Here’s my code to fetch the frame data from BitmapLiveSouce.
private void OpenLiveSession()
{
if (_viewItemManager.Config.DeviceId != null)
{
_selectedItem = Configuration.Instance.GetItem(_viewItemManager.Config.DeviceId, Kind.Camera);
if (_selectedItem != null)
{
_bitmapLiveSource = new BitmapLiveSource(_selectedItem, BitmapFormat.YCbCr420_Planar);
_bitmapLiveSource.LiveContentEvent += BitmapLiveSourceLiveContentEvent;
_bitmapLiveSource.Width = (int)imageBox.Width;
_bitmapLiveSource.Height = (int)imageBox.Height;
_bitmapLiveSource.SetKeepAspectRatio(true, true);
_bitmapLiveSource.Init();
_bitmapLiveSource.LiveModeStart = true;
_bitmapLiveSource.SingleFrameQueue = true;
}
}
}
void BitmapLiveSourceLiveContentEvent(object sender, EventArgs e)
{
try
{
if (!Dispatcher.CheckAccess())
{
// Make sure we execute on the UI thread before updating UI Controls
Dispatcher.Invoke(new EventHandler(BitmapLiveSourceLiveContentEvent), new[] { sender, e });
}
else
{
var args = e as LiveContentEventArgs;
if (args != null)
{
if (args.LiveContent != null)
{
var bitmapContent = args.LiveContent as LiveSourceBitmapContent;
if (bitmapContent != null)
{
if (_stopLive || imageBox.Width == 0 || imageBox.Height == 0)
{
bitmapContent.Dispose();
}
else
{
int width = bitmapContent.GetPlaneWidth(0);
int height = bitmapContent.GetPlaneHeight(0);
int stride = bitmapContent.GetPlaneStride(0);
byte[] dateY = bitmapContent.GetPlaneBytes(0);
byte[] dateU = bitmapContent.GetPlaneBytes(1);
byte[] dateV = bitmapContent.GetPlaneBytes(2);
//IntPtr dataY = bitmapContent.GetPlanePointer(0);
//IntPtr dataU = bitmapContent.GetPlanePointer(1);
//IntPtr dataV = bitmapContent.GetPlanePointer(2);
int ySize = stride * height;
int uvSize = (width / 2) * (height / 2);
string filePath = "./test.yuv";
using (FileStream fileStream = new FileStream(filePath, FileMode.Append, FileAccess.Write))
{
fileStream.Write(dateY, 0, ySize);
fileStream.Write(dateU, 0, uvSize);
fileStream.Write(dateV, 0, uvSize);
}
bitmapContent.Dispose();
}
}
}
}
}
}
catch (Exception ex)
{
EnvironmentManager.Instance.ExceptionDialog("BitmapLiveSourceLiveContentEvent", ex);
}
}
The data retrieved in the above way is saved to a file, and there are two scenarios:
1. When SmartClient is in full-screen mode and only one video window is open, the obtained frame data is normal.
2. When SmartClient is not full-screen or multiple video windows are opened, the y-component of the obtained frame data is normal, and the uv-component is abnormal.
How do I get the correct YCbCr420_Planar format frame data.
