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• bigbluebutton ...

  7 mars 2015, par signo

  ---

  Hello i have a BigBlueButton (0.9.0-beta (622)) installation on Debian Wheezy (7.8) all is ok except archiving recordings...

  in the log (/var/log/bigbluebutton/archive-488052dc7c095c74bf8992ec51a66298db04b765-1425642166675.log) i have always same message :

  I, [2015-03-06T11:48:19.320704 #4550]  INFO -- : Archiving events for 488052dc7c095c74bf8992ec51a66298db04b765-1425642166675.
  
  W, [2015-03-06T11:48:19.851280 #4550]  WARN -- : Failed to archive events for 488052dc7c095c74bf8992ec51a66298db04b765-1425642166675. Permission denied - /var/bigbluebutton/recording/raw/488052dc7c095c74bf8992ec51a66298db04b765-1425642166675/events.xml (complete error below...)

  but all directory are writable by right user (tomcat7).

  More Info :

  bbb packages installed

  ii  bbb-apps                              0.9.0-1ubuntu88               amd64        BigBlueButton applications for Red5
  
  ii  bbb-apps-deskshare                    0.9.0-1ubuntu25               amd64        BigBlueButton deskshare module for Red5
  
  ii  bbb-apps-sip                          0.9.0-1ubuntu19               amd64        BigBlueButton SIP module for Red5
  
  ii  bbb-apps-video                        0.9.0-1ubuntu18               amd64        BigBlueButton video module for Red5
  
  ii  bbb-client                            0.9.0-1ubuntu235              all          BigBlueButton Flash client
  
  ii  bbb-config                            0.9.0-1ubuntu42               all          BigBlueButton configuration
  
  rc  bbb-demo                              0.9.0-1ubuntu8                amd64        BigBlueButton API demos
  
  ii  bbb-freeswitch                        0.9.0-1ubuntu38               amd64        BigBlueButton build of FreeSWITCH 1.5.x
  
  ii  bbb-mkclean                           0.8.7-1                       amd64        tool to clean and optimize Matroska and WebM files
  
  ii  bbb-office                            0.9.0-1ubuntu6                amd64        BigBlueButton wrapper for LibreOffice
  
  ii  bbb-playback-presentation             0.9.0-1ubuntu11               amd64        BigBluebutton playback of presentation
  
  ii  bbb-record-core                       0.9.0-1ubuntu37               amd64        BigBlueButton record and playback
  
  ii  bbb-red5                              0.9.0-1ubuntu25               amd64        The Red5 server for bbb
  
  ii  bbb-swftools                          0.9.2-1ubuntu14               amd64        The swftools files for bbb
  
  ii  bbb-web                               0.9.0-1ubuntu54               all          BigBlueButton API
  
  ii  bigbluebutton                         0.9.0-1ubuntu2                amd64        Open source web conferencing platform (bbb)

  ---

  bbb-conf —check

  BigBlueButton Server 0.9.0-beta (622)
  
                      Kernel version: 3.16.0-4-amd64(64-bit)
  
                              Memory: 12044 MB
  
  
  
  /var/www/bigbluebutton/client/conf/config.xml (bbb-client)
  
          Port test (tunnel): 2xx.xxx.xxx.xx
  
                                Red5: 2xx.xxx.xxx.xx
  
                useWebrtcIfAvailable: true
  
  
  
  /opt/freeswitch/conf/sip_profiles/external.xml (FreeSWITCH)
  
                      websocket port: 5066
  
                      WebRTC enabled: true
  
  
  
  /etc/nginx/sites-available/bigbluebutton (nginx)
  
                         server name: 2xx.xxx.xxx.xx
  
                                port: 80
  
                      bbb-client dir: /var/www/bigbluebutton
  
  
  
  /var/lib/tomcat7/webapps/bigbluebutton/WEB-INF/classes/bigbluebutton.properties (bbb-web)
  
                        bbb-web host: 2xx.xxx.xxx.xx
  
  
  
  /usr/share/red5/webapps/bigbluebutton/WEB-INF/red5-web.xml (red5)
  
                    voice conference: FreeSWITCH
  
                       capture video: true
  
                     capture desktop: true
  
  
  
  /usr/local/bigbluebutton/core/scripts/bigbluebutton.yml (record and playback)
  
                       playback host: 2xx.xxx.xxx.xx
  
  
  
  
  
  * Potential problems described below **
  
      # IP does not match:
  
      #                           IP from ifconfig: 172.xx.xxx.xx
  
      #   /etc/nginx/sites-available/bigbluebutton: 2xx.xxx.xxx.xx
  
      # Error: Unable to connect to port 1935 (RTMP) 2xx.xxx.xxx.xx
  
  
  
      # Error: Unable to connect to port 9123 (desktop sharing) on 212.xxx.xxx.xx

  ---

  ls -l /var/freeswitch/meetings/

  -rw-r--r-- 1 freeswitch daemon 5139984 Mar  6 11:44 488052dc7c095c74bf8992ec51a66298db04b765-1425642166675-81976383.wav

  ---

  ls -l /usr/share/red5/webapps/video/streams/488052dc7c095c74bf8992ec51a66298db04b765-1425642166675/

  -rw-rw-r-- 1 red5 red5 438342 Mar  6 11:44 320x240-cztd6nyzasaz_1-1425642114164.flv

  ---

  ls -l /usr/share/red5/webapps/video/streams/488052dc7c095c74bf8992ec51a66298db04b765-1425642166675/

  -rw-rw-r-- 1 red5 red5 438342 Mar  6 11:44 320x240-cztd6nyzasaz_1-1425642114164.flv

  ---

  cat /usr/share/red5/webapps/video/WEB-INF/red5-web.xml

  <bean class="org.bigbluebutton.app.video.VideoApplication">
  
          <property value="true"></property>
  
          <property ref="redisRecorder"></property>
  
  </bean>

  ---

  cat /usr/share/red5/webapps/deskshare/WEB-INF/red5-web.xml

   <bean class="org.bigbluebutton.deskshare.server.stream.StreamManager">
  
      
  
      
  
   </bean>

  ---

  bbb-record —watch

  Every 2.0s: bbb-record --list20                                                                                                                                   Fri Mar  6 11:53:58 2015
  
  
  
  Internal MeetingID                                               Time                APVD APVDE RAS Slides Processed            Published           External MeetingID
  
  ------------------------------------------------------  ---------------------------- ---- ----- --- ------ -------------------- ------------------  -------------------
  
  57d9849193299cebe9409d1c98d175958331d34a-1425642748807  Fri 6 Mar 11:52:28 GMT 2015   X                  5
  
  488052dc7c095c74bf8992ec51a66298db04b765-1425642166675  Fri 6 Mar 11:42:46 GMT 2015  XXX         X       6

  ---

  bbb-record —debug

  E, [2015-03-06T11:48:20.335578 #4548] ERROR -- : Sanity check failed on 488052dc7c095c74bf8992ec51a66298db04b765-1425642166675

  ---

  cat /var/log/bigbluebutton/archive-488052dc7c095c74bf8992ec51a66298db04b765-1425642166675.log

  # Logfile created on 2015-03-06 11:48:19 +0000 by logger.rb/31641
  
  I, [2015-03-06T11:48:19.320704 #4550]  INFO -- : Archiving events for 488052dc7c095c74bf8992ec51a66298db04b765-1425642166675.
  
  W, [2015-03-06T11:48:19.851280 #4550]  WARN -- : Failed to archive events for 488052dc7c095c74bf8992ec51a66298db04b765-1425642166675. Permission denied - /var/bigbluebutton/recording/raw/488052dc7c095c74bf8992ec51a66298db04b765-1425642166675/events.xml
  
  I, [2015-03-06T11:48:19.851428 #4550]  INFO -- : Fetching the recording marks for 488052dc7c095c74bf8992ec51a66298db04b765-1425642166675.
  
  I, [2015-03-06T11:48:19.851501 #4550]  INFO -- : Getting record status events
  
  W, [2015-03-06T11:48:19.851585 #4550]  WARN -- : Failed to fetch the recording marks for 488052dc7c095c74bf8992ec51a66298db04b765-1425642166675. Permission denied - /var/bigbluebutton/recording/raw/488052dc7c095c74bf8992ec51a66298db04b765-1425642166675/events.xml
  
  I, [2015-03-06T11:48:19.851645 #4550]  INFO -- : Archiving audio /var/freeswitch/meetings/488052dc7c095c74bf8992ec51a66298db04b765-1425642166675*.wav.
  
  W, [2015-03-06T11:48:19.851920 #4550]  WARN -- : Failed to archive audio for 488052dc7c095c74bf8992ec51a66298db04b765-1425642166675. Permission denied - /var/bigbluebutton/recording/raw/488052dc7c095c74bf8992ec51a66298db04b765-1425642166675/audio
  
  I, [2015-03-06T11:48:19.851981 #4550]  INFO -- : Archiving presentation for 488052dc7c095c74bf8992ec51a66298db04b765-1425642166675.
  
  W, [2015-03-06T11:48:19.852257 #4550]  WARN -- : Failed to archive presentations for 488052dc7c095c74bf8992ec51a66298db04b765-1425642166675. Permission denied - /var/bigbluebutton/recording/raw/488052dc7c095c74bf8992ec51a66298db04b765-1425642166675/presentation
  
  I, [2015-03-06T11:48:19.852322 #4550]  INFO -- : Archiving deskshare for 488052dc7c095c74bf8992ec51a66298db04b765-1425642166675.
  
  W, [2015-03-06T11:48:19.852561 #4550]  WARN -- : Failed to archive deskshare for 488052dc7c095c74bf8992ec51a66298db04b765-1425642166675. Permission denied - /var/bigbluebutton/recording/raw/488052dc7c095c74bf8992ec51a66298db04b765-1425642166675/deskshare
  
  I, [2015-03-06T11:48:19.852620 #4550]  INFO -- : Archiving video for 488052dc7c095c74bf8992ec51a66298db04b765-1425642166675.
  
  W, [2015-03-06T11:48:19.852834 #4550]  WARN -- : Failed to archive video for 488052dc7c095c74bf8992ec51a66298db04b765-1425642166675. Permission denied - /var/bigbluebutton/recording/raw/488052dc7c095c74bf8992ec51a66298db04b765-1425642166675/video

  ---

  all folder under /var/bigbluebutton/ have same rights (drwxrwxrwx tomcat7 tomcat7)

  ls -l /var/bigbluebutton/

  total 40
  
  drwxr-xr-x 3 tomcat7 tomcat7 4096 Mar  6 11:42 488052dc7c095c74bf8992ec51a66298db04b765-1425642166675
  
  drwxr-xr-x 3 tomcat7 tomcat7 4096 Mar  6 11:52 57d9849193299cebe9409d1c98d175958331d34a-1425642748807
  
  drwxrwxrwx 2 tomcat7 tomcat7 4096 Mar  3 15:52 blank
  
  drwxrwxrwx 2 tomcat7 tomcat7 4096 Feb 17 17:17 configs
  
  drwxrwxrwx 2 tomcat7 tomcat7 4096 Mar  3 15:57 deskshare
  
  drwxrwxrwx 2 tomcat7 tomcat7 4096 Mar  3 15:57 meetings
  
  drwxrwxrwx 3 tomcat7 tomcat7 4096 Mar  3 15:52 playback
  
  drwxrwxrwx 3 tomcat7 tomcat7 4096 Mar  3 15:57 published
  
  drwxrwxrwx 6 tomcat7 tomcat7 4096 Mar  3 15:57 recording
  
  drwxrwxrwx 2 tomcat7 tomcat7 4096 Mar  3 15:57 unpublished

  ---

• C++/OpenCV - VideoCapture doesn't work but it worked before with exactly the same code

  5 mars 2015, par Damià Obrador

  I’m trying to write a shot boundary detection algorithm in C++ using OpenCV. After all, I have to say that I have no experience working with OpenCV.

  I have been improving the following code (and I am still in it) during the last two weeks and everything seems the works correctly, not in terms of perfect shot detection, but every line of code did what was expected from it.

  #include <cstdlib>
  
  #include <opencv2></opencv2>opencv.hpp>
  
  #include <opencv2></opencv2>core/core.hpp>
  
  #include <opencv2></opencv2>video/background_segm.hpp>
  
  #include <opencv2></opencv2>highgui/highgui.hpp>
  
  #include <iostream>
  
  #include <opencv2></opencv2>imgproc/imgproc.hpp>
  
  #include 
  
  #include <istream>
  
  #include <fstream>
  
  using namespace cv;
  
  
  
  
  
  
  
  int main(){
  
  
  
      VideoCapture capture("vdevendetta.mp4");
  
      if ( !capture.isOpened() )
  
       {
  
           std::cout &lt;&lt; "Cannot open the video file";
  
           return -1;
  
       }
  
      int numFrames=capture.get(CV_CAP_PROP_FRAME_COUNT);
  
      bool SB_counter=false;
  
      Mat currentFrame;
  
      Mat frame;
  
      Mat fore;
  
      Mat back;
  
      vector<mat> frames;
  
      FileStorage file;
  
      FileStorage file2;
  
      Mat prev_Y;
  
      Mat channels[3];
  
      for(int i=0;i>currentFrame;
  
              frame=currentFrame.clone();
  
              cvtColor(frame,frame,CV_BGR2YUV);
  
              split( frame, channels );
  
              prev_Y=channels[0];
  
              SB_counter=false;
  
          }
  
          else
  
          {
  
              capture>>currentFrame;
  
              frame=currentFrame.clone();
  
              Mat channels[3];
  
              cvtColor(frame,frame,CV_BGR2YUV);
  
              split( frame, channels );
  
              Mat curr_Y=channels[0];
  
              channels[0]=prev_Y;
  
              prev_Y=curr_Y;
  
              merge(channels,3,frame);
  
              cvtColor(frame,frame,CV_Luv2BGR);
  
              cvtColor(frame,frame,CV_BGR2GRAY);
  
              frames.push_back(frame);
  
          }
  
  
  
      }
  
  
  
      vector<double> MAFDs;
  
      vector<double> MAFD;
  
      vector<double> aux;
  
      double min;
  
      double min2;
  
  
  
      for(int j=1;j14)
  
          {
  
              std::cout&lt;&lt;"De"&lt;*
  
      std::ofstream fout("MAFD.txt");
  
      if(fout.is_open()==true)
  
      {
  
        //file opened successfully so we are here
  
        std::cout &lt;&lt; "File Opened successfully!!!. Writing data from array to file" &lt;&lt; std::endl;
  
  
  
          for(int i = 0; MAFD[i] != '\0'; i++)
  
          {
  
          fout &lt;&lt; MAFD[i]; //writing ith character of array in the file
  
          }
  
        std::cout &lt;&lt; "Array data successfully saved into the file test.txt" &lt;&lt; std::endl;
  
      }
  
      else //file could not be opened
  
      {
  
          std::cout &lt;&lt; "File could not be opened." &lt;&lt; std::endl;
  
      }*/
  
      return 0;
  
  }
  
  </double></double></double></mat></fstream></istream></iostream></cstdlib>

  Three days ago I had an strange problem. The line :

  VideoCapture capture("vdevendetta.mp4");

  stopped working. I spent many hours looking for the solution but nothing seems to repair it. After reading everything related with OpenCV, VideoCapture and ffmpeg that I found on internet I decided to reinstall everything taking care of each detail, but it still didn’t work. Finally I solved it changing the line with this other one :

  VideoCapture capture("/home/damia/Documentos/Universitat/ARA/PAEAV/workspace_cpp/SBD/src/vdevendetta.mp4");

  I did not know why this solved it because the video is in the same directory than the program, but I continued working because everything seemed correct.
  Today I had the same problem again on the new line.
  The terminal doesn’t show any error comment (exceptuating "Cannot open the video file", obviously) but the code doesn’t work again.

  I’m using Ubuntu 14.04 LTS, OpenCV 2.4.9 and Eclipse.

  I think if someone test the code it will run correctly, but I would like to know if there is something I have no taking into account.

  Thank you very match.

• h.264 video in mp4 container jumps when played in VLC

  30 avril 2013, par Jayanth Nayak

  I have H.264 video and AAC audio generated in Andriod phone recieved wirelessly using SIP protocol and muxed using FFMPEG APIs, The generated mp4 when played through VLC or other player is never in Sync.
  when I see the time bar of Video, it skips after a certain duration.

  For example :
  in a video of 20s, the time bar seeks upto 14s properly, then it jumps to 18s and finishes at 20. The audio plays properly.

  I have following questions :

  1. Is PTS DTS calculations really required for muxing WITHOUT Encoding ? :

  we used

  PTS = (90000 * (1/FPS) * FrameNumber) - although this did not work :(

  currently FFMPEG is taking care of it internally.

  ---

  1. Why the video jumps ? is it because of less number of frames or wrong PTS values or something else ?

  ---

  1. For the following cases although There is jump, I am getting a good AV sync
     -15,20,25 FPS qCIF & AAC Audio

     But for 15 & 20 FPS of qVGA & VGA the audio lags by 0.5 seconds and for 25 FPS, the Video is just playing fast.
     thus why is there a delay for qVGA and VGA but not present for qCIF ? any dependency of Resolution on Time Stamp (PTS) calculation ??

     Analysis of 25 FPS Video showed that there are enough number of frames for 10s but the total time for the video shown by VLC is 14s. Why is this so ? and again, this video also jumps from 9s to 13s.