private void TestMediaTimes()
{
int hr;
long i, i2;
const long start = 1000;
const long stop = 2000;
hr = m_pSource1Src.SetMediaTimes(start, stop);
DESError.ThrowExceptionForHR(hr);
hr = m_pSource1Src.GetMediaTimes(out i, out i2);
DESError.ThrowExceptionForHR(hr);
Debug.Assert(i == start && i2 == stop, "MediaTimes");
}