If I receive bytes in socket and then wrap it to IMFSample then I can not set the sampleTime right?

• 1.in SOCKET SERVER read h264 data and send it to SOCKET CLIENT
• 2. in SOCKET CLIENT recv the bytes and create IMFSample.
• 3.ProcessInput

but the receive buffer length is 3096(or other) and the lenght of a sample is others.
I do not know the sample’s time.

while(true){
    char buf[3096]={0};
memset(buffer,0,3096);
    int bytes=recv(socket,buf,3096,0);
    IMFSample *sample=NULL;
    hr=MFCreateSample(&sample);
    sample.SetSampleDuration(duration);
    IMFMediaBuffer* buffer=NULL;
    hr=MFCreateMemoryBuffer(bytes,&buffer);
    sample.AddBuffer(buffer);
    BYTE*ppBuffer;
    DWORD pcbMaxLength=0,pcbCurrentLength=0;
    buffer.Lock(&ppBuffer,&pcbMaxLength,&pcbCurrentLength);
    memcpy_s(ppBuffer,bytes,buffer,bytes);
    buffer.Unlock();
    buffer.SetCurrentLength(bytes);
    hr=transform.ProcessInput(0,sample,0);
}

the hr is S_OK;

    while(true){
    if(sampleSize){
    IMFMediaBuffer*buffer1=NULL;
    hr = MFCreateMemoryBuffer(static_cast<DWORD>(sampleSize.load()), &buffer1);
    if (FAILED(hr)) {
        sample1->Release();
        sample1 = NULL;
        break;
    }
    sample1->AddBuffer(buffer1)
    }
        DOWRD sampleSize=0;
    
        MFT_OUTPUT_DATA_BUFFER outputDataBuffer{ 0,sample1 };
        DWORD status = 0;
        auto const processOutput = transform_->ProcessOutput(0, 1, &outputDataBuffer, &status);
     if(processOutput==MF_E_TRANSFORM_STREAM_CHANGE){
//set mediaType and get sampleSize.
}
    hr = sample1->ConvertToContiguousBuffer(&buffer1);
        }

processOutput is S_OK but hr=buffer1.GetCurrentLength(&currLength); returns S_OK but currLength is 0;