/// <summary> /// 开始编码 /// </summary> /// <param name="mediaInfo">目标文件的相关信息</param> /// <param name="area">欲录制的屏幕的区域</param> internal abstract void Start(MediaInfo mediaInfo, ScreenArea area);
/// <summary>
/// 开始录制
/// </summary>
/// <param name="mediaInfo"></param>
/// <param name="captureArea">捕获区域（录制的区域）</param>
internal override void Start(MediaInfo mediaInfo, ScreenArea captureArea)
{
// 设置一些必要的变量
IWMEncSourceGroupCollection sourceGroupCollection;
IWMEncSourceGroup2 sourceGroup;
IWMEncAudioSource audioSource;
IWMEncVideoSource2 vedioSource;
//IWMEncProfile2 Pro;
sourceGroupCollection = encoder.SourceGroupCollection;
sourceGroup = (IWMEncSourceGroup2)sourceGroupCollection.Add("SG_1");
// 假如 是仅音频，或者是 音频视频 全有，则添加音频设备，并进行相关设置
if (mediaInfo.AudioVedio == AudioVedioType.AudioOnly || mediaInfo.AudioVedio == AudioVedioType.Both)
{
audioSource = (IWMEncAudioSource)sourceGroup.AddSource(WMENC_SOURCE_TYPE.WMENC_AUDIO);
audioSource.SetInput("Default_Audio_Device", "DEVICE", "");
}
// 假如 是仅视频，或者是 音频视频 全有，则添加视频设备
if (mediaInfo.AudioVedio == AudioVedioType.VedioOnly || mediaInfo.AudioVedio == AudioVedioType.Both)
{
vedioSource = (IWMEncVideoSource2)sourceGroup.AddSource(WMENC_SOURCE_TYPE.WMENC_VIDEO);
vedioSource.SetInput("ScreenCapture1", "ScreenCap", "");
// 视频尺寸/显示器尺寸 缩放比
Size screenSize = SystemInformation.PrimaryMonitorSize;
float scaleX = (float)vedioSource.Height / (float)screenSize.Height;
float scaleY = (float)vedioSource.Width / (float)screenSize.Width;
// 设置左边和上部剪裁区
vedioSource.CroppingLeftMargin = (int)((float)captureArea.X * scaleY);
vedioSource.CroppingTopMargin = (int)((float)captureArea.Y * scaleX);
// 设置右边和下部剪裁区
int bottomMargin = screenSize.Height - captureArea.Height - captureArea.Y;
int rightMargin = screenSize.Width - captureArea.Weight - captureArea.X;
vedioSource.CroppingRightMargin = (int)((float)bottomMargin * scaleY);
vedioSource.CroppingBottomMargin = (int)((float)rightMargin * scaleX);
}
// 设置压缩方式
// 首先必须刷新一下信息
IWMEncSourcePluginInfoManager sourcePluginInfoManager = encoder.SourcePluginInfoManager;
sourcePluginInfoManager.Refresh();
IWMEncProfileCollection wpfc = encoder.ProfileCollection;
// 将压缩方式的名称添加进 profileNames 变量,将压缩方式对象本身添加到profiles 变量
for (int i = 0; i < wpfc.Count; i++)
{
if (mediaInfo.ProfileName == wpfc.Item(i).Name)
{
sourceGroup.set_Profile(wpfc.Item(i));
break;
}
}
// 设置存放位置
encoder.File.LocalFileName = mediaInfo.SavePath;
// 启动
encoder.Start();
}
public void Start(MediaInfo mediaInfo, ScreenArea area)
{
_encoder.Start(mediaInfo, area);
}
