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• Generate MPEG-DASH segments when requested [closed]

  16 septembre 2024, par John Smith

  Up front disclaimer : this question is almost identical to the one here : Generate single MPEG-Dash segment with ffmpeg but it seems that ffmpeg has updated over time and now the answer provided by Coumeu is no longer accurate.

  


  Using ffmpeg, I am attempting to "lazily create" the segments needed for MPEG DASH playback. I have a static manifest (MPD) which includes SegmentTemplates for 1 video and 1 audio stream.

  


  Only when the endpoints provided in the SegmentTemplate for init or media segments is hit it will generate this segment. In other words, nothing is processed up front.

  


  I am creating the init segment using the following movflags :

  


  +frag_keyframe+faststart+skip_trailer 


  


  I am creating the media segment using the following movflags

  


  +frag_keyframe+default_base_moof+delay_moov+skip_trailer+dash+global_sidx


  


  and the following additional commands any segment type :

  


  -map_metadata -1 -copyts -start_at_zero -map 0:${streamIndex}


  


  This results in playable video with the correct duration, but it seems to be switching fragments quite fast. On average one fragment per second. When I omit the delay_moov flag, the video also starts glitching, like it's stepping over I-Frames.

  


  My observations when I look at the boxes :

  


  

  • earliest_presentation_time (sidx box) is 0 for all segments

  


  • base_media_decode_time (moof->traf->tfdt box) is 0 for all segments

  


  


  I'm looking for either the correct command line to create segments on the fly, or hacky ways to get it done right if ffmpeg doesn't provide it out of the box. Even information about what to look for would be helpful, because my knowledge about mp4 and MPEG-DASH is running out.

  


• Serving live stream by using ffmpeg via rtmp protocol

  28 janvier 2019, par Yusufu

  I have been trying to serve my rtmp stream to web, struggling with videojs
  I am able to serve my static video or live stream from android screen by using ffmpeg via this command :

  ffmpeg -i video7.mp4 -c:v libx264 -g 25 -preset fast -b:v 4096k -c:a libfdk_aac -ar 44100 -f flv rtmp://127.0.0.1/media_server/video.flv

  So can connect it via ffplay. This part works like a charm.

  ffplay  rtmp://127.0.0.1/media_server/video.flv

  But couldnt watch in web. My html file here. Copied from videojs offical example

  1. question : Being able to watch via ffplay on rtmp means my nginx rtmp module works well ?

  2. I have been serving httml via http-server and rtmp on rtmp ://127.0.0.1 without port caused problem ?

  3. Any other videoplayer advice ? I have already tried hls it works but in my case creating m3u8 manifest file not desired because I am streaming live video from mobile screen record so creating new ts files nut not updated m3u8 file not for me I guess ?

  4. What else I can try as a protocol ? instead of rtmp

  I can share about my screenrecord and ffmpeg commands to help me or you. Thanks

• Youtube Watch Me Android application closing unexpectedly

  18 septembre 2015, par Kichu

  I create android application from https://github.com/youtube/yt-watchme.

  When I try to create the event using the "CREATE LIVE EVENT" button.It throws some following error. I think it’s happening due to the camera permission issue.

  ERROR :

  09-17 11:43:53.582  32383-32383/com.google.android.apps.watchme E/AndroidRuntime﹕ FATAL EXCEPTION: main
  
      Process: com.google.android.apps.watchme, PID: 32383
  
      java.lang.NoSuchMethodError: com.google.android.apps.watchme.StreamerActivity.checkSelfPermission
  
              at com.google.android.apps.watchme.StreamerActivity.startStreaming(StreamerActivity.java:174)
  
              at com.google.android.apps.watchme.StreamerActivity.access$200(StreamerActivity.java:46)
  
              at com.google.android.apps.watchme.StreamerActivity$1.onServiceConnected(StreamerActivity.java:63)
  
              at android.app.LoadedApk$ServiceDispatcher.doConnected(LoadedApk.java:1110)
  
              at android.app.LoadedApk$ServiceDispatcher$RunConnection.run(LoadedApk.java:1127)
  
              at android.os.Handler.handleCallback(Handler.java:733)
  
              at android.os.Handler.dispatchMessage(Handler.java:95)
  
              at android.os.Looper.loop(Looper.java:136)
  
              at android.app.ActivityThread.main(ActivityThread.java:5097)
  
              at java.lang.reflect.Method.invokeNative(Native Method)
  
              at java.lang.reflect.Method.invoke(Method.java:515)
  
              at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
  
              at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
  
              at dalvik.system.NativeStart.main(Native Method)

  Any one please suggest . How can I solve this issue.

  Thanks In Advance

  Code Update :

  Manifest file XML

  <manifest package="com.google.android.apps.watchme">
  
  
  
  
  
      
  
      
  
      
  
      
  
      
  
      
  
      
  
      
  
      
  
  
  
      
  
      
  
  
  
      <application>
  
          <activity>
  
              
  
                  <action></action>
  
  
  
                  <category></category>
  
              
  
          </activity>
  
          <activity></activity>
  
  
  
          <service></service>
  
      </application>
  
      
  
  </manifest>

  Stream Activity File

  /*
  
   * Copyright (c) 2014 Google Inc.
  
   *
  
   * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
  
   * in compliance with the License. You may obtain a copy of the License at
  
   *
  
   * http://www.apache.org/licenses/LICENSE-2.0
  
   *
  
   * Unless required by applicable law or agreed to in writing, software distributed under the License
  
   * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
  
   * or implied. See the License for the specific language governing permissions and limitations under
  
   * the License.
  
   */
  
  
  
  package com.google.android.apps.watchme;
  
  
  
  import android.Manifest;
  
  import android.app.Activity;
  
  import android.content.ComponentName;
  
  import android.content.Context;
  
  import android.content.Intent;
  
  import android.content.ServiceConnection;
  
  import android.content.pm.PackageManager;
  
  import android.hardware.Camera;
  
  import android.os.Bundle;
  
  import android.os.IBinder;
  
  import android.os.PowerManager;
  
  import android.support.design.widget.Snackbar;
  
  import android.support.v4.app.ActivityCompat;
  
  import android.util.Log;
  
  import android.view.View;
  
  import android.view.View.OnClickListener;
  
  import android.widget.ToggleButton;
  
  
  
  import com.google.android.apps.watchme.util.Utils;
  
  import com.google.android.apps.watchme.util.YouTubeApi;
  
  
  
  import java.util.ArrayList;
  
  import java.util.List;
  
  
  
  /**
  
   * @author Ibrahim Ulukaya <ulukaya@google.com>
  
   *         <p></p>
  
   *         StreamerActivity class which previews the camera and streams via StreamerService.
  
   */
  
  public class StreamerActivity extends Activity {
  
      // CONSTANTS
  
      // TODO: Stop hardcoding this and read values from the camera's supported sizes.
  
      public static final int CAMERA_WIDTH = 640;
  
      public static final int CAMERA_HEIGHT = 480;
  
      private static final int REQUEST_CAMERA_MICROPHONE = 0;
  
  
  
      // Member variables
  
      private StreamerService streamerService;
  
      private ServiceConnection streamerConnection = new ServiceConnection() {
  
          @Override
  
          public void onServiceConnected(ComponentName className, IBinder service) {
  
              Log.d(MainActivity.APP_NAME, "onServiceConnected");
  
  
  
              streamerService = ((StreamerService.LocalBinder) service).getService();
  
  
  
              restoreStateFromService();
  
              startStreaming();
  
          }
  
  
  
          @Override
  
          public void onServiceDisconnected(ComponentName className) {
  
              Log.e(MainActivity.APP_NAME, "onServiceDisconnected");
  
  
  
              // This should never happen, because our service runs in the same process.
  
              streamerService = null;
  
          }
  
      };
  
      private PowerManager.WakeLock wakeLock;
  
      private Preview preview;
  
      private String rtmpUrl;
  
      private String broadcastId;
  
  
  
      @Override
  
      public void onCreate(Bundle savedInstanceState) {
  
          Log.d(MainActivity.APP_NAME, "onCreate");
  
          super.onCreate(savedInstanceState);
  
  
  
          broadcastId = getIntent().getStringExtra(YouTubeApi.BROADCAST_ID_KEY);
  
          //Log.v(MainActivity.APP_NAME, broadcastId);
  
  
  
          rtmpUrl = getIntent().getStringExtra(YouTubeApi.RTMP_URL_KEY);
  
  
  
          if (rtmpUrl == null) {
  
              Log.w(MainActivity.APP_NAME, "No RTMP URL was passed in; bailing.");
  
              finish();
  
          }
  
          Log.i(MainActivity.APP_NAME, String.format("Got RTMP URL '%s' from calling activity.", rtmpUrl));
  
  
  
          setContentView(R.layout.streamer);
  
          preview = (Preview) findViewById(R.id.surfaceViewPreview);
  
  
  
          if (!bindService(new Intent(this, StreamerService.class), streamerConnection,
  
                  BIND_AUTO_CREATE | BIND_DEBUG_UNBIND)) {
  
              Log.e(MainActivity.APP_NAME, "Failed to bind StreamerService!");
  
          }
  
  
  
          final ToggleButton toggleButton = (ToggleButton) findViewById(R.id.toggleBroadcasting);
  
          toggleButton.setOnClickListener(new OnClickListener() {
  
              @Override
  
              public void onClick(View v) {
  
                  if (toggleButton.isChecked()) {
  
                      streamerService.startStreaming(rtmpUrl);
  
                  } else {
  
                      streamerService.stopStreaming();
  
                  }
  
              }
  
          });
  
      }
  
  
  
      @Override
  
      protected void onResume() {
  
          Log.d(MainActivity.APP_NAME, "onResume");
  
  
  
          super.onResume();
  
  
  
          if (streamerService != null) {
  
              restoreStateFromService();
  
          }
  
      }
  
  
  
      @Override
  
      protected void onPause() {
  
          Log.d(MainActivity.APP_NAME, "onPause");
  
  
  
          super.onPause();
  
  
  
          if (preview != null) {
  
              preview.setCamera(null);
  
          }
  
  
  
          if (streamerService != null) {
  
              streamerService.releaseCamera();
  
          }
  
      }
  
  
  
      @Override
  
      protected void onDestroy() {
  
          Log.d(MainActivity.APP_NAME, "onDestroy");
  
  
  
          super.onDestroy();
  
  
  
          if (streamerConnection != null) {
  
              unbindService(streamerConnection);
  
          }
  
  
  
          stopStreaming();
  
  
  
          if (streamerService != null) {
  
              streamerService.releaseCamera();
  
          }
  
      }
  
  
  
      private void restoreStateFromService() {
  
          preview.setCamera(Utils.getCamera(Camera.CameraInfo.CAMERA_FACING_FRONT));
  
      }
  
  
  
      private void startStreaming() {
  
          Log.d(MainActivity.APP_NAME, "startStreaming");
  
  
  
          PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
  
          wakeLock = pm.newWakeLock(PowerManager.SCREEN_DIM_WAKE_LOCK, this.getClass().getName());
  
          wakeLock.acquire();
  
  
  
          if (!streamerService.isStreaming()) {
  
  
  
              String cameraPermission = Manifest.permission.CAMERA;
  
              String microphonePermission = Manifest.permission.RECORD_AUDIO;
  
              int hasCamPermission = checkSelfPermission(cameraPermission);
  
              int hasMicPermission = checkSelfPermission(microphonePermission);
  
              List<string> permissions = new ArrayList<string>();
  
              if (hasCamPermission != PackageManager.PERMISSION_GRANTED) {
  
                  permissions.add(cameraPermission);
  
                  if (ActivityCompat.shouldShowRequestPermissionRationale(this,
  
                          Manifest.permission.CAMERA)) {
  
                      // Provide rationale in Snackbar to request permission
  
                      Snackbar.make(preview, R.string.permission_camera_rationale,
  
                              Snackbar.LENGTH_INDEFINITE).show();
  
                  } else {
  
                      // Explain in Snackbar to turn on permission in settings
  
                      Snackbar.make(preview, R.string.permission_camera_explain,
  
                              Snackbar.LENGTH_INDEFINITE).show();
  
                  }
  
              }
  
              if (hasMicPermission != PackageManager.PERMISSION_GRANTED) {
  
                  permissions.add(microphonePermission);
  
                  if (ActivityCompat.shouldShowRequestPermissionRationale(this,
  
                          Manifest.permission.RECORD_AUDIO)) {
  
                      // Provide rationale in Snackbar to request permission
  
                      Snackbar.make(preview, R.string.permission_microphone_rationale,
  
                              Snackbar.LENGTH_INDEFINITE).show();
  
                  } else {
  
                      // Explain in Snackbar to turn on permission in settings
  
                      Snackbar.make(preview, R.string.permission_microphone_explain,
  
                              Snackbar.LENGTH_INDEFINITE).show();
  
                  }
  
              }
  
              if (!permissions.isEmpty()) {
  
                  String[] params = permissions.toArray(new String[permissions.size()]);
  
                  ActivityCompat.requestPermissions(this, params, REQUEST_CAMERA_MICROPHONE);
  
              } else {
  
                  // We already have permission, so handle as normal
  
                  streamerService.startStreaming(rtmpUrl);
  
              }
  
          }
  
      }
  
  
  
      /**
  
       * Callback received when a permissions request has been completed.
  
       */
  
      @Override
  
      public void onRequestPermissionsResult(int requestCode,
  
                                             String permissions[], int[] grantResults) {
  
          switch (requestCode) {
  
              case REQUEST_CAMERA_MICROPHONE: {
  
                  Log.i(MainActivity.APP_NAME, "Received response for camera with mic permissions request.");
  
  
  
                  // We have requested multiple permissions for contacts, so all of them need to be
  
                  // checked.
  
                  if (Utils.verifyPermissions(grantResults)) {
  
                      // permissions were granted, yay! do the
  
                      // streamer task you need to do.
  
                      streamerService.startStreaming(rtmpUrl);
  
                  } else {
  
                      Log.i(MainActivity.APP_NAME, "Camera with mic permissions were NOT granted.");
  
                      Snackbar.make(preview, R.string.permissions_not_granted,
  
                              Snackbar.LENGTH_SHORT)
  
                              .show();
  
                  }
  
                  break;
  
              }
  
  
  
              // other 'switch' lines to check for other
  
              // permissions this app might request
  
          }
  
          return;
  
      }
  
  
  
  
  
      private void stopStreaming() {
  
          Log.d(MainActivity.APP_NAME, "stopStreaming");
  
  
  
          if (wakeLock != null) {
  
              wakeLock.release();
  
              wakeLock = null;
  
          }
  
  
  
          if (streamerService.isStreaming()) {
  
              streamerService.stopStreaming();
  
          }
  
      }
  
  
  
      public void endEvent(View view) {
  
          Intent data = new Intent();
  
          data.putExtra(YouTubeApi.BROADCAST_ID_KEY, broadcastId);
  
          if (getParent() == null) {
  
              setResult(Activity.RESULT_OK, data);
  
          } else {
  
              getParent().setResult(Activity.RESULT_OK, data);
  
          }
  
          finish();
  
      }
  
  
  
  }
  
  </string></string>

  Update ERROR CODE :

  08:57:14.447  18829-18829/com.google.android.apps.watchme E/AndroidRuntime﹕ FATAL EXCEPTION: main
  
      Process: com.google.android.apps.watchme, PID: 18829
  
      java.lang.UnsatisfiedLinkError: Couldn't load ffmpeg from loader dalvik.system.PathClassLoader[DexPathList[[zip file "/data/app/com.google.android.apps.watchme-1.apk"],nativeLibraryDirectories=[/data/app-lib/com.google.android.apps.watchme-1, /vendor/lib, /system/lib]]]: findLibrary returned null
  
              at java.lang.Runtime.loadLibrary(Runtime.java:358)
  
              at java.lang.System.loadLibrary(System.java:526)
  
              at com.google.android.apps.watchme.Ffmpeg.<clinit>(Ffmpeg.java:26)
  
              at com.google.android.apps.watchme.VideoStreamingConnection.open(VideoStreamingConnection.java:71)
  
              at com.google.android.apps.watchme.StreamerService.startStreaming(StreamerService.java:80)
  
              at com.google.android.apps.watchme.StreamerActivity.startStreaming(StreamerActivity.java:212)
  
              at com.google.android.apps.watchme.StreamerActivity.access$200(StreamerActivity.java:47)
  
              at com.google.android.apps.watchme.StreamerActivity$1.onServiceConnected(StreamerActivity.java:64)
  
              at android.app.LoadedApk$ServiceDispatcher.doConnected(LoadedApk.java:1110)
  
              at android.app.LoadedApk$ServiceDispatcher$RunConnection.run(LoadedApk.java:1127)
  
              at android.os.Handler.handleCallback(Handler.java:733)
  
              at android.os.Handler.dispatchMessage(Handler.java:95)
  
              at android.os.Looper.loop(Looper.java:136)
  
              at android.app.ActivityThread.main(ActivityThread.java:5097)
  
              at java.lang.reflect.Method.invokeNative(Native Method)
  
              at java.lang.reflect.Method.invoke(Method.java:515)
  
              at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
  
              at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
  
              at dalvik.system.NativeStart.main(Native Method)
  
  </clinit>