How to get transcode calc DecodingTimeStamp, TimeStamp?

[parksh]

Hello!

sample_multi_transcode(https://github.com/oneapi-src/oneVPL/blob/master/tools/legacy/sample_multi_transcode)

Debugging the sample code above PutBS() function call -> sts = m_pmfxSession->SyncOperation(pBitstreamEx->Syncp, GetSyncOpTimeout());
pBitstreamEx->Bitstream.Decode TimeStamp, pBitstreamEx->Bitstream.TimeStamp values ​​are returned

However, in software applications based on sample_multi_transcode, DecodingTimeStamp and TimeStamp values ​​are always returned as 0.

sts = m_pmfxDEC->Init(&m_mfxDecParams);
sts = m_pmfxVPP->Init(&m_mfxVppParams);
sts = m_pmfxENC->Init(&m_mfxEncParams);

&m_mfxDecParams, m_mfxVppParams, and m_mfxEncParams parameter values ​​all match

What processing should I do additionally to get DecodingTimeStamp and TimeStamp?

https://github.com/oneapi-src/oneVPL/blob/master/tools/legacy/sample_multi_transcode/src/pipeline_transcode.cpp
mfxStatus CTranscodingPipeline::PutBS() {
mfxStatus sts = MFX_ERR_NONE;
ExtendedBS* pBitstreamEx = m_BSPool.front();
MSDK_CHECK_POINTER(pBitstreamEx, MFX_ERR_NULL_PTR);

// get result coded stream, synchronize only if we still have sync point
if (pBitstreamEx->Syncp) {
m_ScalerConfig.Tracer->BeginEvent(SMTTracer::ThreadType::ENC,
TargetID,
SMTTracer::EventName::SYNC,
pBitstreamEx->Syncp,
nullptr);
sts = m_pmfxSession->SyncOperation(pBitstreamEx->Syncp, GetSyncOpTimeout());

m_ScalerConfig.Tracer->EndEvent(SMTTracer::ThreadType::ENC,
TargetID,
SMTTracer::EventName::SYNC,
pBitstreamEx->Syncp,
nullptr);
m_ScalerConfig.Tracer->AfterEncodeSync();
HandlePossibleGpuHang(sts);
MSDK_CHECK_ERR_NONE_STATUS(sts, MFX_ERR_ABORTED, "Encode: SyncOperation failed");
if (m_pSurfaceUtilizationSynchronizer && m_MemoryModel != GENERAL_ALLOC) {
m_pSurfaceUtilizationSynchronizer->NotifyFreeCome();
}
}

m_nOutputFramesNum++;

msdk_stringstream ss;
ss << MSDK_STRING("[framenum: ") << m_nOutputFramesNum << MSDK_STRING(", ")
<< MSDK_STRING("frametype: ") << pBitstreamEx->Bitstream.FrameType << MSDK_STRING("] ")
<< MSDK_STRING("DTS: ") << pBitstreamEx->Bitstream.DecodeTimeStamp << MSDK_STRING(", ")
<< MSDK_STRING("PTS: ") << pBitstreamEx->Bitstream.TimeStamp
<< std::endl;

msdk_printf(MSDK_STRING("%s"), ss.str().c_str());

//--- Time measurements
if (statisticsWindowSize) {
outputStatistics.StopTimeMeasurementWithCheck();
outputStatistics.StartTimeMeasurement();
}

m_ScalerConfig.Tracer->BeginEvent(SMTTracer::ThreadType::ENC,
TargetID,
SMTTracer::EventName::WRITE_BS,
nullptr,
nullptr);
if (!m_ScalerConfig.ParallelEncodingRequired) {
sts = m_pBSProcessor->ProcessOutputBitstream(&pBitstreamEx->Bitstream);
}
else {
sts = m_pBSProcessor->ProcessOutputBitstream(&pBitstreamEx->Bitstream,
TargetID,
m_nOutputFramesNum);
}
m_ScalerConfig.Tracer->EndEvent(SMTTracer::ThreadType::ENC,
TargetID,
SMTTracer::EventName::WRITE_BS,
nullptr,
nullptr);
MSDK_CHECK_STATUS(sts, "m_pBSProcessor->ProcessOutputBitstream failed");

UnPreEncAuxBuffer(pBitstreamEx->pCtrl);

pBitstreamEx->Bitstream.DataLength = 0;
pBitstreamEx->Bitstream.DataOffset = 0;

if (m_BSPool.size())
m_BSPool.pop_front();
m_pBSStore->Release(pBitstreamEx);

mfxU16 FrameTYpe = pBitstreamEx->Bitstream.FrameType;

return sts;
} //mfxStatus CTranscodingPipeline::PutBS()

CPU : i7-11700
OS : Windows 10 Pro for Workstations
API version : 2.3
oneVPL version : master version(2023.2.1)
libmfx64-gen.dll
- File Version : 11.21.6.24
- Product Version : 11.0.0.004

Thanks in advance for your reply.

[AthiraM_Intel]

Hi,

Thank you for posting in Intel Communities.

Could you please share the sample reproducer code which has your modifications and the exact steps you followed?

Thanks

[parksh]

I'm sorry

The timestamp initalization part was missing in the code I modified.

By adding the code below, I was able to get the TimeStamp value returned.

FileBitstreamProcessor::FileBitstreamProcessor() {
    MSDK_ZERO_MEMORY(m_Bitstream);
    ===> m_Bitstream.TimeStamp = (mfxU64)-1;
} // FileBitstreamProcessor::FileBitstreamProcessor()

Thanks

[AthiraM_Intel]

Hi,

Glad to know that your issue is resolved. Thanks for sharing the solution with us. If you need any additional information, please post a new question as this thread will no longer be monitored by Intel.

Thanks