/// <summary>
/// 在视频播放时并按下暂停按钮，进行视频截图
/// </summary>
/// <param name="FileName"></param>
/// <param name="ImgFormat"></param>
public Image GetImage()
{
Image img = null;
if (des != null && PlayState == PlayState.Pause)
{
img = des.GetImage();
}
return(img);
}
public void Generate()
{
Check.Require(Layers, "Layers", Check.NotNull);
Check.Require(Layers.Count, "Layers.Count", Check.GreaterThan <int>(0));
Check.Require(Tick, "Tick", Check.GreaterThanOrEqual <int>(0));
ILog _log = LogManager.GetLogger(typeof(IOHelper));
Layers.Sort(new SortComparer <Layer>("Level", false));
var DynamicTextDS = Layers.FindAll(item => item.LayerType == LayerType.DynamicText);
if (Layers.Count == 0)
{
//TODO:
var img = new Bitmap(Layers.VideoSize.Width, Layers.VideoSize.Height);
using (var g = Graphics.FromImage(img))
{
g.Clear(Layers.BackColor);
}
NailImage = img;
return;
}
var des = new DESCombine(DESConsts.FPS, DESConsts.BitCount, Layers.VideoSize.Width, Layers.VideoSize.Height, Layers);
{
int MaxCount = Tick <= 0 ? DESConsts.BitCount : (int)Tick * DESConsts.BitCount;
ManualResetEvent mre = new ManualResetEvent(false);
bool hasSign = false;
try
{
Control.CheckForIllegalCrossThreadCalls = false;
Panel pnl = new Panel();
var callback = new DESVideoCallBack();
EventHandler onCompleted = delegate
{
if (des != null)
{
des.Dispose();
}
Control.CheckForIllegalCrossThreadCalls = true;
if (!hasSign)
{
hasSign = true;
mre.Set();
}
};
callback.OnCallBack = () =>
{
try
{
if (callback.m_FrameCount == 5)
{
des.Pause();
hasSign = true;
mre.Set();
}
}
catch (Exception e)
{
_log.Error("Generale ThumNail Exception on callBack.", e);
_log.Error(e);
}
};
des.Completed += onCompleted;
pnl.Width = Layers.VideoSize.Width;
pnl.Height = Layers.VideoSize.Height;
des.RenderToFrame(pnl, callback, null, DynamicTextDS, DsRect.FromRectangle(ClientRectangle), 0, Layers.PlayLength);
des.StartRendering();
des.put_CurrentPosition(Tick);
mre.WaitOne();
mre.Close();
if (des != null && !des.IsDisposed)
{
NailImage = des.GetImage();
des.Cancel();
}
}
catch (Exception e)
{
_log.Error("Generale ThumNail Exception on general.", e);
_log.Error(e);
des.Cancel();
}
}
}
public void Generate()
{
Check.Require(Layers, "Layers", Check.NotNull);
Check.Require(Layers.Length, "Layers.Length", Check.GreaterThan <int>(0));
Check.Require(HWnd, "HWnd", Check.NotNull);
Check.Require(Tick, "Tick", Check.GreaterThanOrEqual <int>(0));
var layers = helper.PopulateDataBatchLoad(Layers);
layers.BackColor = HWnd.BackColor;
//layers.VideoSize = new Size(ControlService.SignCombo.Current.Width, ControlService.SignCombo.Current.Height);
layers.VideoSize = HWnd.Size;
layers.Sort(new SortComparer <Layer>("Level", false));
var DynamicTextDS = layers.FindAll(item => { return(item.LayerType == LayerType.DynamicText); });
if (layers.Count == 0)
{
//TODO:
var img = new Bitmap(HWnd.Width, HWnd.Height);
using (var g = Graphics.FromImage(img))
{
g.Clear(HWnd.BackColor);
}
NailImage = img;
return;
}
//using (var des = new DESCombine(DESConsts.FPS, DESConsts.BitCount, HWnd.Width, HWnd.Height, layers))
var des = new DESCombine(DESConsts.FPS, DESConsts.BitCount, layers.VideoSize.Width, layers.VideoSize.Height, layers);
{
int MaxCount = Tick <= 0 ? DESConsts.BitCount : (int)Tick * DESConsts.BitCount;
ManualResetEvent mre = new ManualResetEvent(false);
bool hasSign = false;
try
{
Control.CheckForIllegalCrossThreadCalls = false;
Panel pnl = new Panel();
var callback = new DESVideoCallBack();
EventHandler onCompleted = delegate
{
if (des != null)
{
des.Dispose();
}
Control.CheckForIllegalCrossThreadCalls = true;
if (!hasSign)
{
hasSign = true;
mre.Set();
}
};
callback.OnCallBack = () =>
{
try
{
if (callback.m_FrameCount == 5)
{
des.Pause();
hasSign = true;
mre.Set();
}
}
catch
{
}
};
des.Completed += onCompleted;
pnl.Width = layers.VideoSize.Width;
pnl.Height = layers.VideoSize.Height;
des.RenderToFrame(pnl, callback, null, DynamicTextDS, DsRect.FromRectangle(HWnd.ClientRectangle), 0, layers.PlayLength);
des.StartRendering();
des.put_CurrentPosition(Tick);
mre.WaitOne();
mre.Close();
if (des != null && !des.IsDisposed)
{
NailImage = des.GetImage();
des.Cancel();
}
}
catch
{
des.Cancel();
}
}
}
