Question

我正在Android Studio上创建一个应用程序，在该应用程序中，用户可以在录制视频时选择要应用的各种帧，如下所示：

录制视频时，很容易“模拟”这种效果，因为我要做的就是将ImageView放在TextureView上（相机预览显示在ImageView上）。但是，我不知道在录制视频时如何应用选定的帧。

我相信这类似于在Instagram故事上添加图片之类的东西，但是我找不到相关的代码或教程。

这是Java源文件中处理记录的部分：

private void startRecord(){
        try {
            setupMediaRecorder();
            SurfaceTexture surfaceTexture = mTextureView.getSurfaceTexture();
            surfaceTexture.setDefaultBufferSize(mPreviewSize.getWidth(), mPreviewSize.getHeight());
            Surface previewSurface = new Surface(surfaceTexture);
            Surface recordSurface = mMediaRecorder.getSurface();
            mCaptureRequestBuilder = mCameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_RECORD);
            mCaptureRequestBuilder.addTarget(previewSurface);
            mCaptureRequestBuilder.addTarget(recordSurface);
            mCameraDevice.createCaptureSession(Arrays.asList(previewSurface, recordSurface),
                    new CameraCaptureSession.StateCallback() {
                        @Override
                        public void onConfigured(CameraCaptureSession session) {
                            mRecordCaptureSession = session;
                            try{mRecordCaptureSession.setRepeatingRequest(
                                    mCaptureRequestBuilder.build(),null,null
                            );} catch(CameraAccessException e){
                                e.printStackTrace();
                            }
                        }

                        @Override
                        public void onConfigureFailed(CameraCaptureSession session) {
                            //Log.d(TAG,"onConfigurationFailed: startRecord");
                        }
                        @Override
                        public void onClosed(CameraCaptureSession session ){
                            super.onClosed(session);
                            startPreview();
                        }
                    }, null);
        } catch(Exception e){
            e.printStackTrace();
        }
    }
    private void startPreview(){
        SurfaceTexture surfaceTexture = mTextureView.getSurfaceTexture();
        surfaceTexture.setDefaultBufferSize(mPreviewSize.getWidth(),mPreviewSize.getHeight());
        Surface previewSurface = new Surface(surfaceTexture);
        try {
            mCaptureRequestBuilder = mCameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_PREVIEW);
            mCaptureRequestBuilder.addTarget(previewSurface);

            mCameraDevice.createCaptureSession(Arrays.asList(previewSurface), new CameraCaptureSession.StateCallback() {
                @Override
                public void onConfigured(CameraCaptureSession session) {
                    Log.d(TAG, "PS");
                    try {
                        session.setRepeatingRequest(mCaptureRequestBuilder.build(), null, mBackgroundHandler);
                    } catch(CameraAccessException e){
                        e.printStackTrace();
                    }
                }

                @Override
                public void onConfigureFailed(CameraCaptureSession session) {
                    Toast.makeText(getApplicationContext(), "Unable to setup camera preview",Toast.LENGTH_SHORT).show();
                }
                @Override
                public void onClosed(CameraCaptureSession session ){
                    super.onClosed(session);
                    Log.d(TAG,"PC");
                }
            }, null);

        } catch(CameraAccessException e){
            e.printStackTrace();
        }
    }

    private void setupMediaRecorder() throws IOException{
        mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.SURFACE);
        mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
        mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
        mMediaRecorder.setOutputFile(mVideoFileName);
        mMediaRecorder.setVideoEncodingBitRate(1000000);
        mMediaRecorder.setVideoFrameRate(30);
        mMediaRecorder.setVideoSize(mVideoSize.getWidth(),mVideoSize.getHeight());
        mMediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264);
        mMediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);
        mMediaRecorder.setOrientationHint(mTotalRotation);
        mMediaRecorder.prepare();
    }

这是Java源文件中保存的部分：

private void createVideoFolder(){
        File movieFile = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_MOVIES);
        mVideoFolder = new File(movieFile, "OneanOne");
        if(!mVideoFolder.exists()){
            mVideoFolder.mkdirs();
        }
    }

    private File createVideoFileName() throws IOException {
        String timestamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
        String prepend = "VIDEO_"+timestamp+"_";
        File videoFile = File.createTempFile(prepend,".mp4",mVideoFolder);
        mVideoFileName = videoFile.getAbsolutePath();
        return videoFile;
    }

这是xml（以防万一这也很重要）：

<TextureView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/textureView"
        android:layout_alignParentTop="true"
        android:layout_alignParentStart="true"
        android:layout_alignParentLeft="true"/>

    <ImageView
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:scaleType="fitXY"
        android:src="@drawable/frame1"

        ></ImageView>

我将如何实现这种效果？提前非常感谢。

在Android应用的自定义相机（如Instagram Stories）上向录制的视频添加图片吗？

0 个答案: