C#实现摄像头视频录制与保存
C#实现摄像头视频录制与保存，包含系统原生API和第三方库两种实现方式
一、使用Windows Media Capture API（原生方案）
using Windows.Media.Capture;
using Windows.Media.MediaProperties;
using Windows.Storage;
using System.Threading.Tasks;public class VideoRecorder
{private MediaCapture _mediaCapture;private StorageFile _outputFile;private bool _isRecording = false;// 初始化摄像头public async Task InitializeAsync(){_mediaCapture = new MediaCapture();var settings = new MediaCaptureInitializationSettings{StreamingCaptureMode = StreamingCaptureMode.Video};await _mediaCapture.InitializeAsync(settings);}// 开始录制public async Task StartRecordingAsync(string fileName){if (_isRecording) return;_outputFile = await KnownFolders.VideosLibrary.CreateFileAsync(fileName, CreationCollisionOption.GenerateUniqueName);var encodingProfile = MediaEncodingProfile.CreateMp4(VideoEncodingQuality.Auto);await _mediaCapture.StartRecordToStorageFileAsync(encodingProfile, _outputFile);_isRecording = true;}// 停止录制public async Task StopRecordingAsync(){if (!_isRecording) return;await _mediaCapture.StopRecordAsync();_isRecording = false;_mediaCapture.Dispose();}
}// 使用示例
var recorder = new VideoRecorder();
await recorder.InitializeAsync();
await recorder.StartRecordingAsync("my_video.mp4");
// 执行其他操作...
await recorder.StopRecordingAsync();
二、使用AForge.NET第三方库
using AForge.Video;
using AForge.Video.DirectShow;
using System.Drawing;
using System.IO;public class AForgeRecorder
{private VideoCaptureDevice _videoSource;private AVIWriter _aviWriter;private bool _isRecording = false;// 初始化摄像头public void Initialize(){FilterInfoCollection devices = new FilterInfoCollection(FilterCategory.VideoInputDevice);if (devices.Count == 0)throw new Exception("未检测到摄像头设备");_videoSource = new VideoCaptureDevice(devices[0].MonikerString);_videoSource.VideoResolution = _videoSource.VideoCapabilities[0]; // 选择最高分辨率}// 开始录制public void StartRecording(string fileName){_aviWriter = new AVIWriter("WMV", _videoSource.VideoResolution.FrameWidth,_videoSource.VideoResolution.FrameHeight);_videoSource.NewFrame += (sender, e) => {_aviWriter.WriteVideoFrame(e.Frame);};_videoSource.Start();_isRecording = true;}// 停止录制public void StopRecording(){if (!_isRecording) return;_videoSource.SignalToStop();_aviWriter.Close();_isRecording = false;}
}// 使用示例
var recorder = new AForgeRecorder();
recorder.Initialize();
recorder.StartRecording("recorded_video.avi");
// 执行其他操作...
recorder.StopRecording();
三、关键参数配置
| 参数项 | 原生方案配置方法 | AForge方案配置方法 |
|---|---|---|
| 视频分辨率 | MediaCaptureInitializationSettings中的VideoDeviceController | VideoCaptureDevice.VideoResolution |
| 帧率 | MediaCaptureInitializationSettings中的MaxFrameRate | VideoCaptureDevice.DefaultFrameRate |
| 编码格式 | MediaEncodingProfile指定视频编码类型 | AVIWriter构造函数指定编码格式 |
| 保存路径 | KnownFolders指定系统文件夹 | 自定义文件路径 |
四、高级功能实现
1. 实时预览窗口
// 原生方案预览
public async Task StartPreviewAsync()
{var previewWindow = new CaptureElement();previewWindow.Source = _mediaCapture;await _mediaCapture.StartPreviewAsync();
}// AForge方案预览
public void StartPreview(Control control)
{control.Controls.Add(new PictureBox {Image = _videoSource.GetCurrentVideoFrame(),Dock = DockStyle.Fill});
}
2. 视频压缩设置
// 原生方案H.264压缩
var profile = MediaEncodingProfile.CreateMp4(VideoEncodingQuality.Highest);
profile.Video.Codec = VideoCodec.H264;// AForge方案调整码率
AVIWriter writer = new AVIWriter("WMV", width, height);
writer.VideoStreamInfo.Bitrate = 2000000; // 2Mbps
五、异常处理与资源管理
public class SafeRecorder : IDisposable
{private bool _disposed = false;// 原生方案资源释放public void Dispose(){if (!_disposed){_mediaCapture?.Dispose();_disposed = true;}}// AForge方案资源释放public void SafeStop(){try{_videoSource?.SignalToStop();_aviWriter?.Close();}catch (Exception ex){// 记录日志}}
}
参考代码 c#调用本地摄像头录制视频并保存 www.youwenfan.com/contentcsj/59163.html
六、完整项目结构
VideoRecorderApp/
├── src/
│ ├── VideoRecorder.sln
│ ├── NativeRecorder/ (原生方案实现)
│ │ ├── MainPage.xaml
│ │ └── VideoService.cs
│ └── AForgeRecorder/ (第三方方案实现)
│ ├── RecorderForm.cs
│ └── VideoProcessor.cs
├── assets/
│ └── default_icon.png
└── docs/└── 开发指南.md