从零开发一款相机APP 第九篇: Camera2相机 录像功能实现

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Surface recorderSurface = mMediaRecorder.getSurface();
surfaces.add(recorderSurface);
mPreviewBuilder.addTarget(recorderSurface);

mCameraDevice.createCaptureSession(surfaces, new CameraCaptureSession.StateCallback() {
                @Override
                public void onConfigured(@NonNull CameraCaptureSession cameraCaptureSession) {
                    mPreviewSession = cameraCaptureSession;
                    updatePreview();
                    getActivity().runOnUiThread(new Runnable() {
                        @Override
                        public void run() {
                            // Start recording
                            mMediaRecorder.start();
                        }
                    });
                }
}

//1) 创建MediaRecorder对象
mMediaRecorder = new MediaRecorder();

//2) 设置Audio数据来源，这里设置来自MIC
mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);

//3) 设置Video数据来源，这里设置来自SURFACE
mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.SURFACE);

//4) 设置录像格式
mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);

//5) 创建录像文件路径，这里是绝对路径
if (mNextVideoAbsolutePath == null || mNextVideoAbsolutePath.isEmpty()) {
	mNextVideoAbsolutePath = getVideoFilePath(getActivity());
}
//6) 设置文件路径
mMediaRecorder.setOutputFile(mNextVideoAbsolutePath);

//7）设置录像编码码率,这里是10M
mMediaRecorder.setVideoEncodingBitRate(10000000);

//8) 设置录像帧率
mMediaRecorder.setVideoFrameRate(30);

//9) 设置录像分辨率
mMediaRecorder.setVideoSize(mVideoSize.getWidth(), mVideoSize.getHeight());

//10) 设置录像编码格式
mMediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264);

//11) 设置录音编码格式
mMediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);

//12) 设置视频方向
mMediaRecorder.setOrientationHint(DEFAULT_ORIENTATIONS.get(rotation));

//13) prepare并开始录像
mMediaRecorder.prepare();
mMediaRecorder.start();

//14) 停止并释放录像
mMediaRecorder.stop();
mMediaRecorder.reset();