String sdcardDir = Environment.getExternalStorageDirectory().getAbsolutePath();

    String mInputStr = sdcardDir+"/DCIM/Camera/21s.mp4";
    mStrResult = "Compress begin=========\n";
    mResult.setText(mStrResult);
    VideoCompressor.compress(this, mInputStr, new VideoCompressListener() {
        @Override
        public void onSuccess(final String outputFile, String filename, long duration) {
            Worker.postMain(new Runnable() {
                @Override
                public void run() {
                    Toast.makeText(mContext,"video compress success:"+outputFile,Toast.LENGTH_SHORT).show();
                    SGLog.e("video compress success:"+outputFile);
                    mStrResult +="Compress end=========onSuccess\n";
                    mResult.setText(mStrResult);
                    mScrollView.fullScroll(View.FOCUS_DOWN);

                }
            });
        }

        @Override
        public void onFail(final String reason) {
            Worker.postMain(new Runnable() {
                @Override
                public void run() {
                    Toast.makeText(mContext,"video compress failed:"+reason,Toast.LENGTH_SHORT).show();
                    SGLog.e("video compress failed:"+reason);
                    mStrResult+="Compress end=========onFail\n";
                    mResult.setText(mStrResult);
                    mScrollView.fullScroll(View.FOCUS_DOWN);
                }
            });
        }

        @Override
        public void onProgress(final int progress) {
            Worker.postMain(new Runnable() {
                @Override
                public void run() {
                    SGLog.e("video compress progress:"+progress);
                    mStrResult += "Compress progress:"+progress +"%\n";
                    mResult.setText(mStrResult);
                    mScrollView.fullScroll(View.FOCUS_DOWN);

                }
            });
        }
    });