捕获到了音视频后要保存到本地文件,这是很常见的应用场景,DxPackNet保存视频文件也比较简单
用 IAviStreamWriter avi文件写入流即可
1.初始化相关设备,设定好数据捕获的回调函数
DxDeviceCollection cameras;
IDxCameraCapture camCapture;
IDxMicrophCapture microphone;
IAviStreamWriter aviWriter;
private void Form1_Load(object sender, EventArgs e)
{
cameras = DxFactory.CreateDxCompent<DxDeviceCollection>(DxDeviceCollection.ENVIRONMENT_CAMERAS);
camCapture = DxFactory.CreateDxCompent<IDxCameraCapture>(this, panel1);
camCapture.FrameCb = camerasFrameCb;
camCapture.Init(cameras[0]);
microphone = DxFactory.CreateDxCompent<IDxMicrophCapture>(100);
microphone.AudioCb = auCaptureBufferCB;
}
2.创建avi写入流 打开设备
private void button1_Click(object sender, EventArgs e)
{
button1.Enabled = false;
//创建avi文件写入流 第一个参数为-写入文件路径 第二个参数为-是否支持音频写入,true为音/视频,false为只写视频
aviWriter = DxFactory.CreateDxCompent<IAviStreamWriter>("c:\\avicaptest.avi", true);
aviWriter.Width = 640;//设置视频宽度
aviWriter.Height = 480;//设置视频高度
aviWriter.CompressType = AviVideoCompressType.MicrosoftVideo1; //设置视频压缩格式
aviWriter.Open();//打开写入流
microphone.Open();
microphone.Start();
camCapture.Run();
}
3.在回调中写入音/视频 数据
private void auCaptureBufferCB(byte[] buffer, int length)
{
//写入音频数据
aviWriter.WriteWavBuffer(buffer, length);
}
private void camerasFrameCb(byte[] buffer, int size)
{
//写入视频数据
aviWriter.WriteBmpBuffer(buffer, Math.Max(size, 640 * 480 * 3));
}
private void button2_Click(object sender, EventArgs e)
{
button2.Enabled = false;
microphone.Stop();
camCapture.Stop();
aviWriter.Dispose();//写入完了记得关闭流
aviWriter = null;
}