android将视频文件转化为图片

 public void getBitmapsFromVideo() {        String dataPath = Environment.getExternalStorageDirectory() + "/11211015_1555.mp4";        MediaMetadataRetriever retriever = new MediaMetadataRetriever();        retriever.setDataSource(dataPath);        // 取得视频的长度(单位为毫秒)        String time = retriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_DURATION);        // 取得视频的长度(单位为秒)        int seconds = Integer.valueOf(time) / 1000;        // 得到每一秒时刻的bitmap比如第一秒,第二秒        for (int i = 1; i <= seconds; i++) {            Bitmap bitmap = retriever.getFrameAtTime(i * 1000 * 1000, MediaMetadataRetriever.OPTION_CLOSEST_SYNC);            String path = Environment.getExternalStorageDirectory() + File.separator+"_car_vedio_capture"+ File.separator + i + ".jpg";            saveBitmap(bitmap,path);        }    }

public void saveBitmap(Bitmap bm, String path) {        String dir = path.substring(0,path.lastIndexOf("/"));        File dirFile =  new File(dir);        if (!dirFile.exists()) {            dirFile.mkdirs();        }        File f = new File(path);        if (f.exists()) {            f.delete();        }        FileOutputStream out = null;        try {            out = new FileOutputStream(f);            bm.compress(Bitmap.CompressFormat.JPEG, 100, out);        } catch (FileNotFoundException e) {            e.printStackTrace();        } finally {            if (out != null) {                try {                    out.flush();                    out.close();                } catch (IOException e) {                    e.printStackTrace();                }            }        }    }

更多相关文章

随机推荐