如何将7秒视频转换为Gif Android [英] How to convert 7sec Video to Gif Android

问题描述

我正在制作一个将拍摄视频剪辑转换为Gif的应用程序。我想知道是否有一个可以在Android上直接将视频转换为GIF的文件。

我已经尝试提取视频的所有帧并对其进行编码成为一个gif，但我只得到了视频的第一帧。我的代码如下：

  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（）; （int i = 1000000; i< millis * 1000; i + = 1000000）{
 Bitmap bitmap = retriever.getFrameAtTime（i，FFmpegMediaMetadataRetriever.OPTION_CLOSEST）; 
 
 rev.add（bitmap）; 
 
} 
 
 FileOutputStream outStream = null; 
 try {
 outStream = new FileOutputStream（Environment.getExternalStorageDirectory（）+/test.gif）; 
 outStream.write（generateGIF（））; 
 outStream.close（）; 
} catch（Exception e）{
 e.printStackTrace（）; 
} 
 
 
 public byte [] generateGIF（）{$​​ b $ b 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（）; 
} 
  

请帮助我们...谢谢

解决方案

查看JMF（Java Media Framework）。这将花费你一些时间
学习基础知识。那么你将能够做到这一点。我现在没有代码
样本，但据我记得你必须创建播放器，
然后从它适当的控件检索，它提供您访问
到帧。 / p>

这是一个开始的例子：
http://khemsoi.blogspot.com/2006/03/jmf-frame-grabber.html

FROM 用于创建小gif的Lib / API视频？

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;i<millis*1000;i+=1000000){
            Bitmap bitmap =           retriever.getFrameAtTime(i,FFmpegMediaMetadataRetriever.OPTION_CLOSEST);
        rev.add(bitmap);

        }   

        FileOutputStream outStream = null;
        try{
            outStream = new FileOutputStream(Environment.getExternalStorageDirectory()+ "/test.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();
     }

Please help me guys...thanks

解决方案

Take look on JMF (Java Media Framework). It will take you some time to learn basics. Then you will able to do this. I do not have a code sample with me now but as far as I remember you have to create player, then retrieve from it appropriate "control" that provides you access to frames.

Here is an example for start: http://khemsoi.blogspot.com/2006/03/jmf-frame-grabber.html

FROM Lib/API for create small gif from video?

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