Dev Center
How to rotate video
This KB is for Dynamic .NET TWAIN v7.x and higher only.
Dynamic .NET TWAIN offers an event named OnFrameCaptrue which is triggered when a frame is captured by the camera. You can set some preview features with that.
Following is the sample code for rotating the video:
private void Rotate_Click(object sender, EventArgs e)
{
m_CurrentCamera.RotateVideo(Dynamsoft.UVC.Enums.EnumVideoRotateType.Rotate_180);
m_CurrentCamera.OnFrameCaptrue += M_CurrentCamera_OnFrameCaptrue;
}
int i = 0;
private void SetPicture(Image img)
{
Bitmap temp = ((Bitmap)(img)).Clone(new Rectangle(0, 0, img.Width, img.Height), img.PixelFormat);
if (pictureBox2.InvokeRequired)
{
pictureBox2.BeginInvoke(new MethodInvoker(
delegate ()
{
pictureBox2.Image = temp;
if (i == 0)
{
m_ImageCore.IO.LoadImage(temp);
i++;
}
}));
}
else
{
pictureBox2.Image = temp;
}
}
private void M_CurrentCamera_OnFrameCaptrue(Bitmap bitmap)
{
SetPicture(bitmap);
//pictureBox2.Image = bitmap; // If you use this API directly, the app will throw an exception.
}
You can also set other customized settings like adding grids.
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