我有一个应用程序从另一个作为服务器的应用程序接收视频文件。当应用程序保存在套接字上接收到的文件时,视频流开始播放文件(正在建设中)。在代码示例中,按下btnStream后,我按下btnPlay并且App成功运行。但是,如果播放速率大于下载速度,则会发生错误。我想避免这种情况。所以我需要在视频播放器上有一个监听器,当它预测会发生这个错误时会暂停视频视频。我知道一个解决方案,如果我知道视频大小,我可以计数收到的字节数,并监视已经缓冲了多少秒,并查看视频视图是否应该暂停。但是,是否有可能在不知道视频文件大小的情况下做到这一点?或者有两个线程相互依赖?谢谢。VideoView在通过套接字接收文件时播放文件
注意:使用的VideoView是一个可以播放FileDescriptor的自定义视频。
btnStream.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
String s = etURL.getText().toString();
String ip = "10.0.0.24";
int port = 7878;
mct= new VideoDownloadTask(ip,port);
mct.execute();
}});
final MediaController mediaController = new MediaController(this);
mediaController.setAnchorView(mVideoView);
Button btnPlay = (Button) findViewById(R.id.button2);
btnPlay.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
try {
mVideoView.setVideoFD((new FileInputStream(new File("/sdcard/tempVideo.mp4")).getFD()));
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
mVideoView.seekTo(0);
mVideoView.start();
}
});
}
public class VideoDownloadTask extends AsyncTask<Void, Void, Void> {
String dstAddress;
int dstPort;
String response = "";
Socket socket=null;
VideoDownloadTask(String addr, int port){
dstAddress = addr;
dstPort = port;
}
@Override
protected Void doInBackground(Void... arg0) {
try {
socket = new Socket(InetAddress.getByName(dstAddress), dstPort);
} catch (UnknownHostException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
try {
if(socket!=null)socket.close();
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
}
File f = new File("/sdcard/tempVideo.mp4");
try {
f.createNewFile();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
DataInputStream in=null;
try {
in = new DataInputStream (socket.getInputStream());
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
FileOutputStream videoFile = null;
try {
videoFile = new FileOutputStream(f);
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
int len;
byte buffer[] = new byte[8192];
try {
while((len = in.read(buffer)) != -1) {
videoFile.write(buffer, 0, len);
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
videoFile.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
socket.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(Void result) {
Toast.makeText(getApplicationContext(), "Done Downloading File",
Toast.LENGTH_LONG).show();
super.onPostExecute(result);
}
}
}