transcode_demo

DecodePreInit(); VPPPreInit();PreEncPreInit()； EncodePreInit();

CTranscodingPipeline.transcode()

pPipeline-Run()

m_pmfxSession-InitEx(initPar)

m_parser.ParseCmdLine();

EncodeOneFrame();

Launcher transcode;

m_pBSStore-GetNext();

pBSProcessor-PrepareBitstream();

CTranscodingPipeline

Launcher::Init

transcode

m_pmfxDEC-Init();m_pmfxVPP-Init();m_pmfxPreENC-Init();m_pmfxENC-Init();

transcode.Run();

RunFrameVPPAsync()

pParentPipeline-Join(m_pmfxSession.get());

m_pmfxSession-QueryIMPL();

m_pmfxSession-SetFrameAllocator(m_pMFXAllocator);

ThranscodeRoutine

CreateSafetyBuffers();// each pair of source and sink has own safety buffer

transcode.Init();

SetSurfaceAuxIDR();

m_pBSProcessor-GetInputBitstream(&m_pmfxBS);

Transcode();Decode();Encode();//choose one to run

CTranscodingPipeline.Run()

m_pmfxSession.reset(new MFXVideoSession);

CTranscoding.Run

PreENC is related to LA . LA :[-la] - use the look ahead bitrate control algorithm (LA BRC).Look Ahead. Special encoding mode where encoder performs pre analysis of several frames before actual encoding starts.

sample_multi_transcode

DecodeFrameAsync()

PutBS()