我用vmr9渲染视频，media encoder 9录制，为什么每次都只能录几分钟 返回值为负数

[nb009网]

BYTE* pBuffer = NULL;

HRESULT hr;
INSSBuffer * pSample = NULL;
hr = mWriter->AllocateSample(arg->widthstep * arg->height, &pSample);

hr = pSample->GetBuffer(&pBuffer);
for( int i=0 ; i < arg->height ; i++)
{
memcpy((BYTE*) pBuffer +( arg->height - i - 1) *
arg->widthstep ,
(BYTE*) arg->pixs + i* arg->widthstep ,
arg->widthstep);
}
hr = pSample->SetLength(arg->widthstep * arg->height);
DWORD flags = WM_SF_CLEANPOINT;
hr = mWriter->WriteSample(1,GetTimeStamp(), flags, pSample);在这里几分钟之后返回值为负数

时间戳是以系统时间作为参考时间

[nb009网]

求高手，自己顶一下，是不是觉得分数太少了，没办法我就这么多分了，请高手指点一下

[msdn2100]

对照Return code

[msdn2100]

E_INVALIDARG The dwInputNum value is greater than the highest index number. E_UNEXPECTED The method failed for an unspecified reason.

[xxfzy2010]

我也遇到同样的问题，望高手解答