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• Videos which is only played by particular app, need help to save it

  19 septembre 2015, par Kumar

  There’s a app(i can’t disclose the app name) which plays video stored in memory card and videos have no extension, by viewing the file sizes im assuming that they are the videos + I also check changing the extension with mp4 flv 3gp etc but no success. I then decompiled the app and saw that app is using ffmpeg-jni to play the videos. Anybody can help me in this ? and yeah all videos have IGN in their meta tag.

  Thanks

• how to integrate audio with video in android using javacv/opencv ?

  11 mai 2016, par rams

  For my application i created video from set of images by using javacv/opencv in android.but that video plays with out sound.so i want to add my recorded audio(mp3 file) to that generated video how can i achieve it ?

  This is my code which is used to get video from images,

                  String path =SCREENSHOT_FOLDER2; 
  
  
  
              File folder = new File(path);
  
  
  
  
  
                  listOfFiles = folder.listFiles();  
  
                  if(listOfFiles.length>0)
  
                  {
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
                iplimage = new opencv_core.IplImage[listOfFiles.length];
  
  
  
  
  
                 for (int j = 0; j < listOfFiles.length; j++) {
  
  
  
                   String files="";       
  
  
  
                 if (listOfFiles[j].isFile()) 
  
                 {
  
                 files = listOfFiles[j].getName();
  
  
  
                   }   
  
  
  
  
  
                  String[] tokens = files.split("\\.(?=[^\\.]+$)");
  
                 String name=tokens[0]; 
  
  
  
                  System.out.println(" j " + name);
  
  
  
  
  
  
  
  
  
                iplimage[j]=cvLoadImage("/mnt/sdcard/images/"+name+".png");
  
  
  
  
  
                 }
  
  
  
              } 
  
  
  
  
  
  
  
                  File videopath = new File(SCREENSHOT_FOLDER3);
  
                  videopath.mkdirs();
  
                   FFmpegFrameRecord recorder = new          
  
                      FFmpegFrameRecord(SCREENSHOT_FOLDER3+
  
                    "video"+System.currentTimeMillis()+".mp4",320,480);
  
  
  
                   try {
  
                       recorder.setCodecID(CODEC_ID_MPEG4); //CODEC_ID_MPEG4                            
  
                       //CODEC_ID_MPEG1VIDEO
  
                       recorder.setBitrate(sampleVideoBitRate);
  
                       recorder.setFrameRate(10);                     
  
                       recorder.setPixelFormat(PIX_FMT_YUV420P); //PIX_FMT_YUV420P
  
  
  
  
  
                       recorder.start();
  
  
  
                       int x = 0;
  
                       int y = 0;
  
                      for (int i=0;i< 300 && x(y+10)) {
  
                              y=y+1;
  
                              x++;
  
                          }
  
  
  
                          }
  
                       recorder.stop();
  
                      }
  
                   catch (Exception e){
  
                       e.printStackTrace();
  
                     }

  now how to integrate audio file(.mp3) file in this code.

• Video stream played too fast if HTTP Live Stream starts at the beginning

  22 avril 2013, par monkeymad2

  Bit of an odd problem this, I'm building a server that Transcodes video and streams it to the WiiU.

  The WiiU seems to have quite good support of HTTP Live Streams, but I'm running into a problem where the video stream will play about x3 faster than intended (the audio plays at normal rate).

  I'd figure something was up with my ffmpeg command, but if I let the stream run (so the first segment grabbed by the WiiU isn't actually the first segment) before I actually connect to it the WiiU will play the video at the normal rate !

  Here's the ffmpeg command I've been using (post-shlex breakup) :

  ['./ffmpeg', '-threads', '4', '-i', '../../Torrents/Breaking.Bad.S05E02.720p.HDTV.x264-ORENJI.mkv', '-map', '0', '-codec:v', 'libx264', '-preset', 'superfast', '-codec:a', 'aac', '-ac', '2', '-crf', '23', '-flags', '-global_header', '-strict', 'experimental', '-f', 'segment', '-segment_list', 'playlist.m3u8', '-segment_list_flags', '+live', '-segment_time', '10', 'tmp/out%03d.ts']

  And the first few lines of the .m3u8 :

  #EXTM3U
  
  #EXT-X-VERSION:3
  
  #EXT-X-MEDIA-SEQUENCE:0
  
  #EXT-X-ALLOWCACHE:1
  
  #EXT-X-TARGETDURATION:10
  
  #EXTINF:11.761756,
  
  tmp/out000.ts
  
  #EXTINF:8.591911,
  
  tmp/out001.ts
  
  #EXTINF:18.810467,
  
  tmp/out002.ts
  
  #EXTINF:7.841178,
  
  ...

  (PS, VLC + Safari can play the stream file.)

  Any ideas what's happening ?

  If it's a bug I have to work around rather than solve, any recommendations ?

  Just tested starting the stream with a dummy.ts file (knowing it wont be read as the wiiu only reads the last 3 files in live mode) it still had the speedup, implying that it's something ffmpeg is putting in the first file (and only the first file...)