Forcing I-Frame for all, but output is IDR

Gaming and Visualization Technologies Video Processing & Optical Flow
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1

I am trying to encode all frames as I-frame, but first two frames are getting dropped and the remaining all frames are IDR-frames.
NVIDIA Video Codec SDK v11.4
GPU Quadro P2000
Following are the parameter settings.

  • codecGuid = NV_ENC_CODEC_H264_GUID
  • presetGuid = NV_ENC_PRESET_DEFAULT_GUID
  • profileGuid = NV_ENC_H264_PROFILE_MAIN_GUID
  • enablePTD = 0
  • gopLength = 1;
  • idrPeriod = NVENC_INFINITE_GOPLENGTH
  • frameIntervalP = 0
  • rateControlMode = NV_ENC_PARAMS_RC_CONSTQP;
  • constQP.qpIntra = 0;
  • constQP.qpInterB = 0;
  • constQP.qpInterP = 0;
  • pictureType = NV_ENC_PIC_TYPE_I
  • encodePicFlags = NV_ENC_PIC_FLAG_FORCEINTRA
  • refPicFlag = 1
  • displayPOCSyntax = framCnt (Incremental)
2

Please check these options;

  • idrPeriod = NVENC_INFINITE_GOPLENGTH
    • encodePicFlags = NV_ENC_PIC_FLAG_FORCEINTRA
3

Thank you.