DirectShowLib里的例子turner，只有实时显示图像，和录视频。请问怎样在录像文件里加上音频，实时里也播放

Question

DirectShowLib里的例子turner，只有实时显示图像，和录视频。请问怎样在录像文件里加上音频，实时里也播放声音。？谢谢！ 我加了音频压缩连到输出文件 部分，但程序死机了。             //Create the file writer part of the graph. SetOutputFileName does this for us, and returns the mux and sink            IBaseFilter mux;            IFileSinkFilter sink;            hr = captureGraphBuilder.SetOutputFileName(MediaSubType.Avi, get_SaveFileName(), out mux, out sink);//textBox1.Text            DsError.ThrowExceptionForHR(hr);             //Connect the device and compressor to the mux to render the capture part of the graph            hr = captureGraphBuilder.RenderStream(PinCategory.Capture, MediaType.Video, theDevice, theCompressor, mux);//            DsError.ThrowExceptionForHR(hr);             hr = captureGraphBuilder.RenderStream(PinCategory.Capture, MediaType.Audio, theDevice, theCompressor_A, mux);//我加的            DsError.ThrowExceptionForHR(hr);//我加的