七牛短視頻錄製時截幀（抓拍）處理

  public void onCaptureFrame(View v) {
        mShortVideoRecorder.captureFrame(new PLCaptureFrameListener() {
            @Override
            public void onFrameCaptured(PLVideoFrame capturedFrame) {
                if (capturedFrame == null) {
                    Log.e(TAG, "capture frame failed");
                    return;
                }

                Log.i(TAG, "captured frame width: " + capturedFrame.getWidth() + " height: " + capturedFrame.getHeight() + " timestamp: " + capturedFrame.getTimestampMs());
                try {
                    FileOutputStream fos = new FileOutputStream(Config.CAPTURED_FRAME_FILE_PATH);
                    capturedFrame.toBitmap().compress(Bitmap.CompressFormat.JPEG, 100, fos);
                    fos.close();
                    runOnUiThread(new Runnable() {
                        @Override
                        public void run() {
                            ToastUtils.s(VideoRecordActivity.this, "截幀已保存到路徑：" + Config.CAPTURED_FRAME_FILE_PATH);
                        }
                    });
                } catch (FileNotFoundException e) {
                    e.printStackTrace();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        });
    }