[英]Stream low latency RTSP video to android with ffmpeg
我正在嘗試使用KitKat將實時網絡攝像頭視頻從Ubuntu 12.04 PC傳輸到android設備。 到目前為止,我已經編寫了ffserver配置文件來接收ffm提要並通過rtsp協議對其進行廣播。 我可以使用ffplay在同一LAN中的另一台計算機上觀看流。
如何在Android設備上觀看視頻流? 當使用vlc傳輸網絡攝像頭圖像但不使用ffmpeg傳輸流時,以下代碼可以很好地工作:
public class MainActivity extends Activity implements MediaPlayer.OnPreparedListener,
SurfaceHolder.Callback {
final static String RTSP_URL = "rtsp://192.168.1.54:4424/test.sdp";
private MediaPlayer _mediaPlayer;
private SurfaceHolder _surfaceHolder;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Set up a full-screen black window.
requestWindowFeature(Window.FEATURE_NO_TITLE);
Window window = getWindow();
window.setFlags(
WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
window.setBackgroundDrawableResource(android.R.color.black);
getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
setContentView(R.layout.activity_main);
// Configure the view that renders live video.
SurfaceView videoView =
(SurfaceView) findViewById(R.id.videoView); //where R.id.videoView is a simple SurfaceView element in the layout xml file
_surfaceHolder = videoView.getHolder();
_surfaceHolder.addCallback(this);
_surfaceHolder.setFixedSize(320, 240);
}
@Override
public void surfaceCreated(SurfaceHolder surfaceHolder) {
_mediaPlayer = new MediaPlayer();
_mediaPlayer.setDisplay(_surfaceHolder);
Context context = getApplicationContext();
Uri source = Uri.parse(RTSP_URL);
try {
// Specify the IP camera's URL and auth headers.
_mediaPlayer.setDataSource(context, source);
// Begin the process of setting up a video stream.
_mediaPlayer.setOnPreparedListener(this);
_mediaPlayer.prepareAsync();
}
catch (Exception e) {}
}
@Override
public void onPrepared(MediaPlayer mediaPlayer) {
_mediaPlayer.start();
}
}
我的ffserver.config文件:
HTTPPort 8090
RTSPBindAddress 0.0.0.0
RTSPPort 4424
MaxBandwidth 10000
CustomLog -
<Feed feed1.ffm>
File /tmp/feed1.ffm
FileMaxSize 20M
ACL allow 127.0.0.1
</Feed>
<Stream test1.sdp>
Feed feed1.ffm
Format rtp
VideoCodec libx264
VideoSize 640x480
AVOptionVideo flags +global_header
AVOptionVideo me_range 16
AVOptionVideo qdiff 4
AVOptionVideo qmin 10
AVOptionVideo qmax 51
Noaudio
ACL allow localhost
ACL allow 192.168.0.0 192.168.255.255
</Stream>
我使用以下命令啟動流: ffmpeg -f v4l2 -i /dev/video0 -c:v libx264 -b:v 600k http://localhost:8090/feed1.ffm
此錯誤很可能是由VLC和FFmpeg的不同編碼參數引起的-VLC可以使用Android能夠支持的編碼參數,但是FFmpeg可以使用不受支持的編碼參數(最可能是AVC配置文件和級別)。 嘗試通過FFmpeg命令行選項和ffserver.config強制設置基線或主配置文件和YUV 4:2:0像素格式。
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