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• FFMPEG "Malformed AAC bitstream detected" error while trying to transcode video file with c++

  14 octobre 2015, par doğan

  I am working with ffmpeg transcoding.c example.
  When i set video encoder codec to AV_CODEC_ID_H264 and audio encoder codec to AV_CODEC_ID_AAC
  I got following error.
  error

  How can i fix this problem.

• Unable to merge videos in Android using JavaCV ("Sample Description" Error)

  15 décembre 2015, par San

  I am creating a video from images via FFMPEG and I am able to get the video from images. I am also making use of JavaCV to merge two videos and I am able to join videos using JavaCV without any issues provided both the videos are taken via camera, i.e, a video actually recorded via mobile camera.

  Issue that I’m facing :

  I am not able to merge the video that was generated from FFMPEG using the images along with the video user has chosen which will mostly be a video that was not generated and taken via mobile camera.

  CODE :
  Code to generate Video via Images :

                    FFmpegFrameRecorder recorder = new FFmpegFrameRecorder(path + "/" + "dec16.mp4", 800, 400);
  
                              try {
  
                                  recorder.setVideoCodec(avcodec.AV_CODEC_ID_MPEG4);
  
                                  //recorder.setVideoCodec(avcodec.AV_CODEC_ID_H264);
  
                                  recorder.setVideoCodecName("H264");
  
                                  recorder.setVideoOption("preset", "ultrafast");
  
                                  recorder.setFormat("mp4");
  
                                  recorder.setFrameRate(frameRate);
  
                                  recorder.setVideoBitrate(60);
  
                                  recorder.setPixelFormat(avutil.AV_PIX_FMT_YUV420P);
  
                                  startTime = System.currentTimeMillis();
  
                                  recorder.start();
  
                                  for(int j=0;j recorder.getTimestamp()) {
  
  
  
                                          recorder.setTimestamp(t);
  
                                          recorder.record(image);
  
                                      }
  
                                  }
  
                                  recorder.stop();
  
                              } catch (Exception e) {
  
                                  e.printStackTrace();
  
                              }

  Code to merge Videos :

   int count = file_path.size();
  
              System.out.println("final_joined_list size " + file_path.size());
  
              if (file_path.size() != 1) {
  
                  try {
  
                      Movie[] inMovies = new Movie[count];
  
                      mediaStorageDir = new File(
  
                              Environment.getExternalStorageDirectory()
  
                                      + "/Pictures");
  
  
  
                      for (int i = 0; i < count; i++) {
  
                          File file = new File(file_path.get(i));
  
                          System.out.println("fileeeeeeeeeeeeeeee " + file);
  
                          System.out.println("file exists!!!!!!!!!!");
  
  
  
                          FileInputStream fis = new FileInputStream(file);
  
                          FileChannel fc = fis.getChannel();
  
                          inMovies[i] = MovieCreator.build(fc);
  
                          fis.close();
  
                          fc.close();
  
  
  
                      }
  
                      List<track> videoTracks = new LinkedList<track>();
  
                      List<track> audioTracks = new LinkedList<track>();
  
                      Log.d("Movies length", "isss  " + inMovies.length);
  
                      if (inMovies.length != 0) {
  
  
  
                          for (Movie m : inMovies) {
  
  
  
                              for (Track t : m.getTracks()) {
  
                                  if (t.getHandler().equals("soun")) {
  
                                      audioTracks.add(t);
  
                                  }
  
                                  if (t.getHandler().equals("vide")) {
  
                                      videoTracks.add(t);
  
                                  }
  
                                  if (t.getHandler().equals("")) {
  
  
  
                                  }
  
                              }
  
  
  
                          }
  
                      }
  
  
  
                      Movie result = new Movie();
  
  
  
                      System.out.println("audio and videoo tracks : "
  
                              + audioTracks.size() + " , " + videoTracks.size());
  
                      if (audioTracks.size() > 0) {
  
                          result.addTrack(new AppendTrack(audioTracks
  
                                  .toArray(new Track[audioTracks.size()])));
  
                      }
  
                      if (videoTracks.size() > 0) {
  
                          result.addTrack(new AppendTrack(videoTracks
  
                                  .toArray(new Track[videoTracks.size()])));
  
                      }
  
                      IsoFile out = null;
  
                      try {
  
                          out = (IsoFile) new DefaultMp4Builder().build(result);
  
                      } catch (Exception e) {
  
                          // TODO Auto-generated catch block
  
                          e.printStackTrace();
  
                      }
  
  
  
                      long timestamp = new Date().getTime();
  
                      String timestampS = "" + timestamp;
  
  
  
                      File storagePath = new File(mediaStorageDir
  
                              + File.separator);
  
                      storagePath.mkdirs();
  
                      File myMovie = new File(storagePath, String.format("%s.mp4", timestampS));
  
                      FileOutputStream fos = new FileOutputStream(myMovie);
  
                      FileChannel fco = fos.getChannel();
  
                      fco.position(0);
  
                      out.getBox(fco);
  
                      fco.close();
  
                      fos.close();
  
  
  
                  } catch (FileNotFoundException e) {
  
                      // TODO Auto-generated catch block
  
                      e.printStackTrace();
  
                  } catch (IOException e) {
  
                      // TODO Auto-generated catch block
  
                      e.printStackTrace();
  
                  }
  
                  String mFileName = Environment.getExternalStorageDirectory()
  
                          .getAbsolutePath();
  
                  // mFileName += "/output.mp4";
  
  
  
                  File sdCardRoot = Environment.getExternalStorageDirectory();
  
                  File yourDir = new File(mediaStorageDir + File.separator);
  
                  for (File f : yourDir.listFiles()) {
  
                      if (f.isFile())
  
                          name = f.getName();
  
                      // make something with the name
  
                  }
  
                  mFileName = mediaStorageDir.getPath() + File.separator
  
                          + "output-%s.mp4";
  
                  System.out.println("final filename : "
  
                          + mediaStorageDir.getPath() + File.separator
  
                          + "output-%s.mp4" + "names of files : " + name);
  
                  single_video = false;
  
                  return name;
  
              } else {
  
                  single_video = true;
  
                  name = file_path.get(0);
  
                  return name;
  
              }
  
  </track></track></track></track>

  Error :

  The Error that I am facing while trying to merge the videos generated via Images and a normal video is

  12-15 12:26:06.155  26022-26111/? W/System.err﹕ java.io.IOException: Cannot append com.googlecode.mp4parser.authoring.Mp4TrackImpl@45417c38 to com.googlecode.mp4parser.authoring.Mp4TrackImpl@44ffac60 since their Sample Description Boxes differ
  
  12-15 12:26:06.155  26022-26111/? W/System.err﹕ at com.googlecode.mp4parser.authoring.tracks.AppendTrack.<init>(AppendTrack.java:48)
  
  </init>

  Fix that I tried :

  Google advised me to change the CODEC in JavaCV from avcodec.AV_CODEC_ID_MPEG4 to avcodec.AV_CODEC_ID_H264. But when I did that, I am not able to get the video from images thereby throwing the following error :

  12-15 12:26:05.840  26022-26089/? W/linker﹕ libavcodec.so has text relocations. This is wasting memory and is a security risk. Please fix.
  
  12-15 12:26:05.975  26022-26089/? W/System.err﹕ com.googlecode.javacv.FrameRecorder$Exception: avcodec_open2() error -1: Could not open video codec.
  
  12-15 12:26:05.975  26022-26089/? W/System.err﹕ at com.googlecode.javacv.FFmpegFrameRecorder.startUnsafe(FFmpegFrameRecorder.java:492)
  
  12-15 12:26:05.975  26022-26089/? W/System.err﹕ at com.googlecode.javacv.FFmpegFrameRecorder.start(FFmpegFrameRecorder.java:267)

  What I need :

  Creating video from Images is inevitable and that video will definitely be used to merge with other videos which might have any Codec Formats. So I need to find a way to merge any kind of videos irrespective of their Codecs or any other parameters. I am trying to keep it simple by just using the Jars and SO files and I dont want to drive myself crazy by going on a full scale implementation of FFMPEG Library. That being said, I am also ready to look into that library if I dont have any other ways to achieve what I want but a solid resource with an ALMOST working code would be much appreciated. Cheers.

  Update :
  I looked upon the issues mentioned at GitHub of OpenCV, but didnt find anything solid from it.
  OpenCV Issues

• gcc error- "error adding symbols : DSO missing from command line"

  10 août 2015, par ben marder

  I’m trying to compile tutorial 01 from enter link description herehttp://dranger.com/ffmpeg/tutorial01.html
  copy pasted the code from here : http://dranger.com/ffmpeg/tutorial01.c
  tried to compile (on linux) like the tutorial said with :

  gcc -o tutorial01 tutorial01.c -lavformat -lavcodec -lswscale -lz

  and got an error

  : /usr/bin/ld: /tmp/ccIT5t82.o: undefined reference to symbol 'av_malloc@@LIBAVUTIL_51'
  
  /usr/lib/i386-linux-gnu/libavutil.so.51: error adding symbols: DSO missing from command line
  
  collect2: error: ld returned 1 exit status

  any suggestions ?