实现视频录制功能鸿蒙示例代码 原创

let cameraManager: camera.CameraManager = camera.getCameraManager(context);
1.

let cameraArray: Array<camera.CameraDevice> = cameraManager.getSupportedCameras();
1.

let sceneModes: Array<camera.SceneMode> = cameraManager.getSupportedSceneModes(cameraArray[0]);
1.

let cameraInput: camera.CameraInput = cameraManager.createCameraInput(cameraArray[0]);
1.

let previewOutput: camera.PreviewOutput = cameraManager.createPreviewOutput(previewProfilesArray[0], surfaceId);
1.

let avRecorder: media.AVRecorder = await media.createAVRecorder();
let videoSurfaceId = await avRecorder.getInputSurface();
1.
2.

let aVRecorderProfile: media.AVRecorderProfile = {
fileFormat : media.ContainerFormatType.CFT_MPEG_4, // 视频文件封装格式，只支持MP4
videoBitrate : 100000, // 视频比特率
videoCodec : media.CodecMimeType.VIDEO_AVC, // 视频文件编码格式，支持avc格式
videoFrameWidth : 640,  // 视频分辨率的宽
videoFrameHeight : 480, // 视频分辨率的高
videoFrameRate : 30 // 视频帧率
};
1.
2.
3.
4.
5.
6.
7.
8.

let aVRecorderConfig: media.AVRecorderConfig = {
videoSourceType: media.VideoSourceType.VIDEO_SOURCE_TYPE_SURFACE_YUV,
profile: aVRecorderProfile,
url: "fd://" + file.fd,//获取文件的fd,且创建的文件要有读写权限
rotation: 90 // 90°为默认竖屏显示角度，如果由于设备原因或应用期望以其他方式显示等原因，请根据实际情况调整该参数
};
1.
2.
3.
4.
5.
6.

// 创建avRecorder
let avRecorder: media.AVRecorder = await media.createAVRecorder();
// avRecorder准备
avRecorder.prepare(aVRecorderConfig);
// 创建VideoOutput对象
let videoOutput: camera.VideoOutput | undefined = undefined;
// createVideoOutput传入的videoProfile对象的宽高需要和aVRecorderProfile保持一致。
let videoProfile: undefined | camera.VideoProfile = videoProfilesArray.find((profile: camera.VideoProfile) => {
return profile.size.width === aVRecorderProfile.videoFrameWidth && profile.size.height === aVRecorderProfile.videoFrameHeight;
});
videoOutput = cameraManager.createVideoOutput(videoProfile, videoSurfaceId);
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.

//创建会话
let videoSession: camera.CaptureSession | undefined = undefined;
videoSession.beginConfig();
// 向会话中添加相机输入流
videoSession.addInput(cameraInput);
// 向会话中添加预览输出流
videoSession.addOutput(previewOutput);
// 向会话中添加录像输出流
videoSession.addOutput(videoOutput);
// 提交会话配置
videoSession.commitConfig();
// 启动会话
videoSession.start();
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.

// 启动录像输出流
videoOutput.start()
// 开始录像
avRecorder.start();
// 停止录像
avRecorder.stop();
1.
2.
3.
4.
5.
6.

// 停止当前会话
videoSession.stop();
// 释放相机输入流
cameraInput.close();
// 释放预览输出流
previewOutput.release();
// 释放录像输出流
videoOutput.release();
// 释放会话
videoSession.release();
// 会话置空
videoSession = undefined;
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.