 1024;
private int mPlayerPosition;
private File mBufferFile;
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
getWindow().setFormat(PixelFormat.TRANSLUCENT);
setContentView(R.layout.main);
videoView = (VideoView) findViewById(R.id.videoview);
ctlr = new MediaController(this);
ctlr.setMediaPlayer(videoView);
videoView.setMediaController(ctlr);
videoView.requestFocus();
new GetYoutubeFile().start();
}
private class GetYoutubeFile extends Thread {
private String mUrl;
private String mFile;
public GetYoutubeFile() {
}
@Override
public void run() {
super.run();
try {
File bufferingDir = new File(
Environment.getExternalStorageDirectory()
+ "/YoutubeBuff");
InputStream stream = getAssets().open("famous.3gp");
if (stream == null)
throw new RuntimeException("stream is null");
File temp = File.createTempFile("test", "mp4");
System.out.println("hi");
temp.deleteOnExit();
String tempPath = temp.getAbsolutePath();
File bufferFile = File.createTempFile("test", "mp4");
BufferedOutputStream bufferOS = new BufferedOutputStream(
new FileOutputStream(bufferFile));
InputStream is = getAssets().open("famous.3gp");
BufferedInputStream bis = new BufferedInputStream(is, 2048);
byte[] buffer = new byte[16384];
int numRead;
boolean started = false;
while ((numRead = bis.read(buffer)) != -1) {
bufferOS.write(buffer, 0, numRead);
bufferOS.flush();
totalRead += numRead;
if (totalRead > 120000 && !started) {
Log.e("Player", "BufferHIT:StartPlay");
setSourceAndStartPlay(bufferFile);
started = true;
}
}
mBufferFile = bufferFile;
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}
public void setSourceAndStartPlay(File bufferFile) {
try {
mPlayerPosition=videoView.getCurrentPosition();
videoView.setVideoPath(bufferFile.getAbsolutePath());
videoView.start();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
public void onCompletion(MediaPlayer mp) {
mPlayerPosition = mp.getCurrentPosition();
try {
mp.reset();
videoView.setVideoPath(new File("mnt/sdcard/YoutubeBuff/"
+ mBufferFile).getAbsolutePath());
mp.seekTo(mPlayerPosition);
videoView.start();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
and in my xml i had only videoview
这篇关于我怎样才能播放视频块的字节？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
查看全文
