public void getPtzAttr(string puId, int channelNo)
{
Session.Channel channel = m_session.getChannel(puId, channelNo);
if (channel == null)
{
return;
}
BVCU.ManagedLayer_CuGetPuPtzAttr(m_bvcuSdkHandle, m_session.Handle, Encoding.UTF8.GetBytes(puId),
channel.ptzIdx, m_eventHandler.onGetPtzAttr);
}