(C#)DirectShow播放wmv、avi格式的视频解码回调

--------------------------------------------------------------------- DxScan While the underlying libraries are covered by LGPL, this sample is released as public domain. It is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. --------------------------------------------------------------------- A sample application scanning a media file looking for black frames To call it, you basically need: Capture cam; cam = new Capture(@"C:\foo.mpg"); cam.Start(); cam.m_Count is the number of frames cam.m_Blacks is how many black frames Most of the work is done in ISampleGrabberCB.BufferCB. See the comments there. Also, the algorithm used to scan for black frames isn't as efficient as it could be. However, the samples gives you an idea of how this could be done.