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• How to convert 7sec Video to Gif Android

  21 août 2014, par Donnie Ibiyemi

  Am making an app that convert shot video clips to Gif. i was wondering if there was a libary that directly converts videos to gifs on the Fly on Android.

  I’ve tried to extract all the frames of the video and encode them into a gif but am only getting the the first frame of the video. my code is below :

           public static final int GIF_DELAY_BETWEEN_FRAMES = 100;  
  
           public static final float SPEED_RATIO = 1.1f; 
  
  
  
           Uri videoFileUri=Uri.parse(mOutputFile.toString());
  
          FFmpegMediaMetadataRetriever retriever = new FFmpegMediaMetadataRetriever();
  
          retriever.setDataSource(mOutputFile.getAbsolutePath());
  
           rev = new ArrayList<bitmap>();
  
          MediaPlayer mp = MediaPlayer.create(RecorderActivity.this, videoFileUri);
  
           int millis = mp.getDuration();
  
           for(int i=1000000;itest.gif");
  
              outStream.write(generateGIF());
  
              outStream.close();
  
           }catch(Exception e){
  
              e.printStackTrace();
  
           }
  
  
  
  
  
          public byte[] generateGIF() {
  
          ByteArrayOutputStream bos = new ByteArrayOutputStream();
  
          AnimatedGifEncoder encoder = new AnimatedGifEncoder();
  
          encoder.setDelay((int)(GIF_DELAY_BETWEEN_FRAMES * (1 / SPEED_RATIO)));
  
          encoder.start(bos);
  
          for (Bitmap bitmap : rev) {
  
              encoder.addFrame(bitmap);
  
          }
  
          encoder.finish();
  
          return bos.toByteArray();
  
       }
  
  </bitmap>

  Please help me guys...thanks

• Revision eca93642e2 : Add a speed feature to give the tighter search range Add a speed feature to giv

  14 août 2014, par Pengchong Jin

  Changed Paths :
   Modify /vp9/encoder/vp9_encodeframe.c

  
   Modify /vp9/encoder/vp9_speed_features.c

  
   Modify /vp9/encoder/vp9_speed_features.h

  
  
  Add a speed feature to give the tighter search range

  Add a speed feature to give the tighter partition search
  range. Before partition search, calculate the histogram
  of the partition sizes of the left, above and previous
  co-located blocks of the current block. If the variance of
  observed partition sizes is small enough, adjust the search
  range around the mean partition size, which will be tigher.

  The feature is currently turned on at speed 2. Experiments on
  sample youtube clips show on average the runtime is reduced
  by 3-7%.

  For hard stdhd clips :
  park_joy_1080p @ 15000kbps : 509251 ms -> 491953 ms (3.3%)
  pedestrian_area_1080p @ 2000kbps : 223941 ms -> 214226 ms (4.3%)

  The PSNR performance is changed :
  derf : -0.112%
  yt : -0.099%
  hd : -0.090%
  stdhd :-0.102%

  Change-Id : Ie205ec5325bf92ec5676c243e30ba9d0adca10f2

• Error setting option pix_fmt to value -1 : Pipe a mp4 video with ffmpeg

  14 août 2014, par Lewisou

  I was piping a mp4 file and always got Error setting option pix_fmt to value -1.

  I was trying to put -pix_fmt option in front of ’-i inputfile’, as in the ffmpeg output I found a message : unspecified pixel format but it seems not work

  The ffmpeg outpus is here : http://pastebin.com/8hNdLeQ2

  By the way, the ffmpeg version I was using is the latest one from git repo

  And the mp4 video clip is from a sumsung tablet.

  The command I use :
  $ cat b2.mp4 | ./ffmpeg -i pipe:0 -c:a copy a.mp4

  I also tried :

  The video is at : https://www.dropbox.com/s/oz0e51ggkbpgj0f/b2.mp4

  Anyone can tell me how to pipe this mp4 video, Thanks,

  Lewis