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• merging audio files using FFmpegFrameRecorder

  1er juin 2015, par Sargam Modak

  I have successfully merged(not concatenate) two .aac audio files using ffmpegframerecorder but the output file is like very slow.
  Below is the code i have used.
  Is there anything i can use to speed up the output audio file. Is it related to framerate ?

  FFmpegFrameGrabber frameGrabber =
  
                  new FFmpegFrameGrabber("storage/sdcard0/Audio/audio.aac");      
  
          f=new File("/storage/sdcard0/Audio/audnew.aac");
  
          try {
  
              f.createNewFile();
  
          } catch (IOException e2) {
  
              // TODO Auto-generated catch block
  
              Log.d("def",e2.getLocalizedMessage());
  
          }
  
         FFmpegFrameGrabber grabber1 = new FFmpegFrameGrabber("/storage/sdcard0/Audio/smoke.aac");
  
          try {
  
              frameGrabber.start();
  
              grabber1.start();
  
          } catch (org.bytedeco.javacv.FrameGrabber.Exception e1) {
  
              // TODO Auto-generated catch block
  
              Log.d("here",e1.getLocalizedMessage());
  
          } 
  
          FFmpegFrameRecorder recorde = new FFmpegFrameRecorder(f, frameGrabber.getAudioChannels());
  
          try {
  
              recorde.setAudioCodec(AV_CODEC_ID_AAC);
  
              Log.d("12","here");
  
              recorde.setFrameRate(12);
  
              recorde.start();
  
              Frame frame1 = new Frame();
  
              Frame frame2 = new Frame();
  
              for (int i=0;i<1000000;i++)
  
              {
  
                  frame1 = grabber1.grabFrame();
  
                  frame2 = frameGrabber.grabFrame();
  
                  if (frame1==null || frame2==null) {
  
                      Log.d("er","Failed cvQueryFrame");
  
                      frameGrabber.release();
  
                      grabber1.release();
  
                      break;
  
                  }
  
                  recorde.record(frame1);
  
                  recorde.record(frame2);
  
  
  
              }
  
              recorde.stop();
  
              grabber1.stop();
  
  
  
          }catch(Exception e){
  
              Log.d("abc", e.getLocalizedMessage());
  
          }

• ffmpeg armv7s compile segmentation fault

  13 mai 2015, par Sergey92zp

  I use https://github.com/kewlbear/FFmpeg-iOS-build-script to compile ffmpeg,
  but when i try to compile, for armv7s architecture i have next error

  all other archs compile fine

  clang : error : unable to execute command : Segmentation fault : 11 clang :
  error : clang frontend command failed due to signal (use -v to see
  invocation) Apple LLVM version 6.1.0 (clang-602.0.49) (based on LLVM
  3.6.0svn) Target : arm-apple-darwin14.3.0 Thread model : posix clang : note : diagnostic msg : PLEASE submit a bug report to
  http://developer.apple.com/bugreporter/ and include the crash
  backtrace, preprocessed source, and associated run script. clang :
  note : diagnostic msg :

  ---

  PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT : Preprocessed
  source(s) and associated run script(s) are located at : clang : note :
  diagnostic msg :
  /var/folders/zk/wj2cn08s26x64nlzk3_kjnv80000gn/T/vp8-c6ec27.c clang :
  note : diagnostic msg :
  /var/folders/zk/wj2cn08s26x64nlzk3_kjnv80000gn/T/vp8-c6ec27.sh clang :
  note : diagnostic msg :

  ******************** make : * [libavcodec/vp8.o] Error 254 make : * Waiting for unfinished jobs.... CC libavcodec/wmv2enc.o

  Couple months ago all compiled without any errors.
  Tried on couple versions of ffmpeg

  Here is Clang -v

  Apple LLVM version 6.1.0 (clang-602.0.49) (based on LLVM 3.6.0svn)
  Target : x86_64-apple-darwin14.3.0 Thread model : posix

  and xcode version is Version 6.3.1 (6D1002)

• Unable to upload video from iPhone with paperclip-ffmpeg in Ruby on Rails

  13 mai 2015, par sank

  When I upload a video from an iPhone, I’m getting the following error :

  Command :: PATH=/usr/bin/:$PATH; file -b --mime '/tmp/6da355e988ec841811d8803dfd5cf44c20150513-8103-b4lkam.MOV'
  
  [paperclip] Content Type Spoof: Filename IMG_2637.MOV (["video/quicktime"]), content type discovered from file command: inode/x-empty. See documentation to allow this combination.
  
  (0.6ms)  ROLLBACK
  
  Completed 400 Bad Request in 58ms (Views: 0.9ms | ActiveRecord: 5.0ms)

  (This works perfectly when I upload the same video from desktop.)

  I used gems "paperclip", "~> 4.1" and "paperclip-ffmpeg".

  In my video model :

  validates_attachment_content_type :student_video, content_type: /\Avideo\/.*\Z/

  also tried out

  validates_attachment_content_type :student_video, :content_type => ['video/x-   
  
  #                                        msvideo', 'video/avi', 'video/quicktime', 'video/3gpp', 'video/x-ms-
  
  #                                        wmv', 'video/mp4', 'flv-application/octet-stream', 'video/x-
  
  #                                        flv', 'video/mpeg', 'video/mpeg4', 'video/x-la-asf', 'video/x-ms-asf']

  But I’m getting the same error.