android - 如何录制流媒体视频？

Question

我可以在 SurfaceView 中通过 http 服务器连接播放流式视频。我通过添加菜单项 StartRecording 和 StopRecording 创建了用于录制视频的 ContextMenu。但是我可以通过调用 mediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);

来录制相机视频

这里我想将视频源设置为流式视频源。有没有可能这样做？

但我想在播放时录制流媒体视频。你能告诉我如何边播放边录音吗？

能否请您提供此问题的任何示例代码？

我的示例代码如下所示:

ma​​in.xml:

 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"             android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent">

<FrameLayout android:layout_width="fill_parent" android:layout_height="fill_parent" android:id="@+id/frameLayoutRoot">

    <SurfaceView android:id="@+id/surfaceViewFrame" android:layout_gravity="center" android:layout_height="wrap_content" android:layout_width="wrap_content"></SurfaceView>

    <LinearLayout android:layout_width="fill_parent" android:id="@+id/linearLayoutMediaController" android:layout_height="wrap_content" android:paddingBottom="5dp"
        android:paddingTop="5dp" android:layout_gravity="bottom" android:gravity="center_vertical" android:background="@color/media_controller_bg_color">

        <TextView android:layout_width="wrap_content" android:id="@+id/textViewPlayed" android:layout_marginLeft="5dp" android:layout_marginRight="5dp"
            android:textColor="@color/media_controller_text_color" android:textStyle="bold" android:text="0:00:00" android:padding="0dp" android:textSize="13sp" android:gravity="center"
            android:layout_height="wrap_content"></TextView>

        <SeekBar android:id="@+id/seekBarProgress" android:layout_weight="1" style="@style/MyCustomProgressStyle" android:layout_width="fill_parent"
            android:layout_height="wrap_content" android:progress="50"></SeekBar>
        <TextView android:layout_width="wrap_content" android:id="@+id/textViewLength" android:layout_marginLeft="5dp" android:layout_marginRight="5dp"
            android:textColor="@color/media_controller_text_color" android:textStyle="bold" android:text="0:00:00" android:textSize="13sp" android:padding="0dp" android:gravity="center"
            android:layout_height="wrap_content"></TextView>

    </LinearLayout>

    <ProgressBar style="?android:attr/progressBarStyleLarge" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center"
        android:id="@+id/progressBarWait"></ProgressBar>

    <ImageView android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/imageViewPauseIndicator" android:layout_gravity="center"
        android:src="@drawable/pause_button"></ImageView>
</FrameLayout>

MediaPlayerDemo.java:

public class MediaPlayerDemo_Video extends Activity implements
    OnBufferingUpdateListener, OnCompletionListener, OnPreparedListener,       OnClickListener, OnSeekCompleteListener,
    Callback, OnSeekBarChangeListener, AnimationListener {

private String path2 = "http://commonsware.com/misc/test2.3gp";
private String path = "";

    private static final String TAG = "MediaPlayerDemo";
private MediaRecorder mediaRecorder;
private MediaPlayer mMediaPlayer;
private SurfaceView surfaceViewFrame;
private SurfaceHolder surfaceHolder;
// private String path;
private Bundle extras;
private Animation hideMediaController;
private LinearLayout linearLayoutMediaController;
private SeekBar seekBarProgress;
private TextView textViewPlayed;
private TextView textViewLength;
private ProgressBar progressBarWait;
private ImageView imageViewPauseIndicator;
private Timer updateTimer;
AudioManager volume;
int keyCode = 0;
   KeyEvent keyEvent;
   private MediaRecorder mVideoRecorder = null;
   private Camera mCamera;

 @Override
public void onCreate(Bundle icicle) {
    super.onCreate(icicle);
    setContentView(R.layout.mediaplayer_2);

    linearLayoutMediaController = (LinearLayout)       findViewById(R.id.linearLayoutMediaController);
    linearLayoutMediaController.setVisibility(View.GONE);

        hideMediaController =       AnimationUtils.loadAnimation(MediaPlayerDemo_Video.this, R.anim.disapearing);
    hideMediaController.setAnimationListener(this);

    imageViewPauseIndicator = (ImageView) findViewById(R.id.imageViewPauseIndicator);
    imageViewPauseIndicator.setVisibility(View.GONE);

    textViewPlayed = (TextView) findViewById(R.id.textViewPlayed);
    textViewLength = (TextView) findViewById(R.id.textViewLength);

    surfaceViewFrame = (SurfaceView) findViewById(R.id.surfaceViewFrame);
    surfaceViewFrame.setOnClickListener(this);
    surfaceViewFrame.setClickable(false);

    seekBarProgress = (SeekBar) findViewById(R.id.seekBarProgress);
    seekBarProgress.setOnSeekBarChangeListener(this);
             //     seekBarProgress.setProgress(0);

    progressBarWait = (ProgressBar) findViewById(R.id.progressBarWait);
    volume = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
    int maxVolume = volume.getStreamMaxVolume(AudioManager.STREAM_MUSIC);
    int curVolume = volume.getStreamVolume(AudioManager.STREAM_MUSIC);
    seekBarProgress.setMax(maxVolume);
    seekBarProgress.setProgress(curVolume);

    surfaceHolder = surfaceViewFrame.getHolder();
    surfaceHolder.addCallback(this);
    surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);

    mMediaPlayer = new MediaPlayer();
    mMediaPlayer.setOnPreparedListener(this);
    mMediaPlayer.setOnCompletionListener(this);
    mMediaPlayer.setOnBufferingUpdateListener(this);
    mMediaPlayer.setOnSeekCompleteListener(this);
    mMediaPlayer.setScreenOnWhilePlaying(true);
    mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);

    if (mMediaPlayer != null) {
        if (!mMediaPlayer.isPlaying()) {
            imageViewPauseIndicator.setVisibility(View.VISIBLE);
        }
    }
 }

 @Override
public boolean onCreateOptionsMenu(Menu menu) {
    menu.add(0, 0, 0, "StartRecording");
    menu.add(0, 0, 0, "StopRecording");
    return super.onCreateOptionsMenu(menu);
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
    case 0:

        if (mediaRecorder == null)
            mediaRecorder = new MediaRecorder(); // Works well

        mediaRecorder.setPreviewDisplay(surfaceHolder.getSurface());

                             mediaRecorder.setVideoSource(MediaRecorder.VideoSource.DEFAULT);  
    mediaRecorder.setOutputFile("/sdcard/DCIM/Camera/StreamLive.3gp");
     mediaRecorder.setMaxDuration(-1);
     try {
            mediaRecorder.prepare();
        } catch (IllegalStateException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        break;

    case 1:
        mediaRecorder.stop();
        mediaRecorder.release();
        break;

    default:
        break;
    }
    return super.onOptionsItemSelected(item);
}   

      private void playVideo() {
         try {
                        mMediaPlayer.setDataSource(path);
                    } catch (IllegalArgumentException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    } catch (IllegalStateException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    } catch (IOException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }
                    mMediaPlayer.setDisplay(surfaceHolder);
                    try {
                        mMediaPlayer.prepare();
                    } catch (IllegalStateException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    } catch (IOException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }
                                    }

    public void surfaceChanged(SurfaceHolder surfaceholder, int i, int j, int k) {
    Log.d(TAG, "surfaceChanged called");

}

public void surfaceDestroyed(SurfaceHolder surfaceholder) {
    Log.d(TAG, "surfaceDestroyed called");
}

public void surfaceCreated(SurfaceHolder holder) {
    Log.d(TAG, "surfaceCreated called");
    playVideo();
}

public void onPrepared(MediaPlayer mediaplayer) {
    Log.i(TAG, "========== onPrepared ===========");
    int duration = mediaplayer.getDuration() / 1000; // duration in seconds
    seekBarProgress.setMax(duration);
    textViewLength.setText(Utils.durationInSecondsToString(duration));
    progressBarWait.setVisibility(View.GONE);


    // Get the dimensions of the video
            int videoWidth = mMediaPlayer.getVideoWidth();
            int videoHeight = mMediaPlayer.getVideoHeight();
            float videoProportion = (float) videoWidth / (float)       videoHeight;
            Log.i(TAG, "VIDEO SIZES: W: " + videoWidth + " H: " +        videoHeight + " PROP: " + videoProportion);

            // Get the width of the screen
            int screenWidth =            getWindowManager().getDefaultDisplay().getWidth();
            int screenHeight =            getWindowManager().getDefaultDisplay().getHeight();
            float screenProportion = (float) screenWidth /     (float)       screenHeight;
            Log.i(TAG, "VIDEO SIZES: W: " + screenWidth + " H: " +     screenHeight + " PROP: " + screenProportion);

            // Get the SurfaceView layout parameters
            android.view.ViewGroup.LayoutParams lp =        surfaceViewFrame.getLayoutParams();

            if (videoProportion > screenProportion) {
                lp.width = screenWidth;
                lp.height = (int) ((float) screenWidth /     videoProportion);
            } else {
                lp.width = (int) (videoProportion * (float)     screenHeight);
                lp.height = screenHeight;
            }

            // Commit the layout parameters
            surfaceViewFrame.setLayoutParams(lp);

            // Start video
            if (!mMediaPlayer.isPlaying()) {
                mMediaPlayer.start();
                updateMediaProgress();
                     linearLayoutMediaController.setVisibility(View.VISIBLE);
                hideMediaController();

            }
            surfaceViewFrame.setClickable(true);
}

public void onCompletion(MediaPlayer mp) {
    Log.d(TAG, "onCompletion called");
    mp.stop();
    if (updateTimer != null) {
        updateTimer.cancel();
    }
     //     mp.seekTo(0);
     //     finish();
}

public void onBufferingUpdate(MediaPlayer mp, int percent) {
    Log.d(TAG, "onBufferingUpdate percent:" + percent);
    int progress = (int) ((float) mp.getDuration() * ((float) percent /        (float) 100));
    seekBarProgress.setSecondaryProgress(progress / 1000);

   } 
}

Answer 1

问题就像我在 android 上遇到的录制流媒体音频时遇到的问题。您可以尝试编写视频 header (取决于您的视频格式)以在缓冲区更新时流式传输和附加数据..将流刷新到您想要的任何地方..查看 RehearsalAudioRecorder 的工作原理。