Reset EncoderParam failed(return MFX_ERR_INVALID_VIDEO_PARAM)

[Jetsen_W_]

I used MSDK 2013 R3 for Linux on Ubuntu 1204.

I wanted to change the bitrate in encoding, when I use the Reset function, I got the error code(-15)

int VideoEncoderIntel::ChangeVideoBitrate(uint16_t bitrate_kb) {
    mfxStatus sts = MFX_ERR_NONE;

    while (MFX_ERR_NONE <= sts && MFX_ERR_MORE_DATA != sts) {
        sts = FlushEncoder();
        if (MFX_ERR_NONE == sts) {
           .... handle packet....          
        } else if (MFX_ERR_MORE_DATA == sts) {

            mfxVideoParam oldParam;
            memset(&oldParam, 0, sizeof(oldParam));
            mfxStatus status = m_pmfxENC->GetVideoParam(&oldParam);
            MSDK_CHECK_RESULT(sts, MFX_ERR_NONE, status);
            oldParam.mfx.TargetKbps = bitrate_kb;

            sts = m_pmfxENC->Reset(&oldParam);
            MSDK_CHECK_RESULT(sts, MFX_ERR_NONE, sts);
            break;
        }
    }

    return sts;
}

mfxStatus VideoEncoderIntel::FlushEncoder() {
    mfxStatus sts = MFX_ERR_NONE;

//    while (MFX_ERR_NONE <= sts)
    for (;;) {
        sts = m_pmfxENC->EncodeFrameAsync(NULL, NULL, &m_mfxBS, &m_mfxEncSyncp);

        if (MFX_ERR_NONE < sts && !m_mfxEncSyncp) // Repeat the call if warning and no output
        {
            if (MFX_WRN_DEVICE_BUSY == sts)   {
                u::Log::write(get_log_file(), "Busy!\n");
                usleep(1000); // Wait if device is busy, then repeat the same call
            }
        }
        else if (MFX_ERR_NONE < sts && m_mfxEncSyncp)
        {
            sts = MFX_ERR_NONE; // Ignore warnings if output is available
            break;
        }
        else if (MFX_ERR_NOT_ENOUGH_BUFFER == sts)
        {
            // Allocate more bitstream buffer memory here if needed...
            sts = AllocateSufficientBuffer(&m_mfxBS);
            MSDK_CHECK_RESULT(sts, MFX_ERR_NONE, sts);
        }
        else if (MFX_ERR_MORE_DATA == sts)
        {
//            printf("MORE DATA!\n");
            break;
        } else
        {
            break;
        }
    }
    if(MFX_ERR_NONE == sts)
    {
        sts = m_mfxSession.SyncOperation(m_mfxEncSyncp, 60000); // Synchronize. Wait until encoded frame is ready
        MSDK_CHECK_RESULT(sts, MFX_ERR_NONE, sts);
    }

    return sts;

}

Is there anything wrong?

[Jetsen_W_]

I turn off NalHrdConformance in my program(NalHrdConformance = MFX_CODINGOPTION_OFF), and Reset() function return success, but the output stream seems contain the old bitrate in CBR mode, as described in this topic

http://software.intel.com/en-us/forums/topic/505598