我有一個應用程序從另一個作爲服務器的應用程序接收視頻文件。當應用程序保存在套接字上接收到的文件時,視頻流開始播放文件(正在建設中)。在代碼示例中,按下btnStream後,我按下btnPlay並且App成功運行。但是,如果播放速率大於下載速度,則會發生錯誤。我想避免這種情況。所以我需要在視頻播放器上有一個監聽器,當它預測會發生這個錯誤時會暫停視頻視頻。我知道一個解決方案,如果我知道視頻大小,我可以計數收到的字節數,並監視已經緩衝了多少秒,並查看視頻視圖是否應該暫停。但是,是否有可能在不知道視頻文件大小的情況下做到這一點?或者有兩個線程相互依賴?謝謝。VideoView在通過套接字接收文件時播放文件
注意:使用的VideoView是一個可以播放FileDescriptor的自定義視頻。
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);
}
}
}