Android 直播视频 - 音频不工作

Question

目标:

制作一个 Android 应用程序以将实时视频/音频流式传输到 PC。这些文件不应保存在任何地方。由于发现了库 libstreamer 和 vlcj，Atm 在两端(android/PC)都在 java 中工作。

总体:

我可以播放视频，但无法在 PC 上播放音频。我尝试了不同的音频编码。尝试使用 AAC 时 - VLC 会报错说这是未知格式。使用 AMRNB 格式不会出现同样的错误，所以必须通过某些音频，或者我对此有误吗？我尝试了来自 G33Ktricks 的几个不同的 RTPS 测试链接。没能找到一个不能与 PC vlcj 一起工作的。PC连接android后启动的logcat pastebin

问题:

要使音频正常工作，我缺少什么？如果无法回答，我应该看看是 Android 端还是 PC 端，以便最幸运地找到缺失的行？

安卓:

我正在使用 libstreamer 和 Spydroid 中的示例来实现此功能。我开始使用的代码可以在 libstreamer 包示例 1 中找到:

public class MainActivity extends Activity {
private final static String TAG = "MainActivity";
private SurfaceView mSurfaceView;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
    getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);

    mSurfaceView = (SurfaceView) findViewById(R.id.surface);

    // Sets the port of the RTSP server to 1234
    Editor editor = PreferenceManager.getDefaultSharedPreferences(this).edit();
    editor.putString(RtspServer.KEY_PORT, String.valueOf(1234));
    editor.commit();

    // Configures the SessionBuilder
    SessionBuilder builder = SessionBuilder.getInstance();

    builder.setSurfaceView(mSurfaceView);
    builder.setPreviewOrientation(90);
    builder.setContext(getApplicationContext());
    builder.setAudioEncoder(SessionBuilder.AUDIO_AMRNB);
    builder.setAudioQuality(new AudioQuality(8000,16000));
    builder.setVideoEncoder(SessionBuilder.VIDEO_H264);
    builder.setVideoQuality(new VideoQuality(480,320,10,500000));
    builder.setCamera(CameraInfo.CAMERA_FACING_FRONT);
    builder.build();

    // Starts the RTSP server
    this.startService(new Intent(this,RtspServer.class));
}
}

电脑

使用 VLCJ 进行流式传输。我开始使用的代码可以在 vlcj-master 官方包中找到 - 示例 2:

public class Example2
{
private final JFrame                        frame;
private final EmbeddedMediaPlayerComponent  mediaPlayerComponent;

public static void main( String[ ] args )
{
    new NativeDiscovery().discover();

    final String mrl = "rtsp://10.251.1.107:1234/trackID=0";

    SwingUtilities.invokeLater( new Runnable() {
        @Override
        public void run( )
        {
            new Example2().start( mrl );
        }
    } );
}

public Example2( )
{
    mediaPlayerComponent = new EmbeddedMediaPlayerComponent();
    frame = new JFrame( "vlcj quickstart" );
    frame.setLocation( 0, 0 );
    frame.setSize( 1400, 800 );
    frame.setContentPane( mediaPlayerComponent );
    frame.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
    frame.setVisible( true );
}

private void start( String mrl )
{
    String[] options = {"--ffmpeg-threads=1"};

    EmbeddedMediaPlayer p = mediaPlayerComponent.getMediaPlayer();
    p.playMedia( mrl, options );
}
}

SDP

从安卓端:

RTSP/1.0 200 OK
Server: MajorKernelPanic RTSP Server
Cseq: 3
Content-Length: 366
Content-Base: 10.251.1.107:1234/
Content-Type: application/sdp
v=0
o=- 0 0 IN IP4 10.251.1.107
s=Unnamed
i=N/A
c=IN IP4 10.251.1.125
t=0 0
a=recvonly
m=audio 5004 RTP/AVP 96
a=rtpmap:96 AMR/8000
a=fmtp:96 octet-align=1;
a=control:trackID=0
m=video 5006 RTP/AVP 96
a=rtpmap:96 H264/90000
a=fmtp:96 packetization-mode=1;profile-level-id=428015;sprop-parameter-sets=Z0KAFdoHgpoBtChNQA==,aM4G4g==;
a=control:trackID=1
SETUP 10.251.1.107:1234/trackID=0
Requested audio with 16kbps at 8kHz

Answer 1

我找到了原因......

以下代码来自libstreaming net.majorkernelpanic.streaming.SessionBuilder.java

if (session.getVideoTrack()!=null) {
        VideoStream video = session.getVideoTrack();
        video.setFlashState(mFlash);
        video.setVideoQuality(mVideoQuality);
        video.setSurfaceView(mSurfaceView);
        video.setPreviewOrientation(mOrientation);
        video.setDestinationPorts(5006);
    }

    if (session.getAudioTrack()!=null) {
        AudioStream audio = session.getAudioTrack();
        audio.setAudioQuality(mAudioQuality);
        audio.setDestinationPorts(5004); //Change this port to anything else fx 5010 worked for me
    }